JP7570073B2 - Medical suction equipment - Google Patents

Description

The present invention relates to a medical suction device.

An example of a medical suction instrument is described in Patent Document 1.
The medical suction instrument of Patent Document 1 (described in the document as a water supply/suction/irrigation tube for endoscopic surgery) comprises a long tubular body (described in the document as an inner tube) and a lumen (described in the document as a second hollow hole) formed inside the tubular body, and it is possible to eject liquid and aspirate liquid via the lumen.

JP 2016-049364 A

According to the inventors' investigations, there is still room for improvement in the structure of the technology disclosed in Patent Document 1 for aspirating bodily fluids from a living body.

The present invention was made in consideration of the above problems, and provides a medical suction device with a structure that can more effectively suction bodily fluids from a living body.

According to the present invention, a medical device includes an elongated tubular body,
The tubular body includes:
a first lumen for liquid delivery and a second lumen for suction, the first lumen and the second lumen being arranged in parallel with each other and extending along the longitudinal direction of the tubular body;
a liquid discharge hole that opens on an outer peripheral surface of the tubular body and discharges liquid from a tip end of the first lumen;
a peripheral suction hole that opens on the outer peripheral surface of the tubular body at a tip side of the liquid discharge hole and communicates with the second lumen;
having
The liquid can be discharged through the first lumen and the liquid discharge hole, and the liquid can be sucked through the peripheral suction hole and the second lumen .
The peripheral suction holes are arranged at a plurality of locations in a circumferential direction of the tubular body,
The tubular body includes:
a partition wall separating the first lumen and the second lumen from each other;
a blocking member that is filled in a tip portion of the first lumen on the tip side of the liquid discharge hole and blocks the tip portion of the first lumen;
having
The partition has an extension portion extending toward a distal end side beyond the blocking member,
The peripheral suction holes include a first peripheral suction hole and a second peripheral suction hole located on opposite sides of the extension portion,
A communication hole that connects the first lumen and the second lumen to each other is formed in the extension portion,
the first circumferential suction hole communicates with a portion of the second lumen extending along the extending portion via a portion of the first lumen extending along the extending portion and the communication hole,
The second peripheral suction hole is directly connected to a portion of the second lumen that extends along the extension portion,
the tubular body has a tip suction hole that opens to a tip surface that is an end surface of the tip side of the tubular body and faces the distal side in the longitudinal direction,
the tip suction hole includes a first tip suction hole opening at a tip of a portion of the first lumen extending along the extension portion, and a second tip suction hole opening at a tip of a portion of the second lumen extending along the extension portion,
suctioning a liquid through the first tip suction hole, a portion of the first lumen extending along the extension portion, the communication hole, and the second lumen;
Suction of liquid through the second tip suction hole and the second lumen;
A medical suction device is provided that is capable of

The present invention allows for better aspirating of bodily fluids from a living body.

1 is a diagram showing an overall configuration of a medical suction instrument according to an embodiment; FIG. 2 is a side view of a tubular body in the medical suction instrument according to the embodiment. 1 is a longitudinal sectional view of a tubular body in a medical suction instrument according to an embodiment. FIG. 1 is a front view of a tip of a tubular body in a medical suction instrument according to an embodiment. FIG. 5(a), 5(b), 5(c) and 5(d) are cross-sectional views of a medical suction instrument according to an embodiment, in which FIG. 5(a) is a cross-sectional view taken along line A-A shown in FIG. 2, FIG. 5(b) is a cross-sectional view taken along line B-B shown in FIG. 2, FIG. 5(c) is a cross-sectional view taken along line CC shown in FIG. 2, and FIG. 5(d) is a cross-sectional view taken along line D-D shown in FIG. 2. 6(a) to 6(g) are a series of process diagrams illustrating an example of a procedure for forming a connecting portion in a medical suction instrument according to an embodiment. 1 is a schematic diagram of an endoscope according to an embodiment, illustrating an insertion section and an operation section.

Hereinafter, an embodiment of the present invention will be described with reference to Fig. 1 to Fig. 7. In all the drawings, the same components are denoted by the same reference numerals, and the description thereof will be omitted as appropriate.
Furthermore, the various components of the medical suction instrument 100 of the present invention do not necessarily have to be independent entities, and it is permitted that one component is a part of another component, that part of one component overlaps with part of another component, etc.
In the following description, the distal side of the medical suction instrument 100 is also referred to as the tip side, and the proximal side is also referred to as the base side. The distal end (tip) refers to the range including the distal end (top end) and its periphery, and the proximal end (base) refers to the range including the proximal end (bottom end) and its periphery.
In addition, in the following, the axial direction of the tubular body 10 may be simply referred to as the axial direction, the radial direction of the tubular body 10 may be simply referred to as the radial direction, and the circumferential direction of the tubular body 10 may be simply referred to as the circumferential direction.

As shown in any one of Figures 1 to 5(d), the medical suction instrument 100 according to this embodiment comprises a long tubular body 10. The tubular body 10 has a first lumen 21 for liquid delivery and a second lumen 22 for suction, which are arranged in parallel with each other and are each formed along the longitudinal direction of the tubular body 10, a liquid discharge hole 13 that opens onto the outer circumferential surface of the tubular body 10 and discharges liquid from a tip 10a of the first lumen 21, and a peripheral suction hole 14 that opens onto the outer circumferential surface of the tubular body 10 further towards the tip side than the liquid discharge hole 13 and communicates with the second lumen 22.
It is possible to discharge liquid via the first lumen 21 and the liquid discharge hole 13 , and to suck liquid via the peripheral suction hole 14 and the second lumen 22 .

In this embodiment, the medical suction instrument 100 is used to eject liquid such as saline into a biological lumen, and to aspirate bodily fluids (typically diluted bodily fluids) from the biological lumen.

According to this embodiment, a flow path for liquid delivery, through which a liquid such as physiological saline flows, is formed by the first lumen 21 for liquid delivery and the discharge hole 13, and a flow path for suction, through which a body fluid or the like from a living body lumen flows, is formed by the second lumen 22 for suction and the peripheral suction hole 14. That is, since the flow path for liquid delivery and the flow path for suction are independent of each other, the medical suction instrument 100 can effectively perform both the discharge of a liquid (hereinafter, a dilution liquid) to a living body and the suction of a liquid (hereinafter, a suction liquid) from a living body.
More specifically, the medical suction instrument 100 can be used to eject dilution liquid into the biological lumen and then aspirate the suction liquid from within the biological lumen, and can also be used to eject dilution liquid into the biological lumen while aspirating the suction liquid from within the biological lumen.
Therefore, for example, even if the amount of body fluid secreted from the living body is insufficient or the viscosity of the body fluid is high, the body fluid can be more effectively sucked out of the body lumen by ejecting dilution liquid into the inside of the body lumen through the discharge hole 13 and mixing and diluting the body fluid with the dilution liquid, and then sucking up the liquid (aspirated liquid) obtained.

In this embodiment, the tubular body 10 is a long hollow tubular member. The tubular body 10 has a first lumen 21 and a second lumen 22 therein.
2 and 3, each of the first lumen 21 and the second lumen 22 is formed over the entire length of the tubular body 10. Note that Fig. 3 is a cross-sectional view taken along line AA shown in Fig. 4.
The distal ends of the first lumen 21 and the second lumen 22 are open at the distal end of the tubular body 10. The proximal end of the first lumen 21 is connected to a liquid supply branch 31 (see FIG. 1), and the proximal end of the second lumen 22 is connected to a suction branch 32 (see FIG. 1).

As shown in Figures 2 and 3, the tubular body 10 has, for example, a partition 16 that separates the first lumen 21 and the second lumen 22 from each other, and a blocking member 18 (see Figure 5 (b) etc.) that fills the tip portion of the first lumen 21 on the tip side of the discharge hole 13 and blocks the tip portion of the first lumen 21.
The partition 16 has, for example, an extension portion 17 that extends further toward the tip side than the blocking member 18 .
More specifically, the partition 16 passes through the axis of the tubular body 10 and is formed from the tip (distal end) to the base (proximal end) of the tubular body 10. A pair of wall surfaces of the partition 16 face opposite to each other and each face in the radial direction. The partition 16 radially separates the first lumen 21 and the second lumen 22.
As shown in Figures 2, 3 and 5(a), the tubular body 10 has, for example, a circumferential wall portion 19 and a partition wall 16, and the circumferential wall portion 19 includes a first circumferential wall portion 19a that defines a first lumen 21 together with the partition wall 16, and a second circumferential wall portion 19b that defines a second lumen 22 together with the partition wall 16.
4, the overall shape of the peripheral wall portion 19 as viewed from the distal end side is, for example, an elliptical ring shape. A partition wall 16 is provided inside the peripheral wall portion 19 along the minor axis direction of the peripheral wall portion 19. Thus, the partition wall 16 divides the first lumen 21 and the second lumen 22 from each other in the major axis direction.
The blocking member 18 is located in the first lumen 21 on the distal side of the discharge hole 13. Also, the blocking member 18 is located, for example, on the proximal side of the circumferential suction hole 14. More specifically, each of the distal end 18a and the proximal end 18b of the blocking member 18 is located on the distal side of the discharge hole 13 and on the proximal side of the circumferential suction hole 14.
The occlusion member 18 separates the portion of the first lumen 21 that is more proximal than the occlusion member 18 from the portion of the first lumen 21 that is more distal than the occlusion member 18. That is, the occlusion member 18 separates a portion 21a (see FIGS. 2 and 3) extending along the extension portion 17 from a portion 21b (see FIGS. 2 and 3) extending along a region of the partition wall 16 that is more proximal than the extension portion 17.
In addition, in the tubular main body 10, an opening 11 that opens onto the outer circumferential surface of the tubular main body 10 is formed at a location corresponding to the formation region of the blocking member 18. A part of the blocking member 18 is exposed to the outside of the tubular main body 10 through the opening 11, for example.
The blocking member 18 is, for example, an adhesive, and is formed by locally filling the inner cavity of the first lumen 21 with the adhesive through the opening 11 using a syringe.
However, for example, the distal end of the first lumen 21 may be blocked by pushing a blocking member 18 that has been molded separately in advance into the inner cavity of the first lumen 21 .

5(a) to 5(d), the cross-sectional shape of each of the first lumen 21 and the second lumen 22 is, for example, a semi-ellipse obtained by dividing an ellipse in the major axis direction. In other words, the transverse cross-sectional shape of each of the first lumen 21 and the second lumen 22 is, for example, a semi-ellipse obtained by dividing an ellipse in the major axis direction.
The first lumen 21 and the second lumen 22 are symmetrical to each other with respect to the axis.
However, the cross-sectional shape of each of the first lumen 21 and the second lumen 22 is not particularly limited, and may be, for example, circular or elliptical.
The diameter (circle equivalent diameter) of the first lumen 21 and the diameter (circle equivalent diameter) of the second lumen 22 are set to be, for example, equal to each other.
Furthermore, the diameter (equivalent circle diameter) of the first lumen 21 and the diameter (equivalent circle diameter) of the second lumen 22 are each uniform, for example, regardless of the position in the axial direction of the tubular body 10. However, the diameter (equivalent circle diameter) of the first lumen 21 and the diameter (equivalent circle diameter) of the second lumen 22 may each differ, for example, depending on the position in the axial direction. Furthermore, the diameter (equivalent circle diameter) of the first lumen 21 and the diameter (equivalent circle diameter) of the second lumen 22 may be set to, for example, different dimensions from each other.

As shown in Fig. 5(c), the liquid discharge hole 13, for example, penetrates the first circumferential wall portion 19a. That is, the liquid discharge hole 13 communicates between the outside of the medical suction instrument 100 and the internal space of the first lumen 21. The diluent liquid injected into the first lumen 21 is discharged from the liquid discharge hole 13 into the biological lumen. In Fig. 5(c), the movement of the diluent liquid is indicated by arrows.
As shown in Figs. 2, 3 and 5(c), in this embodiment, the number of the liquid discharge hole 13 is, for example, one.
In the axial direction, the length from the center of the liquid discharge hole 13 to the tip surface 12 of the tubular body 10 is, for example, preferably 20 mm or more and 60 mm or less, and more preferably 30 mm or more and 50 mm or less.
The diameter of the liquid discharge hole 13 is preferably, for example, 0.5 mm or more and 1.2 mm or less, and more preferably 0.7 mm or more and 1.0 mm or less.
In the present invention, the number of the liquid discharge holes 13 is not particularly limited and may be, for example, multiple. When the number of the liquid discharge holes 13 is multiple, the liquid discharge holes 13 may be arranged, for example, at multiple locations in the circumferential direction or at multiple locations in the longitudinal direction. Furthermore, the diameters of the liquid discharge holes 13 may be, for example, the same dimensions as each other or different dimensions from each other.

As shown in FIG. 5(a), the circumferential suction holes 14 penetrate, for example, the first circumferential wall portion 19a or the second circumferential wall portion 19b. That is, the circumferential suction holes 14 connect the outside of the medical suction instrument 100 to the internal space of the second lumen 22. The aspirated liquid in the biological lumen is aspirated from the circumferential suction holes 14 into the second lumen 22. Note that in FIG. 5(a), the movement of the aspirated liquid is indicated by arrows.

In this embodiment, the peripheral suction holes 14 are disposed at a plurality of locations in the longitudinal direction of the tubular main body 10 .
Since multiple circumferential suction holes 14 are formed in the longitudinal direction of the tubular body 10, even if any one of the circumferential suction holes 14 in the longitudinal direction is blocked by biological tissue, the suction liquid can be sucked in effectively from the other circumferential suction holes 14.

Furthermore, in this embodiment, the peripheral suction holes 14 are disposed at a plurality of locations in the circumferential direction of the tubular body 10 .
Since multiple circumferential suction holes 14 are formed in the tubular body 10 in the circumferential direction, even if any one of the circumferential suction holes 14 in the circumferential direction is blocked by biological tissue, the suction liquid can be sucked in well from the other circumferential suction holes 14.

More specifically, as shown in Figures 2 and 3, in this embodiment, the circumferential suction hole 14 includes a first circumferential suction hole 14a and a second circumferential suction hole 14b located on opposite sides of the extension portion 17.
Further, the extension 17 of the partition wall 16 is formed with a communication hole 17a (see Figs. 2 and 5(a)) that allows the first lumen 21 and the second lumen 22 to communicate with each other, for example.
The first circumferential suction hole 14a is connected to a portion 22a (see Figures 2 and 3) extending along the extension portion 17 in the second lumen 22 via a portion 21a extending along the extension portion 17 in the first lumen 21 and a communication hole 17a, and the second circumferential suction hole 14b is connected directly to a portion extending along the extension portion 17 in the second lumen 22.
Therefore, even if one of the first circumferential suction hole 14a and the second circumferential suction hole 14b is blocked by biological tissue, the suction liquid can be sucked in effectively from the other of the first circumferential suction hole 14a and the second circumferential suction hole 14b.
More specifically, as described above, the portion 21a extending along the extension portion 17 and the portion 21b extending along the region of the partition wall 16 on the base end side from the extension portion 17 are separated from each other by the blocking member 18. Therefore, the aspirated liquid sucked from the first peripheral suction hole 14a does not flow into the region of the first lumen 21 communicating with the liquid discharge hole 13 (the portion 21b extending along the region of the partition wall 16 on the base end side from the extension portion 17), but flows into the second lumen 22 through the portion 21a extending along the extension portion 17 and the communication hole 17a in the first lumen 21, and is further sucked into the suction instrument described later. Also, the aspirated liquid sucked from the second peripheral suction hole 14b flows directly into the second lumen 22 and is sucked into the suction instrument described later.
In this manner, the medical suction instrument 100 can suck liquid from both the first peripheral surface suction holes 14a and the second peripheral surface suction holes 14b.

As shown in FIG. 5A, the first peripheral suction hole 14a, for example, penetrates the first peripheral wall portion 19a.
2, for example, two first peripheral suction holes 14a are formed, and the two first peripheral suction holes 14a are arranged at different positions from each other in the longitudinal direction of the tubular body 10 and arranged at the same position from each other in the circumferential direction. Also, the two first peripheral suction holes 14a are arranged at the same position as one of the liquid discharge holes 13, for example, in the circumferential direction.
As shown in FIG. 5A, the second peripheral suction hole 14b, for example, penetrates the second peripheral wall portion 19b.
For example, two second circumferential suction holes 14b are formed, and the two second circumferential suction holes 14b are arranged at different positions from each other in the longitudinal direction of the tubular body 10, but are arranged at the same position from each other in the circumferential direction.
In other words, the peripheral suction holes 14 are disposed at two locations in the longitudinal direction of the tubular body 10 and at two locations in the circumferential direction of the tubular body 10 .
5A, the first peripheral suction hole 14a on the base end side and the second peripheral suction hole 14b on the base end side are arranged to face each other at 180 degrees in the circumferential direction. Similarly, the first peripheral suction hole 14a on the tip end side and the second peripheral suction hole 14b on the tip end side are arranged to face each other at 180 degrees in the circumferential direction.
As a result, for example, by rotating the tubular body 10 about its axis, the orientation (opening orientation) of the discharge hole 13 can be rotated 360 degrees while the suction liquid can be sucked from within the biological lumen through each of the circumferential suction holes 14 (the first circumferential suction hole 14a and the second circumferential suction hole 14b). Therefore, the suction liquid can be sucked while the dilution liquid is satisfactorily dispersed within the biological lumen.
As shown in Fig. 5(a), the diameters of the first peripheral suction holes 14a and the second peripheral suction holes 14b are set to be equal to each other, for example. Note that the cross-sectional view taken along line E-E in Fig. 2 is omitted because it is the same as Fig. 5(a).

The communicating holes 17a are formed, for example, in the extension portion 17 in portions corresponding to the first circumferential suction hole 14a on the base end side and the second circumferential suction hole 14b on the base end side, and in portions corresponding to the first circumferential suction hole 14a on the tip end side and the second circumferential suction hole 14b on the tip end side.
Each communication hole 17a is, for example, a through hole that penetrates the extension portion 17 in the radial direction, and connects the first lumen 21 and the second lumen 22 to each other.

In the axial direction, it is preferable that the length dimension from the center of the first circumferential surface suction hole 14a on the tip side to the tip surface 12 of the tubular body 10 (the length dimension from the center of the second circumferential surface suction hole 14b on the tip side to the tip surface 12 of the tubular body 10) is, for example, 1 mm or more and 3 mm or less.
In addition, in the axial direction, it is preferable that the length dimension from the center of the first circumferential surface suction hole 14a on the base end side to the tip surface 12 of the tubular body 10 (the length dimension from the center of the second circumferential surface suction hole 14b on the base end side to the tip surface 12 of the tubular body 10) be, for example, 4 mm or more and 6 mm or less.
The diameter of each of the peripheral suction holes 14 is, for example, preferably 0.5 mm or more and 1.2 mm or less, and more preferably 0.7 mm or more and 1.0 mm or less. In addition, the diameter of the peripheral suction holes 14 and the diameter of the liquid discharge holes 13 are set to be equal to each other, for example, but the diameter of the peripheral suction holes 14 and the diameter of the liquid discharge holes 13 may be set to be different from each other, for example.

Furthermore, as shown in FIG. 4, the tubular body 10 has a tip suction hole 15 opening to the tip surface 12 of the tubular body, making it possible to suction liquid (aspirated liquid) through the tip suction hole 15 and the second lumen 22.
In the following description, the peripheral suction holes 14 (the first peripheral suction holes 14a and the second peripheral suction holes 14b) and the tip suction holes 15 may be collectively referred to as suction holes.
According to the above-mentioned configuration, suction holes (circumferential suction holes 14 or tip suction holes 15) are formed on both the outer peripheral surface and the tip surface 12 of the tubular body 10, so that even if one of the peripheral suction holes 14 and the tip suction holes 15 is blocked by biological tissue, the suction liquid can be sucked in well through the remaining suction hole.
More specifically, the tip suction hole 15 has a first tip suction hole 15a formed by an opening on the tip side of the first lumen 21, and a second tip suction hole 15b formed by an opening on the tip side of the second lumen 22.
The suction liquid sucked from the first tip suction hole 15a flows into the second lumen 22 through the portion of the first lumen 21 that extends along the extension portion 17 and the communication hole 17a, and is sucked into the suction instrument. The suction liquid sucked from the second tip suction hole 15b is sucked into the second lumen 22.

In the case of this embodiment, as an example, the medical suction instrument 100 is used by being inserted into a channel 320 (see FIG. 7) of an endoscope 300 (see FIG. 7). Note that the proximal end of the operation section 330 is not shown in FIG. 7. Also, in FIG. 7, the axis of the channel 320 is indicated by a dashed line.
The endoscope 300 has, for example, an insertion section 310 that is inserted into a body lumen, and an operation section 330 that is connected to the proximal end of the insertion section 310 .
By operating the operation portion 330, the insertion portion 310 can be bent.
The insertion section 310 is a hollow, long tubular member having a lumen 310a formed therein. The lumen 310a is formed over the entire length of the insertion section 310.
A through hole 330a is formed inside the operation section 330, and the through hole 330a communicates between the outside of the endoscope 300 and the lumen 310a of the insertion section 310. More specifically, a tip of the through hole 330a is connected to a base end of the lumen 310a, and an opening on the base end side of the through hole 330a opens into the outer circumferential surface of the operation section 330.
The channel 320 is constituted, for example, by the inner cavity of the through-hole 330a and the lumen 310a of the insertion section 310. More specifically, the tip-side opening 320a of the channel 320 is constituted, for example, by the tip-side opening of the lumen 310a, and the base-side opening 320b of the channel 320 is constituted, for example, by the base-side opening of the through-hole of the operation section 330. Therefore, the tip-side opening 320a of the channel 320 opens at the tip of the insertion section 310, and the base-side opening 320b of the channel 320 opens on the outer circumferential surface of the operation section 330.
The tubular body 10 is inserted into the channel 320 from, for example, an opening 320 b on the base end side of the channel 320 , and the tip portion 10 a of the tubular body 10 is exposed (protrudes) to the outside of the channel 320 from an opening 320 a on the tip side of the channel 320 .
7, the length of the through hole 330a (the length of the through hole 330a in the axial direction) is indicated by dimension L2, and the length of the lumen 310a (the length of the insertion section 310 in the axial direction) is indicated by dimension L3. In this embodiment, the length of the channel 320 of the endoscope 300 is, for example, the sum of dimensions L2 and L3.
Note that the insertion section 310 may have a plurality of lumens (not shown) therein in addition to the lumen 310a, for example.

As shown in Figures 1 and 2, the tubular main body 10 is formed with a first marking portion 41 which indicates, for example, the arrangement area of the liquid discharge hole 13. Note that in Figures 1 and 2, the area where the first marking portion 41 is formed is shaded with dots. Also, in Figure 5(c), among the parts that determine the outer diameter line of the outer circumferential surface of the peripheral wall portion 19, the part that corresponds to the first marking portion 41 is drawn with a thicker line than the other parts.
By using the position of the first marking portion 41 as an index, the position of the liquid discharge hole 13 within the body lumen can be accurately recognized, for example, via an image captured by an endoscope.

Furthermore, as shown in Figure 5 (c), the first marking portion 41 is formed on the outer surface of the tubular body 10 and is selectively arranged in an area corresponding to the liquid discharge hole 13 in the circumferential direction of the tubular body 10.
By using the position of the first marking portion 41 as an index, for example, the direction of the liquid discharge hole 13 (the direction of the opening) in the biological lumen can be accurately recognized based on an image captured by an endoscope. Therefore, the dilution liquid can be satisfactorily discharged into the biological lumen through the liquid discharge hole 13.
Here, the region corresponding to the liquid discharge hole 13 in the circumferential direction of the tubular body 10 means a region extending in both directions in the circumferential direction with the liquid discharge hole 13 as the center. Therefore, the above region is a predetermined angular range that includes the formation range of the liquid discharge hole 13. In the case of this embodiment, the first marking portion 41 is formed in 1/3 of the region in the circumferential direction (a range of 120 degrees).

In addition, in the longitudinal direction of the tubular body 10, for example, the tip position of the first marking portion 41 coincides with the tip position of the liquid discharge hole 13, and the base end position of the first marking portion 41 is located on the base end side of the base end position of the liquid discharge hole 13.
As a result, for example, by inserting the tubular body 10 into the channel 320 to a depth where the base end of the first marking portion 41 is exposed from the opening 320a at the tip side of the channel 320, the entire discharge hole 13 can be more reliably exposed from the channel 320, so that the dilution liquid can be discharged efficiently.
In addition, the tip position of the first marking portion 41 may be located, for example, closer to the tip side than the tip position of the liquid discharge hole 13, and the base end position of the first marking portion 41 may be, for example, coincident with the base end position of the liquid discharge hole 13.

1 and 2, the tubular main body 10 is formed with a second marking 42 indicating, for example, the arrangement region of the peripheral suction holes 14. In Fig. 1 and 2, the area where the second marking 42 is formed is shaded with dots. In Fig. 5(a), among the parts that determine the outer diameter line of the outer circumferential surface of the peripheral wall portion 19, the part that corresponds to the second marking 42 is drawn with a thicker line than the other parts.
By using the position of the second marking portion 42 as an index, the position of the circumferential suction hole 14 within the living body lumen can be accurately recognized based on an image captured by an endoscope, for example.
More specifically, the second marking portion 42 is formed on the outer surface of the tubular body 10, and is selectively arranged in regions corresponding to each circumferential suction hole 14 in the circumferential direction of the tubular body 10. That is, the second marking portion 42 includes a second marking portion 42a selectively arranged in a region corresponding to the first circumferential suction hole 14a, and a second marking portion 42b selectively arranged in a region corresponding to the second circumferential suction hole 14b.
Here, the region corresponding to the peripheral suction hole 14 in the peripheral direction of the tubular body 10 means a region extending in both directions in the peripheral direction with the peripheral suction hole 14 as the center. Therefore, the above-mentioned region is a predetermined angular range including the formation range of the peripheral suction hole 14.
In the present embodiment, the second marking portions 42a and 42b are each formed in a ⅓ region (a range of 120 degrees) in the circumferential direction.
By using the position of the second marking portion 42 as an index, for example, the direction (direction of the opening) of each circumferential suction hole 14 in the living body lumen can be accurately recognized based on an image captured by an endoscope. Therefore, the suction liquid can be satisfactorily sucked from the living body lumen through the circumferential suction hole 14.
In the longitudinal direction of the tubular body 10, the tip position of the second marking portion 42a, for example, coincides with the position of the tip surface 12, and the base end position of the second marking portion 42a coincides with the base end position of the first circumferential surface suction hole 14a on the base end side.
Similarly, in the longitudinal direction of the tubular body 10, the tip position of the second marking portion 42b, for example, coincides with the position of the tip surface 12, and the base end position of the second marking portion 42b coincides with the base end position of the second circumferential surface suction hole 14b on the base end side.
In addition, in the circumferential direction, the second marking portion 42a is formed in the same area as the first marking portion 41.

1 and 2, the tubular main body 10 has a third marking portion 43 formed, for example, on the proximal side of the first marking portion 41, and the length dimension of the tubular main body 10 from the second marking portion 42 to the third marking portion 43 corresponds to the length dimension of the channel 320 of the endoscope 300. In addition, in Figs. 1 and 2, the location where the third marking portion 43 is formed is shaded with dots.
As a result, by checking the position of the third marking portion 43 relative to the base-end opening 320b of the channel 320 of the endoscope 300, the position of the second marking portion 42 relative to the tip-end opening 320a of the channel 320 of the endoscope 300 can be recognized. That is, by aligning the third marking portion 43 with the base-end opening 320b, the position of the tip portion 10a of the tubular main body 10 relative to the tip-end opening 320a can be adjusted. As a result, the circumferential suction holes 14 can be easily exposed (protruded) from the tip-end opening 320a of the channel 320, so that the suction liquid can be smoothly sucked through the circumferential suction holes 14.
More specifically, in the case of this embodiment, the length dimension of the tubular body 10 from the tip of the second marking portion 42 to the base end of the third marking portion 43 (dimension L1 shown in FIG. 2) is set to, for example, a dimension equal to or longer than the total value of the length dimension of the channel 320 of the endoscope 300 (total value of dimensions L2 and L3) and the length dimension of the second marking portion 42 (length dimension in the axial direction). For this reason, for example, when the tubular body 10 is inserted into the channel 320 of the endoscope 300 to a depth where the third marking portion 43 is located on the tip side of the opening 320b on the base end side of the channel 320, each suction hole (tip suction hole 15, first circumferential surface suction hole 14a, and second circumferential surface suction hole 14b) is exposed (protrudes) from the opening 320b on the tip side. Therefore, the suction liquid can be smoothly sucked through each suction hole.
As shown in Fig. 2 and Fig. 5(d), the third marking portion 43 is formed on the outer surface of the tubular main body 10. In Fig. 5(d), among the portions that determine the outer diameter line of the outer peripheral surface of the peripheral wall portion 19, the portion that corresponds to the third marking portion 43 is made with a thicker line than the other portions.
In this embodiment, the third marking portion 43 is formed in a 1/3 region (a range of 120 degrees) in the circumferential direction. In addition, in the circumferential direction, the third marking portion 43 is formed in the same region (angle range) as the first marking portion 41 and the second marking portion 42a.

In the present embodiment, for example, the endoscope 300 is a type used in the upper digestive tract, and the length dimension of the channel 320 is, for example, 1000 mm or more and 1100 mm or less. Therefore, it is preferable that the length dimension L1 of the tubular body 10 from the second marking portion 42 to the third marking portion 43 is, for example, 1100 mm or more and 1300 mm or less.
However, the length dimension L1 of the tubular main body 10 from the second marking portion 42 to the third marking portion 43 can be appropriately set according to the length dimension of the channel 320 of the endoscope 300 to be used.
Moreover, the length dimension of the first marking portion 41 in the axial direction is preferably, for example, not less than 4.0 mm and not more than 6.0 mm.
Furthermore, the length dimension of the second marking portion 42 in the axial direction is preferably, for example, not less than 4.0 mm and not more than 6.0 mm.
Moreover, the length dimension of the third marking portion 43 in the axial direction is preferably, for example, not less than 4.0 mm and not more than 6.0 mm.

The first marking portion 41 to the third marking portion 43 are formed, for example, by applying ink to each of them. The color of the ink is not particularly limited, but is, for example, black. However, the first marking portion 41 to the third marking portion 43 may be formed with ink of different colors.
In the case of this embodiment, as an example, the first marking portion 41 to the third marking portion 43 are formed after the liquid discharge hole 13 and each of the peripheral suction holes 14 are formed. Therefore, the ink is also applied to each of the inner peripheral surfaces of the liquid discharge hole 13 and each of the peripheral suction holes 14.
Furthermore, for example, when the medical suction instrument 100 is used under X-ray (radiation) observation, the first marking portion 41 to the third marking portion 43 may each be made of an X-ray opaque material such as platinum or tungsten, and may be embedded in the tubular body 10 or provided on the outer surface of the tubular body 10.

The tubular body 10 is made of a resin material such as polyvinyl chloride, polyurethane, and polyamide. By making the tubular body 10 out of a resin material such as polyvinyl chloride, polyurethane, and polyamide, the workability of the tubular body 10 is improved.

It is also preferable that, for example, a hydrophilic layer (not shown) is formed on the outer circumferential surface of the tubular body 10. By doing so, it is possible to reduce the sliding resistance when the medical suction instrument 100 is inserted into a biological lumen.
The hydrophilic layer may be formed over the entire length of the tubular body 10, or may be formed in a partial region in the axial direction at the distal end portion of the tubular body 10.
The material of the hydrophilic layer is not particularly limited, but examples thereof include hydrophilic resin materials such as maleic anhydride polymers such as polyvinyl alcohol (PVA) and copolymers thereof, and polyvinylpyrrolidone.

The diameter of the tubular body 10 is not particularly limited, but is preferably 2 mm or more and 5 mm or less. The total length of the tubular body 10 is not particularly limited, but is preferably 1500 mm or more and 2000 mm or less.
Additionally, the outer diameter of the distal-most end of the tubular body 10 may, for example, expand slightly toward the distal side.

As shown in FIG. 1, the medical suction instrument 100 has, for example, a liquid supply branch 31 for supplying a dilution liquid to the first lumen 21, and a suction branch 32 connected to a suction instrument (not shown). Each of the liquid supply branch 31 and the suction branch 32 is connected to the proximal end of the tubular body 10 via a connecting portion 30.

The liquid supply branch 31 communicates with the first lumen 21 via an opening at the tip side of the liquid supply branch 31. A liquid supply connector 31a (see FIG. 1 ) is provided at the proximal end of the liquid supply branch 31. A liquid supply syringe (not shown) is attached to the liquid supply connector 31a.
In this embodiment, by supplying dilution liquid from the liquid delivery syringe to the liquid delivery connector 31a, the dilution liquid can be injected into the living body through the liquid delivery branch tube 31, the first lumen 21, and the liquid discharge hole 13.

The suction branch 32 communicates with the second lumen 22 via an opening at the distal end of the suction branch 32. A suction connector 32a (see FIG. 1) is provided at the proximal end of the suction branch 32. For example, a suction syringe (not shown) or a suction device (not shown) is attached to the suction connector 32a.
In this embodiment, by connecting the medical suction instrument 100 to a suction syringe or a suction source (not shown) via the suction instrument, the suction liquid can be sucked from the biological lumen into the suction instrument through each of the peripheral suction holes 14 and the tip suction hole 15, the second lumen 22, and the suction branch tube 32.

The connecting portion 30 has, for example, a first tube 36 formed in a cylindrical shape, and a second tube 37 inserted around the first tube 36 .
The base end 10b of the tubular body 10 is inserted into the first tube 36 through an opening on the distal end side of the first tube 36, and the distal end of each of the liquid supply branch tube 31 and the suction branch tube 32 is inserted into the first tube 36 through an opening on the proximal end side of the first tube 36. Thus, the tubular body 10, the liquid supply branch tube 31, and the suction branch tube 32 are each integrally bound by the first tube 36.
In this state, the proximal end of the portion constituting the first lumen 21 in the tubular body 10 is connected to the distal end of the fluid delivery branch tube 31, and the proximal end of the portion constituting the second lumen 22 in the tubular body 10 is connected to the distal end of the suction branch tube 32.
The inner peripheral surface of the distal end of the first tube 36 is disposed along the outer peripheral surface of the tubular body 10, and the inner peripheral surface of the proximal end of the first tube 36 is disposed along the outer peripheral surfaces of the liquid supply branch 31 and the suction branch 32. Meanwhile, a gap is formed between the inner peripheral surface of the middle part of the first tube 36 in the axial direction (part excluding the distal end and proximal end) and the outer peripheral surface of the tubular body 10, and this gap is filled with adhesive 220. This makes it possible to maintain the state in which each of the liquid supply branch 31 and the suction branch 32 is connected to the proximal end of the tubular body 10 in a good condition.
The adhesive 220 is not particularly limited, but may be, for example, a urethane adhesive.

The distal end of the second tube 37 is located distal to the distal end of the first tube 36, and its inner circumferential surface is arranged along the outer circumferential surface of the tubular body 10. Similarly, the proximal end of the second tube 37 is located proximal to the proximal end of the first tube 36, and is arranged along the outer circumferential surfaces of the liquid delivery branch tube 31 and the suction branch tube 32. The inner circumferential surface of the central portion of the second tube 37 in the axial direction (excluding the distal end and proximal end portions) is arranged along the outer circumferential surface of the first tube 36, for example. Therefore, the second tube 37 is inserted around the first tube 36 while covering the entire first tube 36.

Next, an example of a procedure for forming the connecting portion 30 will be described with reference to Fig. 6(a) to Fig. 6(g). Each of Fig. 6(a) to Fig. 6(g) is a cross-sectional view taken along the axial direction of part A (the area surrounded by the dashed line) in Fig. 1.
6(a), a region including, for example, the proximal end of the portion constituting the second lumen 22 is selectively removed from the base end portion 10b of the tubular main body 10. As a result, for example, the proximal end of the portion constituting the second lumen 22 in the tubular main body 10 is disposed closer to the distal end than the proximal end of the portion constituting the first lumen 21.
Next, the core 210 is inserted into each of the first lumen 21 and the second lumen 22. The proximal end of the core 210 inserted into the first lumen 21 is exposed (protruding) to the outside through an opening on the proximal end side of the first lumen 21, and the proximal end of the core 210 inserted into the second lumen 22 is exposed (protruding) to the outside through an opening on the proximal end side of the second lumen 22. Then, as shown in Fig. 6(b) , the liquid supply branch tube 31 is inserted onto the proximal end of the core 210 inserted into the first lumen 21, and the suction branch tube 32 is inserted onto the proximal end of the core 210 inserted into the second lumen 22. Next, the proximal end of the portion of the tubular body 10 that constitutes the first lumen 21 is connected to the distal end of the fluid delivery branch tube 31, and the proximal end of the portion of the tubular body 10 that constitutes the second lumen 22 is connected to the distal end of the suction branch tube 32.
6(c), the first tube 36 is extrapolated onto the base end 10b, the liquid supply branch 31, and the suction branch 32 so as to integrally cover the joint (boundary) between the base end 10b of the tubular body 10 and the liquid supply branch 31 and the joint (boundary) between the base end 10b of the tubular body 10 and the suction branch 32. The distal end of the first tube 36 is disposed distal to the proximal end of the portion constituting the second lumen 22 in the tubular body 10, and the proximal end of the first tube 36 is disposed proximal to each of the distal end of the liquid supply branch 31 and the distal end of the suction branch 32.
6(d), the inner peripheral surface of the distal end of the first tube 36 is fixed to the outer peripheral surface of the tubular body 10 by selectively heat-shrinking the distal end of the first tube 36. Furthermore, adhesive 220 is injected into the gap between the inner peripheral surface of the first tube 36 and the outer peripheral surface of the tubular body 10. Here, since the distal end of the first tube 36 is fixed to the tubular body 10, the adhesive 220 can be well stored in the gap between the inner peripheral surface of the first tube 36 and the outer peripheral surface of the tubular body 10. In addition, since the core 210 is inserted into each of the first lumen 21 and the second lumen 22, the adhesive 220 can be prevented from flowing into each of the first lumen 21 and the second lumen 22. Similarly, since the core 210 is inserted into each of the liquid supply branch 31 and the suction branch 32, the adhesive 220 can be prevented from flowing into each of the inner cavities of the liquid supply branch 31 and the suction branch 32.
6(e), the entire first tube 36 is heat-shrunk to fix the liquid supply branch 31 and the suction branch 32 to the proximal end of the tubular body 10 via the first tube 36. At this time, the proximal end of the portion of the tubular body 10 that constitutes the first lumen 21 and the distal end of the liquid supply branch 31 are liquid-tightly heat-sealed to each other. Similarly, the proximal end of the portion of the tubular body 10 that constitutes the second lumen 22 and the distal end of the suction branch 32 are liquid-tightly heat-sealed to each other. In this state, the inner circumferential surface of the distal end of the first tube 36 is disposed along the outer circumferential surface of the tubular body 10, and the inner circumferential surface of the proximal end of the first tube 36 is disposed along the outer circumferential surfaces of the liquid supply branch 31 and the suction branch 32.
6(f), the core 210 inserted in the first lumen 21 and the liquid supply branch tube 31 is removed, and the core 210 inserted in the second lumen 22 and the liquid supply branch tube 31 is removed. Then, the second tube 37 is inserted onto the first tube 36 so as to integrally cover the base end 10b of the tubular body 10, the liquid supply branch tube 31, the suction branch tube 32, and the first tube 36, respectively. In this state, the distal end of the second tube 37 is located distal to the distal end of the first tube 36, and the proximal end of the second tube 37 is located proximal to the proximal end of the first tube 36.
The timing for removing the core 210 may be, for example, after the second tube 37 has been thermally shrunk.
Next, as shown in Fig. 6(g), the entire second tube 37 is heat-shrunk. In this state, the distal end of the second tube 37 is located distal to the distal end of the first tube 36, and its inner peripheral surface is disposed along the outer peripheral surface of the tubular body 10. Similarly, the proximal end of the second tube 37 is located proximal to the proximal end of the first tube 36, and is disposed along the outer peripheral surfaces of the liquid supply branch tube 31 and the suction branch tube 32. Moreover, the inner peripheral surface of the central portion of the second tube 37 in the axial direction (part excluding the distal end and proximal end) is disposed along the outer peripheral surface of the first tube 36.
In this manner, the connecting portion 30 that connects each of the liquid supply branch tube 31 and the suction branch tube 32 to the tubular body 10 can be formed.

Here, the first tube 36 is preferably made of, for example, a transparent (visible light transparent) resin material. In this way, when the first tube 36 integrally covers the base end 10b, the liquid supply branch 31, the suction branch 32, and the first tube 36, the positions of the proximal end of the base end 10b, the distal end of the liquid supply branch 31, and the distal end of the suction branch 32 can be easily visually confirmed. Therefore, it can be easily confirmed whether the proximal end of the portion constituting the first lumen 21 in the tubular main body 10 is connected to the distal end of the liquid supply branch 31 and whether the proximal end of the portion constituting the second lumen 22 in the tubular main body 10 is connected to the distal end of the suction branch 32.
In addition, the second tube 37 is preferably made of, for example, an opaque (opaque to visible light) resin material, so that the joint between the base end 10b of the tubular body 10 and the liquid supply branch 31, the joint between the base end 10b of the tubular body 10 and the suction branch 32, and the first tube 36 can be made invisible from the outside, thereby improving the appearance of the connecting portion 30.

In the following, as an example, a case will be described in which the medical suction instrument 100 is used to collect RNA contained in pancreatic juice.
The following description will be given assuming that at least the tip of the insertion section 310 of the endoscope 300 is placed inside the duodenum in advance, and the operation section 330 of the endoscope 300 is placed outside the living body.

First, the distal end portion 10a of the tubular body 10 of the medical suction instrument 100 is inserted into the channel 320 of the endoscope 300 from the proximal opening 320b of the channel 320. At this time, the tubular body 10 is inserted into the channel 320 to a depth where the third marking portion 43 is located distally of the proximal opening 320b. This allows the peripheral suction holes 14 at the distal end to be easily exposed (protrude) from the distal opening 320a of the channel 320.
Next, a liquid supply syringe (not shown) filled with a dilution liquid such as physiological saline is attached to the liquid supply connector 31a. The surgeon injects the dilution liquid from the liquid supply syringe into the liquid supply connector 31a. The injected dilution liquid passes through the liquid supply branch 31 and the first lumen 21, and is injected into the duodenum through the liquid discharge hole 13, and is mixed with the body fluids in the duodenum, including pancreatic juice.
Next, when suction is performed using a suction syringe (not shown) connected to the medical suction instrument 100 via a suction instrument (not shown), or when a suction source (not shown) is operated, the mixture of the dilution liquid and the body fluid, i.e., the suction liquid, is sucked from the suction holes (circumferential suction holes 14 and tip suction hole 15) through the second lumen 22 and the suction branch tube 32 into the liquid collection section (not shown) of the suction instrument.
In this manner, the medical suction instrument 100 according to the present embodiment can easily aspirate a sufficient amount of pancreatic juice regardless of the amount of pancreatic juice secreted or the viscosity of the pancreatic juice.
In this embodiment, the aspirated liquid does not necessarily have to contain the dilution liquid. The aspirated liquid may contain bile or duodenal secretions. The mixture ratio of the dilution liquid and pancreatic juice is not particularly limited.

Here, the tip of the insertion section 310 of the endoscope 300 may be bent toward the inner wall surface of the duodenum, for example, and the tip 10a of the tubular body 10 may protrude from the tip opening 320a of the channel 320 in a direction substantially perpendicular to the inner wall surface. In this case, even if the tip surface 12 of the tubular body 10 is blocked by the inner wall surface, the medical suction instrument 100 can suck the suction liquid through the peripheral suction holes 14 opening on the outer circumferential surface of the tubular body 10.
Also, there may be cases where the tip of the insertion section 310 of the endoscope 300 is in a straight state (not bent), and the tip 10a of the tubular body 10 protrudes from the tip opening 320a along the surface direction of the inner wall surface of the duodenum. In this case, even if either the first circumferential suction hole 14a or the second circumferential suction hole 14b is blocked by the inner wall surface, the medical suction instrument 100 can suck the suction liquid through the tip suction hole 15 opening in the tip surface 12 of the tubular body 10, and either the first circumferential suction hole 14a or the second circumferential suction hole 14b.
Thus, according to this embodiment, the aspirated liquid can be satisfactorily aspirated from inside the duodenum regardless of the bending angle of the insertion section 310 of the endoscope 300 .
Furthermore, as described above, the circumferential suction holes 14 are disposed at a plurality of locations in the longitudinal direction of the tubular body 10, and are also disposed at a plurality of locations in the circumferential direction of the tubular body 10. Therefore, for example, even if a treatment instrument other than the medical suction instrument 100 is inserted into the insertion portion 310 and any of the suction holes (circumferential suction holes 14 and tip suction hole 15) is blocked due to interference with the treatment instrument, the suction liquid can be satisfactorily sucked from the other suction holes.

Each embodiment has been described above with reference to the drawings, but these are merely examples of the present invention, and various configurations other than those described above can also be adopted.

For example, in the above, an example was described in which the length dimension of the tubular body 10 from the second marking portion 42 to the third marking portion 43 corresponds to the length dimension of the channel 320 of the endoscope 300, but the length dimension of the tubular body 10 from the first marking portion 41 to the third marking portion 43 may also correspond to the length dimension of the channel 320 of the endoscope 300. In this case, when the tubular body 10 is inserted into the endoscope to a depth where the third marking portion 43 is located distal to the base end opening 320b of the channel 320 of the endoscope 300, each of the discharge hole 13 and each of the peripheral suction holes 14 will be exposed (protruding) from the distal end opening 320a of the channel 320.

Also, in the above, an example was described in which the first circumferential suction hole 14a communicating with the first lumen 21 is formed, and the blocking member 18 separates the portion 21a in the first lumen 21 that extends along the extension 17 from the portion 21b that extends along the region of the partition 16 that is more base-side than the extension 17. However, if the first circumferential suction hole 14a is not formed in the tubular body 10, the blocking member 18 may be filled, for example, up to the vicinity of the tip of the tubular body 10.

The present embodiment encompasses the following technical ideas.
(1) A device having an elongated tubular body,
The tubular body includes:
a first lumen for liquid delivery and a second lumen for suction, the first lumen and the second lumen being arranged in parallel with each other and extending along the longitudinal direction of the tubular body;
a liquid discharge hole that opens on an outer peripheral surface of the tubular body and discharges liquid from a tip end of the first lumen;
a peripheral suction hole that opens on the outer peripheral surface of the tubular body at a tip side of the liquid discharge hole and communicates with the second lumen;
having
A medical suction instrument capable of discharging liquid through the first lumen and the discharge hole, and suctioning liquid through the peripheral suction hole and the second lumen.
(2) The medical suction instrument according to (1), wherein the peripheral suction holes are disposed at a plurality of locations in the longitudinal direction of the tubular body.
(3) The medical suction instrument according to (1) or (2), wherein the peripheral suction holes are disposed at a plurality of locations in the circumferential direction of the tubular body.
(4) The tubular body includes
a partition wall separating the first lumen and the second lumen from each other;
a blocking member that is filled in a tip portion of the first lumen on the tip side of the liquid discharge hole and blocks the tip portion of the first lumen;
having
The partition has an extension portion extending toward a distal end side beyond the blocking member,
The peripheral suction holes include a first peripheral suction hole and a second peripheral suction hole located on opposite sides of the extension portion,
A communication hole that connects the first lumen and the second lumen to each other is formed in the extension portion,
the first circumferential suction hole communicates with a portion of the second lumen extending along the extending portion via a portion of the first lumen extending along the extending portion and the communication hole,
The medical suction instrument according to (3), wherein the second circumferential suction hole is directly connected to a portion of the second lumen that extends along the extension portion.
(5) The medical suction instrument described in any one of (1) to (4), wherein the tubular body has a tip suction hole opening at a tip surface of the tubular body, and liquid can be suctioned through the tip suction hole and the second lumen.
(6) The medical suction instrument according to any one of (1) to (5), wherein the cross-sectional shape of the inner cavity of each of the first lumen and the second lumen is a semi-ellipse obtained by dividing an ellipse in the major axis direction.
(7) The medical suction instrument according to any one of (1) to (6), wherein the tubular body is formed with a first marking portion indicating an area where the liquid discharge hole is disposed.
(8) The medical suction instrument described in (7) above, wherein the first marking portion is formed on the outer surface of the tubular body and is selectively arranged in an area corresponding to the discharge hole in the circumferential direction of the tubular body.
(9) A medical suction instrument as described in (7) or (8), wherein, in the longitudinal direction of the tubular body, the tip position of the first marking portion coincides with the tip position of the discharge hole, and the base end position of the first marking portion is located on the base end side of the base end position of the discharge hole.
(10) The medical suction instrument according to any one of (1) to (9), wherein the tubular body is formed with a second marking portion indicating an arrangement area of the circumferential suction holes.
(11) The medical suction instrument is used by being inserted into a channel of an endoscope,
a third marking portion is formed on the tubular body on a proximal side of the first marking portion,
The medical suction instrument according to claim 10, wherein a length dimension of the tubular body from the second marking portion to the third marking portion corresponds to a length dimension of the channel of the endoscope.

10 Tubular body 10a Tip portion 10b Base portion 11 Opening 12 Tip surface 13 Discharge hole 14 Circumferential suction hole 14a First circumferential suction hole 14b Second circumferential suction hole 15 Tip suction hole 15a First tip suction hole 15b Second tip suction hole 16 Partition wall 17 Extension portion 17a Communication hole 18 Blocking member 19 Circumferential wall portion 19a First circumferential wall portion 19b Second circumferential wall portion 21 First lumen 21a Portion 21b extending along the extension portion in the first lumen Portion 21b extending along the region of the partition wall on the base end side from the extension portion in the second lumen 22 Second lumen 22a Portion 30 extending along the extension portion in the second lumen Second marking section 43 Third marking section 100 Medical suction instrument 210 Core 220 Adhesive 300 Endoscope 310 Insertion section 310a Lumen 320 Channel 320a Tip opening 320b Base opening 330 Operation section 330a Through hole

Claims (10)

A long tubular body,
The tubular body includes:
a first lumen for liquid delivery and a second lumen for suction, the first lumen and the second lumen being arranged in parallel with each other and extending along the longitudinal direction of the tubular body;
a liquid discharge hole that opens on an outer peripheral surface of the tubular body and discharges liquid from a tip end of the first lumen;
a peripheral suction hole that opens on the outer peripheral surface of the tubular body at a tip side of the liquid discharge hole and communicates with the second lumen;
having
The liquid can be discharged through the first lumen and the liquid discharge hole, and the liquid can be sucked through the peripheral suction hole and the second lumen .
The peripheral suction holes are arranged at a plurality of locations in a circumferential direction of the tubular body,
The tubular body includes:
a partition wall separating the first lumen and the second lumen from each other;
a blocking member that is filled in a tip portion of the first lumen on the tip side of the liquid discharge hole and blocks the tip portion of the first lumen;
having
The partition has an extension portion extending toward a distal end side beyond the blocking member,
The peripheral suction holes include a first peripheral suction hole and a second peripheral suction hole located on opposite sides of the extension portion,
A communication hole that connects the first lumen and the second lumen to each other is formed in the extension portion,
the first circumferential suction hole communicates with a portion of the second lumen extending along the extending portion via a portion of the first lumen extending along the extending portion and the communication hole,
The second peripheral suction hole is directly connected to a portion of the second lumen that extends along the extension portion,
the tubular body has a tip suction hole that opens to a tip surface that is an end surface of the tip side of the tubular body and faces the distal side in the longitudinal direction,
the tip suction hole includes a first tip suction hole opening at a tip of a portion of the first lumen extending along the extension portion, and a second tip suction hole opening at a tip of a portion of the second lumen extending along the extension portion,
suctioning a liquid through the first tip suction hole, a portion of the first lumen extending along the extension portion, the communication hole, and the second lumen;
Suction of liquid through the second tip suction hole and the second lumen;
A medical suction device that is capable of The distal end surface of the tubular body is elliptical in shape;
2. The medical suction instrument according to claim 1, wherein each of the first and second tip suction holes has a semi-elliptical shape obtained by dividing the elliptical shape of the tip surface of the tubular body in the major axis direction. 3. The medical suction instrument according to claim 2 , wherein the cross-sectional shape of the inner cavity of each of the first lumen and the second lumen is a semi-ellipse obtained by dividing an ellipse in the major axis direction. the tubular body has a peripheral wall portion that, together with the partition, defines the first tip suction hole and the second tip suction hole;
4. The medical suction instrument according to claim 2 or 3, wherein a thickness dimension of the partition at the tip surface of the tubular body is greater than a thickness dimension of a portion of the circumferential wall portion located on the major axis of the elliptical shape of the tip surface of the tubular body. The medical suction instrument according to claim 1 , wherein the peripheral suction holes are disposed at a plurality of positions in the longitudinal direction of the tubular body. The medical suction instrument according to claim 1 , wherein a first marking portion is formed on the tubular body to indicate an arrangement area of the liquid discharge hole. The medical suction instrument according to claim 6 , wherein the first marking portion is formed on the outer surface of the tubular body and is selectively arranged in an area corresponding to the discharge hole in the circumferential direction of the tubular body. 8. The medical suction instrument according to claim 6 or 7, wherein, in the longitudinal direction of the tubular body, a tip position of the first marking portion coincides with a tip position of the discharge hole, and a base end position of the first marking portion is located on the base end side of the base end position of the discharge hole. The medical suction instrument according to claim 6 , wherein the tubular body is formed with a second marking portion that indicates an arrangement area of the circumferential suction holes. The medical suction instrument is used by being inserted into a channel of an endoscope,
a third marking portion is formed on the tubular main body on a proximal side of the first marking portion,
10. The medical suction instrument of claim 9 , wherein a length dimension of the tubular body from the second marking portion to the third marking portion corresponds to a length dimension of the channel of the endoscope.

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