JP5372686B2 - Medical tube - Google Patents

Description

The present invention relates to a medical tube.

  For patients who cannot take their own nutrition through their mouths, it is necessary to take nutrition into the body using some means for life support. As an example of such means, a medical tube (so-called nutrition tube) that is inserted nasally and placed in a digestive tract such as the stomach or intestine to administer nutrition is well known. This type of tube is originally inserted on the esophagus side in order to place the distal end portion in the stomach or intestine, but it is rarely accidentally inserted on the airway side and the distal end portion may be placed in the lower airway.

  In such a case, in the case of a normal patient, inadvertent placement is often prevented by coughing or vomiting. However, in the case of an unconscious patient or the like, a biological reaction such as coughing or vomiting does not necessarily occur, and it is necessary to confirm the indwelling by some method.

  Thus, as a method for confirming whether or not the tube has been inserted into the esophagus and the distal end portion has been placed in the stomach, the following has been proposed. As a first conventional method, a liquid (usually gastric juice) in the body is aspirated and collected from the tip of the inserted tube, and the gastric juice is brought into contact with blue litmus paper. There is a method for determining that the device is indwelled (see, for example, Patent Document 1). Similarly, there is a method in which the pH of the liquid in the body is measured using a pH electrode to confirm the indwelling position of the tube tip (second conventional method).

  Further, as a third conventional method, there is a method of injecting air from the tube proximal end portion to the distal end portion and listening to the vibration sound at that time with a stethoscope to determine the indwelling position of the tube distal end portion.

  Further, as a fourth conventional method, there is a method of judging the indwelling position of the distal end portion of the tube by seeing through the body with X-rays.

JP 2005-34423 A

However, the above conventional method has the following problems.
In the case of the first conventional method using blue litmus paper, even if an attempt is made to suck gastric juice, collection may not be possible depending on the accumulation of gastric juice in the patient. For this reason, it is difficult to accurately determine an erroneous placement and lack of certainty. In the second conventional method using a pH electrode, it is difficult to discriminate it for the same reason.

  In the case of the third conventional method using a stethoscope, the gastric juice is not collected directly, but only by indirectly listening to the sound as a judgment material, the certainty of discrimination is further reduced.

  The fourth conventional method using X-rays is more reliable than the first and second conventional methods, but has a problem that it is not preferable in terms of reducing radiation exposure for medical purposes as much as possible. In addition to this, since a large-scale facility is required, it is lacking in simplicity and cost.

The present invention has been made in view of the above problems, and its object is despite the misplacement can see exactly, it is to provide a medical tube which is excellent in convenience and cost properties.

Therefore, as a result of diligent research to solve the above-mentioned problems, the inventors of the present application have focused on regular pressure changes in the body, especially minute and regular pressure changes caused by lung pressure (respiration pressure). The fact that there is no regular pressure change of this kind in the digestive tract was noted. Then, in order to use this fact for confirmation of misplacement, the idea is that a very thin film should be stretched on the tube proximal end side, and the above minute and regular pressure change should be detected by the behavior of the film. Finally, the following problem solving means 1 to 5 were conceived. These are listed below.

  [1] A medical tube comprising a tube main body to be inserted into the body orally or nasally and a connecting member connected to a proximal end portion of the tube main body and having at least one port, the port being openable and closable. The cap member is detachably attached to the port, and a liquid film can be stretched on the cap member, and a membrane-stretching through hole penetrating the outer surface and the inner surface of the cap member is formed. A medical tube characterized by being made.

  Therefore, according to the invention described in Means 1, in the inserted state of the tube body, a liquid film can be temporarily stretched in the film-clad through hole of the cap member as necessary, and the behavior of the liquid film is observed. be able to. In this case, for example, if the liquid film moves as the patient breathes, it is considered that the distal end of the tube is located in the lower airway, and it can be determined that it is an erroneous placement. Further, if the liquid film does not move with the patient's breathing, it is considered that the distal end of the tube is located in the stomach or the intestine, and it can be determined that it is not an erroneous placement. Therefore, unlike the method of directly collecting gastric juice, misplacement can be confirmed accurately. Moreover, when it is not necessary to confirm the erroneous placement, the port can be closed by attaching a cap member.

  [2] The membrane cap has a main cap in which a main cap body is connected to the connecting member via the first connecting portion, and the cap member is provided via the second connecting portion. A sub-cap main body is connected to the connecting member, the main cap main body or the first connecting portion, and includes a sub-cap that can be attached to and detached from the main cap main body. The medical tube according to means 1, wherein the membrane-clad through-hole is opened when the sub-cap is detached.

  Therefore, according to the invention described in the means 2, it is possible to perform erroneous placement confirmation by applying a liquid film to the membrane-clad through-hole with the main cap as a cap member attached to the port. When there is no need to perform erroneous placement confirmation, the port can be closed by attaching the sub cap to the main cap.

  [3] A main cap body is connected to the connection member via a first connecting portion, and is provided with a main cap that is detachable from the port and closes the port when mounted, and the membrane-clad through-hole And a sub cap in which the sub cap body is connected to the connecting member, the main cap body, or the first connecting portion via the second connecting portion. The medical tube described in 1.

  Therefore, according to the invention described in the means 3, it is possible to perform erroneous placement confirmation by applying a liquid film to the membrane-clad through-hole with the sub cap as a cap member attached to the port. When there is no need to perform erroneous placement confirmation, the port can be closed by attaching the main cap instead of the sub cap.

  [4] The connecting member includes a first main port and a second main port formed in the main flow path, and a side port formed in the sub flow path branched from the main flow path, and a proximal end of the tube main body. A three-way stopcock that is connected to a portion and performs flow path switching between the three ports, wherein the cap member is detachably attached to the side port. The medical tube according to any one of the above.

  Therefore, according to the invention described in the means 4, the cap member is attached to the side port, and the membrane-clad through-hole is formed in a state where the flow path is switched so as to communicate the main port side and the side port side. By placing a liquid film, it is possible to confirm erroneous placement. When there is no need to perform erroneous placement confirmation, the flow path can be switched so that the main port side and the side port side do not communicate with each other.

  [5] An opening area of the membrane-clad through hole is smaller than an opening area of the port to which the cap member is attached, and at least one of an opening edge and an inner peripheral surface of the membrane-clad through hole is uneven. The medical tube according to any one of the means 1 to 4, wherein a medical tube is provided.

  Therefore, according to the invention described in the means 5, in addition to the fact that the opening area of the membranous through-hole is reduced in the first place, it becomes easier to hold the liquid at the opening edge of the membranous through-hole due to the unevenness. For this reason, the liquid film stretched on the membrane-stretching through-hole is not easily broken, and erroneous placement confirmation is facilitated. The unevenness may be provided in at least a part of the membrane-permeable through-hole, but by providing it over the entire circumference, the liquid can be more reliably held at the opening edge of the membrane-permeable through-hole.

  Therefore, according to the first to fifth aspects of the invention, it is possible to provide a medical tube that is excellent in simplicity and cost despite the fact that erroneous placement can be confirmed accurately.

The partially broken front view which shows the medical tube of 1st Embodiment which actualized this invention. In the tube of the first embodiment, (a) is a plan view showing a fully open state, (b) is a partially broken front view showing the fully open state, and (c) is a partially broken front view showing a fully closed state, ( d) The partially broken front view which shows the state at the time of incorrect placement confirmation. (A) is an enlarged bottom view which shows the subcap main body which the tube of 1st Embodiment has, (b) is an enlarged front view. (A) is a schematic sectional drawing in the AA line of the through-hole formation member which the subcap main body of Fig.3 (a) has, (b)-(d) is a schematic sectional drawing which shows the modification. Schematic which shows the state which stretched the liquid film to the subcap at the time of incorrect placement confirmation. The partially broken front view which shows the medical tube of 2nd Embodiment which actualized this invention. The principal part enlarged front view which shows the tube of 2nd Embodiment. In the tube of another embodiment, (a) is a plan view showing a fully open state, (b) is a partially broken front view showing the fully open state, and (c) is a partially broken front view showing a state at the time of erroneous placement confirmation. FIG. 4D is a partially broken front view showing a completely closed state. The partially broken front view which shows the tube of another embodiment. The top view which shows the tube of another embodiment. The expanded bottom view which shows the subcap main body which the tube of another embodiment has. The expanded bottom view which shows the subcap main body which the tube of another embodiment has.

[First Embodiment]

  DESCRIPTION OF EMBODIMENTS Hereinafter, a first embodiment in which the present invention is embodied in a feeding tube and a method for confirming erroneous placement thereof will be described in detail with reference to FIGS.

  First, the basic configuration will be described. As shown in FIG. 1, the feeding tube 11 of this embodiment is a medical device for inserting nutrients by inserting it through the nasal cavity and placing its distal end in the stomach or intestine. The tube body 12 constituting the tube 11 is a flexible tubular member having a length of 120 cm and a thickness of 1.7 mm to 4 mm, and is made of a synthetic resin such as polyvinyl chloride not containing a plasticizer. A depth mark (depth scale) is provided on the outer peripheral surface of the tube body 12. The depth marks are usually located at six locations of 30 cm, 40 cm, 50 cm, 60 cm, 70 cm, and 80 cm from the tip of the tube body 12. A weight 13 is provided at the distal end 12 a of the tube body 12. The weight 13 is slightly larger in diameter than the tube main body 12 and has a shape with a rounded tip to reduce resistance when the tube main body 12 is inserted. Side holes 14 are formed at two locations on the outer peripheral surface of the weight 13, and a nutrient (not shown) is discharged through the side holes 14 into the stomach or intestine. Further, a guide wire 15 for easy insertion is inserted into the lumen of the tube main body 12 so as to be insertable / removable. The distal end of the guide wire 15 reaches the inside of the weight 13.

  A distal end portion 21 a of an adapter 21 as a connecting member is connected to the proximal end portion 12 b of the tube main body 12. The adapter 21 is formed of a synthetic resin such as polyvinyl chloride that does not contain a plasticizer, as with the tube body 12. The adapter 21 of this embodiment has one port 22 that opens at a base end portion 21b located on the opposite side of the distal end portion 21a connected to the tube main body 12. A nutrient supply tube (not shown) can be connected to the port 22.

  As shown in FIGS. 1 and 2, a main cap 31 that can be attached to and detached from the port 22 is provided at a position near the base end 21 b on the outer peripheral surface of the adapter 21. The main cap 31 of the present embodiment includes a main cap body 32, a first connecting portion 33, and a knob portion 34. The main cap 31 is formed integrally with the adapter 21. Therefore, like the adapter 21, the main cap 31 is formed of a synthetic resin such as polyvinyl chloride containing no plasticizer. The main cap body 32 is a circular member in plan view, and has a recess 35 on the back surface 32b side. One end of a strip-shaped first connecting portion 33 is connected to the outer peripheral portion of the main cap body 32, and the other end of the first connecting portion 33 is connected to a predetermined position in the outer peripheral portion of the adapter 21. Therefore, the main cap body 32 is connected to the adapter 21 via the first connecting portion 33. At another position on the outer peripheral portion of the main cap main body 32, a knob portion 34 as an operation portion at the time of attachment / detachment is projected. The main cap body 32 is not provided with a hole that allows the front surface 32a and the back surface 32b to communicate with each other. Therefore, when the main cap body 32 is mounted, the port 22 of the adapter 21 is completely closed (see FIG. 2C).

  Next, a characteristic configuration in the present embodiment will be described. As shown in FIG. 2 to FIG. 4, the adapter 21 includes a sub cap 41 as a cap member that is used when erroneous placement confirmation is performed. The sub cap 41 of this embodiment includes a sub cap main body 42, a second connecting portion 43, and a knob portion 44. The sub cap 41 is also integrally formed with the adapter 21 like the main cap 31, and is therefore formed of a synthetic resin such as polyvinyl chloride that does not contain a plasticizer. The sub-cap body 42 is a circular member in plan view, and has a recess 45 on the back surface 42b side. One end of a belt-like second connecting portion 43 is connected to the outer peripheral portion of the sub cap body 42. The other end of the second connecting portion 43 is connected to the base end portion 21b in the outer peripheral portion of the adapter 21 and the position opposite to the position where the first connecting portion 33 is connected. Therefore, the sub cap body 42 is connected to the adapter 21 via the second connecting portion 43. At another position on the outer peripheral portion of the main cap main body 32, a knob portion 44 that is an operation portion at the time of attachment / detachment protrudes.

  A ring-shaped through-hole forming member 46 projects from the center portion of the sub-cap body 42 on the front surface 42a side, and the through-hole for membrane tension that connects the front surface 42a and the back surface 42b in the through-hole forming member 46. 47 is formed. The membrane tensioning through-hole 47 is a portion for temporarily tensioning the liquid film 51 for the purpose of confirming erroneous placement. As the liquid used when the liquid film 51 is stretched, for example, ordinary water can be used, and a liquid containing a surfactant such as soapy water is preferably used. The membrane-clad through-hole 47 of this embodiment is circular in plan view, and its opening area is considerably smaller than the opening area of the port 22. When the sub-cap body 42 is attached, the port 22 of the adapter 21 is not completely closed, and is opened at the membrane-sealing through-hole 47 (see FIG. 2D).

  As shown in FIG. 3 and FIG. 4A, the opening edge of the through hole forming member 46 is grooved, and as a result, the unevenness 46a is provided over the entire periphery of the opening edge. Yes. When there is such an unevenness 46a, the liquid used when the liquid film 51 (see FIG. 5) is stretched is easily held. The through hole forming member 46 of the present embodiment is formed integrally with the sub cap main body 42 by an injection molding method, but a separately formed one is bonded to the sub cap main body 42 by a method such as adhesion or fitting. It may be attached.

  Incidentally, FIGS. 4B to 4D show through hole forming members 46A, 46B, and 46C of modified examples. That is, the through hole forming member 46A shown in FIG. 4B has irregularities on the inner peripheral surface, and specifically, a female screw 46e is formed. With such a female screw portion 46e, integral molding with the sub-cap body 42 is also possible. In the case of this configuration, the liquid is easily held by the female screw portion 46e, and the formation of the liquid film 51 is facilitated. The through-hole forming member 46B shown in FIG. 4C has a shape in which the inner peripheral surface swells in an arc shape. Accordingly, a portion (small diameter portion) 46f in which the inner diameter of the membrane-clad through-hole 47 is minimized is generated inside the through-hole forming member 46B, and the liquid film 51 can be formed at the portion 46f. In the through hole forming member 46C shown in FIG. 4 (d), the inner diameter of the membrane stretching through hole 47 is entirely small, and a protruding portion 46g projects from the opening edge.

 In addition, since the liquid film 51 drawn with the continuous line in FIG. 5 is flat, the state when the pressure is not applied to the front end side 12a of the tube main body 12 is shown. Since the liquid film 51 drawn with a broken line in FIG. 5 swells outward, it shows a state when pressure is applied to the distal end side 12 a of the tube body 12.

  Hereinafter, the usage method of the nutrition tube 11 of this embodiment is described.

  First, the approximate length to be inserted (ie, the length to the stomach) is measured. Then, it is confirmed that the distal end of the guide wire 15 is correctly inserted to the distal end of the weight 13 and that the wire adapter at the proximal end of the guide wire 15 is fitted in the adapter 21. Next, anesthesia and a lubricant (such as lidocaine jelly) are applied from the distal end portion 12a of the tube body 12 to a position of 15 cm to 20 cm to improve the slip, and then the insertion of the tube 11 into the nasal cavity is started. When the distal end 12a of the tube main body 12 reaches the cardia (about 40 cm to 50 cm), the tube 11 is further pushed to reach the stomach. After reaching, the guide wire 15 is pulled out from the tube body 12 and removed.

  At this stage, the sub-cap body 42 is attached to the port 22 of the adapter 21 as shown in FIG. That is, the membrane-permeable through-hole 47 is only open on the proximal end side of the tube 11 with the tube body 12 inserted. Next, a liquid is adhered to the region including the membrane-tightening through-hole 47, and the liquid film 51 is temporarily stretched in the film-forming through-hole 47, and the behavior is observed.

  As a result of the observation, if the liquid film 51 moves with the patient's breathing and repeats expansion / contraction, it is considered that the distal end portion 12a of the tube main body 12 is located in the lower airway, and it is an erroneous placement. Can be determined. In this case, the tube 11 is immediately pulled out and replaced with a new tube 11, and the insertion operation is performed again.

  Further, if the liquid film 51 does not move with the patient's breathing, it can be determined that the distal end portion 12a of the tube main body 12 is located in the stomach or intestine, and that it is not an erroneous placement. In this case, the tube 11 is fixed with a surgical tape or the like, and a series of insertion operations is completed. When performing nutrient administration, the port 22 is opened, a nutrient supply tube is connected, and the nutrient is supplied through the tube. When no nutritional administration is performed, the main cap 31 is fitted to the port 22, and the port 22 is closed so that foreign matter does not enter.

As described above, according to this embodiment, the following operational effects can be obtained.
According to this tube 11, the liquid film 51 can be stretched on the proximal end side of the tube body 12 as necessary as described above. Therefore, a method for directly collecting gastric fluid, a method using a pH electrode, and a stethoscope are used. Unlike the method, etc., it is possible to accurately confirm the misplacement. Further, the erroneous placement confirmation method of the present embodiment using the tube 11 does not cause a problem that the patient is exposed to radiation unlike the method using X-rays. In addition, large-scale equipment is not necessary. Therefore, the method of this embodiment is excellent in terms of simplicity and cost.

[Second Embodiment]
Next, a second embodiment embodying the present invention will be described with reference to FIGS. 6 and 7, but the detailed description is omitted instead of attaching the same member numbers to the common parts with the first embodiment. To do.

  As shown in FIGS. 6 and 7, the feeding tube 61 includes not only the adapter 21 as a connection member but also a three-way cock 71 as a connection member. This three-way cock 71 has three main ports: a first main port 72 (tube distal end port), a second main port 73 (tube proximal end port), and a side port 74. The first main port 72 and the second main port 73 are formed in the main flow path in the three-way cock 71. On the other hand, the side port 74 is formed in a sub-flow path that branches from the main flow path in the vertical direction. Normally, the side port 74 is used for injecting medicinal solutions and collecting stomach contents and the like. The three-way cock 71 is connected so as to be interposed between the distal end portion of the adapter 21 and the proximal end portion of the tube main body 12. The three-way stopcock 71 includes a lever 75 that is rotatably attached. By switching the lever 75, the flow path is switched between the three ports 72, 73, and 74. Yes.

  As shown in FIGS. 6 and 7, the tube 61 includes a cap member 81 that is detachably attached to the side port 74. The cap member 81 is a circular member in plan view, has a recess 83 on the back surface 81b side, and is formed with a membrane-clad through hole 47 that allows the front surface 81a and the back surface 81b to communicate with each other. The opening area of the membrane-permeable through-hole 47 is smaller than the opening area of the side port 75. In addition, the cap member 81 of the present embodiment is configured as a separate body from other members that configure the tube 61.

  In order to confirm erroneous placement using the tube 61, first, a cap member 81 is attached to the side port 74, and a flow path is provided so that the first main port 72 side communicates with the side port 74 side. Is switched. In this state, the liquid film 51 is stretched over the film-clad through hole 47 of the cap member 81, and the behavior thereof may be observed. Even with the configuration of the present embodiment, it is possible to provide the tube 61 excellent in simplicity and cost despite the fact that erroneous placement can be confirmed accurately.

[Another embodiment]
In addition, you may change embodiment of this invention as follows.

  In the first embodiment, the tube 11 including the adapter 21 having only one port 22 is illustrated. However, a tube including an adapter having two ports 22 (so-called Y-type adapter) may be used.

  In the first embodiment, it is assumed that the sub cap 41 having the sub cap main body 42 in which the membrane-permeable through-hole 47 is formed is provided, and the sub cap main body 42 is connected to the adapter 21 via the second connecting portion 43. The one connected to is illustrated. Instead of this, for example, the sub-cap body 42 may be connected to the main cap body 32 or the first connection portion 33 via the second connection portion 43.

  In the first embodiment, the sub cap 41 is used as a cap member and the membrane-permeable through-hole 47 is formed on the cap member. However, the membrane cap-made through-hole 47 is formed on the main cap as a cap member. May be. For example, a tube 81 according to another embodiment shown in FIG. 8 includes a main cap 31A in which the membrane-permeable through-holes 47 are formed and a sub cap 41A in which the membrane-permeable through-holes 47 are not formed. The main cap main body 32 constituting the main cap 31 </ b> A is connected to the adapter 21 via the first connecting portion 33. A sub-cap body 42 that can be attached to and detached from the main cap body 32 is connected to the main cap body 32 via a second connecting portion 43. The main cap 31A and the sub cap 41A are integrally formed with the adapter 21 by injection molding. 8 is formed slightly larger than the main cap body 32, and can be externally fitted to the main cap body 32.

  -The tube 101 of another embodiment shown in FIG. 9 is provided with the subcap 102 which has the subcap main body 103 quite small unlike the subcap main body 42 of FIG. Therefore, the sub-cap body 103 is not externally fitted to the main cap body 3 and enters the membrane-permeable through-hole 47 to close it.

  -It is good also as a structure by which the subcap main body 42 was connected to the 1st connection part 33 via the 2nd connection part 43 like the tube 121 of another embodiment shown in FIG. Alternatively, the sub cap body 42 may be connected to the adapter 21 via the second connecting portion 43.

  In the first embodiment, the sub cap 41 as a cap member is integrally formed with the adapter 21 or the like, but may be formed as a separate body. Moreover, in the said 2nd Embodiment, although the cap member 81 was formed separately from the three-way cock 71, you may integrally mold these. Specifically, for example, the cap member 81 may be connected to the outer peripheral surface of the side port 74 in the three-way cock 71 via a strip-shaped connecting portion.

  In each of the above embodiments, the same polyvinyl chloride as the adapter 21 or the like is used as the synthetic resin material of the cap member that forms the membrane-permeable through-hole 47, but other than that, for example, polypropylene, polyethylene, polycarbonate, ABS resin or the like can also be used.

  In each of the embodiments described above, the membrane-permeable through-hole 47 formed in the cap member has a smaller diameter than the opening diameter of the port 22 (in other words, the opening area is small), but may have the same diameter.

  In another embodiment shown in FIG. 8, the sub-cap body 41A can be externally fitted to the main cap body 32 of the main cap 31A that is a cap member. Instead of this, the sub cap body 41A may be structured to be screwable with respect to the main cap body 32, for example. Note that two portions of the sub cap body 41 </ b> A are provided with cutout portions 42 c for allowing the first connection portion 33 and the second connection portion 43 to escape when the main cap body 32 is externally fitted.

  In the first embodiment, the through hole forming member 46 formed on the cap member is made of a dense body, but may be made of, for example, a porous body (or mesh member). According to this configuration, since the liquid is held in the pores of the through hole forming member 46, the liquid film 51 can be easily formed.

  In addition, like the tube 141 of another embodiment shown in FIG. 11, a frame 142 that divides the membrane-forming through-holes 47 into a plurality may be provided in the inner region of the through-hole forming member 46. The frame 142 in the tube 141 has a structure in which one circular wire is supported at three locations using three linear wires. As a result, the membrane-carrying through-hole 47 is partitioned into four regions having a small area, and the liquid film 51 can be easily formed. Such a frame 142 may be formed separately from the through hole forming member 46 or may be integrally formed.

  In each of the above-described embodiments, the number of membrane-tightening through holes 47 formed in the cap member is basically one. However, like the tube 161 of another embodiment shown in FIG. A plurality of may be formed.

  The medical tubes of the present invention embodied in the above embodiments are all for instilling the distal end portion 12a of the tube body 12 in the digestive organ. It may be for depressurizing or washing.

  The technical ideas grasped from the embodiments of the present invention are listed below.

  (1) In the means 1, the opening area of the membrane-clad through hole is smaller than the opening area of the port to which the cap member is mounted, and a plurality of the membrane-clad through holes are formed. .

  (2) In the means 1, the membrane-clad through hole is formed, and a main cap having a main cap body connected to the connection member via a first connection portion is provided as the cap member, and the connection member, The main cap main body and the first connecting portion are formed separately from each other, and include a sub cap that can be attached to and detached from the main cap main body. The membrane-permeable through hole is configured to be opened when the sub cap is detached.

  (3) In the means 1, the cap member is provided with a ring-shaped through-hole forming member having the membrane-stretching through-hole by integral molding.

  (4) In the means 1, the cap member is attached with a ring-shaped through-hole forming member that is formed separately from the cap member and has the membrane-permeable through-hole.

  (5) In the above idea 3 or 4, the through hole forming member is made of a mesh member.

  (6) In the above idea 3 or 4, the through hole forming member is made of a porous body.

  (7) In the above idea 3 or 4, the through hole forming member has a small diameter portion on the inner peripheral surface thereof.

  (8) In the idea 3 or 4, the through-hole forming member is provided with a frame that divides the film-forming through-hole into a plurality of pieces.

  (9) In any one of the means 1 to 6, the medical tube is for injecting nutrients, depressurizing, or washing by placing the distal end of the tube body in a digestive organ. And the membrane-permeable through hole is for confirming erroneous placement in the lower airway at the distal end of the tube body.

DESCRIPTION OF SYMBOLS 11, 61, 81, 101, 121, 141, 161 ... Nutrition tube as medical tube 12 ... Tube main body 12a ... Tip part 12b ... Base end part 21 ... Adapter as connecting member 22 ... Port 31, 31A ... Cap member Main cap body 32 ... Main cap body 33 ... First connecting portion 41, 41A, 102 ... Sub cap as a cap member 42,103 ... Sub cap body 43 ... Second connecting portion 46a ... Roughness 47 ... Thickness through-hole 51 ... Liquid film 71 ... Three-way stopcock as connecting member 72 ... First main port 73 ... Second main port 74 ... Side port

Claims (5)

A medical tube comprising a tube body to be inserted into the body orally or nasally and a connecting member connected to a proximal end of the tube body and having at least one port, the port being openable and closable,
A cap member that can be attached to and detached from the port is provided, and a liquid film can be stretched on the cap member, and a through-hole for membrane tension is formed through the outer surface and the inner surface of the cap member. A medical tube characterized by that. The cap member is provided with a main cap in which the membrane-clad through hole is formed and a main cap body is connected to the connection member via a first connecting portion,
A sub-cap body is connected to the connection member, the main cap body or the first connection part via a second connection part, and includes a sub-cap detachable from the main cap body,
2. The medical use according to claim 1, wherein the membranous through hole is closed when the sub cap is attached, and the membranous through hole is opened when the sub cap is detached. tube. A main cap body is coupled to the connection member via the first coupling portion, and is detachable from the port, and includes a main cap that closes the port when mounted.
The membrane-clad through hole is formed, and the connection member, the main cap body, or a sub cap in which the sub cap body is connected to the first connection part via a second connection part, is provided as the cap member. The medical tube according to claim 1. The connection member has a first main port and a second main port formed in the main flow path, and a side port formed in a sub flow path branched from the main flow path, and is connected to a proximal end portion of the tube body And a three-way stopcock that switches the flow path between the three ports,
The medical tube according to any one of claims 1 to 3, wherein the cap member is formed to be detachable from the side port. The opening area of the membrane-clad through hole is smaller than the opening area of the port to which the cap member is attached,
The medical tube according to any one of claims 1 to 4, wherein at least one of an opening edge and an inner peripheral surface of the membrane-permeable through hole is provided with unevenness.

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