JP6768545B2 - Catheter wiping device - Google Patents

Description

The present invention relates to a catheter wiping device.

Conventionally, a technique of inserting a catheter into a blood vessel to make a diagnosis or the like has been performed. After the procedure, blood is attached to the catheter taken out from the blood vessel, and if it is left in the air as it is until it is reinserted into the blood vessel, a thrombus is formed.

When a catheter with a thrombus is inserted into a blood vessel, the thrombus may fall out into the blood vessel and cause obstruction of the blood vessel.Therefore, it is known that it is important to remove the blood attached to the catheter. At the site, the work of removing blood adhering to the catheter is adhered to.

As a method of removing the blood adhering to the catheter, for example, there is a method of immersing the catheter in a physiological saline solution filled in a vat for washing, and a method of wiping with a gauze soaked in the physiological saline solution.

Balloon catheters, microcatheter, etc. are washed by immersing the entire catheter in physiological saline in the bat, but for IVUS (intravascular ultrasound diagnosis) catheters and OCT / OFDI (optical interference tomography). A motor drive unit (MDU) is connected to the proximal end of a diagnostic imaging catheter such as a catheter, and the entire catheter cannot be inserted into the bat, so that blood is removed by wiping.

Further, even when a catheter robot that has been put into practical use in recent years is used, since the catheter robot is connected to the base end of the catheter, even if it is a balloon catheter or the like, the entire catheter is immersed in the bat. Cleaning is difficult and wiping may be a useful tool for blood removal.

At the time of wiping, the gauze is preferably lightly applied to the surface of the catheter, and in this way, even if a hydrophilic coating such as Patent Document 1 is applied to the surface of the catheter, the coating is not easily peeled off.

Japanese Patent Application Laid-Open No. 6-41310

However, the wiping is performed directly by hand, and the amount of force applied differs depending on the operator, so that the wiping may actually be strong, and as a result, the coating may be peeled off or the catheter surface may be damaged.

Therefore, an object of the present invention is to provide a catheter wiping device capable of suppressing peeling or scratching of the coating on the catheter surface due to wiping.

The catheter wiping device of the present invention for achieving the above object has a sponge and a support for supporting the sponge. The sponge is formed with an insertion portion through which the catheter can be inserted, and the support supports the sponge around the insertion direction in which the catheter can be inserted axially at the insertion portion.

According to the catheter wiping device having the above configuration, at the time of wiping, a force below a certain level acts from the sponge on the catheter inserted into the insertion portion of the sponge, and the wiping can be performed regardless of the force of the operator. Will be done. Therefore, unintentional strong wiping can be prevented, and peeling or scratching of the coating on the catheter surface can be suppressed.

It is a figure which shows the catheter wiping device of 1st Embodiment together with a catheter. It is a figure which shows the use state of the catheter wiping device of 1st Embodiment. It is a figure which shows the catheter wiping device of 2nd Embodiment together with a catheter robot. It is a figure which shows the catheter wiping device of the 3rd Embodiment provided integrally with a Y connector. It is a figure which shows the catheter wiping device of a modification.

Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. The dimensional ratios in the drawings are exaggerated for convenience of explanation and differ from the actual ratios.

<First Embodiment>
As shown in FIG. 1, the catheter wiping device 100 of the first embodiment has a sponge 110, a support 120, valves 130, 131, and a handle 140. The catheter wiping device 100 is used to wipe the blood adhering to the surface of the catheter 10.

The sponge 110 is formed of, for example, polyurethane, as long as it has good blood absorption, and may be formed of a material other than polyurethane. The sponge 110 is formed with an insertion portion 111 through which the catheter 10 can be inserted. The insertion portion 111 has a slit shape.

The support 120 supports the sponge 110 around the insertion direction D1 at which the catheter 10 can be inserted axially at the insertion portion 111. The sponge 110 and the support 120 are fixed by, for example, an adhesive.

The support 120 is provided in an arc shape around a part of the insertion direction D1, and the insertion portion 111 is a direction D2 around the insertion direction D1 that is orthogonal to the insertion direction D1 toward the side without the support 120. Open to. The catheter 10 can be inserted into the insertion portion 111 from the open side in direction D2.

The material for forming the support 120 is preferably silicon rubber, but the material is not limited to this, and may be other rubber or a resin other than rubber.

The valve body 130 is provided adjacent to a portion of the insertion portion 111 where the direction D2 is open, and a slit-shaped gap is formed so as to communicate therewith.

On the other hand, the valve body 131 is provided adjacent to the open portion of the insertion portion 111 in the direction D1, and a slit-shaped gap is formed so as to communicate therewith.

The valve body 130 and the valve body 131 have flexibility and appropriate elasticity, and the material for forming them is preferably silicon rubber, but is not limited thereto.

The handle 140 is provided integrally with the support 120 and projects from the support 120. The shape of the handle 140 is not particularly limited as long as it is easy for the user to hold by hand.

Next, the use of the catheter wiping device 100 will be described.

As shown in FIG. 2, the catheter wiping device 100 is used by inserting the catheter 10 into the insertion portion 111. The sponge 110 is preliminarily impregnated with physiological saline.

The catheter 10 is inserted through the gap between the valve bodies 130. At that time, the valve body 130 hits the surface of the catheter 10 with a force equal to or less than a certain level while being flexibly deformed, and wipes off the blood adhering to the catheter 10.

The insertion portion 111 into which the catheter 10 is inserted is flexibly deformed so as to follow the surface shape of the catheter 10. At this time, a force below a certain level is applied to the surface of the catheter 10 from the sponge 110. Further, the valve body 131 is also flexibly deformed so as to follow the surface shape of the catheter 10 and hits the surface of the catheter 10 with a force below a certain level.

The operator who performs the wiping holds the handle 140 in that state, and moves the catheter wiping device 100 and the catheter 10 relative to each other in the axial direction or rotates them relatively around the axial direction. Along with this, the blood adhering to the catheter 10 is wiped off while being absorbed by the sponge 110.

Further, when the operator relatively moves the catheter 10 and the catheter wiping device 100 in the axial direction, the valve body 131 moves relative to the surface of the catheter 10 so as to stroke the surface of the catheter 10, and blood from the surface of the catheter 10 Wipe off.

The catheter 10 is a catheter for image diagnosis such as a catheter for IVUS (intravascular ultrasound diagnosis) and a catheter for OCT / OFDI (optical interference tomography), and is removed from the blood vessel after the image diagnosis in the blood vessel. The blood adhering to the blood vessel is wiped off by the catheter wiping device 100. The catheter 10 has a coating on its surface, such as a hydrophilic coating.

Next, the action and effect of this embodiment will be described.

Unlike the present embodiment, when the operator presses the gauze against the surface of the catheter 10 and wipes it directly by hand, it may be wiped strongly depending on the force of the operator, and as a result, the catheter 10 is wiped. The coating on the surface of the catheter 10 may be peeled off, or the surface of the catheter 10 may be damaged.

On the other hand, according to the catheter wiping device 100 of the present embodiment, at the time of wiping, a force below a certain level acts on the catheter 10 from the sponge 110 and the valve bodies 130 and 131, regardless of the force applied by the operator. Wiping is done. Therefore, unintended strong wiping can be prevented, and it is possible to prevent the coating from peeling off from the surface of the catheter 10 or the surface of the catheter 10 from being damaged.

In the present embodiment, the valve bodies 130 and 131 wipe off the blood by stroking the surface of the catheter 10, so that the blood can be removed particularly effectively.

In the present embodiment, the insertion portion 111 is open in the direction D2, but if it is not opened and closed in this way, when an attempt is made to wipe a desired portion of the catheter 10, one end of the catheter 10 is opened. The catheter 10 and the catheter wiping device 100 must be relatively moved in the axial direction from the insertion direction D1 into the insertion portion 111, and from one end thereof to a desired portion to be wiped, which is troublesome.

On the other hand, in the present embodiment, since the insertion portion 111 is open in the direction D2, if the wiping portion of the catheter 10 is inserted from the opened side and set in the insertion portion 111, the catheter 10 is wiped from the end portion as described above. It is possible to save the trouble of moving the catheter 10 to the removal point in the axial direction, and to immediately wipe off the desired part of the catheter 10. Further, when the catheter 10 is removed from the insertion portion 111, the catheter wiping device 100 does not have to be relatively moved to one end of the catheter 10, so that the removal is easy.

Further, in the present embodiment, the handle 140 is provided, and the catheter wiping device 100 can be easily grasped and moved, so that the work load can be reduced. Further, since the handle 140 is provided, the operator does not have to touch the sponge 110 or the support 120 at the time of wiping, so that the operator's hand is placed on the catheter 10 set in the insertion portion 111. It is difficult for a strong force to be applied carelessly, and strong wiping is more reliably prevented.

If the material for forming the support 120 is silicone rubber, the support 120 has appropriate flexibility and elasticity. Therefore, when the catheter 10 is inserted into the insertion portion 111, the support 120 is flexibly deformed together with the sponge 110, and it is prevented that strong friction that causes peeling or scratching of the coating acts on the surface of the catheter 10. Further, the catheter 10 is firmly held by the insertion portion 111 by the elastic force.

<Second Embodiment>
As shown in FIG. 3, the catheter wiping device 200 of the second embodiment is provided integrally with the catheter robot 20.

The catheter robot 20 is remotely controlled by the operator to move the catheter 10 forward and backward in the axial direction. The catheter robot 20 can also rotate the catheter 10 around the axial direction. In this embodiment, the catheter 10 is, for example, a balloon catheter.

The catheter robot 20 has a connecting portion 21 to which the proximal end portion of the catheter 10 is connected, and by moving the catheter robot 20 forward and backward by a motor or a gear, the entire catheter 10 is moved forward and backward in the axial direction. When advancing the catheter 10 in the blood vessel, the connecting portion 21 advances, and when removing the catheter 10 from the blood vessel, the connecting portion 21 retracts. Further, the connecting portion 21 may be provided with a mechanism for rotating the catheter 10 in the axial direction.

The catheter wiping device 200 is arranged coaxially with the connection portion 21 on the distal end side.

The catheter wiping device 200 differs from the catheter wiping device 100 of the first embodiment in that the handle 140 is omitted, but the sponge 110, the insertion portion 111, the support 120, and the valves 130 and 131 are the first. It is the same as 1 Embodiment, and the duplicate description about them is omitted here. The catheter wiping device 200 is integrally connected to the catheter robot 20 by a support 120.

A catheter 10 is passed through the insertion portion 111 of the sponge 110, and when the connecting portion 21 retracts when the catheter 10 is removed from the blood vessel, the catheter 10 moves to the axial proximal end side accordingly. While passing through the insertion portion 111. As a result, the blood adhering to the surface of the catheter 10 is wiped off by the sponge 110 and wiped off by the valve body 131.

As described above, according to the present embodiment, the blood is automatically wiped together with the removal of the catheter 10 from the blood vessel, and the catheter 10 does not need to be removed and wiped separately, so that the work efficiency is good. ..

<Third Embodiment>
As shown in FIG. 4, the catheter wiping device 300 of the third embodiment is integrally provided on the proximal end side of the thumb wheel 31 with respect to the Y connector 30, and has a sponge 310 and a support 320.

The sponge 310 and the support 320 are different from them in that they are formed all around the insertion direction D1 instead of the half-split shape like the sponge 110 and the support 120 of the first embodiment, except for the shape. The configuration and function of are substantially the same as those.

The insertion portion 311 formed in the sponge 310 is a through hole, and is communicated with the thumb wheel 31 by an opening 312 opened on the thumb wheel 31 side. The thumb wheel 31 constitutes a proximal end side opening having a hemostatic function in the Y connector 30, and has a valve body for hemostasis inside, so that the opening 312 (a portion where the insertion portion is open) is provided. ) Is adjacent to the valve body.

The Y connector 30 is connected to a parent catheter, such as a guiding catheter, which is different from the catheter 10 via a rotator 32 at the tip, and guides the catheter 10 there. The thumb wheel 31, the rotator 32, and the main branch 33 between them communicate with each other, and the main branch 33 is provided with a side port 34 branched from the thumb wheel 31 and the main branch 33.

When the catheter 10 is removed from the parent catheter through the Y connector 30, blood is attached to the catheter 10, but the blood is wiped off by the valve body in the thumb wheel 31 in the process of removing the catheter 10. At the same time, it is wiped off while being absorbed by the sponge 310.

As described above, also in this embodiment, as in the second embodiment, the blood is wiped together with the removal of the catheter 10, so that it is not necessary to remove and wipe the catheter 10 separately, and the work efficiency is good.

The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the claims.

For example, the present invention includes a form in which either one or both of the valve bodies 130 and 131 are removed from the first and second embodiments.

Further, the shapes of the sponge and the support are not limited to the above-described embodiment. For example, the sponge 110A and the support 120A formed all around the insertion direction D1 as in the modified example catheter wiping device 100A shown in FIG. 5 are also included in the present invention. Further, the sponge and the support may be formed around the insertion direction D1 in a range larger than 180 ° and less than 360 °.

Further, the shape of the insertion portion is not limited to the slit shape like the insertion portion 111 of the above embodiment and the insertion portion 111A of the modified example, and for example, a relatively wide groove having a U-shaped cross section or a circular hole. It may be.

Further, the present invention can be applied not only to wiping blood but also to wiping body fluids other than blood, and wipes body fluids adhering to a catheter inserted into a biological lumen other than a blood vessel. May be good.

10 catheter,
20 catheter robot,
21 Connection,
30 Y connector,
31 thumb wheel,
32 Rotator,
33 main branch,
34 side port,
100, 100A, 200, 300 catheter wiping device,
110, 110A, 310 sponge,
111, 111A, 311 insertion part,
120, 120A, 320 supports,
130, 131 valve body,
140 handle,
D1 insertion direction,
D2 Direction perpendicular to the insertion direction.

Claims (7)

A sponge with an insertion part that allows the catheter to be inserted,
A support that supports the sponge and a support that supports the sponge around the insertion direction in which the catheter can be inserted axially at the insertion portion.
Ibid provided adjacent to open the insertion portion, have a, a valve body slit-like gap is formed so as to communicate with the insertion portion,
The valve body, that provided to strike the surface of the catheter which is inserted through the gap, catheter wiping device. The catheter wiping device according to claim 1, wherein the material for forming the valve body is silicone rubber . The support is provided in an arc shape in a part around the insertion direction, and the insertion portion is formed in a direction orthogonal to the insertion direction toward the side without the support in the circumference of the insertion direction. The catheter wiping device according to claim 1 or 2, which is open. The catheter wiping device according to any one of claims 1 to 3, which has a handle protruding from the support. Any of claims 1 to 3, wherein the catheter robot that moves the catheter forward and backward at least in the axial direction is integrally provided on the distal end side of the connecting portion to which the proximal end portion of the catheter is connected. The catheter wiping device according to one. The catheter wiping device according to any one of claims 1 to 3, wherein the insertion portion is integrally provided with the Y connector so as to communicate with the base end side of the thumb wheel. The catheter wiping device according to any one of claims 1 to 6, wherein the material for forming the support is silicone rubber.