JP5390236B2 - Auxiliary device and chemical solution injection port set provided with the same - Google Patents

Description

  The present invention relates to an auxiliary tool used when a catheter fixing member is attached to a connection portion between a drug solution injection port and a catheter, and a drug solution injection port set including the auxiliary tool.

  2. Description of the Related Art Conventionally, a catheter to which a drug solution injection port is connected is placed on a patient's body and a drug solution such as an anticancer drug or nutrient is supplied to a vein temporarily or over a long period of time. In this case, the distal end portion of the catheter is extended to a portion for supplying the chemical solution in the body, and a chemical solution injection port is connected to the proximal end portion of the catheter via a catheter fixing member. And the chemical | medical solution injection | pouring port is detained in the predetermined | prescribed position in the body which is easy to supply a chemical | medical solution by injection etc. from the outside body (for example, refer patent document 1).

  The implantable catheter device (chemical solution injection port set) includes a chemical solution injection port, a catheter connected to the chemical solution injection port, a sleeve (catheter fixing member) that covers a connection portion between the chemical solution injection port and the catheter, and the sleeve as a chemical solution. A cap (auxiliary tool) for attaching to the connection portion between the injection port and the catheter is provided. In addition, a cylindrical hole portion having an internal thread formed on the inner peripheral surface is formed at a side portion of the chemical solution injection port, and a connection pipe that extends through the hole portion to the outside is provided. The sleeve is formed of a cylindrical body having a lumen through which the catheter is inserted and a male screw that is screwed into the female screw of the drug solution injection port, and a portion other than the male screw on the outer peripheral surface of the sleeve extends in the axial direction. Are formed along the circumference.

  The cap is provided with a catheter insertion portion through which a catheter can be inserted and removed from the outer peripheral side to the center side of the cylindrical body, and a sleeve in which a concave portion of the sleeve is formed on the end surface side can be inserted with a matching shape. It is formed in a shape provided with a fitting portion. Therefore, with the catheter inserted through the sleeve, with the proximal end of the catheter connected to the connecting tube, the female screw of the hole and the male screw of the sleeve are screwed together, and the cap is fitted into the sleeve to attach the cap. By rotating, the female screw and the male screw can be strongly screwed together. As a result, the connection pipe of the drug solution injection port and the catheter are firmly connected.

JP-A-8-107934

  Since the drug injection port of the above-described implantable catheter device is attached to the proximal end portion of the catheter protruding from the incision portion having a length of only a few centimeters formed in the patient's body, the connection operation can be performed in a narrow space. It must be made. Then, when the drug solution injection port and the sleeve are connected by screwing between the female screw and the male screw as in the conventional implantable catheter device described above, it is necessary to rotate the sleeve using the cap. However, there is a problem that such an operation is difficult in a narrow space. Further, when the sleeve rotates, the catheter is sandwiched between the stationary connection tube and the rotating sleeve, and thus the catheter is twisted. For this reason, there also exists a problem that a catheter becomes easy to break.

  The present invention has been made in view of such circumstances, and an object of the present invention is to facilitate an operation for connecting a catheter to a drug solution injection port and to prevent the catheter from being twisted and a drug solution including the same. To provide an infusion port set.

In order to achieve the above-described object, the structural feature of the auxiliary tool according to the present invention is that the connecting tube protruding from the body of the drug solution injection port is covered with the end portion of the catheter, and the end portion of the catheter is connected. An auxiliary tool used to attach a catheter fixing member to the outer periphery of the end side portion of the catheter so as to be pressed against the outer peripheral surface of the tube, and has an outer peripheral side opening through which the catheter can be inserted from the outer peripheral side. An auxiliary tool body provided with an axial through groove that can be penetrated, and a pressing portion formed of a protrusion formed on the outer peripheral surface of the auxiliary tool main body, the pressing portion being a circumference of the outer peripheral surface of the auxiliary tool main body It is constituted by a substantially C-shaped flange formed along the direction, the axial through groove is formed in a substantially circular through hole, and its diameter is made larger than the width of the outer peripheral side opening .

  The auxiliary tool body of the auxiliary tool configured as described above is provided with an axial through groove that allows the catheter to be inserted from the outer peripheral side along the axial direction, and a pressing portion is formed on the outer peripheral surface of the auxiliary tool body. Yes. Therefore, the proximal end portion of the catheter passing through the inside of the catheter fixing member covers the connecting pipe of the drug solution injection port, and the distal end portion of the catheter is passed through the axial through groove of the auxiliary tool body from the catheter fixing member. Thus, the catheter fixing member can be moved to the outer peripheral side of the connecting tube via the catheter by pressing the pressing portion toward the chemical solution injection port.

  That is, according to the present invention, the drug solution injection port and the catheter can be simply operated by pressing each other without performing a complicated operation such as connecting the drug solution injection port and the catheter fixing member by screwing each other. And can be connected. At this time, since it is only necessary to press the catheter fixing member with the pressing portion of the auxiliary tool, the operation can be easily performed even in a small space, and the force pressing the pressing portion can be effectively transmitted to the catheter fixing member. And a reliable pressing operation is possible. Further, since the catheter is not twisted, the catheter is not damaged by twisting. The width of the outer peripheral opening is shorter than the outer diameter of the catheter fixing member, and longer than the outer diameter of the catheter or the thickness when the catheter is lightly crushed.

  Further, the auxiliary tool main body may be configured to be somewhat long with a predetermined length in the axial direction, or may be configured with a plate shape having a short axial length. In short, it is only necessary to have an axial through groove into which the catheter can be inserted from the outer peripheral side and a pressing portion for facilitating the operation of pressing the catheter fixing member. Further, as the catheter fixing member, it is preferable to use a member constituted by a fixing portion main body that presses the catheter toward the connecting tube side and a tube that covers the proximal end side portion of the catheter. According to this, it is possible to prevent the catheter from being bent.

Moreover, in the auxiliary tool which concerns on this invention, the press part is comprised by the substantially C-shaped collar part formed along the circumferential direction of the outer peripheral surface of an auxiliary tool main body. According to this, the pressing operation of the catheter fixing member by the auxiliary tool is further facilitated. For example, when the catheter is inserted into the axial through groove of the auxiliary tool body, if the auxiliary tool is brought closer to the catheter from above with the axial through groove facing downward, the pressing portion is Since it is formed along the outer peripheral surface, the pressing portion is not provided on the lower side on the axial opening side. For this reason, it does not occur that the lower part of the pressing part hits the incision part of the body and it becomes difficult to operate the auxiliary tool. In this case, the shape of the inner peripheral edge of the pressing portion is substantially C-shaped, but the shape of the outer peripheral edge can be various shapes such as a partially opened circle or a partially opened rectangle .

  Further, another structural feature of the auxiliary tool according to the present invention is that a tapered surface is formed on the inner peripheral surface of the axial through groove so that the inner diameter of the pressing side opening is larger than the inner side. is there. Usually, the portion of the catheter covering the connecting tube is swollen more than the other portions, and the catheter fixing member is moved to the swollen portion while being pressed by the auxiliary tool. For this reason, the inner side of the axial through-groove of the auxiliary tool body should be configured with a tapered surface having a smaller inner diameter on the inner side than the opening on the side pressing the catheter fixing member. Thus, when the auxiliary tool main body hits the connection portion between the catheter and the connecting tube, it is possible to prevent an excessive force from being applied to the catheter and prevent the catheter from being damaged.

  A feature of the configuration of the drug solution injection port set according to the present invention is that the drug solution injection port set includes any of the above-described auxiliary tools, a drug solution injection port, a catheter, and a catheter fixing member. According to this, the operation for connecting the catheter to the drug solution injection port is easy, and the drug solution injection port set which is not easily damaged because the catheter is not twisted can be obtained.

  Another structural feature of the drug solution injection port set according to the present invention is that the catheter fixing member includes an annular lock body and a tube having an outer diameter smaller than that of the lock body and connected to the lock body. It is to be configured. According to this, it is possible to prevent the catheter from being broken. In addition, since the outer diameter of the tube is smaller than the outer diameter of the lock body, the operation when pressing the catheter fixing member with the auxiliary tool becomes easy. For example, even when the shape of the auxiliary tool main body is a simple shape in which a cylindrical body is provided with an axial through groove having an opening on the outer peripheral side, the auxiliary tool main body is still in a state where a tube is placed inside the axial through groove. The catheter fixing member can be pressed at the end of the catheter.

It is the side view which showed the chemical | medical solution injection | pouring port set which concerns on one Embodiment of this invention. The chemical | medical solution injection | pouring port is shown, (a) is a top view, (b) is a side view. The catheter fixing member is shown, (a) is a side view, (b) is bb sectional drawing of (a). The auxiliary | assistant tool is shown, (a) is a front view, (b) is a side view, (c) is cc sectional drawing of (b). It is the side view which showed the state which connected the chemical | medical solution injection | pouring port and the catheter via the catheter fixing member. It is explanatory drawing which showed the state which detained the chemical | medical solution injection port and the catheter in the patient's body.

  Hereinafter, an auxiliary tool and a chemical solution injection port set according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a chemical injection port set 10 including an auxiliary tool 20 according to the embodiment. This chemical solution injection port set 10 includes a chemical solution injection port 11 and a catheter 12 used for supplying a chemical solution such as an anticancer agent or a nutritional agent into a vein (B2 or the like) of a patient A (see FIG. 6). The catheter fixing member 13 is attached to the connecting portion between the drug solution injection port 11 and the catheter 12 by using the auxiliary tool 20. The drug solution injection port 11 is placed subcutaneously in the vicinity of the vein in the patient A, and the catheter 12 is placed, for example, in the vein.

  As shown in FIG. 2, the chemical liquid injection port 11 includes a port main body 14 and a stem 15 as a connection pipe according to the present invention. The port body 14 has a thick plate shape on the surface of the substrate 14a in which the plane (FIG. 2 (a)) has a substantially elliptical shape, the side surface (FIG. 2 (b)) has a substantially trapezoidal shape, and a recess is formed in the center of the upper surface. The septum 14b is attached, and a space is formed in a portion surrounded by the substrate 14a and the septum 14b. The septum 14b is made of silicone rubber and has a property of being able to pierce a needle and closing the hole pierced by the needle when the needle is pulled out.

  For this reason, when the septum 14b of the port body 14 is stabbed with a needle of a syringe filled with a drug solution and the drug solution is injected into the port body 14 from the syringe, the drug solution is filled in the space in the port body 14. The substrate 14a can be made of polyacetal, polyethylene, polysulfone, polypropylene, or the like. The stem 15 is formed of a cylindrical body in which a liquid channel (not shown) communicating with the inside of the port body 14 is formed, and a diameter-enlarged portion 15a is formed at the tip of the outer peripheral surface.

  The outer diameter of the proximal end portion of the stem 15 is set to be the same as or slightly larger than the inner diameter of the catheter 12, and the maximum outer diameter of the enlarged diameter portion 15 a at the distal end of the stem 15 is set to be larger than the inner diameter of the catheter 12. Yes. For example, when the inner diameter of the catheter 12 is 1.5 mm, the outer diameter of the proximal end portion of the stem 15 is set to about 1.6 mm, and the maximum outer diameter of the enlarged diameter portion 15a is set to about 2.4 mm. For this reason, the proximal end of the catheter 12 (the end located on the side of the drug solution injection port 11 is the proximal end and the end inserted into the inside of the vein is the distal end) is directed to the stem 15 from the inside. When inserted, the catheter 12 can be connected to the stem 15 by the catheter 12 extending to the outer peripheral side at the enlarged diameter portion 15a.

  As shown in FIG. 3, the catheter fixing member 13 includes a lock main body 16 and an anti-kink tube 17 as a tube according to the present invention connected to the lock main body 16. The lock body 16 includes a cylindrical pressed portion 16a having a short axial length, an inner diameter that is the same as the pressed portion 16a, an outer diameter that is smaller than the pressed portion 16a, and an axial length that is a pressed portion. It is composed of an integral member in communication with a cylindrical connecting portion 16b longer than 16a. An engagement protrusion 18 that slightly protrudes toward the central axis side is formed on the connection portion 16b side portion of the pressed portion 16a on the inner peripheral surface of the fixing hole portion 16c formed inside the lock body 16. It is formed along the circumference.

  Further, the outer peripheral surface of the connecting portion 16b is formed with a tapered surface that gradually increases in diameter as it goes from the distal end to the proximal end side, and a straight surface that has the same diameter surface that is smaller in diameter than the proximal end portion of the tapered surface. A step portion 18a is formed at the boundary between the tapered surface and the straight surface. The stem 15 with the catheter 12 covering the outer peripheral surface can be pushed into the inside of the fixing hole 16c, and at this time, the enlarged diameter portion 15a of the stem 15 is engaged beyond the engaging protrusion 18. The lock body 16 engages with the protrusion 18 and comes to be located at a position close to the port body 14.

  Moreover, the anti-kink tube 17 is comprised with the protection tube which can penetrate the base end side part of the catheter 12 inside. The anti-kink tube 17 is fixed to the lock main body 16 in a state where the connection portion 16b is covered with the base end side portion. At this time, the base end portion of the anti-kink tube 17 covering the straight surface on the base end side of the connection portion 16b is fixed by tightening the step portion 18a. As a result, the anti-kink tube 17 is prevented from coming off from the connecting portion 16b. Further, a bulging portion 17 a that swells along the tapered surface of the connecting portion 16 b is formed in a portion of the anti-kink tube 17 that covers the tapered surface of the connecting portion 16 b.

  As shown in FIG. 4, the auxiliary tool 20 includes a substantially cylindrical auxiliary tool main body 21 having a part of the peripheral surface opened, and a hook-shaped pressing portion 22. The auxiliary tool body 21 is formed in a shape in which an axial through groove 23 that communicates from the outer peripheral portion of the cylindrical body to the space on the center side is provided along the axial direction. That is, the axial through groove 23 is configured by a groove portion that penetrates in the axial direction of the auxiliary tool body 21 and includes an outer peripheral side opening 23 a that is open to the outer peripheral side of the auxiliary tool body 21. The width of the outer peripheral opening 23 a is set wider than the outer diameter of the catheter 12. Further, the width of the outer peripheral side opening 23 a is set to be slightly larger than the outer diameter of the anti-kink tube 17 of the catheter fixing member 13.

  And the part by the side of the center axis | shaft of the auxiliary tool main body 21 in the axial direction penetration groove 23 is formed in the substantially circular through-hole connected to an opening part, The diameter becomes larger than the width | variety of the outer peripheral side opening 23a. ing. In addition, the tip side portion of the axial through groove 23 has a smaller inner diameter than the base end side, and the tip side portion is constituted by a straight surface portion 23c having the same diameter as a whole. The anti-kink tube 17 can be accommodated in the straight surface portion 23c.

  Further, the base end side portion of the axial through groove 23 is constituted by a tapered surface portion 23b whose diameter gradually increases from the front end side toward the base end side (base end opening). The tapered surface portion 23 b of the axial through groove 23 is formed in a shape that can accommodate the bulging portion 17 a of the anti-kink tube 17. The pressing portion 22 is provided on the base end side outer periphery of the assisting device main body 21, and a circular plate having a hole formed in the center is cut into a straight line at a portion corresponding to the outer peripheral side opening 23a and is substantially C-shaped. It is formed in the shape of a bowl. That is, the straight portion of the pressing portion 22 is formed so as to be orthogonal to a virtual line extending from the center of the axial through groove 23 to the center of the outer peripheral side opening 23a in the width direction.

  For this reason, first, the stem 15 is covered with the proximal end portion of the catheter 12 penetrating the inside of the catheter fixing member 13, and the distal end portion of the catheter 12 is placed in the axial through groove 23 of the auxiliary tool 20 with respect to the catheter fixing member 13. Put in. In this state, the lock body 16 is pressed toward the drug solution injection port 11 by the pressing portion 22, thereby moving the auxiliary tool 20 toward the catheter fixing member 13 along the catheter 12. 12 can be fixed to the stem 15. In this case, by pressing the pressed portion 16 a of the lock main body 16 with the pressing portion 22, the lock main body 16 gets over the portion corresponding to the enlarged diameter portion 15 a of the stem 15. Further, since the tapered surface portion 23b of the axial through groove 23 is formed to have a tapered surface whose opening side is wider than the back side, the bulging portion 17a of the anti-kink tube 17 is connected to the lock body 16 with an unreasonable force. It is not pressed against the part 16b.

  As a result, the catheter 12 is fixed to the stem 15 by the catheter fixing member 13 in a good state as shown in FIG. The lock body 16 and the stem 15 can be made of a metal such as titanium or a titanium alloy, or a plastic such as polypropylene. Moreover, the catheter 12 and the anti-kink tube 17 can be comprised with the tubular body which consists of resin, such as a polyurethane and silicone. The catheter 12 is made of a soft material, and the anti-kink tube 17 is made of the same material as the catheter 12 or a slightly hard material.

  In this configuration, when a drug solution is supplied into the vein of the patient A using the drug solution injection port 11 and the catheter 12 connected via the catheter fixing member 13, the tip is first inserted into the vein. The proximal end portion of the catheter 12 is passed through the inside of the catheter fixing member 13. Next, the stem 15 of the drug solution injection port 11 is connected to the proximal end portion of the catheter 12. Then, the catheter fixing member 13 is engaged with the stem 15 via the catheter 12. In the operation in this case, first, the catheter fixing member 13 attached to the outer periphery of the catheter 12 is moved to the drug injection port 11 side, and the lock body 16 is brought close to the stem 15.

  In this state, the catheter 12 is put into the axial through groove 23 from the outer peripheral side opening 23 a of the auxiliary tool 20. Then, the auxiliary tool 20 is moved to the catheter fixing member 13 side along the catheter 12 and the lock main body 16 of the catheter fixing member 13 is pressed to the drug solution injection port 11 side by the pressing portion 22 to engage the lock main body 16. The mating protrusion 18 is pushed in until it exceeds the diameter-enlarged portion 15 a of the stem 15. As a result, the catheter 12 is firmly connected to the stem 15, and the space in the port main body 14 communicates with the liquid flow path in the catheter 12 via the liquid flow path in the stem 15. When the connection operation between the catheter 12 and the stem 15 is completed, the auxiliary tool 20 is removed from the catheter 12.

  In this case, the catheter 12 is inserted into the vein from the chest C of the patient A, for example, as shown in FIG. That is, a vein in the chest C, for example, the vicinity of the subclavian vein B1 is incised, the catheter 12 is inserted from the subclavian vein B1 located in the vicinity thereof, and the distal end portion thereof reaches the superior vena cava B2. The drug solution injection port 11 connected to the proximal end portion of the catheter 12 is buried under the chest. In this case, the anti-kink tube 17 prevents the catheter 12 from bending, and the catheter 12 is not pressed against the opening edge of the lock body 16.

  Therefore, the liquid flow path of the catheter 12 maintains a state where it is communicated in an appropriate state. When supplying the drug solution into the vein of the patient A, first, the needle of the syringe filled with the drug solution is pierced from the skin surface to penetrate the septum 14 b and the tip of the needle is positioned inside the port body 14. And a chemical | medical solution is inject | poured in the port main body 14 from a syringe. As a result, the drug solution passes from the inside of the port body 14 through the inside of the catheter 12 and enters the superior vena cava B2.

  Thus, the auxiliary tool 20 of the drug solution injection port set 10 according to the present embodiment includes the auxiliary tool main body 21 and the hook-shaped pressing portion 22, and the catheter 12 is disposed on the outer peripheral side of the auxiliary tool main body 21. An axial through groove 23 that can be inserted through is provided. Therefore, with the catheter 12 being passed through the catheter fixing member 13, the proximal end portion of the catheter 12 covers the stem 15 of the drug solution injection port 11, and the catheter 12 is inserted into the axial through groove 23 of the auxiliary tool body 21. The catheter 12 can be fixed to the stem 15 by a simple operation of simply pressing the lock body 16 toward the liquid injection port 11 with the pressing portion 22.

  In this case, since only the operation of pressing the lock main body 16 of the catheter fixing member 13 with the pressing portion 22 is required, the operation can be easily performed even in a small space, and the catheter 12 is not twisted. 12 is not damaged. Further, since the pressing portion 22 is formed in a bowl shape with the lower edge portion being linear, the pressing operation is facilitated. That is, the pressing portion 22 has an area where the finger can be easily applied, and the lower edge portion of the pressing portion 22 does not hit the incision portion of the body and the operation of the auxiliary tool 20 does not become difficult.

  Further, the tapered surface portion 23 b is provided on the proximal end side of the axial through groove 23, and the anti-kink tube 17 is provided on the catheter fixing member 13. For this reason, an unreasonable force is not applied to the catheter 12, and it is possible to prevent the catheter 12 from being bent or the catheter 12 from being damaged.

  Further, the auxiliary tool according to the present invention and the chemical liquid injection port set including the auxiliary tool are not limited to the above-described embodiments, and can be implemented with appropriate modifications. For example, in the above-described embodiment, the auxiliary tool main body 21 is configured to be long in the axial direction, but the auxiliary tool main body 21 may be configured only by an axially short one, for example, the inner peripheral side portion of the pressing portion 22. Good. Further, the catheter fixing member 13 can be configured only by the lock main body 16 or the pressed portion 16 a of the lock main body 16. In this case, the auxiliary tool body 21 of the auxiliary tool 20 can be made slightly smaller.

  Further, when the catheter fixing member 13 is configured only by the pressed portion 16a, when the auxiliary tool 20 is used, the connection portion between the proximal end portion of the catheter 12 and the stem 15 is located in the tapered surface portion 23b. Thus, the catheter 12 is prevented from being damaged by applying an excessive force to the catheter 12. Further, in the above-described embodiment, the catheter 12 to which the drug solution injection port 11 is connected is placed in a vein, but the catheter 12 to which the drug solution injection port 11 is connected is inserted into the artery using a predetermined method. It can also be detained. Moreover, it can change suitably also about the material of each member which comprises the auxiliary tool and chemical | medical solution injection | pouring port set which concern on this invention.

  DESCRIPTION OF SYMBOLS 10 ... Chemical injection port set, 11 ... Chemical injection port, 12 ... Catheter, 13 ... Catheter fixing member, 15 ... Stem, 16 ... Lock body, 17 ... Anti-kink tube, 20 ... Auxiliary tool, 21 ... Auxiliary tool main body, 22 ... Pressing part, 23 ... Axial through groove, 23a ... Outer peripheral side opening, 23b ... Tapered surface part.

Claims (4)

The connecting tube protruding from the body of the drug solution injection port is covered with the end portion of the catheter, and the end portion of the catheter is pressed against the outer peripheral surface of the connecting tube, so that the outer periphery of the end portion of the catheter is An auxiliary tool used when attaching the catheter fixing member to
From an auxiliary tool main body provided with an outer peripheral side opening through which the catheter can be inserted from the outer peripheral side and provided with an axial through groove through which the catheter can be penetrated, and a protrusion formed on the outer peripheral surface of the auxiliary tool main body Comprising a pressing part,
The pressing portion is constituted by a substantially C-shaped collar portion formed along the circumferential direction of the outer peripheral surface of the auxiliary tool body ,
The auxiliary tool characterized in that the axial through groove is formed in a substantially circular through hole, and the diameter thereof is larger than the width of the outer peripheral side opening . The assisting tool according to claim 1, wherein a taper surface having an inner diameter larger at the pressing side opening than at the back side is formed on an inner peripheral surface of the axial through groove. A drug solution injection port set comprising the auxiliary device according to claim 1 , the drug solution injection port, the catheter, and the catheter fixing member. The medicinal solution injection port set according to claim 3, wherein the catheter fixing member includes an annular lock body and a tube that is connected in communication with the lock body and has a smaller outer diameter than the lock body.

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