JP2021119963A - Medical connector and catheter - Google Patents

Abstract

To provide a medical connector which can surely fix a medical long-length body without scratching or collapsing a surface of the medical long-length body, and a catheter.SOLUTION: A medical connector 20 has a cylindrical body 30 having a lumen 34 extending in a long-axis direction between a tip and a base end, and allowing the insertion of the medical long-length body 100 into the lumen 34, and a balloon 40 arranged in the lumen 34, and expandable in a direction orthogonal to a long-axis direction by the injection of fluid. The balloon 40 grips the medical long-length body 100 by being expanded in a state that the medical long-length body 100 is inserted into the lumen 34.SELECTED DRAWING: Figure 4

Description

The present invention relates to a medical connector and a catheter comprising a medical connector.

In endovascular treatment, a long medical body such as a catheter or a guide wire is inserted into a living body to diagnose and treat a lesion generated in the blood vessel.

When diagnosing or treating a lesion in a blood vessel, the operator may want to maintain a medical long body such as a catheter or a guide wire at a predetermined position in the blood vessel. In addition, the operator may want to operate the catheter and the guide wire integrally in the blood vessel while maintaining the positional relationship between the catheter and the guide wire. In such a case, if the movement of the guide wire with respect to the catheter in the long axis direction can be restricted, the procedure can proceed smoothly.

Therefore, Patent Document 1 proposes an auxiliary tool for holding a medical long body such as a guide wire. This auxiliary tool presses the holding portion against the inner wall of the main body from the side of the tubular main body, and holds the medical long body sandwiched between the inner wall of the main body and the holding portion.

Japanese Unexamined Patent Publication No. 2014-039613

When the medical long body is held by the holder described in Patent Document 1, the medical long body is pressed against the inner wall of the main body, so that the surface of the medical long body may be damaged or crushed. There is sex.

The present invention has been made to solve the above-mentioned problems, and provides a medical connector and a catheter capable of reliably gripping a medical long body without damaging or crushing the surface of the medical long body. The purpose is to provide.

The medical connector according to the present invention configured as described above has a lumen extending in the long axis direction between the tip and the proximal end, and a long medical body can be inserted into the lumen. It has a body and a balloon that is arranged in the lumen and can be inflated in a direction orthogonal to the long axis direction by injecting fluid, and the balloon has the medical elongated body inserted into the lumen. It is characterized in that the medical long body is gripped by expanding in the state of being bent.

A catheter according to the present invention that achieves the above object is characterized in that the medical connector is provided as a hub, and a tubular body is connected to the tip of the connector.

In the medical connector according to the present invention configured as described above, the inflated balloon and the outer surface of the medical elongated body are in close contact with each other in the lumen of the tubular body. Thereby, the medical connector can restrict the movement of the medical elongated body with respect to the medical connector. In addition, the balloon deforms according to the shape of the medical long body when inflated. Therefore, the medical connector can reliably grip the medical long body without damaging or crushing the surface of the medical long body.

In the catheter according to the present invention configured as described above, since the medical connector constitutes a part of the catheter, it is not necessary to connect or disconnect the medical connector to or from the catheter, and the workability of the operator is improved. improves.

The tubular body may have side holes on the inner wall surface of the lumen for injecting and discharging fluid into the balloon. By having a side hole in the inner wall surface of the lumen, the medical connector allows the injection or discharge of fluid for expanding / contracting the balloon arranged in the lumen of the tubular body in the lateral direction of the medical connector. It can be done from (diameter direction). As a result, the member for injecting the fluid into the side hole is less likely to interfere with other medical devices connected to the base end of the tubular body or a medical long body inserted into the lumen of the tubular body. .. Therefore, the operator can easily perform the operation of expanding and contracting the balloon while the medical long body is inserted into the lumen of the tubular body.

At least two balloons may be arranged in the lumen of the tubular body so as to face each other in the radial direction orthogonal to the long axis direction. By arranging the balloon so as to sandwich the medical elongated body inserted into the lumen, the balloon can reliably grip the medical elongated body in the lumen of the tubular body.

At least two balloons may be arranged, and the flow paths for supplying fluid to each balloon may be connected. As a result, at least two balloons are inflated at the same time because the internal pressures at the time of expansion are equal. Therefore, at least two balloons can reliably grip the medical long body inserted into the lumen near the center of the lumen of the tubular body.

The balloon may be formed of a membrane fixed in the lumen of the tubular body. This makes it difficult for the balloon to shift in the lumen. When the balloon is contracted, the membrane forming the balloon can be positioned so as to stick to the inner wall surface of the inner wall, so that it does not easily affect the operation of inserting and removing the medical long body. Further, since the membrane can be easily fixed to the inner wall surface of the lumen of the tubular body by means such as adhesion or fusion, the production is easy.

The tubular body has a first connection portion arranged at the tip and connectable to another medical device, a second connection portion arranged at the base end and connectable to another medical device, and the first connection portion. The balloon may be arranged in the intermediate portion, having an intermediate portion arranged between the connecting portion of the above and the second connecting portion. Since the balloon is arranged on the tip side of the second connecting portion, the medical device does not interfere with the balloon when connecting another medical device to the second connecting portion. Therefore, even if another medical device is connected to the second connection portion, the balloon is unlikely to be damaged. In addition, the balloon can be expanded and contracted while another medical device is connected to the second connecting portion.

It is a top view which shows the catheter which has the medical connector which concerns on embodiment. It is a figure which shows the base end part of a catheter, (A) is a cross-sectional view, (B) is a cross-sectional view along the line AA of FIG. 2 (A). 2 is a cross-sectional view taken along the line BB of FIG. 2 (A). It is a figure which shows the state which held the medical long body inserted through the lumen with a balloon, (A) is the cross-sectional view, (B) is the cross-sectional view along line CC of FIG. 4 (A). .. It is sectional drawing which shows the 1st modification of the medical connector. It is sectional drawing which shows the 2nd modification of the medical connector. It is a top view which shows the 3rd modification of the medical connector. It is sectional drawing which shows the 3rd modification of the medical connector. It is sectional drawing which shows the 4th modification of the medical connector. It is sectional drawing which shows the 5th modification of the medical connector.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The dimensions of the drawings may be exaggerated and differ from the actual dimensions for convenience of explanation, and the components having substantially the same functions in the present specification and the drawings have the same reference numerals. The duplicate description is omitted by adding. In the present specification, the side connecting the long medical device inserted into the blood vessel is referred to as the "tip side", and the side operated by the operator is referred to as the "base end side".

As shown in FIG. 1, the medical connector 20 according to the present embodiment is provided on the catheter 10 as a hub. The catheter 10 is not particularly limited, and includes, for example, a microcatheter, a guiding catheter, an angiography catheter, a balloon catheter, a support catheter, and the like.

As shown in FIGS. 1 to 3, the catheter 10 has a medical connector 20 which is a hub, a tubular body 70 connected to the tip of the medical connector 20, and a kink-resistant protector 80.

The tubular body 70 is elongated and has flexibility. The tubular body 70 has a catheter lumen 71 extending from the proximal end to the distal end formed at a substantially central portion thereof.

The tubular body 70 includes an inner layer forming an inner surface, an outer layer forming an outer surface, and a reinforcing body located between the inner layer and the outer layer. The tubular body 70 may be provided with a tip tip or a contrast marker at the cutting edge.

The material forming the outer layer of the tubular body 70 is preferably a resin. Resins include, for example, various thermoplastic elastomers such as styrene-based, polyolefin-based, polyurethane-based, polyester-based, polyamide-based, polybutadiene-based, transpolyisoprene-based, fluororubber-based, and chlorinated polyethylene-based, polyetherketone, and polyimide-based resins. However, one or a combination of two or more of these (polymer alloy, polymer blend, laminate, etc.) and the like can be mentioned. Further, the tubular body 70 may contain an X-ray contrast-enhancing material.

The material forming the inner layer of the tubular body 70 is preferably a low friction material so that a guide wire, another catheter, or the like can be easily inserted into the catheter lumen 71. The low friction material is, for example, a fluorine-based resin material such as polytetrafluoroethylene (PTFE).

The reinforcing body reinforces the tubular body 70. The reinforcing body is formed by winding a wire rod around the outer surface of the inner layer in a coil shape or braiding it in a mesh shape. As the material for forming the reinforcing body, for example, a metal material such as tungsten, stainless steel, and NiTi alloy is suitable.

The kink-resistant protector 80 is made of an elastic material. The kink-resistant protector 80 covers the portion where the tubular body 70 and the medical connector 20 are connected. As a result, the kink-resistant protector 80 prevents the tubular body 70 from bending or kinking in the vicinity of the connection portion between the tubular body 70 and the medical connector 20. Examples of the material for forming the kink-resistant protector 80 include materials applicable to the tubular body 70 described above.

The medical connector 20 includes a tubular body 30, a balloon 40, an injection port 50, and a connecting member 60.

The tubular body 30 is formed by two layers, an inner layer 31 and an outer layer 32. The inner layer 31 and the outer layer 32 have a tubular shape, and the tip of the inner layer 31 and the tip of the outer layer 32, and the base end of the inner layer 31 and the base end of the outer layer 32 are fixed, respectively. The outer layer 32 surrounds the inner layer 31. Between the inner layer 31 and the outer layer 32, a passage 33 sandwiched between the outer surface of the inner layer 31 and the inner surface of the outer layer 32 is formed. The inner surface of the inner layer 31 forms the inner wall surface of the lumen 34 extending in the longitudinal direction between the tip and the proximal end. The lumen 34 communicates with the catheter lumen 71. The inner layer 31 includes a side hole 35 that penetrates the inner layer 31 and communicates the passage 33 and the lumen 34. The side hole 35 is a hole for injecting and discharging a fluid into the balloon 40. Two side holes 35 are provided so as to face each other in the radial direction orthogonal to the major axis direction.

The tubular body 30 includes a first connecting portion 36, a second connecting portion 37, and an intermediate portion 38. The first connecting portion 36 is arranged at the tip of the tubular body 30 and is connected to the tubular body 70 (another medical device).

The outer surface of the base end portion of the tubular body 70 that enters from the tip end side of the tubular body 30 is fixed to the inner surface of the first connecting portion 36. The second connecting portion 37 is an opening arranged at the base end of the tubular body 30. A female luer taper is formed on the inner surface of the second connecting portion 37. Therefore, the tubular body 30 can be connected to other medical devices such as a syringe having a male luer taper, a Y connector, and a three-way stopcock by the second connecting portion 37.

The intermediate portion 38 is arranged between the first connecting portion 36 and the second connecting portion 37. The intermediate portion 38 includes a wing portion 39 and a connection hole 33A. The above-mentioned side hole 35 is located in the intermediate portion 38. The wing 39 is used by the operator to operate and hold the catheter 10 with his fingers. The wing portion 39 is formed so as to project radially outward from the outer surface of the intermediate portion 38. Two blade portions 39 are provided so as to face each other in the radial direction. The connection hole 33A is a hole that penetrates the outer layer 32. The connection hole 33A communicates with the passage 33. An injection port 50 for injecting / discharging a fluid for expanding / contracting the balloon 40 into the passage 33 is connected to the connection hole 33A. In the present embodiment, the flow path for supplying the fluid to the balloon 40 is formed by the injection port 50, the passage 33, and the side hole 35. Therefore, the flow paths for supplying the fluid to each balloon 40 are connected by the passage 33.

The material for forming the tubular body 30 is not particularly limited, and examples thereof include thermoplastic resins such as polycarbonate, polyamide, polysulfone, polyarylate, and methacrylate-butylene-styrene copolymer. The material forming the tubular body 30 is preferably transparent or translucent. As a result, the surgeon can easily confirm the state of the medical long body 100 and the balloon 40 inserted inside the medical connector 20 and the air bubbles remaining inside the medical connector 20.

The balloon 40 is a member that expands when a fluid flows in. The balloon 40 is arranged in the lumen 34 of the tubular body 30, and can be inflated radially inward from the inner wall surface of the lumen 34 by injecting a fluid. The balloon 40 is a film that covers the side hole 35 formed in the inner wall surface of the lumen 34 of the tubular body 30, and the edge portion 41 is fixed to the inner wall surface of the lumen 34 by adhesion, fusion, or the like. .. As an example, the balloon 40 is adhered to the inner wall surface of the lumen 34 by attaching the balloon 40 coated with the ultraviolet curing adhesive to the inner wall surface of the lumen 34 and irradiating with ultraviolet rays. The balloon 40 is positioned so as to stick to the inner wall surface of the lumen 34 in the contracted state. Therefore, the balloon 40 does not easily affect the operation of inserting and removing the medical long body 100 inserted into the lumen 34. The balloon 40 is arranged in the intermediate portion 38 of the tubular body 30. The edge 41 of the balloon 40 is provided on the distal end side of the second connecting portion 37 of the tubular body. As a result, the balloon 40 does not interfere with other medical devices connected to the female luer taper of the second connecting portion 37 of the tubular body 30. Two balloons 40 are arranged in the lumen 34 of the tubular body 30 so as to face each other at the same position along the long axis direction and in the radial direction. The two balloons 40 facing each other can be inflated into substantially the same shape. Therefore, the two balloons 40 facing each other expand so as to substantially close the lumen 34. The number of balloons 40 is not limited, and may be, for example, one or three or more. Therefore, three or more balloons 40 may be arranged side by side in the circumferential direction on the inner wall surface of the lumen 34. The material forming the balloon 40 is an elastic material such as natural rubber, synthetic rubber, and nylon-based thermoplastic elastomer.

The injection port 50 circulates the fluid to be injected into the balloon 40. The injection port 50 includes a flexible tube 51 and a port connector 52. One end of the tube 51 is connected to the connection hole 33A, and the other end is connected to the port connector 52. Therefore, the injection port 50 is located in the intermediate portion 38 of the tubular body 30. Therefore, the tube 51 and the port connector 52 constituting the injection port 50 are inserted into another medical device connected to the second connection portion 37 of the tubular body 30 or the lumen 34 of the tubular body 30. It does not easily interfere with the medical long body 100.

The port connector 52 preferably has a structure capable of preventing backflow. The port connector 52 is, for example, a three-way stopcock. The port connector 52 can be connected to a syringe or the like that supplies a fluid. The port connector 52 is not limited to a three-way stopcock, and may be, for example, a connector having a valve body or a connector having no valve body.

The tube 51 has a strength that does not burst even at the pressure required to inflate the balloon 40. The material forming the tube 51 is, for example, vinyl chloride, polybutadiene, silicone rubber, or the like.

The fluid for inflating the balloon 40 is, for example, a physiological saline solution, a contrast medium, air, or the like. The syringe for supplying the fluid to the balloon 40 is preferably provided with the catheter 10. The volume of the syringe is approximately equal to the amount required for the balloon 40 to substantially close the lumen 34 of the tubular body 30. As a result, it is possible to prevent the balloon 40 from being supplied with more fluid than necessary for substantially closing the lumen 34 of the tubular body 30, so that the balloon 40 and the tube 51 can be prevented from rupturing.

The connecting member 60 is a member that connects the injection port 50 to the kink-resistant protector 80. The connecting member 60 includes a first fitting groove 61 into which the injection port 50 is fitted, and a second fitting groove 62 into which the kink-resistant protector 80 is fitted. The connecting member 60 can maintain members such as the tube 51 and the port connector 52 constituting the injection port 50 at positions along the catheter 10 when the fluid injection operation into the balloon 40 is not performed. Therefore, the connecting member 60 can prevent the injection port 50 from interfering with the operator's catheter operation. The connecting member 60 may be connected to the tubular body 30 or the tubular body 70 instead of the kink-resistant protector 80.

Next, the operation and effect of the catheter 10 provided with the medical connector 20 according to the present embodiment will be described.

When the surgeon wants to restrict the movement of the medical elongated body 100 inserted into the catheter 10 with respect to the tubular body 30 during the procedure, the injection port 50 is removed from the connecting member 60, and the fluid is contained in the port connector 52. Connect the syringe. The surgeon then injects the fluid in the syringe into the port connector 52. The fluid flows into the passage 33 of the tubular body 30 through the tube 51 and the connection hole 33A. The fluid flowing into the passage 33 flows into the inside of the two balloons 40 through the two side holes 35. The liquid flowing into the balloon 40 inflates the balloon 40 as shown in FIG. The two opposing balloons 40 inflate so as to substantially close the lumen 34 of the tubular body 30. Since the two balloons 40 inflate into substantially the same shape, they come into close contact with the outer surface of the medical oblong body 100 at substantially the center of the lumen 34. By sandwiching the medical long body 100 between the two opposing balloons 40, the movement of the medical long body 100 with respect to the tubular body 30 can be reliably restricted. After this, the operator closes the three-way stopcock of the port connector 52. As a result, the inflated state of the balloon 40 is maintained, and the state in which the movement of the medical long body 100 is restricted with respect to the tubular body 30 can be satisfactorily maintained. In addition, the operator can easily operate the catheter 10 and the medical long body 100 integrally. When it is desired to move the medical long body 100 with respect to the tubular body 30, the operator opens the three-way stopcock of the port connector 52 and sucks the fluid with a syringe. As a result, the fluid in the balloon 40 is discharged to the syringe through the side hole 35, the passage 33, the connection hole 33A, and the injection port 50. As a result, the balloon 40 contracts, and the medical long body 100 can be moved with respect to the tubular body 30. Since the contact area between the balloon 40 and the surface of the medical long body 100 can be adjusted by the amount of fluid injected into the balloon 40, the tubular body 30 can grip the medical long body 100 by the balloon 40. The degree can be controlled.

As described above, the medical connector 20 according to the first embodiment has a lumen 34 extending in the longitudinal direction between the tip end and the proximal end, and the medical elongate body 100 is provided in the lumen 34. The balloon 40 has a tubular body 30 through which the body can be inserted, and a balloon 40 which is arranged in the lumen 34 and can be inflated in a direction orthogonal to the long axis direction by injecting fluid. The balloon 40 is medically used in the lumen 34. The medical long body 100 is gripped by expanding with the long body 100 inserted.

In the medical connector 20 configured as described above, the inflated balloon 40 and the outer surface of the medical elongated body 100 are in close contact with each other in the lumen 34 of the tubular body 30. Thereby, the medical connector 20 can limit the movement of the medical long body 100 with respect to the tubular body 30. As a result, the operator can maintain the position of the medical long body 100 inserted into the tubular body 30 in the living body. Alternatively, the surgeon can maintain the position of the medical oblong body 100 inserted through the tubular body 30 with respect to the tubular body 70 (or other medical device) connected to the medical connector 20. Further, the balloon 40 deforms according to the shape of the medical long body 100 when inflated. Therefore, the balloon 40 ensures the medical long body 100 without damaging the surface of the medical long body 100 or crushing the lumen of the hollow medical long body 100 such as a catheter. Can be gripped. Further, since the medical connector 20 can adjust the contact area between the balloon 40 and the surface of the medical long body 100 by the amount of fluid injected into the balloon 40, the balloon 40 can grip the medical long body 100. The degree can be controlled.

Further, the tubular body 30 has a side hole 35 on the inner wall surface of the lumen 34 for injecting and discharging a fluid into the balloon 40. By having the side hole 35 on the inner wall surface of the lumen 34, the medical connector 20 injects or discharges a fluid for expanding / contracting the balloon 40 arranged in the lumen 34 of the tubular body 30. This can be done from the side hole 35 on the inner wall surface. As a result, members such as the injection port 50, the tube 51, and the port connector 52 for injecting the fluid into the side hole 35 are connected to the second connection portion 37 of the tubular body 30 and other medical instruments and cylinders. It is unlikely to interfere with the medical long body 100 inserted into the lumen 34 of the body 30. Therefore, the operator can easily perform the operation of expanding / contracting the balloon 40 while the medical long body 100 is inserted into the lumen 34 of the tubular body 30.

Further, at least two balloons 40 are arranged in the lumen 34 of the tubular body 30 so as to face each other in the radial direction orthogonal to the long axis direction. By arranging the balloon 40 so as to sandwich the medical elongated body 100 to be inserted into the lumen 34, the balloon 40 can reliably grip the medical elongated body 100 in the lumen 34 of the tubular body 30.

Further, at least two balloons 40 are arranged, and the flow paths for supplying the fluid to each balloon 40 are connected. As a result, at least two balloons 40 are inflated at the same time because the internal pressures at the time of expansion are equal. Therefore, at least two balloons 40 can reliably grip the medical long body 100 inserted into the lumen 34 near the center of the lumen 34 of the tubular body 30.

Further, the balloon 40 is formed of a film fixed to the lumen 34 of the tubular body 30. As a result, the balloon 40 is less likely to be displaced in the lumen 34. When the balloon 40 is contracted, the membrane forming the balloon 40 can be positioned so as to stick to the inner wall surface of the lumen 34, so that it does not easily affect the operation of inserting and removing the medical elongated body 100. Further, since the film can be easily fixed to the inner wall surface of the lumen 34 of the tubular body 30 by means such as adhesion or fusion, the production is easy.

Further, the tubular body 30 has a first connecting portion 36 which is arranged at the tip and can be connected to another medical device, and a second connecting portion 37 which is arranged at the base end and can be connected to another medical device. , An intermediate portion 38 arranged between the first connecting portion 36 and the second connecting portion 37, and the balloon 40 is arranged in the intermediate portion 38. As a result, when another medical device (for example, a medical device for priming) is connected to the second connecting portion 37, the medical device does not interfere with the balloon 40. Therefore, even if another medical device is connected to the second connecting portion 37, the balloon 40 is unlikely to be damaged. Further, the balloon 40 can be expanded and contracted while another medical device is connected to the second connecting portion 37.

Further, the catheter 10 includes a medical connector 20 as a hub, and a tubular body 70 is connected to the tip of the medical connector 20. Since the medical connector 20 forms a part of the catheter 10, the work of connecting and disconnecting the medical connector 20 to and from the catheter 10 is unnecessary, and the workability of the operator is improved.

When the catheter 10 is a microcatheter, the balloon 40 allows the balloon 40 to grip the guide wire, which is the medical elongated body 100, with the hub (medical connector 20) of the catheter 10. As a result, the operator can maintain the position of the guide wire (medical long body 100) inserted in the living body well. Further, when the operator passes the catheter 10 and the guide wire (medical long body 100) through the constricted portion, the operator grips the guide wire (medical long body 100) with the hub of the catheter 10 by the balloon 40. Then, the catheter 10 and the guide wire (medical long body 100) can be operated integrally.

When the catheter 10 is a guiding catheter, the balloon 40 grips not only the guide wire but also a catheter (for example, a microcatheter or a balloon catheter) inserted into the guiding catheter as a medical long body 100. can.

When the catheter 10 is a guiding catheter and the medical elongated body 100 is a microcatheter, the operator may replace the guide wire inserted into the microcatheter while keeping the microcatheter in the periphery of the living body. It will be easy. Also, for example, when changing from an antegrade procedure to a retrograde procedure, the surgeon maintains the position of the microcatheter used in the antegrade procedure in vivo and is retrograde. Can perform the procedure.

When the catheter 10 is a guiding catheter and the medical elongated body 100 is a balloon catheter or a stent indwelling catheter, the position for expanding the balloon or the stent is a position for expanding the medical elongated body 100 for the balloon catheter or the stent indwelling. The catheter can be fixed. As a result, the balloon or the stent can be prevented from being misaligned during expansion.

The present invention is not limited to the above-described embodiment, and various modifications can be made by those skilled in the art within the technical idea of the present invention. For example, as in the first modification shown in FIG. 5, two or more balloons 40 may be provided side by side in the long axis direction of the medical connector 20. As a result, the medical connector 20 increases the contact area between the plurality of balloons 40 in the long axis direction and the medical long body 100, so that the medical long body 100 can be reliably gripped.

Further, as in the second modification shown in FIG. 6, the injection port 50 is not formed by the flexible tube 51 and the port connector 52, but is a hard member connected to the tubular body 30. May be good. In this case, the rigid member has a structure to which a syringe for supplying the fluid to be injected into the balloon 40, a three-way stopcock capable of preventing backflow of the fluid, a connector having a valve body, or the like can be connected to the side not connected to the tubular body 30. May be provided.

Further, as in the third modification shown in FIGS. 7 and 8, the tubular body 30 does not have to have a two-layer structure. In this case, the tube 51 is branched between the port connector 52 and the connection hole 33A, and the branched tube 51 is connected to each of the plurality of side holes 35 for injecting and discharging the fluid into the balloon 40. The flow paths of the tubes 51 that supply fluid to each balloon 40 are connected. As a result, the medical connector 20 can expand and contract the plurality of balloons 40 at the same time even if the tubular body 30 does not have a two-layer structure and the passages 33 communicating with the plurality of side holes 35 are not provided.

Further, as in the fourth modification shown in FIG. 9, the balloon 40 may have a bag shape instead of a film fixed to the inner wall surface of the tubular body 30. The plurality of tubes 51 extending and branching from the port connector 52 penetrate the wall of the tubular body 30 and are directly fixed to the respective balloons 40. The flow paths of the tubes 51 that supply fluid to each balloon 40 are connected. As a result, the plurality of balloons 40 can directly inject and discharge the fluid from the injection port 50, and can be expanded and contracted at the same time. Therefore, the tubular body 30 does not have to have a two-layer structure.

Further, as in the fifth modification shown in FIG. 10, the medical connector 20 does not have to be connected to the tubular body 70 and the kink-resistant protector 80 instead of the hub of the catheter 10. The medical connector 20 may be provided with a connection connector 90 and an O-ring 91 that can be connected to a hub at the base end of another medical device (for example, a catheter) at the first connection portion 36.

The connector 90 is a tubular member that is liquid-tightly connected to the hub of another medical device. The connector 90 is rotatably arranged and includes a male luer taper portion 92 and a spiral groove 93. The male luer taper portion 92 can enter the hub of the medical device, adhere to the inner surface of the hub, and be liquidtightly connected. The spiral groove 93 can be screwed into a protrusion provided on the outer surface of the hub of the medical device. The O-ring 91 is arranged between the inner surface of the connector 90 and the outer surface of the tubular body 30 to maintain a liquidtight state between the connector 90 and the tubular body 30. The O-ring 91 slidably contacts the inner surface of the connector 90 and the outer surface of the tubular body 30.

The medical connector 20 can be connected to another medical device by the connection connector 90. Therefore, the medical connector 20 can restrict the movement of the medical long body 100 inserted into the medical device in the long axis direction with respect to the other medical device to be connected by the balloon 40.

10 Catheter 20 Medical connector 30 Cylindrical body 31 Inner layer 32 Outer layer 33 Passage 33A Connection hole 34 Lumen 35 Side hole 36 First connection 37 Second connection 38 Intermediate 40 Balloon 41 Edge 70 Tubular 100 Medical Long body for

Claims (7)

A tubular body having a lumen extending in the long axis direction between the tip and the base, through which a long medical body can be inserted.
It has a balloon that is placed in the lumen and can be inflated in a direction orthogonal to the major axis direction by injecting a fluid.
The balloon is a medical connector characterized in that the medical elongated body is gripped by inflating the medical elongated body in a state where the medical elongated body is inserted into the lumen. The medical connector according to claim 1, wherein the tubular body has a side hole on the inner wall surface of the lumen for injecting and discharging a fluid into the balloon. The medical connector according to claim 1 or 2, wherein at least two balloons are arranged in the lumen of the tubular body so as to face each other in a radial direction orthogonal to the long axis direction. .. The medical connector according to any one of claims 1 to 3, wherein at least two balloons are arranged, and a flow path for supplying a fluid to each balloon is connected. The medical connector according to any one of claims 1 to 4, wherein the balloon is formed of a membrane fixed to the lumen of the tubular body. The tubular body has a first connection portion arranged at the tip and connectable to another medical device, a second connection portion arranged at the base end and connectable to another medical device, and the first connection portion. Has an intermediate portion arranged between the connecting portion of the above and the second connecting portion.
The medical connector according to any one of claims 1 to 5, wherein the balloon is arranged in the intermediate portion. The catheter according to any one of claims 1 to 6, wherein the medical connector is provided as a hub, and a tubular body is connected to the tip of the medical connector.

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