JP5548222B2 - Catheter sheath device - Google Patents

Description

  The present invention relates to a catheter sheath device that guides a catheter when the catheter is inserted into a blood vessel.

  2. Description of the Related Art A catheter sheath device is known that includes a sheath that assists insertion of a catheter while expanding a blood vessel when a catheter such as an electrode catheter inserted into the heart through the blood vessel is inserted into the body.

  For example, Patent Literature 1 discloses a catheter sheath device in which a branch tube is provided in a hemostasis valve connector connected to a proximal end of a sheath.

JP 2009-131609 A

  In the conventional catheter sheath device, since the hemostasis valve connector is provided with a branch tube, the size of the hemostasis valve connector is increased, and the weight of the proximal end portion of the catheter sheath device is increased. For this reason, during the procedure using the catheter tube, an inclination may occur due to the weight of the catheter sheath device, which may impair the stability of the catheter procedure.

  This invention is made | formed in view of such a subject, The objective is to provide the technique which can attain size reduction and weight reduction of the proximal end part of a catheter sheath apparatus.

  One embodiment of the present invention is a catheter sheath device. The catheter sheath device includes a sheath portion made of a tubular member having a lumen extending in the axial direction, a hub having a hollow portion connected to an opening of the lumen on the proximal side of the sheath portion, and a proximal end of the hub And a valve-equipped connector having a passage communicating with the hollow portion on the proximal side of the hub, and a hemostasis valve provided in the passage, and the hub includes a columnar hollow base including the hollow portion; , A gripping part that protrudes from the outer peripheral surface of the hollow substrate, a branch pipe that branches from the hollow part and passes through the inside of the gripping part, and a connector connection that protrudes proximally from the gripping part and can be connected to a connector with a valve And a cutting region having a thickness smaller than that of the periphery is provided continuously to the hollow base body and the connector connecting portion.

According to the catheter sheath device of the aspect described above, the hub and the connector with valve can be reduced in size and weight by adopting a structure in which the branch pipe is integrated into the grip portion fixed to the hub and integrated. For this reason, when the catheter is inserted into the body using the catheter sheath device, it is possible to prevent the catheter placement destination from moving due to the weight of the hub and the connector with valve.

  In the catheter sheath device of the above aspect, the gripping portion may protrude in a wing shape along the generatrix on the outer peripheral surface of the hollow base. The gripping portions are provided at three locations along different buses on the outer peripheral surface of the hollow base body, and the branch pipe passes through the inside of one of the gripping sections, and the outer peripheral surface of the hollow base body between the adjacent gripping portions. A region for cutting the hollow substrate may be provided along each bus line. Moreover, the branch pipe may be provided along the edge | side of the proximal side of a holding part.

  According to the present invention, the proximal end portion of the catheter sheath device can be reduced in size and weight.

1 is an overall view showing the appearance of a catheter sheath device according to an embodiment. It is a perspective view which shows the external appearance of the catheter sheath apparatus which concerns on embodiment. FIG. 3A and FIG. 3B are a top view and a side view of the catheter sheath device according to the embodiment, respectively. It is sectional drawing on the AA line of FIG. 3 (A) in the catheter sheath apparatus which concerns on embodiment. It is a side view of a hub in the state where a connector with a valve was removed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same reference numerals are given to the same components, and the description will be omitted as appropriate.

  FIG. 1 is an overall view showing the appearance of a catheter sheath device according to an embodiment. FIG. 2 is a perspective view showing an appearance of the catheter sheath device according to the embodiment. FIG. 3A and FIG. 3B are a top view and a side view of the catheter sheath device according to the embodiment, respectively. FIG. 4 is a cross-sectional view taken along the line AA in FIG. 3A in the catheter sheath device according to the embodiment. FIG. 5 is a side view of the hub with the valve connector removed.

  The catheter sheath device 10 of the present embodiment has a sheath part 20, a hub 30 and a connector with valve 40 as main components, and the inside of the connector with valve 40, the hub 30, and the sheath part 20 in this order from the proximal end side. A lumen that communicates with each other is provided. The catheter sheath device 10 is used as an auxiliary instrument when the distal end of a catheter tube inserted into a blood vessel is installed at a desired placement destination. Specifically, when the catheter tube is placed in the body, the catheter sheath device 10 is inserted into the blood vessel in advance, and the catheter tube is inserted into the above-described lumen, thereby expanding the blood vessel and inserting the catheter into the blood vessel. The tube can be easily inserted.

  The sheath part 20 consists of a tubular member having flexibility. The sheath portion 20 is provided with a lumen through which the catheter tube can be inserted along the axial direction. The outer diameter, the inner diameter, and the length of the sheath portion 20 are, for example, φ2.5 to 3.0 mm, φ2.0 to 2.5 mm, and 400 to 600 mm. By inserting the sheath portion 20 into the blood vessel, the blood vessel Can be expanded. Examples of the material of the sheath portion 20 include PEBAX (registered trademark) and PTFE.

  The hub 30 includes a hollow base body 32, a grip part 34, and a branch pipe 36. In the present embodiment, the hollow base 32 and the grip portion 34 are integrally formed by resin molding. Examples of the material of the hub 30 include PEBAX (registered trademark).

  The hollow base 32 is a columnar member having a hollow portion, and the hollow portion provided in the hollow base 32 is connected to an opening of a lumen provided in the sheath portion 20 on the proximal side of the sheath portion 20. .

  The grip portion 34 is formed of a flat plate-like or wing-like member, and is fixed along the generatrix of the outer peripheral surface of the hollow base 32 on the tip side of the hollow base 32. The protrusion width of the grip portion 34 from the hollow base body 32 may be a width sufficient to hold with a finger, and is, for example, 1 to 3 cm.

  In the present embodiment, the gripping portions 34 are provided at three locations along different buses on the outer peripheral surface of the hollow base body 32. In the following description, the three gripping portions 34 may be distinguished as gripping portions 34a, 34b, and 34c. In the present embodiment, the gripping portions 34a, 34b, and 34c protrude from the outer peripheral surface of the hollow base body 32 at equal intervals. The angle formed by the protruding direction of the gripping portion 34a and the protruding direction of the gripping portion 34b, the gripping portion 34b The angle formed between the protruding direction and the protruding direction of the gripping part 34c and the angle formed between the protruding direction of the gripping part 34c and the protruding direction of the gripping part 34a are both 120 °.

  A branch pipe 36 is provided along the proximal side of the grip portion 34a. The branch pipe 36 is a passage that branches from the hollow portion of the hollow base 32, and a first opening connected to the hollow portion of the hollow base 32 is provided at one end of the branch pipe 36. A second opening connected to the extension tube 50 is provided at the other end. The branch pipe 36 and the extension tube 50 may be detachable, and the extension tube 50 may be fused to the second opening of the branch pipe 36.

  The end of the extension tube 50 opposite to the branch pipe 36 is connected to a branch connector 54 with a stop cock 52. The branch connector 54 includes a branch path 56a, a branch path 56b, and a branch path 56c. The extension tube 50 is connected to the branch path 56a. By operating the stop cock 52, the connection between the extension tube 50 and the branch path 56b and the branch path 56c is interrupted, or the extension tube 50 is connected to the branch path 56b. Only one of the branch paths 56c can be connected.

  Using the extension tube 50, for example, a chemical solution can be injected into the body. Specifically, a drug solution pack containing a drug solution such as a contrast medium is attached to the end of the branch channel 56b or the branch channel 56c via a tube, and the drug solution is injected into the body from the distal end of the sheath portion 20 as necessary. it can.

  The connector connecting portion 33 forms a part of the hollow base 32 that protrudes proximally from the grip portion 34, and the connector 40 with a valve can be connected to the connector connecting portion 33. At the proximal end of the connector connecting portion 33, an opening serving as an outlet or an inlet of the hollow portion of the hollow base 32 is provided. A thread 35 for connecting the valve connector 40 is provided in a predetermined region of the outer peripheral surface of the connector connecting portion 33.

  Further, a cutting region 38 that can be cut with a cutter such as a slitter is formed on the outer peripheral surface of the hollow base 32. The cutting region 38 is formed between the root portion of the grip portion 34a and the root portion of the grip portion 34b, between the root portion of the grip portion 34b and the root portion of the grip portion 34c, and between the root portion of the grip portion 34c and the grip portion. Corresponding to a total of three locations between the base portion 34 a and the hollow base 32, the hollow base 32 is provided on the outer peripheral surface of the hollow base 32 along the axial direction of the hollow base 32. A grip portion 34 is formed so as to protrude from the head.

  The cutting area 38 is thinner than the surrounding area so that it can be easily cut. The cutting region 38 has a region R adjacent to the base portion of the grip portion 34 and a region S provided in the connector connecting portion 33 (see FIG. 5).

  In the connector connecting portion 33, the thread S 35 is not formed in the region S, and the cutting region 38 provided in the connector connecting portion 33 is designed not to be easily cut by the thread 35.

  The valved connector 40 is a member that can be attached to and detached from the hub 30. Specifically, the connector 40 with a valve is a hollow member similar to the hollow base body 32, and the inner peripheral surface of the connector 40 with a valve so that the connector connecting portion 33 can be fitted into the hollow portion of the connector 40 with the valve. In addition, a screw groove 42 that is screwed with a screw thread 35 provided in the connector connecting portion 33 is provided.

  A hemostasis valve 44 is provided in the hollow part of the connector 40 with valve. The proximal end side of the hemostatic valve 44 is connected to the proximal end side of the valved connector 40. The hemostasis valve 44 has a conical shape on the distal side. Between the distal end side of the hemostatic valve 44 and the inner peripheral surface of the valved connector 40, a gap is provided through which the proximal end portion of the connector connecting portion 33 can be inserted. Thereby, when the connector 40 with a valve is attached to the connector connecting portion 33, the conical portion of the hemostasis valve 44 is disposed inside the connector connecting portion 33. And by screwing the connector 40 with a valve, the front-end | tip of this conical part enters the inner side of the connector connection part 33, and the front-end | tip of the hemostatic valve 44 narrows, and an internal diameter narrows. With the above configuration, in a state where the catheter tube is inserted into the catheter sheath device 10, it is possible to stop the blood by closing the gap between the connector connecting portion 33 and the catheter tube.

  According to the catheter sheath device 10 described above, the hub 30 and the connector 40 with valve are reduced in size and weight by adopting a structure in which the branch pipe 36 is integrated into the grip portion 34 a fixed to the hub 30. Can be For this reason, when the catheter is inserted into the body using the catheter sheath device 10, it is possible to prevent the placement destination of the catheter from moving due to the weight of the hub 30 and the connector 40 with the valve.

  When the cutting region 38 is cut in a state where the connector 40 with the valve is removed from the connector connecting portion 33, the holding portion 34 that protrudes from the hollow base 32 to the opposite side of the cutting region 38 is provided. Region 38 can be easily cut.

  Since the branch pipe 36 branched from the hollow portion of the hollow base body 32 is provided along the proximal side of the grip portion 34a, the extension tube 50 connected to the branch pipe 36 cuts the cutting region 38. It is possible to suppress the hindrance to the work and facilitate the work.

  The present invention is not limited to the above-described embodiments, and various modifications such as design changes can be added based on the knowledge of those skilled in the art. Embodiments to which such modifications are added Can also be included in the scope of the present invention.

  For example, the connector 40 with a valve need only be detachable from the connector connecting portion 33, and the connection between the connector connecting portion 33 and the connector 40 with a valve is not a screw type as in the embodiment, but a fitting type structure. May be.

DESCRIPTION OF SYMBOLS 10 Catheter sheath apparatus, 20 Sheath part, 30 Hub, 32 Hollow base | substrate, 33 Connector connection part, 40 Connector with valve, 44 Hemostatic valve

Claims (2)

A sheath portion made of a tubular member having a lumen extending in the axial direction;
A hub having a hollow portion connected to the opening of the lumen on the proximal side of the sheath portion;
A connector with a valve that is detachably attached to a proximal end of the hub, and has a passage communicating with the hollow portion on the proximal side of the hub, and a hemostasis valve provided in the passage;
With
The hub includes a columnar hollow base including the hollow portion;
Gripping portions provided to protrude from the outer peripheral surface of the hollow substrate at three locations along different generatrixes on the outer peripheral surface of the hollow substrate ;
And projecting, can be connected with connector the valve connector connecting portion to the proximal side than the front Symbol gripper,
Have
A cutting region having a thin thickness compared to the surroundings is provided continuously to the hollow base body and the connector connecting portion ,
The catheter sheath device , wherein the cutting region of the hollow base is provided along a generatrix of the outer peripheral surface of the hollow base between adjacent gripping portions . The catheter sheath device according to claim 1, wherein the grip portion protrudes in a wing shape along a generatrix on the outer peripheral surface of the hollow base body.

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