Tearable sheath

Abstract

The utility model relates to the technical field of medical devices, and discloses a tearable sheath, which comprises a sheath tube main body seat, a hemostasis valve main body and a dilator handle, the bottom of the sheath tube main body seat is fixedly connected with a tube body, a mounting groove is arranged in the hemostasis valve main body, two sides in the mounting groove are fixedly connected with positioning ribs, and the positioning ribs are fixedly connected with the dilator handle. A cap is arranged at the top of the hemostasis valve body, a cap protrusion is arranged on the cap, a first sealing gasket is arranged in the mounting groove, a second sealing gasket is arranged at the top of the first sealing gasket, and a dismounting assembly is arranged at the bottom of the hemostasis valve body. According to the utility model, the sheathing canal main body seat, the sheathing canal clamping jaw, the hemostasis valve main body, the connecting column, the groove and the O-shaped sealing ring are matched to work, the hemostasis valve and the sheathing canal are split, the hemostasis valve is detached during tearing, only the canal seat and the sheathing canal body need to be torn, the tearing force can be reduced, and the hemostasis valve main body seat and the sheathing canal main body are rotationally locked through the buckle, so that the hemostasis valve is convenient to use. The operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a tearable sheath. Background Art

[0002] The operation of establishing a percutaneous access channel to the blood vessel cavity through the catheter sheath is as follows: first, use a puncture needle to make a small opening in the artery or vein, then introduce the guide wire into the artery or vein through the inner cavity of the puncture needle, and remove the puncture needle. Pass the dilator through the catheter sheath hemostasis valve into the inner cavity of the catheter sheath, lock the two together and guide them into the artery or vein through the guide wire. After the sheath position of the catheter sheath is fixed, withdraw the dilator, and finally the catheter sheath can provide a channel for entering and exiting or replacing various interventional devices. When performing more complex interventional treatments, the sheath needs to be withdrawn from the human body after use. Since the tail of the sheath is usually blocked by an instrument, the sheath with the catheter inserted inside cannot be directly removed from the body. At this time, the sheath needs to be torn from the outside, and torn while withdrawing until it is completely removed. This type of sheath is called a tearable sheath.

[0003] After searching, the existing Chinese patent announcement number is: CN115624413A, which provides an adjustable sheath. This patent can achieve control of hemostasis when instruments such as guidewires and catheters pass through, and can effectively reduce downward pressure resistance.

[0004] Although the above patent can achieve control over hemostasis and effectively reduce downward pressure resistance, the above adjustable sheath still has the following problems: when operating, it is necessary to press the pressure cap hard to make it engage with the claw, and when releasing the pressure cap, it is necessary to press the claw to deform it and separate it from the pressure cap, which is inconvenient to operate.

[0005] In order to solve the above problems, a tearable sheath is proposed. Utility Model Content

[0006] The purpose of the utility model is to provide a tearable sheath, which solves the problem in the background art that when releasing the pressure cap, the clamping claw needs to be pressed to deform it and separate from the pressure cap, which is inconvenient to operate.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tearable sheath, comprising a sheath tube main body seat, a hemostatic valve main body and an expander handle, the bottom of the sheath tube main body seat is fixedly connected to a tube body, a mounting groove is provided in the hemostatic valve main body, and positioning ribs are fixedly connected on both sides of the mounting groove, a cap is provided on the top of the hemostatic valve main body, a cap protrusion is provided on the cap, a first sealing gasket is provided in the mounting groove, a second sealing gasket is provided on the top of the first sealing gasket, a disassembly component is provided at the bottom of the hemostatic valve main body, sheath tube claws are fixedly connected on both sides of the top of the sheath tube main body seat, and an expander stopper is fixedly connected to the outside of the expander handle.

[0008] By adopting the above technical solution, the core hemostatic component of the tearable sheath is primarily a sealing gasket. Conventional technology involves making a predetermined incision on the end face of a highly elastic hemostatic valve, allowing the interventional device to pass through the incision. Due to the high elasticity of the sealing gasket, it can wrap around the device tube, achieving a good sealing and hemostatic effect. However, in actual use, when the device is inserted or withdrawn through the sealing gasket's incision, the sealing gasket's wrapping effect is not ideal, and blood will still flow out of the incision.

[0009] As a further description of the above technical solution: the disassembly component includes a connecting column, which is fixedly connected to the bottom of the hemostatic valve body, and the hemostatic valve ring convex is fixedly connected to both sides of the connecting column, and a groove is provided under the connecting column.

[0010] By adopting this technical solution, the hemostatic valve and sheath are separated. To remove the hemostatic valve during tearing, only the tube seat and sheath body need to be torn, which can reduce the tearing force. The disadvantage of the integrated design is that foreign matter, such as the gasket, can easily fall out during tearing. The hemostatic valve body seat and sheath body are locked together by a snap-fit ​​rotation, making operation convenient.

[0011] As a further description of the above technical solution: a first sealing ring linear cutout is provided in the first sealing gasket, and a second sealing ring linear cutout is provided in the second sealing gasket.

[0012] By adopting the above technical solution, when two sealing pads with linear incisions are superimposed, the incision directions are cross-shaped, which can improve the sealing and hemostasis effect.

[0013] As a further description of the above technical solution: positioning grooves are provided on both sides of the first sealing gasket and the second sealing gasket, and the two positioning ribs are respectively arranged in the two positioning grooves.

[0014] By adopting the above technical solution, the positioning rib is arranged in the positioning groove to achieve a limiting effect.

[0015] As a further description of the above technical solution: the hemostatic valve body is arranged on the top of the sheath tube body seat, and the dilator handle is arranged on the top of the hemostatic valve body.

[0016] By adopting the above technical solution, the expander handle and the hemostatic valve are locked by a snap-on rotation, which can prevent the expander from retreating during puncture. The disadvantage of the snap-on connection between the expander handle and the hemostatic valve body is that when entering the vein or artery to establish a pathway, if the blood vessels are narrow or tortuous, the expander is likely to encounter resistance and separate from the sheath seat, thereby scratching the blood vessels and causing problems such as dissection.

[0017] As a further description of the above technical solution: an O-shaped sealing ring is arranged in the groove, and the O-shaped sealing ring is arranged inside the sheath tube main body seat.

[0018] By adopting the above technical solution, the O-ring can enhance the sealing effect.

[0019] As a further description of the above technical solution: the outer wall of the hemostatic valve ring is slidably connected to the inner wall of the sheath clamping claw.

[0020] By adopting the above technical solution, it can be disassembled conveniently and quickly.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. The utility model provides a tearable sheath, which first cooperates with the sheath body seat, sheath claws, hemostatic valve body, connecting column, groove and O-ring to work together. The hemostatic valve and the sheath are split. When tearing, the hemostatic valve can be removed by tearing the tube seat and the sheath body, which can reduce the tearing force. The hemostatic valve body seat and the sheath body are locked by a buckle and rotation, which is easy to operate.

[0023] 2. The utility model provides a tearable sheath, which works in conjunction with the hemostatic valve body, the cap, the cap protrusion, the first sealing gasket, the second sealing gasket, the expander handle and the expander block. The core hemostatic component of the tearable sheath is mainly the sealing gasket. The conventional process is to cut an incision of a certain length on the end face of the hemostatic valve with high elasticity to allow the interventional instrument to pass through the incision. Due to the high elasticity of the sealing gasket, it can wrap the instrument tube body to achieve a good sealing and hemostatic function. The expander handle and the hemostatic valve are locked by a snap-on rotation to prevent the expander from retreating during puncture. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0026] Figure 3 This is a cross-sectional view of the main structure of the hemostatic valve of the present utility model;

[0027] Figure 4 This is an exploded schematic diagram of the overall structure of the utility model;

[0028] Figure 5 This is a schematic diagram of the first sealing gasket structure of the present invention;

[0029] Figure 6 This is a schematic diagram of the second sealing gasket structure of the present invention;

[0030] Figure 7 This is an exploded schematic diagram of the connecting column structure of the present invention.

[0031] In the figure: 1. Sheath body seat; 2. Hemostatic valve body; 3. Dilator handle; 4. Tube body; 5. Mounting groove; 6. Cap; 7. Cap convex; 8. First sealing gasket; 9. Second sealing gasket; 10. First sealing ring linear cut; 11. Positioning groove; 12. Second sealing ring linear cut; 13. Positioning rib; 14. Sheath claw; 15. Hemostatic valve ring convex; 16. Connecting column; 17. Groove; 18. O-ring; 19. Dilator block. DETAILED DESCRIPTION

[0032] The following will refer to the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings.

[0034] Reference Figure 1 、 Figure 2 and Figure 3 The utility model is a tearable sheath, comprising a sheath body seat 1, a hemostatic valve body 2 and an expander handle 3. The bottom of the sheath body seat 1 is fixedly connected to a tube body 4. A mounting groove 5 is opened in the hemostatic valve body 2 to facilitate the installation of a first sealing gasket 8 and a second sealing gasket 9. Both sides of the mounting groove 5 are fixedly connected with positioning ribs 13 to play a limiting effect. A cap 6 is provided on the top of the hemostatic valve body 2, and a cap convex 7 is provided on the cap 6. The cap convex 7 cooperates with the expander stopper 19 to play a limiting effect. A first sealing gasket 8 is provided in the mounting groove 5, and a second sealing gasket 9 is provided on the top of the first sealing gasket 8 to play a sealing effect. A disassembly component is provided at the bottom of the hemostatic valve body 2, and sheath claws 14 are fixedly connected to both sides of the top of the sheath body seat 1 to limit the hemostatic valve ring convex 15. The outside of the expander handle 3 is fixedly connected with an expander stopper 19.

[0035] Reference Figure 2 and Figure 4 The disassembly component includes a connecting column 16, which is fixedly connected to the bottom of the hemostatic valve body 2 to fix it. Both sides of the connecting column 16 are fixedly connected to the hemostatic valve ring bulge 15, which cooperates with the sheath clamping claw 14 for limiting. A groove 17 is provided under the connecting column 16 to facilitate the installation of an O-ring 18. The outer wall of the hemostatic valve ring bulge 15 is slidably connected to the inner wall of the sheath clamping claw 14. An O-ring 18 is provided in the groove 17. The O-ring 18 is provided inside the sheath body seat 1, and the O-ring 18 has a sealing effect.

[0036] Reference Figure 5 、 Figure 6 and Figure 7 A first sealing ring linear incision 10 is provided in the first sealing gasket 8, and a second sealing ring linear incision 12 is provided in the second sealing gasket 9. When the two sealing gaskets with linear incisions are superimposed, the incision directions are cross-intersecting. Positioning grooves 11 are provided on both sides of the first sealing gasket 8 and the second sealing gasket 9. Two positioning ribs 13 are respectively provided in the two positioning grooves 11, which play a limiting effect. The hemostatic valve body 2 is provided on the top of the sheath body seat 1, and the dilator handle 3 is provided on the top of the hemostatic valve body 2.

[0037] Working principle: By holding the expander handle 3 and rotating it so that the expander stopper 19 is under the cap protrusion 7, the expander handle 3 is locked, which can prevent the expander handle 3 from retreating during puncture. When two sealing pads with straight incisions are superimposed, the incision directions are cross-shaped, which can improve the sealing and hemostasis effect. The core hemostatic components of the tearable sheath are mainly the first sealing pad 8 and the second sealing pad 9. The conventional process is to cut a certain length of incision on the end face of the hemostatic valve body 2 with high elasticity, allowing the interventional instrument to pass through the incision. Due to the high elasticity of the first sealing pad 8 and the second sealing pad 9, they can wrap the instrument tube body to achieve a good sealing and hemostasis function. By holding the hemostatic valve body 2 and rotating it so that the hemostatic valve ring protrusion 15 is under the sheath clamping claw 14, the hemostatic valve body 2 is locked, thereby achieving convenient disassembly.

[0038] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tearable sheath, comprising a sheath tube body seat (1), a hemostatic valve body (2) and a dilator handle (3), characterized in that: The bottom of the sheath tube main seat (1) is fixedly connected to a tube body (4); a mounting groove (5) is provided in the hemostatic valve main body (2); positioning ribs (13) are fixedly connected to both sides of the mounting groove (5); a cover cap (6) is provided on the top of the hemostatic valve main body (2); a cover cap protrusion (7) is provided on the cover cap (6); a first sealing gasket (8) is provided in the mounting groove (5); a second sealing gasket (9) is provided on the top of the first sealing gasket (8); a disassembly component is provided at the bottom of the hemostatic valve main body (2); sheath tube claws (14) are fixedly connected to both sides of the top of the sheath tube main seat (1); and an expander stopper (19) is fixedly connected to the outside of the expander handle (3).

2. A tearable sheath according to claim 1, characterized in that: The disassembly assembly comprises a connecting column (16), wherein the connecting column (16) is fixedly connected to the bottom of the hemostatic valve body (2), and both sides of the connecting column (16) are fixedly connected to the hemostatic valve annular protrusion (15), and a groove (17) is provided below the connecting column (16).

3. A tearable sheath according to claim 1, characterized in that: A first sealing ring linear cutout (10) is provided in the first sealing gasket (8), and a second sealing ring linear cutout (12) is provided in the second sealing gasket (9).

4. A tearable sheath according to claim 1, characterized in that: Positioning grooves (11) are provided on both sides of the first sealing gasket (8) and the second sealing gasket (9), and the two positioning ribs (13) are respectively arranged in the two positioning grooves (11).

5. A tearable sheath according to claim 1, characterized in that: The hemostatic valve body (2) is arranged on the top of the sheath tube body seat (1), and the dilator handle (3) is arranged on the top of the hemostatic valve body (2).

6. A tearable sheath according to claim 2, characterized in that: An O-shaped sealing ring (18) is arranged in the groove (17), and the O-shaped sealing ring (18) is arranged inside the sheath tube main body seat (1).

7. A tearable sheath according to claim 2, characterized in that: The outer wall of the hemostatic valve annular protrusion (15) is slidably connected to the inner wall of the sheath clamping claw (14).

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