Locking connection catheter sheath
By adopting snap-rotating locking and jaw annular groove matching design in the catheter sheath, the problem of easy separation between the dilator and the catheter sheath is solved, achieving more labor-saving axial locking and higher operating safety.
Patent Information
- Application Number
- CN202420489602.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-14
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-03-14
Smart Images
Figure CN222445091U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a catheter sheath with locking connection. Background Art
[0002] The connection between the dilator tube seat on the dilator and the sheath seat of the catheter sheath must be firm and tight, and the risk of separation between the two must be avoided during the interventional process. However, when the dilator and sheath enter the vein or artery together to establish a pathway, when encountering vascular stenosis or tortuosity, if the lock is not firm, the dilator is likely to encounter resistance and separate from the sheath seat on the catheter sheath, resulting in the sheath and dilator tube not fitting tightly enough, thereby scratching the blood vessel and causing problems such as dissection, causing harm and pain to the patient.
[0003] There are also sheath tube seats and dilator tube seats in the market that are connected by threads. When the dilator is withdrawn during surgery, the dilator tube seat and the sheath tube seat need to be unscrewed, which is difficult, time-consuming and labor-intensive to operate. Therefore, it is necessary to provide a guide sheath that is simple and convenient to use and has low requirements on production process and mold. Utility Model Content
[0004] The utility model aims to provide a locking connection catheter sheath, which solves the problem in the background art that when the dilator is used, the dilator tube seat and the sheath tube seat need to be rotated apart, which is difficult to operate and time-consuming and labor-intensive.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a catheter sheath with a locking connection, comprising an expansion tube, a tube seat is fixedly connected to the top of the expansion tube, a torsion piece is arranged below the tube seat, a locking piece is arranged below the torsion piece, a sealing assembly is arranged below the locking piece, a threaded piece is connected below the sealing assembly, a sheath tube joint is threadedly connected to the bottom of the threaded piece, a sheath tube is fixedly connected to the bottom of the sheath tube joint, first claws are fixedly connected to both sides of the bottom of the torsion piece, an annular groove is provided at the top of the locking piece, locking piece protrusions are provided on both sides of the locking piece, a first claw groove is provided on the inner side of the first claw, and the inner wall of the first claw groove is slidably connected to the outer wall of the locking piece protrusion.
[0006] By adopting the above technical solution, the expansion tube with the tube seat and the sealing assembly and the locking piece are locked by buckle rotation, which can prevent the expander from retreating during puncture. Buckle rotation locking is a more labor-saving and more practical way to axially lock the expander.
[0007] As a further description of the above technical solution: the sealing assembly includes a first joint of the sheath seat, the first joint of the sheath seat is arranged below the locking piece, a silicone piece is connected below the first joint of the sheath seat, a second joint of the sheath seat is connected below the silicone piece, and the second joint of the sheath seat is fixedly connected to a threaded piece below.
[0008] By adopting the above technical solution, the sealing assembly includes a first joint of the tube sheath seat, a second joint of the sheath seat, a silicone member and a thin film tube. The main body of the silicone member is cylindrical, and its two ends are respectively connected to the first joint of the sheath seat and the second joint of the sheath seat. The two ends of the silicone member have curved surfaces transitioning to the cylindrical main body, and the silicone member includes a through hole. The second joint of the sheath seat includes an interface, which connects the side branch tube and the through hole of the silicone member.
[0009] As a further description of the above technical solution: both ends of the annular groove are fixedly connected to limiting ribs.
[0010] By adopting the above technical solution, the rotation angle of the claw on the torsion member in the annular groove is limited to less than 180°.
[0011] As a further description of the above technical solution: a boss is fixedly connected in the annular groove, and the inner wall of the annular groove is slidably connected to the outer wall of the first claw.
[0012] By adopting the above technical solution, when the claw moves to the boss position of the annular groove, the twisting member is restricted from axial movement, so that the expander is axially locked. When the first claw moves out to the boss position of the annular groove, the twisting member can move axially, so that the expander is unlocked.
[0013] As a further description of the above technical solution: a second claw is provided on one side of the first claw on both sides, and the second claw is fixedly connected to the torsion member.
[0014] By adopting the above technical solution, the twisting piece is clamped and assembled on the expander tube seat through the second clamping claw on the twisting piece, and the twisting piece and the expander tube seat can rotate relative to each other but cannot move axially.
[0015] As a further description of the above technical solution: the threaded part and the right side of the silicone part are both penetrated by and fixedly connected with a side branch pipe.
[0016] By adopting the above technical solution, the threaded part includes an interface, and the interface is connected to the side branch pipe.
[0017] As a further description of the above technical solution: a thin film tube is arranged in the silicone member.
[0018] By adopting the above technical solution, a pressurized space is formed between the film tube and the silicone member. Physiological saline is injected into the pressurized space through the interface of the second joint of the sheath seat, so that the film tube collapses and shrinks, thereby covering the interventional instrument passing through the sheath seat.
[0019] As a further description of the above technical solution: a sealing gasket is arranged on the top of the sheath tube joint.
[0020] By adopting the above technical solution, a sealing effect is achieved.
[0021] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0022] 1. The utility model provides a locking connection catheter sheath, which firstly uses a buckle rotational locking between the expansion tube with a tube seat and the sealing assembly and the locking piece to prevent the expansion tube from retreating during puncture. The buckle rotational locking is a more labor-saving and more practical way to axially lock the expansion tube in clinical practice.
[0023] 2. The utility model provides a catheter sheath with a locking connection, in which a protrusion is provided on the locking member and a groove is provided on the first claw on the twisting member. When the claw moves to the boss position of the annular groove, the protrusion cooperates with the groove to brake the twisting member, thereby limiting the rotation of the twisting member and avoiding unlocking the expander due to misoperation. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0025] Figure 2 It is a cross-sectional view of the sealing component of the utility model;
[0026] Figure 3 It is a cross-sectional view of the expansion tube of the utility model;
[0027] Figure 4 It is a cross-sectional view of the unlocked position of the utility model;
[0028] Figure 5 It is a cross-sectional view of the locking position of the utility model;
[0029] Figure 6 It is a schematic diagram of the protruding structure of the locking member of the utility model;
[0030] Figure 7 This is a schematic diagram of the overall structure of the locking member of the utility model;
[0031] Figure 8 This is a schematic diagram of the first claw structure of the utility model;
[0032] Fig. 9 This is a schematic diagram of the twisting member structure of the utility model.
[0033] In the figure: 1. locking member protrusion; 2. side branch tube; 3. sheath tube; 4. first claw groove; 5. tube seat; 6. expansion tube; 7. twisting member; 8. locking member; 9. threaded member; 10. sheath tube joint; 11. sealing gasket; 12. first claw; 13. annular groove; 14. boss; 15. limiting rib; 16. second claw; 17. first joint of sheath seat; 18. second joint of sheath seat; 19. silicone member; 20. film tube. DETAILED DESCRIPTION
[0034] The following will refer to the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0035] In order to further understand the content of the utility model, the utility model is described in detail with reference to the accompanying drawings.
[0036] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The utility model provides a locking and connected catheter sheath, comprising an expansion tube 6, a tube seat 5 is fixedly connected to the top of the expansion tube 6, the expander comprises an expansion tube 6 with a tube seat 5 and a twisting piece 7, a twisting piece 7 is arranged below the tube seat 5, a locking piece 8 is arranged below the twisting piece 7, which has a locking effect, a sealing component is arranged below the locking piece 8, a threaded component 9 is connected below the sealing component, a sheath tube connector 10 is threadedly connected to the bottom of the threaded component 9, and the threaded component 9 is connected to the sheath tube connector 10, and the sheath tube connector 10 is fixedly connected to the sheath tube 3 at the bottom, and the twisting piece 7 The first claws 12 are fixedly connected to both sides of the bottom for easy limiting. An annular groove 13 is provided on the top of the locking piece 8 to facilitate the movement of the first claw 12. Locking piece protrusions 1 are provided on both sides of the locking piece 8. A first claw groove 4 is provided on the inner side of the first claw 12. The inner wall of the first claw groove 4 is slidably connected to the outer wall of the locking piece protrusion 1. When the first claw 12 moves to the boss 14 position of the annular groove 13, the locking piece protrusion 1 cooperates with the first claw groove 4 to brake the torsion piece 7, limit the rotation of the torsion piece 7, and avoid unlocking the expander due to misoperation.
[0037] Reference Figure 2 The sealing component includes a first joint 17 of the sheath seat, which is arranged below the locking member 8. A silicone member 19 is connected below the first joint 17 of the sheath seat, and a second joint 18 of the sheath seat is connected below the silicone member 19. The second joint 18 of the sheath seat is fixedly connected to the threaded member 9 below. The main body of the silicone member 19 is cylindrical, and its two ends are respectively connected to the first joint 17 of the sheath seat and the second joint 18 of the sheath seat. There are curved surfaces at both ends of the silicone member 19 transitioning to the cylindrical main body, and the silicone member 19 includes a through hole.
[0038] Reference Figure 6 , Figure 7 , Figure 8 and Fig. 9, both ends of the annular groove 13 are fixedly connected with limiting ribs 15, which limit the rotation angle of the claw on the torsion piece 7 in the annular groove 13 to be less than 180°, and a boss 14 is fixedly connected in the annular groove 13 to play a limiting effect, the inner wall of the annular groove 13 is slidably connected to the outer wall of the first claw 12, and a second claw 16 is provided on one side of the first claw 12 on both sides, and the second claw 16 is fixedly connected to the torsion piece 7, and the torsion piece 7 is assembled to the dilator tube seat 5 through the second claw 16 on the torsion piece 7. The torsion piece 7 and the dilator tube seat 5 can rotate with each other but cannot move axially. The threaded member 9 and the right side of the silicone member 19 are penetrated and fixedly connected with the side branch tube 2, a thin film tube 20 is provided in the silicone member 19, and a sealing gasket 11 is provided on the top of the sheath tube joint 10 to improve the sealing effect.
[0039] Working principle: The sheath seat is composed of a sealing component, a locking member 8, a threaded member 9, a sheath tube connector 10 and a sealing gasket 11. The torsion member 7 cooperates with the locking member 8. By rotating the torsion member 7, the first claw 12 on the torsion member 7 can move in the annular groove 13 on the locking member 8. When the claw moves to the position of the boss 14 of the annular groove 13, the torsion member 7 is restricted from axial movement, so that the expander is axially locked. The expander comprises an expansion tube 6 with a tube seat 5 and a torsion member 7. When the first claw 12 moves out to the position of the boss 14 of the annular groove 13, the torsion member 7 can move axially, so that the expander is unlocked. The expander and the sheath seat are locked by a buckle rotation, which can prevent the expander from retreating during puncture. The snap-on rotary locking is a method of axially locking the expander that saves effort and is more in line with actual clinical operations. The locking piece 8 has a locking piece protrusion 1, and the first claw 12 on the torsion piece 7 has a first claw groove 4. When the first claw 12 moves to the boss 14 position of the annular groove 13, the locking piece protrusion 1 cooperates with the first claw groove 4 to brake the torsion piece 7, thereby limiting the rotation of the torsion piece 7 and avoiding unlocking the expander due to misoperation. The second claw 16 on the torsion piece 7 assembles the torsion piece 7 to the expander tube seat 5. The torsion piece 7 and the expander tube seat 5 can rotate relative to each other but cannot move axially. The locking mechanism is simple and convenient to use, has a simple structure, and has low requirements for production process and mold.
[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A locking-connected catheter sheath, comprising a dilation tube (6), characterized in that: The top of the expansion tube (6) is fixedly connected to a tube seat (5), a twisting piece (7) is arranged below the tube seat (5), a locking piece (8) is arranged below the twisting piece (7), a sealing assembly is arranged below the locking piece (8), a threaded piece (9) is connected below the sealing assembly, the bottom of the threaded piece (9) is threadedly connected to a sheath tube joint (10), the bottom of the sheath tube joint (10) is fixedly connected to a sheath tube (3), both sides of the bottom of the twisting piece (7) are fixedly connected to first claws (12), an annular groove (13) is provided at the top of the locking piece (8), both sides of the locking piece (8) are provided with locking piece protrusions (1), a first claw groove (4) is provided inside the first claw (12), and the inner wall of the first claw groove (4) is slidably connected to the outer wall of the locking piece protrusion (1).
2. A locking catheter sheath according to claim 1, characterized in that: The sealing assembly comprises a sheath seat first joint (17), the sheath seat first joint (17) is arranged below the locking member (8), a silicone member (19) is connected below the sheath seat first joint (17), a sheath seat second joint (18) is connected below the silicone member (19), and the sheath seat second joint (18) is fixedly connected to the threaded member (9) below.
3. A locking catheter sheath according to claim 1, characterized in that: Both ends of the annular groove (13) are fixedly connected to limiting ribs (15).
4. The catheter sheath with locking connection according to claim 1, characterized in that: A boss (14) is fixedly connected inside the annular groove (13), and the inner wall of the annular groove (13) is slidably connected to the outer wall of the first claw (12).
5. The catheter sheath with locking connection according to claim 1, characterized in that: A second claw (16) is provided on one side of the first claw (12) on both sides, and the second claw (16) is fixedly connected to the twisting member (7).
6. The catheter sheath with locking connection according to claim 1, characterized in that: The threaded member (9) and the right side of the silicone member (19) are both penetrated by and fixedly connected with a side branch pipe (2).
7. The catheter sheath with locking connection according to claim 2, characterized in that: A thin film tube (20) is arranged inside the silicone member (19).
8. The locking-connected catheter sheath according to claim 2, characterized in that: A sealing gasket (11) is provided on the top of the sheath tube joint (10).