A hemostatic valve and an improved tearable sheath device

Abstract

This utility model relates to the field of interventional medical device technology, and discloses a hemostatic valve and an improved tearable sheath device. The hemostatic valve includes a valve cover and a sheath tube. The valve cover is cylindrical, with an annular flange at one end and internal threads on the inner wall. A silicone sealing ring is located inside the valve cover. The silicone sealing ring deforms when compressed to achieve a seal. Sheath seats are fixedly connected to both the left and right sides of the sheath tube. This utility model provides two convenient installation methods: pressing and threaded tightening. When pressed, the latch slides into the locking groove along the guide rail, accompanied by a "click," quickly completing the connection and significantly saving surgical preparation time, making it suitable for emergency surgical scenarios where time is of the essence. When threaded tightening is used, the silicone pad at the bottom of the cover deforms under pressure, achieving excellent sealing and effectively preventing blood leakage, making it suitable for delicate surgeries with extremely high requirements for sterility and leak-proofness.

Description

Technical Field

[0001] This utility model relates to the field of interventional medical device technology, and in particular to a hemostatic valve and an improved tearable sheath device. Background Technology

[0002] The hemostatic valve and improved tearable sheath device are suitable for various interventional surgical scenarios. In cardiovascular interventional surgery, such as coronary angiography and stent implantation, the hemostatic valve can effectively control bleeding after puncture of the blood vessel. The improved tearable sheath facilitates the entry and exit of instruments from the blood vessel and ensures the sealing of the puncture site during the operation, preventing blood extravasation and maintaining a clear surgical field. In neurointerventional surgery, for intracranial aneurysm embolization and interventional treatment of cerebral vascular malformations, the device can be precisely connected to ensure hemostasis and instrument delivery needs during delicate operations, reduce surgical risks, and improve treatment outcomes.

[0003] In existing technologies, some catheter sheaths are not easily torn. In terms of materials, polyurethane, polyethylene, etc., have excellent mechanical strength and toughness. For example, the strong covalent bonds of polyurethane molecules can disperse stress. The manufacturing process uses precision extrusion or injection molding to make the internal structure dense and uniform. However, one-piece molded catheter sheaths have limitations. Because they are made from a single mold, the structure is fixed. Surgical scenarios are varied, and the requirements for catheter sheaths are different in various aspects. One-piece molded catheter sheaths are difficult to adjust temporarily, which limits the flexibility and precision of surgical operations.

[0004] However, in actual use, the hemostatic valve of the tearable sheath is integrally formed with the sheath tube, which has obvious drawbacks. In scenarios such as angiography where frequent flushing is required, medical staff have to repeatedly open and close the hemostatic valve, which is cumbersome and greatly slows down the surgical pace. Some manufacturers have launched simplified versions of sheath tubes without hemostatic valves, but they are difficult to meet the diverse hemostatic needs of different surgical procedures. This forces hospitals to purchase two different specifications of products at the same time, which unnecessarily increases procurement and inventory costs. In response to the above problems, a hemostatic valve and an improved tearable sheath device are proposed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a hemostatic valve and an improved tearable sheath device. It aims to improve upon existing technologies by enabling multiple uses of a single sheath, avoiding repeated purchases by hospitals. In terms of design, it balances sealing performance with ease of operation, adopting a threaded self-locking design. When tightened, the threads tightly engage to ensure zero blood leakage. It is also equipped with a snap-on quick-release design, allowing surgeons to quickly install and remove the device with one hand during surgery, completing the operation within seconds, greatly improving surgical efficiency and meeting the needs of diverse surgeries.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A hemostatic valve includes a hemostatic valve cover, which is cylindrical with an annular flange at one end of its opening edge and internal threads on its inner wall. The hemostatic valve cover has a silicone sealing ring inside, which deforms at the bottom when compressed to achieve a seal. As a further description of the above technical solution: An improved tearable sheath device includes a hemostatic valve and a sheath tube. Sheath seats are fixedly connected to the left and right sides of the outer side of the sheath tube. An annular retaining rail is fixedly connected to the outer side of the sheath seat. Connecting rods are slidably connected to the upper and lower ends of the annular retaining rail. A limit cover is fixedly connected to the top of the connecting rod. A blade is fixedly connected to the other end of the connecting rod. A return spring is sleeved on the outer side of the connecting rod. The outer side of the sheath seat is connected to the hemostatic valve cover through a connecting mechanism. As a further description of the above technical solution: The connecting mechanism includes a mounting frame, which is fixedly connected to the outside of the annular track. A connecting shaft is fixedly connected inside the mounting frame, and a rotating plate is rotatably connected to the outside of the connecting shaft. A reset component is fixedly connected to the left side of the rotating plate, and a positioning rod is fixedly connected to the right side of the rotating plate. As a further description of the above technical solution: The reset assembly includes a telescopic rod, which is externally fixedly connected to the outside of the rotating plate, and a tension spring is sleeved on the outside of the telescopic rod. As a further description of the above technical solution: The connecting mechanism includes a sheath seat, the outer inner wall of which is fixedly connected to the outside of the sheath tube. The outer side of the sheath seat is provided with a tapered external thread, which matches the internal thread of the hemostatic valve cover and is threadedly connected to the hemostatic valve cover. As a further description of the above technical solution: The annular track is slidably connected to a latch, and the latch has multiple slots on its outer side. The outer side of the positioning rod is engaged with the outer side of the slots. The sheath is fixedly connected to a handle, and the outer side of the handle is in contact with the outer side of the latch. As a further description of the above technical solution: One end of the tension spring is fixedly connected to the outside of the rotating plate, and the other end of the tension spring is fixedly connected to the outside of the annular rail. As a further description of the above technical solution: The outer surface of the blade contacts the outer surface of the sheath, and the outer surface of the limiting cover contacts the outer top end of the annular track.

[0007] This utility model has the following beneficial effects: 1. In this utility model, the hemostatic valve has two convenient installation methods: pressing and threaded tightening. When pressing, the latch slides into the locking groove along the guide rail, and the connection is quickly completed with a "click" sound, which greatly saves surgical preparation time and is suitable for emergency surgical scenarios where every second counts. When threaded tightening is used, the silicone pad at the bottom of the cover is squeezed and deformed to achieve excellent sealing and effectively prevent blood leakage. It is suitable for delicate surgeries with extremely high requirements for sterility and leakage prevention. The two installation methods complement each other, and doctors can flexibly switch between them according to the urgency of the surgery and the precision of the operation, which effectively ensures the smooth progress of the surgery.

[0008] 2. In this utility model, the doctor can push the handle to slide the latch. When the latch slides, the rotating plate squeezes the telescopic rod, which in turn causes the tension spring outside the telescopic rod to deform. The positioning latch will be locked or separated from the slot under the action of the tension spring, thereby realizing the positioning and unlocking of the latch. This makes it convenient for the doctor to operate according to actual needs, and thus can fix the latch.

[0009] 3. In this utility model, the spring blade system integrated in the tearable sheath handle makes the catheter sheath easy to tear. In the blade advancing mechanism, the stainless steel blade with an inclined cutting angle of 30-45° is linked with the spring. During operation, the blade is accurately pushed out under the action of the spring. The elastic reset device uses a medical-grade stainless steel spring with an elastic coefficient of 5-8N / mm. The blade can automatically retract after use, which is convenient for the next operation. The limiting structure strictly controls the cutting depth to only penetrate the outer layer of the sheath through the blade stroke limiting groove with a depth of 1-2mm. After the pre-cutting is completed, only a pulling force needs to be applied along the incision to easily complete the full tear of the sheath. The whole process is convenient and controllable. Attached Figure Description

[0010] Figure 1 This is a three-dimensional schematic diagram of a hemostatic valve and an improved tearable sheath device proposed in this utility model; Figure 2 This is a schematic diagram of the return spring of a hemostatic valve and an improved tearable sheath device proposed in this utility model; Figure 3 This is a schematic diagram of the sheath seat of a hemostatic valve and an improved tearable sheath device proposed in this utility model; Figure 4 This is a schematic diagram of the latch of a hemostatic valve and an improved tearable sheath device proposed in this utility model; Figure 5 This is a schematic diagram of the silicone sealing ring of a hemostatic valve and an improved tearable sheath device proposed in this utility model; Figure 6 This is a schematic diagram of the hemostatic valve cover of the hemostatic valve and the improved tearable sheath device proposed in this utility model.

[0011] Legend: 1. Sheath; 2. Sheath seat; 3. Circular retaining rail; 4. Connecting rod; 5. Limiting cover; 6. Return spring; 7. Blade; 8. Mounting bracket; 9. Connecting shaft; 10. Rotating retaining plate; 11. Telescopic rod; 12. Tension spring; 13. Positioning retaining rod; 14. Tongue; 15. Recess; 16. Handle; 17. Hemostatic valve cover; 18. Silicone sealing ring. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0013] like Figure 6 As shown, a hemostatic valve includes a hemostatic valve cover 17, which is cylindrical in shape. This shape facilitates the grip and operation of medical personnel and is also conducive to connection and sealing with other components. The hemostatic valve cover 17 has an internal thread with extremely high machining precision and low surface roughness, ensuring smooth and unobstructed tightening and effectively preventing leakage caused by poor thread fit. A silicone sealing ring 18 is provided inside the hemostatic valve cover 17. The silicone sealing ring 18 deforms when its bottom is compressed to achieve a seal. The hemostatic valve cover 17 is cylindrical, and an annular flange is provided at the edge of the opening at one end. The annular flange has two main functions: first, it provides a better leverage point for medical personnel when installing and removing the hemostatic valve cover 17, making it easier to apply force for tightening; second, when assembled with the sheath seat 2, the flange can play a role in positioning and strengthening the seal, ensuring that the hemostatic valve cover 17 is accurately connected with the corresponding component and improving the overall sealing performance.

[0014] Working principle: When using the hemostatic valve, the hemostatic valve cover 17 is screwed into the sheath seat 2 with external threads through its internal threads. During the tightening process, the silicone sealing ring 18 at the bottom of the hemostatic valve cover 17 is gradually compressed and undergoes elastic deformation. As the tightening degree increases, the pressure between the silicone sealing ring 18 and the corresponding component contact surface continuously increases until a tight sealing structure is formed, effectively preventing liquid leakage. When it is necessary to remove the hemostatic valve cover 17, medical personnel twist the hemostatic valve cover 17 in the opposite direction to separate it from the sheath seat 2. At this time, the silicone sealing ring 18 returns to its original state, ready for the next use. Example 2

[0015] like Figures 2 to 4As shown, this embodiment provides an improved tearable sheath device, including the hemostatic valve and sheath 1 from Embodiment 1. The surface of the sheath 1 is specially treated to make it smooth and flexible, allowing for easy insertion and movement within the human body while reducing damage to human tissues. Sheath seats 2 are fixedly connected to the left and right sides of the sheath 1. The sheath seats 2 provide a mounting base and support for other components and facilitate operation of the device by medical personnel. An annular retaining rail 3 is fixedly connected to the outside of the sheath seat 2. Precise sliding grooves are provided at the upper and lower ends of the annular retaining rail 3 for sliding engagement with the connecting rod 4. The connecting rod 4 is slidably connected to the upper and lower ends of the annular retaining rail 3. The surface of the connecting rod 4 is polished. To reduce friction between the connecting rod and the annular track 3 groove and ensure smooth sliding, a limit cover 5 is fixedly connected to the top of the connecting rod 4. The function of the limit cover 5 is to prevent the connecting rod 4 from coming out of the annular track 3 groove, ensuring the stability and reliability of the device. A blade 7 is fixedly connected to the other end of the connecting rod 4. The blade 7 is made of sharp medical-grade stainless steel. Its shape is designed according to the requirements of the tear sheath 1. The blade is sharp and specially treated, and has good cutting performance. A return spring 6 is sleeved on the outside of the connecting rod 4. When the connecting rod 4 slides, the return spring 6 will be compressed or stretched to store elastic potential energy. When the external force disappears, the return spring 6 releases the elastic potential energy, so that the connecting rod 4 returns to the initial position. The sheath seat 2 is externally connected to the hemostatic valve cover 17 via a connecting mechanism. The connecting mechanism includes a mounting bracket 8, the size of which is determined according to the installation requirements of the connecting shaft 9 and the rotating clamping plate 10. The mounting bracket 8 is externally fixedly connected to the outside of the annular clamping rail 3, and the connecting shaft 9 is internally fixedly connected to the mounting bracket 8. The surface of the connecting shaft 9 is precision machined to ensure that the rotating clamping plate 10 can rotate flexibly around it. The rotating clamping plate 10 is rotatably connected to the outside of the connecting shaft 9. The telescopic rod 11 consists of an inner rod and an outer tube. A reset assembly is fixedly connected to the left side of the rotating clamping plate 10, and a positioning clamping rod 13 is fixedly connected to the right side of the rotating clamping plate 10. The reset assembly includes a telescopic rod 11, which is externally fixedly connected to the outside of the rotating clamping plate 10. A tension spring is sleeved on the outside of the telescopic rod 11. Spring 12: When the rotating plate 10 rotates around the connecting shaft 9, the tension spring 12 is compressed or stretched, storing elastic potential energy. When the external force disappears, the tension spring 12 releases the elastic potential energy, pushing the rotating plate 10 back to the initial position. The annular track 3 is slidably connected to a latch 14, and the latch 14 has multiple slots 15. The outside of the positioning rod 13 is locked with the outside of the slots 15. The positioning rod 13 can be locked with the outside of the slots 15. The latch 14 is positioned and fixed by this locking method. The sheath 2 is fixedly connected to a handle 16, and the outside of the handle 16 is in contact with the outside of the latch 14. One end of the tension spring 12 is fixedly connected to the outside of the rotating plate 10, and the other end of the tension spring 12 is fixedly connected to the outside of the annular track 3.

[0016] Working principle: First, hold the handle 16 and insert the sheath 1 into the corresponding part of the body. When it is necessary to tear the sheath 1, press down the limiting cover 5, which will drive the connecting rod 4 to slide down and compress the return spring 6. At the same time, the blade 7 moves down to cut the sheath 1. After the cutting is completed, release the limiting cover 5. The return spring 6 pushes the connecting rod 4 to return to its original position. During the operation, the doctor can push the handle 16 to slide the latch 14. When the latch 14 slides, the rotating plate 10 will squeeze the telescopic rod 11, which will cause the tension spring 12 outside the telescopic rod 11 to deform. The positioning latch 13 will be locked or separated from the slot 15 under the action of the tension spring 12, thereby realizing the positioning and unlocking of the latch 14, which is convenient for the doctor to operate according to actual needs. Example 3

[0017] like Figure 1 , Figure 5 As shown, components identical or corresponding to those in Embodiment 2 are referenced using the same reference numerals as in Embodiment 2. For simplicity, only the differences from Embodiment 2 are described below. The difference between Embodiment 3 and Embodiment 2 is that the connecting mechanism includes a sheath seat 2. The outer inner wall of the sheath seat 2 is fixedly connected to the outside of the sheath tube 1. The outer side of the sheath seat 2 is provided with a tapered external thread. The entire tapered external thread area is distributed along a specific circumferential portion of the sheath seat 2 to ensure sufficient engagement length with the internal thread of the hemostatic valve cover 17. The tapered external thread of the sheath seat 2 matches the internal thread of the hemostatic valve cover 17 and is threadedly connected to the hemostatic valve cover 17. When it is necessary to remove the hemostatic valve cover... When the hemostatic valve cover 17 is installed on the sheath seat 2, medical staff only need to align the hemostatic valve cover 17 with the tapered external thread of the sheath seat 2, and then rotate it clockwise. As the rotation proceeds, the internal thread of the hemostatic valve cover 17 gradually engages with the tapered external thread of the sheath seat 2 until it is fully tightened. This threaded connection method is easy to operate and can effectively prevent blood from seeping out from the connection between the sheath 1 and the hemostatic valve cover 17 during medical operations, ensuring the smooth progress of medical operations. After the medical operation is completed, medical staff can rotate the hemostatic valve cover 17 counterclockwise to easily remove it from the sheath seat 2, which facilitates cleaning, disinfection and subsequent maintenance of the device.

[0018] Working principle: When the hemostatic valve cover 17 needs to be installed on the sheath seat 2, the medical staff only need to align the hemostatic valve cover 17 with the tapered external thread of the sheath seat 2, and then rotate it clockwise. As the rotation proceeds, the internal thread of the hemostatic valve cover 17 gradually engages with the tapered external thread of the sheath seat 2 until it is fully tightened.

[0019] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hemostatic valve comprising a hemostatic valve cover (17), characterized in that: The hemostatic valve cover (17) is cylindrical, with an annular flange at one end of the opening edge and internal threads on the inner wall. The hemostatic valve cover (17) is provided with a silicone sealing ring (18) inside. The silicone sealing ring (18) deforms when its bottom is squeezed to achieve a seal.

2. An improved tearable sheath device comprising a hemostatic valve as claimed in claim 1 and a sheath tube (1), characterised in that: Sheath seats (2) are fixedly connected to the left and right sides of the sheath (1). A ring rail (3) is fixedly connected to the outside of the sheath seat (2). A connecting rod (4) is slidably connected to the upper and lower ends of the ring rail (3). A limit cover (5) is fixedly connected to the top of the connecting rod (4). A blade (7) is fixedly connected to the other end of the connecting rod (4). A reset spring (6) is sleeved on the outside of the connecting rod (4). The outside of the sheath seat (2) is connected to the hemostatic valve cover (17) through a connecting mechanism.

3. The improved tearable sheathing device of claim 2, wherein: The connecting mechanism includes a mounting bracket (8), which is fixedly connected to the outside of the annular track (3). A connecting shaft (9) is fixedly connected inside the mounting bracket (8). A rotating plate (10) is rotatably connected to the outside of the connecting shaft (9). A reset component is fixedly connected to the left side of the rotating plate (10), and a positioning rod (13) is fixedly connected to the right side of the rotating plate (10).

4. The improved tearable sheathing device of claim 3, wherein: The reset assembly includes a telescopic rod (11), which is fixedly connected to the outside of the rotating plate (10), and a tension spring (12) is sleeved on the outside of the telescopic rod (11).

5. The improved tearable sheathing device of claim 2, wherein: The connecting mechanism includes a sheath seat (2), the outer inner wall of which is fixedly connected to the outside of the sheath tube (1). The outer side of the sheath seat (2) is provided with a tapered external thread, which matches the internal thread of the hemostatic valve cover (17) and is threadedly connected to the hemostatic valve cover (17).

6. The improved tearable sheathing device of claim 3, wherein: The annular track (3) is slidably connected to a latch (14), and the latch (14) has multiple slots (15) on its outside. The outside of the positioning rod (13) is locked to the outside of the slots (15). The sheath seat (2) is fixedly connected to a handle (16), and the outside of the handle (16) is in contact with the outside of the latch (14).

7. The improved tearable sheathing device of claim 4, wherein: One end of the tension spring (12) is fixedly connected to the outside of the rotating plate (10), and the other end of the tension spring (12) is fixedly connected to the outside of the annular rail (3).

8. The improved tearable sheathing device of claim 2, wherein: The outside of the blade (7) is in contact with the outside of the sheath (1), and the outside of the limiting cover (5) is in contact with the top of the outer end of the annular track (3).

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