A sheath with a protective umbrella

Abstract

The present application provides a sheath with a protective umbrella, comprising a sheath body and a matched sheath core, a plurality of umbrella ribs are arranged in the sheath body, the umbrella ribs have elastic bending ability, one end of all the umbrella ribs is connected with a protective umbrella, the other end of all the umbrella ribs is connected with a moving handle, a channel surrounded by all the umbrella ribs is used for inserting the sheath core, the sheath core is provided with a first groove near a distal end part, an inner ring of one end of the sheath body is provided with a second groove, and the protective umbrella is located in a space between the first groove and the second groove; and an end of the protective umbrella away from the moving handle is a front end wire mesh. The present application adopts a structure of a moving handle for controlling the protective umbrella, a surgeon can decide the release and recovery of the protective umbrella according to the situation, the umbrella ribs play a supporting, moving and releasing role on the protective net; after the recovery of the protective umbrella, the captured debris is wrapped by the front end wire mesh and stored in the sheath port, so as to avoid the obstruction and leakage caused by the debris during the recovery; and the debris captured by the protective umbrella can be captured for a long time during the interventional operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a sheath tube with a protection umbrella. BACKGROUND

[0002] Vascular endovascular intervention surgery is a common treatment for vascular diseases. Surgical operations in the lumen are prone to produce thrombus debris, which can easily be transported to embolize the renal artery, the distal lower extremity and other small arteries via the abdominal aorta. There are few products and patents on sheath tubes with protection umbrellas for thrombectomy surgery to isolate debris on the market. The following is a comparison of several products:

[0003] Chinese invention patent with publication number CN114159125A discloses an abdominal aorta self-expanding horn flower protection umbrella device. The device is used to solve the problem of debris falling caused by abdominal aorta thrombectomy. A protection umbrella is arranged between the inner sheath tube and the outer sheath tube. The protection umbrella is designed as a conical structure with the bottom turned outward. An inner side net bag ring is arranged in the protection umbrella to isolate debris. Although this product can be used to isolate debris, it has the following technical defects: the design of the inner and outer sheath tube layers directly increases the thickness of the sheath tube, which increases the access that can be inserted into the body, seriously affecting the quality of the surgery. In addition, the horn flower structure uses too many bone support nets, which may cause the release of the umbrella device to be blocked during actual surgery, not only affecting the progress of the surgery by the attending physician, but also seriously affecting the progress of the surgery, and even delaying the patient's condition. The release of the protection umbrella by the device is uncontrollable, and if the patient's blood flow is insufficient or the protection umbrella is about to be released, it will be affected by the original thrombus debris in the blood vessel, which will directly cause the protection umbrella to fail to release. The device has high manufacturing process precision requirements and is not easy to manufacture.

[0004] Chinese invention patent with publication number CN113425374A discloses a disposable embolism protection umbrella. The umbrella captures thrombus. The distal end of the distal guide wire is sleeved with a spring that can be extended and retracted along the direction of the distal guide wire. The device is used to solve the problem of debris falling caused by carotid artery thrombectomy. The device can only be used for thrombectomy, and has the following technical defects: the device cannot be used with other surgical instruments in the sheath tube, and it cannot capture thrombus debris for a long time during surgery. The complex structure may also make it difficult to extract large thrombus in special tortuous blood vessels.

[0005] A Chinese invention patent with publication number CN103385744A discloses a temporary filter with a distal protector, which has high safety and is easy to recycle. The sheath has a protection umbrella in a contracted state, which can be displaced along the channel in the sheath. A recycling guide device can be connected with the rear end of the sheath at any time, which is used to solve the problem of preventing the thrombus of the carotid artery from falling off the inferior vena cava. However, the following technical defects exist: the device cannot be used with other surgical instruments in the sheath, the thrombus debris cannot be captured for a long time during the operation, the guide wire of the protection net recycling structure is too much, and the guide wire may be wound when a large thrombus is encountered, so that the sheath cannot be smoothly recovered, which seriously affects the operation quality and causes other postoperative complications.

[0006] Therefore, how to design a sheath with a protection umbrella, which can be controllably used by a surgeon in an interventional operation without affecting the access diameter, captured by the protection umbrella and captured for a long time, and used with other interventional instruments, becomes a problem to be solved. SUMMARY

[0007] In view of the problems in the prior art, the present application provides a sheath with a protection umbrella to solve at least one of the above technical problems.

[0008] The technical scheme of the present application is: a sheath with a protection umbrella, comprising a sheath body and a matched sheath core, a plurality of ribs are arranged in the sheath body, the ribs have elastic bending ability, one end of all the ribs is connected with a protection umbrella, the other end of all the ribs is connected with a moving handle, a channel surrounded by all the ribs is used for inserting the sheath core, the sheath core is provided with a first groove near the distal end, the inner ring of one end of the sheath body is provided with a second groove, and the protection umbrella is located in the space between the first groove and the second groove.

[0009] The structure of the moving handle is used to control the protection umbrella, the surgeon can decide the release and recovery of the protection umbrella according to the situation, the ribs support, move and release the protection net, after the protection umbrella is recovered, the captured debris is wrapped by the front wire mesh, the thrombus debris is stored in the protection umbrella at the sheath port, so that the debris does not cause blockage and leakage during recovery, and the thrombus debris is captured by the protection umbrella and can be captured for a long time in the interventional operation.

[0010] Preferably, the distal end of the sheath core is provided with a first cylinder at the connection position with the sheath core handle, the diameter of the first cylinder is smaller than the diameter of the connection end at both ends, the first groove is an annular groove of the outer ring of the first cylinder, the sheath core comprises a second cylinder in the middle, a transition arc with a clamping groove limiting section is arranged between the second cylinder and the first cylinder, and a conical structure is arranged at the other end of the second cylinder.

[0011] The second groove is added to the inner wall of the sheath tube, the first groove is added to the front end of the sheath core, the two grooves can form the space of the protection umbrella, the protection umbrella is installed, the diameter requirement of the sheath tube in the operation is not affected or the acceptable influence is caused, so that the purpose of releasing the protection umbrella can be achieved without affecting the diameter of the sheath tube.

[0012] Preferably, the other end of the sheath tube body is connected with a fixed handle through a transition conical pipe, both ends of all the umbrella ribs are connected with the protection umbrella and the moving handle respectively, and the moving handle is fixedly connected with the fixed handle.

[0013] The supporting device for supporting the protection umbrella is an integrated structure, the umbrella ribs for supporting the protection umbrella are only four, in the case that the safety and effective riveting of the inner wall of the blood vessel is ensured, the situation that the releasing process is blocked due to the too complex supporting device is greatly avoided, the conical design of the transition conical pipe is to provide a fixed point for the sheath tube when the surgeon pushes the handle, and the conical structure is convenient for the surgeon to fix the sheath tube by fingers in the control stage of the handle.

[0014] Preferably, a smooth transition section is arranged between the second groove and the inner wall of the opening of the sheath tube body, and the end face of the second groove away from the opening side of the sheath tube body limits the protection umbrella.

[0015] The second groove 16 is arranged at the proximal end (front end) of the sheath tube opening, the smooth transition section is convenient for the protection umbrella to release, the second groove limits the protection umbrella, and the protection umbrella can only move to the opening end of the sheath tube. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is an installation structure schematic diagram of the present application.

[0017] Figure 2 It is an installation schematic diagram of the explosion structure of the present application.

[0018] Figure 3 It is an installation structure schematic diagram of the sheath opening of the sheath tube body of the present application.

[0019] Figure 4 It is a connection structure schematic diagram of the sheath core and the sheath core handle of the present application.

[0020] Figure 5 It is an installation structure schematic diagram of the sheath core in the sheath tube body of the present application.

[0021] Figure 6 It is an installation structure schematic diagram of the umbrella rib in the umbrella rib track groove of the present application.

[0022] Figure 7 It is a structure schematic diagram when the protection umbrella of the present application is opened.

[0023] Figure 8Structure diagram of the protection umbrella of the present application being released completely and riveted to the inner wall of the blood vessel.

[0024] Figure 9 Structure diagram of the installation of the fixing handle buckle, the moving push handle buckle and the release button of the present application.

[0025] In the figure: 1. Sheath core; 2. Protection umbrella; 3. Sheath body; 4. Transition conical tube; 5. Fixing handle; 6. Fixing handle buckle; 7. Moving push handle buckle; 8. Moving push handle; 9. Side tube passage; 10. Sheath core buckle; 11. Sheath core handle; 12. Side tube body; 13. Negative pressure device rotating handle; 14. Negative pressure device; 15. First recess; 16. Second recess; 17. Umbrella rib; 18. Umbrella rib track groove; 19. Hook; 20. Front end wire mesh; 21. Release button. DETAILED DESCRIPTION

[0026] The present application will be further described below in combination with the accompanying drawings.

[0027] Reference Figures 1-9 , the structure, proportion, size, etc. shown in the drawings attached to the present specification are only used to cooperate with the content disclosed in the present specification, so as to be understood and read by those skilled in the art, and do not have technical substantive significance, any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect and the purpose that can be achieved by the present application, should still fall within the scope covered by the technical content disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" etc. cited in the present specification are only for the convenience of clear understanding of the description, and are not used to limit the scope of the present application, the change or adjustment of the relative relationship, without substantially changing the technical content, is also regarded as the scope of the present application.

[0028] Example one, a sheath tube with a protection umbrella, reference Figure 1 , Figure 2 , Figure 3, including sheath body 3 and its matching sheath core 1, the sheath body 3 is provided with a plurality of ribs 17, the ribs 17 have elastic bending ability, all the ribs 17 are connected with the protective umbrella 2 at one end, and the other end of all the ribs 17 is connected with the moving handle 8, the channel surrounded by all the ribs 17 is used for inserting the sheath core 1, the sheath core 1 is provided with the first groove 15 close to the distal end part, the sheath body 3 is provided with the second groove 16 in the inner ring of one end, and the protective umbrella 2 is located in the space between the first groove 15 and the second groove 16; the end of the protective umbrella 2 away from the moving handle 8 is the front end wire mesh 20; when the sheath core 1 is inserted into the sheath body 3, the operation in the blood vessel cavity can be carried out. The umbrella structure of the application is controlled by the moving handle, the surgeon can determine the release and recovery of the protective umbrella according to the situation, the ribs support, move and release the protective net; after the protective umbrella is recovered, the captured debris is wrapped by the front end wire mesh, the thrombus debris is stored in the protective umbrella at the sheath port, so that the blockage and leakage caused by the debris during recovery are avoided; in the interventional operation, the debris is captured by the protective umbrella and can be captured for a long time.

[0029] Example two, on the basis of example one, referring to Figure 4 , the distal end of the sheath core 1 is provided with a first cylinder at the connecting part of the sheath core handle 11, the diameter of the first cylinder is smaller than the diameter of the connecting end at both ends, the first groove 15 is an annular groove outside the first cylinder, the sheath core 1 further includes a second cylinder in the middle part, a transition arc with a clamping groove limiting section is arranged between the first cylinder and the second cylinder, and a conical structure is arranged at the other end of the second cylinder. The second groove is added to the inner wall of the sheath tube, the first groove is added to the front end of the sheath core, and the two grooves can form the space of the protective umbrella. The protective umbrella is installed, which does not affect or can acceptably affect the diameter requirement of the sheath port during the operation. Thus, the purpose of releasing the protective umbrella can be achieved without affecting the diameter of the sheath port.

[0030] Example three, on the basis of example two, referring to Figure 5 , the other end of the sheath body 3 is connected and fixed with the fixed handle 5 through the transition conical tube 4, all the ribs 17 are four, the two ends of the four ribs 17 are respectively connected with the protective umbrella 2 and the moving handle 8 as a whole, and the moving handle 8 can be fixedly connected with the fixed handle 5. The supporting device of the supporting protective umbrella is an integral structure, and the ribs supporting the protective umbrella are only four. In the case of ensuring safe and effective riveting of the inner wall of the blood vessel, the release process is prevented from being blocked due to the excessive complexity of the supporting device to the greatest extent. The conical design of the transition conical tube provides a fixed point for the sheath tube for the surgeon when pushing the handle, and the conical structure facilitates the surgeon to fix the sheath tube with fingers during the control of the handle.

[0031] Example four, on the basis of example three, referring to Figure 9The outer ring of the fixed handle 5 is provided with a fixed handle buckle 6, the outer ring of the moving push handle 8 is provided with a moving push handle buckle 7, and the moving push handle buckle 7 can be riveted with the fixed handle buckle 6.

[0032] Example five, on the basis of example four, the end of the moving push handle buckle 7 away from the fixed handle buckle 6 is provided with a release button 21, the release button 21 is connected with the moving push handle buckle 7 through a pin shaft, and the fixed seat of the pin shaft is located on the outer ring of the moving push handle 8.

[0033] Example six, on the basis of example four, referring to Figure 5 , the second groove 16 and the opening inner wall of the sheath body 3 are provided with a smooth transition section, and the end face of the second groove 16 away from the opening side of the sheath body 3 limits the umbrella 2.

[0034] Example seven, on the basis of example four, the sheath body 3 is provided with four umbrella rib track grooves 18, the umbrella ribs 17 are respectively installed in the corresponding umbrella rib track grooves 18, and the entrance end of any one of the umbrella ribs 17 entering the umbrella rib track groove 18 is provided with a sealing ring.

[0035] Example eight, on the basis of example seven, referring to Figure 6 , Figure 7 , the umbrella rib 17 is provided with a hook claw 19 at the end connected with the umbrella 2, the umbrella 2 comprises an elastic net structure wound into a cylindrical shape, the front end wire mesh 20 has a contraction elastic ability, the hook claw 19 is connected with the front end wire mesh 20, and the axial direction of the umbrella 2 is connected with the umbrella rib 17. The umbrella rib transmits the pushing force of the moving push handle to the front end wire mesh, the umbrella releases relies on the elastic potential energy of the umbrella rib itself and the pushing force of the moving push handle, the umbrella recovers relies on the contraction potential energy of the front end wire mesh and the pulling force of the moving push handle, is fixed by the clamping groove of the moving push handle and the fixed handle, the front end wire mesh has a contraction elastic ability, is used for providing a force for capturing captured debris when debris is recycled, has simple structure, and has high process precision.

[0036] In the embodiment nine, the other end of the sheath body 3 is connected with the side tube passage 9, the side tube passage 9 is connected with the negative pressure device 14 through the side tube body 12, and the negative pressure device 14 is further provided with the negative pressure device rotating handle 13; the sheath core handle 11 is provided with the sheath core buckle 10 at the end away from the sheath core 1, the outer circle of the end of the side tube passage 9 away from the sheath body 3 is provided with the clamping groove, the clamping groove is matched with the sheath core buckle 10, the sheath core handle 11 is connected and fixed with the end surface of the side tube passage 9, and the connecting tube is arranged at the end of the side tube passage 9 close to the sheath body 3 and is screwed with the fixed handle 5 through the fine thread or the pipe thread.

[0037] In the specific implementation, the surgeon holds the fixed handle 5 with one hand and holds the moving push handle 8 with the other hand, and pushes the moving push handle 8 to the fixed handle 5, at this time, the protection umbrella 2 is pushed out of the front end of the sheath body 3, the front end wire 20 is a wire-shaped material with elasticity, which is used for facilitating the force dispersion of the hook claw 19 to the elastic net structure; after the protection umbrella 2 is pushed out of the sheath body 3 by the moving push handle 8, the elastic net structure on the protection umbrella 2 will be automatically opened because the front end of the umbrella rib 17 is an elastic bending material. The above design purpose is to transmit the pushing force of the moving push handle 8 to the front end wire 20 through the umbrella rib 17, and then release the protection umbrella 2 by the front end wire 20.

[0038] Reference Figure 8 When the intravascular surgery is performed and the arterial stent angioplasty is implemented, considering the serious adverse events such as stroke caused by the debris falling, the present application needs to solve the technical problem of how to effectively isolate the thrombus debris of the artery falling while the intervention operation is performed, and reduce the risk of tissue ischemia and necrosis caused by the embolism of the small artery at the distal end of the lower limb. In the blood vessel, the moving push handle 8 is manually pushed to drive the protection umbrella 2 to be exposed from one end of the sheath body 3, the four ends of the umbrella rib 17 exposed from the sheath body 3 lose the constraint of the sheath body 3 on the circumferential end, and drive the protection umbrella 2 to move towards the outer circle, so as to open the protection umbrella 2; the protection umbrella 2 is exposed from the sheath body 3 and is opened into a horn structure under the driving of the umbrella rib 17, and the release process is controllable because the protection umbrella 2 does not need to be released by the blood flow force, the large end opening of the horn structure of the protection umbrella 2 can move towards the blood flow direction and collect the thrombus debris in the blood vessel.

[0039] The above is only the preferred embodiment of the present application, and it should be pointed out that the ordinary skilled in the art can make some improvements and refinements without departing from the principles of the present application, and these improvements and refinements should be regarded as the protection scope of the present application.

Claims

1. A sheath with a protective umbrella comprising a sheath body and a matching sheath core, characterized in that: The umbrella sheath body is provided with a plurality of umbrella ribs, the umbrella ribs have elastic bending ability, one end of all the umbrella ribs is connected with a protective umbrella, the other end of all the umbrella ribs is connected with a moving handle, a channel surrounded by all the umbrella ribs is used for inserting a sheath core, the sheath core is provided with a first groove close to a distal end portion, an inner ring of one end of the umbrella sheath body is provided with a second groove, and the protective umbrella is located in a space between the first groove and the second groove; The end of the protective umbrella away from the moving handle is a front end wire mesh; The distal end of the sheath core is provided with a first cylinder at a handle connection position, the diameter of the first cylinder is smaller than the diameter of the two end connection ends, the first groove is an annular groove of the outer ring of the first cylinder, the sheath core further comprises a second cylinder in the middle portion, a transition arc with a clamping groove limiting section is arranged between the first cylinder and the second cylinder, and a conical structure is arranged at the other end of the second cylinder; The other end of the umbrella sheath body is connected with a fixed handle through a transition conical tube, the two ends of all the umbrella ribs are connected with the protective umbrella and the moving handle respectively, and the moving handle can be fixedly connected with the fixed handle; The outer ring of the fixed handle is provided with a fixed handle buckle, the outer ring of the moving handle is provided with a moving handle buckle, and the moving handle buckle can be riveted with the fixed handle buckle; The umbrella sheath body is provided with a plurality of umbrella rib track grooves, and the umbrella ribs are respectively installed in the corresponding umbrella rib track grooves; The end of the umbrella rib connected with the protective umbrella is provided with a hook, the protective umbrella comprises an elastic mesh structure wound into a cylindrical shape, the front end wire mesh has a contraction elastic ability, the hook is connected with the front end wire mesh, and the axial direction of the protective umbrella is connected with the umbrella rib; The other end of the umbrella sheath body is connected with a side tube passage, the side tube passage is connected with a negative pressure device through a side tube body, and the negative pressure device is further provided with a negative pressure device rotating handle.

2. A sheath with a protective umbrella as defined in claim 1, characterized in that: The end of the moving handle buckle away from the fixed handle buckle is provided with an unlocking button, the unlocking button is connected with the moving handle buckle through a pin shaft, and a fixed seat of the pin shaft is located at the outer ring of the moving handle.

3. A sheath with a protective umbrella as defined in claim 1, characterized in that: A smooth transition section is arranged between the second groove and the inner wall of the opening of the umbrella sheath body, and an end surface of the second groove away from the opening side of the umbrella sheath body limits the protective umbrella.

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