Bending-adjustable capturing device assembly

Abstract

The utility model discloses a bending-adjustable capturing device assembly which comprises a sheathing canal structure, and a capturing structure is arranged in the sheathing canal structure. The capturing structure comprises a braided rope, an alloy elbow is arranged at one end of the braided rope, an arc-shaped rod is fixedly connected to the alloy elbow, and a telescopic rod is arranged on the arc-shaped rod. According to the utility model, the capturing structure is arranged, after the sheathing canal structure is utilized to move the end part of the capturing structure to be close to the position of the filter, a user pushes the braided rope, so that the arc-shaped rod, the telescopic rod and the alloy elbow extend out of the sheathing canal structure, and then the alloy elbow drives the arc-shaped rod and the telescopic rod to rotate to be close to a state of being vertical to the braided rope; then the user moves the sheath tube to drive the capturing structure to sleeve the filter, and then pulls the traction wire to drive the telescopic rod to move, so that the capturing structure is shrunk.

Description

TECHNICAL FIELD

[0001] The utility model relates to surgical instrument technical field especially, relates to a kind of adjustable bending catcher assembly. BACKGROUND

[0002] The inferior vena cava filter is a kind of medical device commonly used for preventing pulmonary embolism, which is placed in the inferior vena cava to capture thrombus and prevent it from entering the pulmonary circulation. However, after a period of filter implantation, it is usually necessary to remove it, at which time a catcher needs to be used to remove the filter implanted in the blood vessel of the patient, and the filter may be embedded or covered by endothelium in the blood vessel, making the removal process challenging and potentially causing damage to the inner wall of the blood vessel or bleeding.

[0003] In the prior art, even if the conventional removal tool is accurately positioned to the filter with the cooperation of the imaging device, the removal tool itself lacks precision and flexibility, which can easily cause damage to the inner wall of the blood vessel of the patient during the removal of the filter, increasing the complexity and risk of the operation. Therefore, we propose an adjustable bending catcher assembly to solve the above problems. SUMMARY

[0004] The utility model aims at solving the problems in the prior art and provides an adjustable bending catcher assembly.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] An adjustable bending catcher assembly includes a sheath structure, and a catcher structure is arranged in the sheath structure.

[0007] The catcher structure includes a braided rope, one end of the braided rope is provided with an alloy elbow, an arc-shaped rod is fixedly connected to the alloy elbow, a contraction rod is arranged on the arc-shaped rod, a traction wire is arranged on the contraction rod, the traction wire penetrates through the braided rope, a guide block is further arranged at the upper end of the braided rope, and a chamfer is arranged on the side of the guide block close to the alloy elbow.

[0008] Preferably, the sheath structure includes a sheath body, an adjustable bending catheter is arranged in the sheath body, the catcher structure is arranged in the adjustable bending catheter, and an expanded port is arranged at one end of the catheter close to the alloy elbow.

[0009] Preferably, one side of the braided rope is provided with a gap, and the traction wire penetrates through the gap.

[0010] Preferably, the alloy elbow is made of a memory alloy material.

[0011] Preferably, the braided rope is tubular, and the braided rope is made of a nickel-titanium alloy wire or a stainless steel wire.

[0012] Preferably, the sheath body and the adjustable bend catheter surface are both coated with a hydrophilic coating.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] The utility model discloses, through setting up capture structure, after the end of this kind of capture structure is moved to filter position vicinity using sheath structure, user pushes the braided rope, makes arc -shaped rod and contraction rod and alloy elbow stretch out from sheath structure, then alloy elbow drives arc -shaped rod and contraction rod and rotates to the state of approaching with braided rope vertical, then user moves sheath and drives capture structure to cover on filter, again pull traction silk, drive contraction rod and move, make capture structure contract, and filter is clamped between contraction rod and arc -shaped rod, finally pull braided rope and take filter in sheath structure, finally take out sheath, complete filter removal operation;

[0015] The utility model discloses, through setting up adjustable bend catheter, can when carrying out filter removal operation, move the more suitable position of capture structure, to ensure the capture effect of capture structure to filter, reduce the damage to patient blood vessel inner wall when filter removal operation, shorten the operation time, reduce the patient's distress. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the main view structural schematic drawing of a kind of adjustable bend capture ware assembly proposed in the utility model;

[0017] Figure 2 It is the internal structure schematic drawing of a kind of adjustable bend capture ware assembly proposed in the utility model;

[0018] Figure 3 It is the flaring structure schematic drawing of a kind of adjustable bend capture ware assembly proposed in the utility model;

[0019] Figure 4 It is the capture structure structural schematic drawing of a kind of adjustable bend capture ware assembly proposed in the utility model.

[0020] In the drawing: 1, sheath structure;11, sheath body;12, adjustable bend catheter;13, flaring;2, capture structure;21, braided rope;22, alloy elbow;23, arc -shaped rod;24, guide block;25, contraction rod;26, traction silk;3, let -go mouth. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments.

[0022] Refer to Figures 1-4An adjustable bending catcher assembly, comprising a sheath structure 1, a catcher structure 2 is arranged in the sheath structure 1;

[0023] The catcher structure 2 comprises a braided rope 21, one end of the braided rope 21 is provided with an alloy elbow 22, and the alloy elbow 22 is fixedly connected with an arc-shaped rod 23, the diameter of the arc-shaped rod 23 is 2-4 cm, the arc-shaped rod 23 is provided with a contraction rod 25, the contraction rod 25 is provided with a traction wire 26, the traction wire 26 is a nickel-titanium alloy braided wire (in a tubular shape), has shape memory and super-elasticity, and the outer diameter becomes smaller when being pulled, and the shape is restored after losing the pulling force, which is a prior art and will not be described in detail here, and the traction wire 26 penetrates through the braided rope 21, the upper end of the braided rope 21 is further provided with a guide block 24, and the side close to the alloy elbow 22 of the guide block 24 is provided with a chamfer;

[0024] In this design, the arc-shaped rod 23 and the contraction rod 25 constitute a loop part for catching the filter, and the alloy elbow 22 is used to drive the loop part to rotate to a state perpendicular to the braided rope 21, so as to facilitate the user to use the catcher structure 2 to catch the filter;

[0025] When the user performs the filter removal operation, first, the sheath structure 1 is used to move the catcher mechanism to the vicinity of the filter, then the catcher mechanism is pushed, so that the loop part composed of the arc-shaped rod 23 and the contraction rod 25 and the alloy elbow 22 are stretched out of the sheath structure 1, then the alloy elbow 22 drives the loop part to rotate, the user moves the sheath to make the loop part wrap around the filter, then the user pulls the traction wire 26 to drive the contraction rod 25 to move towards the braided rope 21, so that the inner diameter of the loop part is reduced, and then the expanded filter is squeezed from the expanded state to the contracted state (the filter is in an umbrella shape when it is expanded in the blood vessel), at this time, the filter is separated from the inner wall of the blood vessel and is tightly clamped by the loop part, the user then pulls the traction wire to drive the catcher structure 2 to move as a whole, so that the catcher structure 2 is accommodated in the sheath structure 1, at this time, the filter is also caught in the sheath structure 1, finally the user takes out the sheath, in this design, on the one hand, the flexible sheath structure 1 drives the catcher structure 2 to move to a suitable position, and on the other hand, the filter can be efficiently accommodated in the sheath structure 1, so as to avoid the filter scratching the inner wall of the blood vessel of the patient and reduce the complexity and risk of the operation.

[0026] Further, the sheath structure 1 comprises a sheath body 11, an adjustable bending catheter 12 is arranged in the sheath body 11, the catcher structure 2 is arranged in the adjustable bending catheter 12, and the end close to the alloy elbow 22 of the catheter is provided with a flared portion 13;

[0027] In the design, the sheath body 11 is a hard structure, and the adjustable bending catheter 12 is a flexible pipe, wherein the bending function of the adjustable bending catheter 12 is realized by using the structure of the adjustable bending sheath in the prior art, and the flared portion 13 is arranged to facilitate the storage of the filter and the collar portion in the flared portion 13 after the filter is captured, so as to avoid that the filter scratches the inner wall of the blood vessel of the patient during the movement of the filter outward after the filter is captured.

[0028] Further, one side of the braided rope 21 is provided with a clearance 3, and the traction wire 26 is arranged through the clearance 3, wherein the clearance 3 is arranged to change the tension direction of the traction wire 26, so as to ensure that the user can drive the collar portion to contract and press the filter when pulling the traction wire 26.

[0029] Further, the alloy elbow 22 is made of a memory alloy material, and the alloy elbow 22 made of the memory alloy material can ensure that the alloy elbow 22 can drive the collar portion to rotate after the alloy elbow 22 is stretched out of the adjustable bending catheter 12.

[0030] Further, the braided rope 21 is tubular, and the braided rope 21 is made of a nickel-titanium alloy wire or a stainless steel wire, which is used to ensure that the capturing device has good flexibility and shape recovery capability, so that the capturing device can effectively capture and remove foreign matters in medical operations.

[0031] Further, the surfaces of the sheath body 11 and the adjustable bending catheter 12 are coated with a hydrophilic coating, and the hydrophilic coating can reduce the friction and the stimulation of the sheath body 11 and the adjustable bending catheter 12 to the inner wall of the blood vessel, so as to reduce the discomfort of the patient.

[0032] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, and any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An adjustable bend catcher assembly, characterized in that: It comprises a sheath structure (1), wherein a capture structure (2) is provided in the sheath structure (1); The capture structure (2) comprises a braided rope (21), an alloy elbow (22) is provided at one end of the braided rope (21), and an arc rod (23) is fixedly connected to the alloy elbow (22), a retractable rod (25) is provided on the arc rod (23), a traction wire (26) is provided on the retractable rod (25), and the traction wire (26) passes through the braided rope (21), and a guide block (24) is further provided at the upper end of the braided rope (21), and a chamfer is provided on the side of the guide block (24) close to the alloy elbow (22).

2. The adjustable bend catcher assembly according to claim 1, characterized in that: The sheath tube structure (1) comprises a sheath tube body (11), an adjustable curved conduit (12) is provided in the sheath tube body (11), the capture structure (2) is located in the adjustable curved conduit (12), and a flared opening (13) is provided at one end of the conduit close to the alloy elbow (22).

3. The adjustable bend catcher assembly according to claim 1, characterized in that: A clearance opening (3) is provided on one side of the braided rope (21), and the traction wire (26) is provided through the clearance opening (3).

4. The adjustable bend catcher assembly according to claim 1, characterized in that: The alloy elbow (22) is made of memory alloy.

5. The adjustable bend catcher assembly according to claim 1, characterized in that: The braided rope (21) is tubular and is braided from nickel-titanium alloy wire or stainless steel wire.

6. The adjustable bend catcher assembly according to claim 2, characterized in that: The surfaces of the sheath tube body (11) and the adjustable bend catheter (12) are both coated with a hydrophilic coating.

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