Medical capturing device

Abstract

The utility model relates to a medical arresting device which comprises a conveying catheter and a pushing guide wire, the pushing guide wire is installed in the conveying catheter in a penetrating mode, a plurality of wire rings are arranged at the front end of the pushing guide wire, each wire ring is of an annular structure, the wire rings are evenly distributed in the circumferential direction of the pushing guide wire, and external threads are arranged on the outer walls of the wire rings. The multiple wire rings expand when penetrating out of the conveying catheter, the multiple expanded wire rings contract from outside to inside when the multiple wire rings retract into the conveying catheter, the multiple wire rings contracting from outside to inside are used for capturing a connecting joint of a guide wire or a plugging device, and meanwhile external threads on the wire rings increase capturing friction force and improve capturing stability. The risk that a guide wire or a plugging device connector is disengaged is reduced, and the capturing stability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and in particular relates to a medical catcher used for catching a guide wire or a fallen occluder during a cardiovascular interventional occlusion operation. Background Art

[0002] Atrial septal defect, ventricular septal defect and patent ductus arteriosus are currently the most common congenital heart diseases. Currently, interventional occlusion is usually used to treat atrial septal defect, ventricular septal defect and patent ductus arteriosus. Interventional occlusion is an interventional treatment that implants an occluder into the defect site of the patient under ultrasound guidance to occlude the defect. Interventional occlusion does not require thoracotomy and can avoid extracorporeal circulation. It has the advantages of less trauma, quick recovery, and definite efficacy. However, the operation requires the establishment of a channel for implanting the occluder. The guidewire needs to be inserted from the patient's arterial end first. The guidewire needs to pass through the abnormal structure of the patient's heart and then come out from the venous end. The guidewire forms the implantation track of the occluder. However, the guidewire is soft and long, making it difficult to operate. In actual operation, after the guidewire is exposed from the arterial end of the patient's heart, another guidewire needs to be inserted from the venous end. The snare is sent into the heart through the guidewire, and the guidewire head exposed from the arterial end is captured by the snare. After the guidewire head passes into the wire loop of the snare, the wire loop is tightened, and then the snare is pulled to pass the guidewire out from the venous end. The operation is relatively cumbersome and difficult to capture.

[0003] In addition, there is a risk of occluder falling off during or after the technical occlusion surgery. Occluder falling off refers to the occluder being separated from its original position due to various reasons during or after the surgery. Under the action of blood flow, heart beats and other thrusts, it moves to other locations such as the heart, valves, and large blood vessels. In severe cases, it can be life-threatening. If the detached occluder cannot be removed through interventional methods, surgical thoracotomy is required for removal, which brings great trauma and risks to the patient. At present, in clinical practice, the snare is still used to remove the detached occluder through intervention. The wire loop of the snare is used to capture the connecting joint located in the center of the occluder. However, the joint is relatively short and difficult to capture. Utility Model Content

[0004] To sum up, in order to overcome the shortcomings of the existing technical problems, the utility model provides a medical capture device, which is equipped with multiple wire loops at the front end of the pushing guide wire, and the wire loops are provided with external threads. The multiple wire loops expand when passing through the delivery catheter, and the multiple wire loops retract into the delivery catheter. The expanded multiple wire loops shrink from the outside to the inside, and the multiple wire loops shrinking from the outside to the inside are used to capture the connecting joint of the guide wire or the occluder. At the same time, the external threads on the wire loops increase the capture friction and improve the capture stability, reduce the risk of the guide wire or the occluder joint coming out, and improve the capture stability.

[0005] In order to solve the above technical problems, the technical solution of the utility model is implemented as follows:

[0006] A medical capture device comprises a delivery catheter and a push guide wire, wherein the push guide wire is inserted into the delivery catheter, wherein: the front end of the push guide wire has a plurality of wire loops, the wire loops are annular structures, the plurality of wire loops are evenly distributed along the circumference of the push guide wire, and the outer wall of the wire loop is provided with an external thread.

[0007] Furthermore, the wire loop is formed by bending a snare wire, both ends of the snare wire are connected to the front end of the push guide wire, and the external thread is arranged along the length direction of the snare wire.

[0008] Furthermore, the snare wire is a memory alloy wire.

[0009] Furthermore, the number of the wire loops is six.

[0010] Furthermore, it also includes an operating component, which includes a holding handle and a pulling handle. The holding handle is fixedly connected to the tail end of the delivery catheter. The holding handle is provided with a pushing hole which is coaxially arranged with the delivery catheter and connected to the inner cavity of the delivery catheter. The pulling handle has a pushing rod which can slide along the pushing hole, and the front end of the pushing rod is fixedly connected to the tail end of the pushing guide wire.

[0011] The beneficial effects of the utility model are:

[0012] The utility model arranges a plurality of wire loops at the front end of the pushing guide wire, and an external thread is arranged on the wire loops. When the plurality of wire loops pass through the delivery catheter, they expand, and when the plurality of wire loops retract into the delivery catheter, the expanded plurality of wire loops shrink from the outside to the inside. The plurality of wire loops shrinking from the outside to the inside are utilized to capture the connecting joint of the guide wire or the occluder. At the same time, the external thread on the wire loop increases the capturing friction and improves the capturing stability, thereby reducing the risk of the guide wire or the occluder joint coming out and improving the capturing stability.

[0013] 2. The utility model has novel concept, simple structure, convenient use and easy operation. It utilizes multiple wire loops after expansion to correspond to the guide wire or the occluder joint. The multiple wire loops after expansion have a larger area and are easy to correspond to the guide wire or the occluder joint. The wire loops that shrink from the outside to the inside and the external threads on the wire loops are used to capture the guide wire or the occluder joint, making the capture operation simple and easy, which can effectively improve the capture success rate and reduce the risk of dislocation during capture, providing convenience for interventional occlusion and also facilitating the removal of the occluder. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the expanded state of multiple wire loops of the utility model. DETAILED DESCRIPTION

[0016] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0017] like Figure 1 and Figure 2 As shown, a medical capture device comprises a delivery catheter 1, a push guide wire 2 and an operating component, wherein the push guide wire 2 is inserted into the delivery catheter 1, and the operating component comprises a holding handle 5 and a pulling handle 7, wherein the holding handle 5 is fixedly connected to the tail end of the delivery catheter 1, and a pushing hole 6 coaxially arranged with the delivery catheter 1 and connected with the inner cavity of the delivery catheter 1 is arranged in the holding handle 5, and the pulling handle 7 has a pushing rod 8 capable of sliding along the pushing hole 6, and the front end of the pushing rod 8 is fixedly connected to the tail end of the pushing guide wire 2, and the front end of the pushing guide wire 2 has six wire loops 3, the wire loops 3 are annular structures, and the six wire loops 3 are evenly distributed along the circumference of the pushing guide wire 2, and the wire loops 3 are formed by bending a snare wire, and the snare wire is a memory alloy wire, and both ends of the snare wire are connected to the front end of the pushing guide wire 2, and an external thread 4 is arranged on the outer wall of the wire loop 3, and the external thread 4 is arranged along the length direction of the snare wire.

[0018] When removing the fallen occluder, the delivery catheter 1 is pulled into the patient's heart along the traction guidewire, and then the guidewire is withdrawn, and the push guidewire 2 is inserted into the delivery catheter 1 from the push hole 6 of the holding handle 5, and the push guidewire 2 is delivered forward. When the wire loop 3 at the front end of the push guidewire 2 is exposed from the front end of the delivery catheter 1, the six wire loops 3 automatically expand, and the delivery catheter 1 is pushed forward so that the expanded wire loop 3 corresponds to the occluder joint, and the occluder joint falls into the expanded wire loop 3. Then the pulling handle 7 is operated to pull the push guidewire 2 outward, and the six wire loops 3 at the front end of the push guidewire 2 shrink from the outside to the inside, and the occluder joint is captured by the contracted six wire loops 3. At the same time, the large capture friction of the external thread 4 on the wire loop 3 improves the capture stability, and the push guidewire 2 is continuously pulled outward until the occluder is removed from the delivery catheter 1.

[0019] It should be noted that the above-described embodiments are illustrative of the technical solution of the utility model rather than limiting. Equivalent substitutions made by ordinary technicians in the relevant technical field or other modifications made according to the prior art should be included in the scope of rights required by the utility model as long as they do not exceed the idea and scope of the technical solution of the utility model.

Claims

1. A medical capture device, comprising a delivery catheter (1) and a push guide wire (2), wherein the push guide wire (2) is inserted into the delivery catheter (1), and characterized in that: The front end of the push guide wire (2) has a plurality of wire loops (3), the wire loops (3) are annular in structure, the plurality of wire loops (3) are evenly distributed along the circumference of the push guide wire (2), and an external thread (4) is provided on the outer wall of the wire loop (3).

2. The medical capture device according to claim 1, characterized in that: The wire loop (3) is formed by bending a snare wire, both ends of the snare wire are connected to the front end of the push guide wire (2), and the external thread (4) is arranged along the length direction of the snare wire.

3. The medical capture device according to claim 2, characterized in that: The snare wire is a memory alloy wire.

4. The medical capture device according to claim 1, characterized in that: The number of the wire loops (3) is six.

5. The medical capture device according to any one of claims 1 to 4, characterized in that: The invention also comprises an operating assembly, wherein the operating assembly comprises a holding handle (5) and a pulling handle (7), wherein the holding handle (5) is fixedly connected to the rear end of the delivery catheter (1), wherein the holding handle (5) is provided with a pushing hole (6) which is coaxially arranged with the delivery catheter (1) and communicated with the inner cavity of the delivery catheter (1), and wherein the pulling handle (7) has a pushing rod (8) which can slide along the pushing hole (6), and wherein the front end of the pushing rod (8) is fixedly connected to the rear end of the pushing guide wire (2).

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