Electrocardiosignal acquisition structure of myocardial biopsy forceps

Abstract

The invention relates to the technical field of medical instruments, in particular to an electrocardiosignal acquisition structure of myocardial biopsy forceps. Comprising a sleeve; the tail end of the sleeve is fixedly connected to the control seat; the telescopic movable pipe is connected into the sleeve in a sliding manner; the push-and-pull sliding piece is connected to the control base in a sliding mode, and the tail end of the telescopic movable pipe is fixedly connected to the push-and-pull sliding piece; the conductor wire comprises a first conductor wire, a second conductor wire and an insulating sleeve which wraps the first conductor wire and the second conductor wire and enables the first conductor wire and the second conductor wire to be insulated from each other; the tail end of the electric lead penetrates through the push-pull sliding sleeve to be connected to the tail end of the control base. And the like; by improving an electrocardiosignal acquisition structure of the pair of myocardial biopsy forceps, the pair of myocardial biopsy forceps can more accurately locate the position of a diseased myocardial, and the position of clamping the myocardial is prevented from deviating.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to an electrocardiogram signal acquisition structure of a myocardial biopsy forceps. Background Art

[0002] A Chinese patent with authorization announcement number CN102362808B discloses a myocardial biopsy system with physiological mapping and three-dimensional positioning functions. The system includes a catheter with adjustable distal curvature, a pair of clamps located at the distal end of the catheter, a control handle at the proximal end of the catheter, a tail wire connected to the handle, and an electrophysiological mapping and three-dimensional positioning device. The clamp at the distal end of the catheter is made of metal with good electrical conductivity and serves as a distal mapping electrode. The proximal end of the metal clamp is provided with a plurality of ring electrodes also made of metal with good electrical conductivity. The metal clamp and the ring electrodes are connected to an electrophysiological mapping and three-dimensional positioning system including an electrical signal processing device, a positioning signal processing device, a workstation, and an output device via a tail wire. This patented solution uses a myocardial biopsy forceps combined with electrodes to perform biopsy sampling. In the above patented solution, one of the metal clamps is fixed to the top of the catheter, and the myocardial tissue is clamped only by opening or closing the other metal clamp. This design takes into account that the fixed metal clamp needs to be connected to the electrophysiological mapping device through a wire. If the metal clamp connected to the wire is also movable, then when clamping the myocardial tissue, the position of the clamped myocardium and the position of the diseased myocardium measured by the voltage mapping will be offset, greatly reducing the positive detection rate of the myocardial biopsy, and will cause the connected wire to be pulled in the catheter, affecting stability. Moreover, in the above patent, when clamping the lesion site, the lesion site cannot be accurately further positioned, resulting in the target lesion site easily slipping and offsetting during the clamping process, making it difficult to accurately obtain the target lesion site in the myocardium.

[0003] Therefore, how to improve the ECG signal acquisition structure of the myocardial biopsy forceps so that it can more accurately locate the position of the diseased myocardium and avoid the position of the clamped myocardium from shifting has become a technical problem that needs to be solved urgently. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: how to improve the electrocardiographic signal acquisition structure of the myocardial biopsy forceps so that the position of the diseased myocardium can be more accurately located and the position of the clamped myocardium can be avoided from being offset.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] The ECG signal acquisition structure of the myocardial biopsy forceps includes:

[0007] casing;

[0008] A control seat, the tail end of the sleeve is fixedly connected to the control seat;

[0009] a telescopic movable tube, the telescopic movable tube being slidably connected in the sleeve;

[0010] A push-pull sliding member, wherein the push-pull sliding member is slidably connected to the control seat, and the tail end of the telescopic movable tube is fixedly connected to the push-pull sliding member;

[0011] A conductive wire, the conductive wire comprising a first conductive wire, a second conductive wire, and an insulating sleeve covering the first conductive wire and the second conductive wire to insulate the first conductive wire and the second conductive wire from each other; a tail end of the conductive wire passes through the push-pull sleeve and is connected to the tail end of the control base;

[0012] A positioning mechanism, the positioning mechanism includes a connecting shaft, a first positioning rod and a second positioning rod, the first positioning rod includes a first fixed rod and a first movable rod, the middle portion of the first fixed rod is fixedly connected to one side of the connecting shaft, the tail end of the first fixed rod is connected to the first wire, the tail end of the first movable rod is pivotally connected to the head end of the first fixed rod, and the head end of the first movable rod is a pointed end; the second positioning rod includes a second fixed rod and a second movable rod, the middle portion of the second fixed rod is fixedly connected to the other side of the connecting shaft, the tail end of the second fixed rod is connected to the second wire, the tail end of the second movable rod is pivotally connected to the head end of the second fixed rod, and the head end of the second movable rod is a pointed end; the material of the first positioning rod and the second positioning rod is a conductive metal material, and the material of the connecting shaft is an insulating material;

[0013] A clamp mechanism, the clamp mechanism comprising a first clamp and a second clamp, the middle portion of the first clamp being pivotally connected to the connecting shaft, the middle portion of the second clamp being pivotally connected to the connecting shaft, a gap being formed between the first clamp and the first positioning rod and the second positioning rod, and a gap being formed between the second clamp and the first positioning rod and the second positioning rod;

[0014] The connecting rod mechanism includes a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod, the head end of the first connecting rod is pivoted to the tail end of the first clamp, the tail end of the first connecting rod is pivoted to the head end of the telescopic movable tube, the head end of the second connecting rod is pivoted to the tail end of the second clamp, and the tail end of the second connecting rod is pivoted to the head end of the telescopic movable tube; the head end of the third connecting rod is pivoted to the middle part of the first movable rod, the middle part of the first connecting rod is provided with a first limiting cylinder, the third connecting rod is provided with a first strip hole that slides with the first limiting cylinder, the first limiting cylinder slides with the first strip hole, the middle part of the second connecting rod is provided with a second limiting cylinder, the fourth connecting rod is provided with a second strip hole that slides with the second limiting cylinder, the second limiting cylinder slides with the first strip hole, the material of the fourth connecting rod is insulating material, and the material of the fourth connecting rod is insulating material.

[0015] Furthermore, in the above-mentioned ECG signal acquisition structure of the myocardial biopsy forceps, the control seat is provided with a sliding guide groove, the push-pull sliding member is slidably connected to the sliding guide groove, the control seat is also connected to a reset spring, the head end of the reset spring is connected to the push-pull sliding member, and the tail end of the reset spring is connected to the tail end of the sliding guide groove; the push-pull sliding member is connected to a pull trigger, and the control seat is also connected to a handle for the user to hold.

[0016] Furthermore, in the ECG signal acquisition structure of the myocardial biopsy forceps, the first clamp is provided with a first avoidance groove for avoiding the pivot point between the first movable rod and the third connecting rod, and the second clamp is provided with a second avoidance groove for avoiding the pivot point between the second movable rod and the fourth connecting rod.

[0017] Furthermore, in the above-mentioned ECG signal acquisition structure of the myocardial biopsy forceps, the tip end of the first movable rod is bent inwardly by 5-15 degrees, and the tip end of the second movable rod is bent inwardly by 5-15 degrees.

[0018] Furthermore, in the above-mentioned ECG signal acquisition structure of the myocardial biopsy forceps, a third limiting cylinder is provided at the end of the first limiting cylinder away from the first connecting rod, and the diameter of the third limiting cylinder is greater than the width of the first strip hole.

[0019] Furthermore, in the above-mentioned ECG signal acquisition structure of the myocardial biopsy forceps, a fourth limiting cylinder is provided at the end of the second limiting cylinder away from the second connecting rod, and the diameter of the fourth limiting cylinder is greater than the width of the second strip hole.

[0020] Furthermore, in the above-mentioned electrocardiographic signal acquisition structure of the myocardial biopsy forceps, the first positioning rod and the second positioning rod are made of copper, silver or aluminum.

[0021] Furthermore, in the ECG signal acquisition structure of the myocardial biopsy forceps, in the first state, the push-pull sliding member drives the telescopic movable tube to move toward the tail end, the first connecting rod and the second connecting rod respectively drive the head ends of the first clamp and the second clamp to close, covering the first positioning rod and the second positioning rod, and the third connecting rod and the fourth connecting rod respectively drive the first movable rod of the first positioning rod and the second movable rod of the second positioning rod to move closer to each other without contacting each other;

[0022] In the second state, the push-pull sliding member drives the telescopic movable tube to move toward the head end, the first railing and the second connecting rod respectively drive the head ends of the first clamp and the second clamp to open, exposing the first positioning rod and the second positioning rod, and the third connecting rod and the fourth connecting rod respectively drive the first movable rod of the first positioning rod and the second movable rod of the second positioning rod to open each other.

[0023] The beneficial effects of the present invention are as follows: by controlling the push-pull sliding member, the telescopic movable tube can be driven to telescope and slide within the sleeve, thereby driving the first clamp and the second clamp to open or close through the first connecting rod and the second connecting rod, and driving the first movable rod and the second movable rod to swing through the third connecting rod and the fourth connecting rod, and the swinging direction is coordinated with the opening and closing direction of the first clamp and the second clamp. The ends of the first movable rod and the second movable rod can be used as two electrodes to obtain electrocardiogram signals, thereby accurately locating the diseased myocardial site. During the clamping process, the diseased site can be clamped and positioned by using the relative movement of the first movable rod and the second movable rod, thereby avoiding the position of the clamped myocardium from shifting during the clamping process. Since the conductive wire is relatively stationary when the first clamp and the second clamp are switched between the open or closed state, it will not cause the conductive wire to be pulled. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural schematic diagram of a first state of an electrocardiographic signal acquisition structure of a myocardial biopsy forceps according to a specific embodiment of the present invention;

[0025] Figure 2 for Figure 1 AA cross-section diagram;

[0026] Figure 3 for Figure 1 A magnified view of part B;

[0027] Figure 4 This is a structural schematic diagram of the second state of an ECG signal acquisition structure of a myocardial biopsy forceps according to a specific embodiment of the present invention;

[0028] Figure 5 for Figure 4 CC cross-section diagram;

[0029] Figure 6 for Figure 4 An enlarged view of the D portion;

[0030] Figure 7 A partial cross-sectional view of the connection portion between the first connecting rod and the third connecting rod of the electrocardiographic signal acquisition structure of a myocardial biopsy forceps according to a specific embodiment of the present invention;

[0031] Figure 8 A partial cross-sectional view of the connection portion between the second connecting rod and the fourth connecting rod of the electrocardiographic signal acquisition structure of a myocardial biopsy forceps according to a specific embodiment of the present invention;

[0032] Description of labels:

[0033] 1. Casing;

[0034] 2. Control seat; 21. Sliding guide groove; 22. Return spring; 23. Grip;

[0035] 3. Telescopic movable tube;

[0036] 4. Push and pull the slide; 41. Pull the trigger;

[0037] 5. Conductive wire; 51. First conductor; 52. Second conductor; 53. Insulating sleeve;

[0038] 6. Positioning mechanism; 61. Connecting shaft; 62. First positioning rod; 621. First fixing rod; 622. First movable rod; 63. Second positioning rod; 631. Second fixing rod; 632. Second movable rod;

[0039] 7. Clamping mechanism; 71. First clamp; 711. First avoidance groove; 72. Second clamp; 721. Second avoidance groove;

[0040] 8. Connecting rod mechanism; 81. First connecting rod; 811. First limiting cylinder; 812. Third limiting cylinder; 82. Second connecting rod; 821. Second limiting cylinder; 822. Fourth limiting cylinder; 83. Third connecting rod; 831. First strip hole; 84. Fourth connecting rod; 841. Second strip hole. DETAILED DESCRIPTION

[0041] To illustrate the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and accompanying drawings.

[0042] Please refer to Figures 1 to 8 The specific embodiment of the present invention relates to an electrocardiogram signal acquisition structure of a myocardial biopsy forceps, comprising:

[0043] Casing 1;

[0044] A control seat 2, the tail end of the sleeve 1 is fixedly connected to the control seat 2;

[0045] a telescopic movable tube 3, wherein the telescopic movable tube 3 is slidably connected to the sleeve 1;

[0046] A push-pull sliding member 4 is slidably connected to the control seat 2, and the tail end of the telescopic movable tube 3 is fixedly connected to the push-pull sliding member 4;

[0047] The conductive wire 5 includes a first conductive wire 51, a second conductive wire 52, and an insulating sleeve 53 covering the first conductive wire 51 and the second conductive wire 52 to insulate the first conductive wire 51 and the second conductive wire 52 from each other. The tail end of the conductive wire 5 passes through the push-pull sleeve and is connected to the tail end of the control base 2.

[0048] The positioning mechanism 6 includes a connecting shaft 61, a first positioning rod 62 and a second positioning rod 63. The first positioning rod 62 includes a first fixed rod 621 and a first movable rod 622. The middle part of the first fixed rod 621 is fixedly connected to one side of the connecting shaft 61, the tail end of the first fixed rod 621 is connected to the first wire 51, and the tail end of the first movable rod 622 is pivotally connected to the head end of the first fixed rod 621, and the head end of the first movable rod 622 is a pointed end; the second positioning rod 63 includes a second fixed rod 631 and a second movable rod 632. The middle part of the second fixed rod 631 is fixedly connected to the other side of the connecting shaft 61, the tail end of the second fixed rod 631 is connected to the second wire 52, the tail end of the second movable rod 632 is pivotally connected to the head end of the second fixed rod 631, and the head end of the second movable rod 632 is a pointed end; the material of the first positioning rod 62 and the second positioning rod 63 is a conductive metal material, and the material of the connecting shaft 61 is an insulating material;

[0049] The clamp mechanism 7 includes a first clamp 71 and a second clamp 72. The middle portion of the first clamp 71 is pivotally connected to the connecting shaft 61, and the middle portion of the second clamp 72 is pivotally connected to the connecting shaft 61. There is a gap between the first clamp 71 and the first positioning rod 62 and the second positioning rod 63. There is a gap between the second clamp 72 and the first positioning rod 62 and the second positioning rod 63.

[0050] The connecting rod mechanism 8 includes a first connecting rod 81, a second connecting rod 82, a third connecting rod 83 and a fourth connecting rod 84. The head end of the first connecting rod 81 is pivoted to the tail end of the first clamp 71, and the tail end of the first connecting rod 81 is pivoted to the head end of the telescopic movable tube 3. The head end of the second connecting rod 82 is pivoted to the tail end of the second clamp 72, and the tail end of the second connecting rod 82 is pivoted to the head end of the telescopic movable tube 3; the head end of the third connecting rod 83 is pivoted to the middle part of the first movable rod 622, and the middle part of the first connecting rod 81 is provided with a first limit rod. The third connecting rod 83 is provided with a first strip hole 831 that slides with the first limiting cylinder 811, and the first limiting cylinder 811 slides with the first strip hole 831. The middle part of the second connecting rod 82 is provided with a second limiting cylinder 821. The fourth connecting rod 84 is provided with a second strip hole 841 that slides with the second limiting cylinder 821, and the second limiting cylinder 821 slides with the first strip hole 831. The material of the fourth connecting rod 84 is insulating material. The material of the fourth connecting rod 84 is insulating material.

[0051] Reference Figures 1 to 3In the first state, the push-pull sliding member 4 drives the telescopic movable tube 3 to move toward the rear end, and the first connecting rod 81 and the second connecting rod 82 respectively drive the head ends of the first clamp 71 and the second clamp 72 to close, covering the first positioning rod 62 and the second positioning rod 63. The third connecting rod 83 and the fourth connecting rod 84 respectively drive the first movable rod 622 of the first positioning rod 62 and the second movable rod 632 of the second positioning rod 63 to approach each other but do not touch each other;

[0052] Reference Figures 4 to 6 In the second state, the push-pull sliding member 4 drives the telescopic movable tube 3 to move toward the head end, and the first railing and the second connecting rod 82 respectively drive the head ends of the first clamp 71 and the second clamp 72 to open, exposing the first positioning rod 62 and the second positioning rod 63. The third connecting rod 83 and the fourth connecting rod 84 respectively drive the first movable rod 622 of the first positioning rod 62 and the second movable rod 632 of the second positioning rod 63 to open each other.

[0053] In the above embodiment, the method of use includes:

[0054] Perform right femoral vein puncture, insert a 6F vascular sheath through the right femoral vein, send a loach guidewire to the right ventricular outflow tract, send a pigtail catheter along the guidewire to the right ventricular apex, perform right ventricle angiography at LAO45° and RAO45° respectively, then exchange the adjustable curved sheath to the right atrium and then gradually lower it into the right ventricle across the tricuspid annulus. Under DSA, at RAO30°, follow the adjustable curved sheath (existing technology) to send the ECG signal acquisition structure of the myocardial biopsy forceps through the adjustable curved sheath in the first state to the right ventricle and reach the ventricular septum. Control the push-pull sliding member 4 to move toward the head end, so that the telescopic movable tube 3 moves toward the head end, and the first clamp 71 and the second clamp 72 are driven to open by the first connecting rod 81 and the second connecting rod 82, and the third connecting rod 83 and the fourth connecting rod 84 respectively drive the third connecting rod 84 to open. The first movable rod 622 of a positioning rod 62 and the second movable rod 632 of a second positioning rod 63 are opened to each other, that is, adjusted to the second state. Since the first positioning rod 62 is connected to the first wire 51 and the second positioning rod 63 is connected to the second wire 52, the opened first movable rod 622 and the second movable rod 632 form two electrodes. When contacting the myocardium, the myocardial signal can be obtained through the two electrodes, thereby locating the diseased myocardial site. After obtaining the ECG signal, the ECG signal is transmitted to the tail end through the conductive wire 5, and the tail end can be connected to the electrophysiological mapping device through the connecting line to realize ECG signal monitoring; the positioning needle 6 under LAO45° points to the spine, TTE confirms the position, and RAO30° samples are taken 3 times in the middle septum and the middle and lower septum of the ventricular septum.

[0055] After locating the diseased myocardial site, the push-pull sliding member 4 is controlled to move toward the tail end and adjusted to the first state. At this time, the first connecting rod 81 and the second connecting rod 82 respectively drive the head ends of the first clamp 71 and the second clamp 72 to close, covering the first positioning rod 62 and the second positioning rod 63. The third connecting rod 83 and the fourth connecting rod 84 respectively drive the first movable rod 622 of the first positioning rod 62 and the second movable rod 632 of the second positioning rod 63 to approach each other but not contact each other; in the process of closing the head ends of the first clamp 71 and the second clamp 72, the first movable rod 622 and the second movable rod 632 are close to each other to assist in clamping the diseased site, thereby avoiding the displacement of the position of the clamped myocardium during the clamping process.

[0056] In the above embodiment, by controlling the push-pull slider 4, the telescopic movable tube 3 can be driven to telescopically slide within the cannula 1, thereby driving the first clamp 71 and the second clamp 72 to open or close via the first connecting rod 81 and the second connecting rod 82, and driving the first movable rod 622 and the second movable rod 632 to swing via the third connecting rod 83 and the fourth connecting rod 84, with the swing direction coordinating with the opening and closing directions of the first clamp 71 and the second clamp 72. The ends of the first movable rod 622 and the second movable rod 632 can serve as two electrodes to obtain electrocardiographic signals, thereby accurately locating the diseased myocardial area. During the clamping process, the relative movement of the first movable rod 622 and the second movable rod 632 can be used to clamp and position the diseased area, thereby preventing the position of the clamped myocardium from shifting during the clamping process. Because the conductive wire 5 is relatively stationary when the first clamp 71 and the second clamp 72 switch between the open and closed states, it does not cause the conductive wire 5 to be pulled.

[0057] As a preferred embodiment, the control seat 2 is provided with a sliding guide groove 21, the push-pull sliding member 4 is slidingly connected to the sliding guide groove 21, the control seat 2 is also connected to a return spring 22, the head end of the return spring 22 is connected to the push-pull sliding member 4, and the tail end of the return spring 22 is connected to the tail end of the sliding guide groove 21; the push-pull sliding member 4 is connected to a pull trigger 41, and the control seat 2 is also connected to a handle 23 for the user to hold.

[0058] In the above embodiment, referring to Figure 1 The user can easily switch to the first state by pulling the trigger 41, and when the user releases the trigger, the reset spring 22 can be used to pull the trigger 41 to push and pull the sliding member 4 toward the head end and automatically adjust to the second state. The above structure can reduce the difficulty of operation for the user.

[0059] As a preferred embodiment, the first clamp 71 is provided with a first avoidance groove 711 for avoiding the pivot point between the first movable rod 622 and the third connecting rod 83, and the second clamp 72 is provided with a second avoidance groove 721 for avoiding the pivot point between the second movable rod 632 and the fourth connecting rod 84.

[0060] In the above embodiment, referring to Figure 2 When the first clamp 71 and the second clamp 72 are closed, the first avoidance groove 711 and the second avoidance groove 721 can avoid the pivot point between the second movable rod 632 and the fourth connecting rod 84 and the pivot point between the first movable rod 622 and the third connecting rod 83, so that the first clamp 71 and the second clamp 72 are fully closed.

[0061] As a preferred embodiment, refer to Figure 5 The pointed end of the first movable rod 622 is bent inwardly by 5-15 degrees, and the pointed end of the second movable rod 632 is bent inwardly by 5-15 degrees, which can further improve the stability of assisting in locating the myocardial lesion site.

[0062] Reference Figure 7 A third limiting cylinder 812 is provided at one end of the first limiting cylinder 811 away from the first connecting rod 81. The diameter of the third limiting cylinder 812 is greater than the width of the first strip-shaped hole 831. The third limiting cylinder 812 can serve as an auxiliary limiting function between the first connecting rod 81 and the third connecting rod 83.

[0063] Reference Figure 8 A fourth limiting cylinder 822 is provided at one end of the second limiting cylinder 821 away from the second connecting rod 82. The diameter of the fourth limiting cylinder 822 is greater than the width of the second strip-shaped hole 841. The fourth limiting cylinder 822 can serve as an auxiliary limiting function between the second connecting rod 82 and the fourth connecting rod 84.

[0064] As a preferred embodiment, the first positioning rod 62 and the second positioning rod 63 are made of copper, silver or aluminum.

[0065] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. The electrocardiogram signal acquisition structure of the myocardial biopsy forceps is characterized by: include: casing; A control seat, the tail end of the sleeve is fixedly connected to the control seat; a telescopic movable tube, the telescopic movable tube being slidably connected in the sleeve; A push-pull sliding member, wherein the push-pull sliding member is slidably connected to the control seat, and the tail end of the telescopic movable tube is fixedly connected to the push-pull sliding member; A conductive wire, the conductive wire comprising a first conductive wire, a second conductive wire, and an insulating sleeve covering the first conductive wire and the second conductive wire to insulate the first conductive wire and the second conductive wire from each other; a tail end of the conductive wire passes through the push-pull sleeve and is connected to the tail end of the control base; A positioning mechanism, the positioning mechanism includes a connecting shaft, a first positioning rod and a second positioning rod, the first positioning rod includes a first fixed rod and a first movable rod, the middle portion of the first fixed rod is fixedly connected to one side of the connecting shaft, the tail end of the first fixed rod is connected to the first wire, the tail end of the first movable rod is pivotally connected to the head end of the first fixed rod, and the head end of the first movable rod is a pointed end; the second positioning rod includes a second fixed rod and a second movable rod, the middle portion of the second fixed rod is fixedly connected to the other side of the connecting shaft, the tail end of the second fixed rod is connected to the second wire, the tail end of the second movable rod is pivotally connected to the head end of the second fixed rod, and the head end of the second movable rod is a pointed end; the material of the first positioning rod and the second positioning rod is a conductive metal material, and the material of the connecting shaft is an insulating material; A clamp mechanism, the clamp mechanism comprising a first clamp and a second clamp, the middle portion of the first clamp being pivotally connected to the connecting shaft, the middle portion of the second clamp being pivotally connected to the connecting shaft, a gap being formed between the first clamp and the first positioning rod and the second positioning rod, and a gap being formed between the second clamp and the first positioning rod and the second positioning rod; The connecting rod mechanism includes a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod, the head end of the first connecting rod is pivoted to the tail end of the first clamp, the tail end of the first connecting rod is pivoted to the head end of the telescopic movable tube, the head end of the second connecting rod is pivoted to the tail end of the second clamp, and the tail end of the second connecting rod is pivoted to the head end of the telescopic movable tube; the head end of the third connecting rod is pivoted to the middle part of the first movable rod, the middle part of the first connecting rod is provided with a first limiting cylinder, the third connecting rod is provided with a first strip hole that slides with the first limiting cylinder, the first limiting cylinder slides with the first strip hole, the middle part of the second connecting rod is provided with a second limiting cylinder, the fourth connecting rod is provided with a second strip hole that slides with the second limiting cylinder, the second limiting cylinder slides with the first strip hole, the material of the fourth connecting rod is insulating material, and the material of the fourth connecting rod is insulating material.

2. The electrocardiographic signal acquisition structure of the myocardial biopsy forceps according to claim 1, characterized in that: The control seat is provided with a sliding guide groove, the push-pull sliding piece is slidably connected to the sliding guide groove, the control seat is also connected to a reset spring, the head end of the reset spring is connected to the push-pull sliding piece, and the tail end of the reset spring is connected to the tail end of the sliding guide groove; the push-pull sliding piece is connected to a pull trigger, and the control seat is also connected to a handle for the user to hold.

3. The electrocardiographic signal acquisition structure of the myocardial biopsy forceps according to claim 1, characterized in that: The first clamp is provided with a first avoidance groove for avoiding the pivot point of the second movable rod and the fourth connecting rod, and the second clamp is provided with a second avoidance groove for avoiding the pivot point of the first movable rod and the third connecting rod.

4. The electrocardiographic signal acquisition structure of the myocardial biopsy forceps according to claim 1, characterized in that: The pointed end of the first movable rod is bent inwardly by 5-15 degrees, and the pointed end of the second movable rod is bent inwardly by 5-15 degrees.

5. The electrocardiographic signal acquisition structure of the myocardial biopsy forceps according to claim 1, characterized in that: A third limiting cylinder is provided at one end of the first limiting cylinder away from the first connecting rod, and the diameter of the third limiting cylinder is greater than the width of the first strip-shaped hole.

6. The electrocardiographic signal acquisition structure of the myocardial biopsy forceps according to claim 1, characterized in that: A fourth limiting cylinder is provided at one end of the second limiting cylinder away from the second connecting rod, and the diameter of the fourth limiting cylinder is greater than the width of the second strip-shaped hole.

7. The electrocardiographic signal acquisition structure of the myocardial biopsy forceps according to claim 1, characterized in that: The first positioning rod and the second positioning rod are made of copper, silver or aluminum.

8. The electrocardiographic signal acquisition structure of the myocardial biopsy forceps according to claim 1, characterized in that: In the first state, the push-pull sliding member drives the telescopic movable tube to move toward the tail end, the first connecting rod and the second connecting rod respectively drive the head ends of the first clamp and the second clamp to close, covering the first positioning rod and the second positioning rod, and the third connecting rod and the fourth connecting rod respectively drive the first movable rod of the first positioning rod and the second movable rod of the second positioning rod to approach each other but not contact each other; In the second state, the push-pull sliding member drives the telescopic movable tube to move toward the head end, the first railing and the second connecting rod respectively drive the head ends of the first clamp and the second clamp to open, exposing the first positioning rod and the second positioning rod, and the third connecting rod and the fourth connecting rod respectively drive the first movable rod of the first positioning rod and the second movable rod of the second positioning rod to open each other.

Images