Myocardial biopsy forceps

Abstract

The application discloses a myocardial biopsy forceps, and relates to the technical field of medical devices, which comprises an operating handle and a sampling assembly, the operating handle is used for controlling the sampling assembly to extract atrial septum tissue through a sheath tube and a spring tube; the sampling assembly comprises a forceps head and a ring-shaped cutting edge, the ring-shaped cutting edge is fixedly connected with one end of the sheath tube, the other end of the sheath tube is connected with the operating handle, the spring tube is movably arranged in the sheath tube, one end of the spring tube is fixedly connected with the forceps head, and the other end of the spring tube is connected with the operating handle, and the forceps head is exposed from the sheath tube; a containing groove is arranged on the side of the forceps head facing the ring-shaped cutting edge, the diameter of the containing groove is greater than or equal to the diameter of the ring-shaped cutting edge, and the operating handle is used for controlling the spring tube to move relative to the sheath tube, so that the inner wall of the containing groove abuts against the ring-shaped cutting edge to cut the atrial septum tissue, and the cut atrial septum tissue is located in the space surrounded by the containing groove and the ring-shaped cutting edge. The application solves the problem that the traditional two forceps clamps cannot clamp the thin-walled atrial septum tissue by cutting.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a myocardial biopsy forceps. BACKGROUND

[0002] Myocardial biopsy forceps is a key tool for heart disease diagnosis, which is a device for obtaining myocardial and endocardial tissue samples. Its main function is to obtain myocardial tissue samples for pathological analysis and diagnosis through cardiac surgery or catheter intervention technology.

[0003] Myocardial biopsy forceps has a very wide range of clinical applications. It can be used in cardiac surgery, such as coronary artery bypass grafting, heart valve replacement, etc. By obtaining myocardial tissue samples, doctors can understand the pathological condition of myocardium and guide the operation. Secondly, myocardial biopsy forceps can also be used for the diagnosis of cardiovascular diseases. Through pathological analysis of myocardial tissue samples, the presence and degree of myocarditis, myocardial fibrosis and other diseases can be determined to provide a basis for developing individualized treatment plans for patients.

[0004] Myocardial biopsy forceps is a key instrument for endocardial myocardial biopsy. Its type, technical parameters and application range differ according to different surgical needs and operation paths. The existing biopsy forceps are mainly used for sampling interventricular septum tissue. Because the interventricular septum has folds and a relatively thick wall, it is relatively easy to sample. However, for the atrial septum, its inner wall is smooth and its wall is thin, which is not conducive to the existing biopsy forceps to grasp the tissue. Therefore, there is an urgent need for an atrial sampling biopsy forceps that is simple to operate and safe for pathological analysis. The present application focuses on solving this problem. SUMMARY

[0005] In view of the above-mentioned defects or deficiencies in the prior art, the present application provides a myocardial biopsy forceps.

[0006] To achieve the above-mentioned purpose, the myocardial biopsy forceps of the present application comprises:

[0007] An operating handle and a sampling assembly, the operating handle is used to control the sampling assembly to extract atrial septum tissue through a sheath tube and a spring tube;

[0008] The sampling assembly comprises a forceps head and an annular cutting edge, the annular cutting edge is fixedly connected with one end of the sheath tube, the other end of the sheath tube is connected with the operating handle, the spring tube is movably arranged in the sheath tube, one end of the spring tube is fixedly connected with the forceps head, and the other end is connected with the operating handle, and the forceps head is exposed from the sheath tube;

[0009] An accommodating groove is arranged on the side of the jaw head facing the annular knife edge, the diameter of the accommodating groove is greater than or equal to the diameter of the annular knife edge, the operation handle is used to control the movement of the spring tube relative to the sheath tube, so that the inner wall of the accommodating groove abuts against the annular knife edge to cut the atrial septum tissue, and the cut atrial septum tissue is located in the space surrounded by the accommodating groove and the annular knife edge.

[0010] Preferably, the sampling assembly further comprises a guide rod and a jaw rod, the jaw rod is connected with one end of the spring tube away from the operation handle, the jaw rod is movably connected in the sheath tube, the guide rod penetrates through the jaw head and the jaw rod respectively, and is fixedly connected with the jaw head and the jaw rod respectively, and the jaw head is fixedly connected with one end of the spring tube through the guide rod and the jaw rod.

[0011] The jaw head and the jaw rod are arranged at intervals, and when the annular knife edge cuts the atrial septum tissue, the atrial septum tissue is located in the space surrounded by the accommodating groove, the annular knife edge, the guide rod and the jaw rod.

[0012] Preferably, the operation handle comprises an axial control assembly, the axial control assembly comprises a first handle, a first limiting sleeve, a first sliding block and a first connecting piece, along the axial direction of the first limiting sleeve, the first handle is arranged on both sides of the first limiting sleeve respectively, and one end of the first handle is rotatably connected with the circumferential side wall of the first limiting sleeve.

[0013] The first sliding block is movably arranged in the first limiting sleeve, a first sliding groove is arranged on the circumferential side wall of the first limiting sleeve and penetrates through, one end of the first connecting piece is inserted into the first limiting sleeve through the first sliding groove and is rotatably connected with the first sliding block, and the other end of the first connecting piece is rotatably connected with the first handle.

[0014] The operation handle is used to control the rotation of the first handle in the direction away from the first limiting sleeve, so as to pull one end of the first connecting piece, so that the other end of the first connecting piece controls the axial movement of the first sliding block in the first limiting sleeve, and the first sliding block is fixedly connected with one end of the spring tube away from the sampling assembly.

[0015] Preferably, the operation handle further comprises a circumferential control assembly, the circumferential control assembly comprises a second handle, a second limiting sleeve and a second connecting piece.

[0016] The second connecting piece penetrates through the second handle and the second limiting sleeve respectively, the second connecting piece is fixedly connected with one end of the sheath tube away from the sampling assembly, the second handle is fixedly connected with the second connecting piece, and the second handle is used to control the rotation of the sheath tube.

[0017] The second limiting sleeve is arranged on the side of the second handle away from the sampling assembly and movably connected with the second connecting piece. The second limiting sleeve is circumferentially limitedly connected with the first limiting sleeve.

[0018] Preferably, a first mounting groove is arranged on the end of the first slider facing the sampling assembly, the first mounting groove is used for inserting the spring tube, a first mounting hole is arranged on the circumferential side wall of the first slider, the first mounting hole is in communication with the first mounting groove, the first mounting hole is used for inserting a first pin shaft, the first pin shaft is used for abutting the spring tube to fixedly connect the spring tube with the first slider.

[0019] When one end of the first pin shaft is inserted into the first mounting hole, the other end of the first pin shaft is located in the first sliding groove, the first sliding groove is used for limiting the circumferential rotation of the first slider through the first pin shaft.

[0020] Preferably, a second sliding groove is arranged on the circumferential side wall of the second limiting sleeve, the second sliding groove extends circumferentially to the second limiting sleeve.

[0021] A second slider is arranged on the circumferential side wall of the second connecting piece, when the second limiting sleeve is mounted on the second connecting piece, the second slider is inserted into the second sliding groove, the second sliding groove is used for limiting the rotation angle of the second connecting piece through the second slider.

[0022] Preferably, an elastic member is further arranged in the first limiting sleeve, the elastic member is fixedly connected with the end of the first slider facing the sampling assembly.

[0023] Preferably, a second mounting groove is arranged on the circumferential side wall of the first slider, one end of each of the two first connecting pieces is inserted from two ends of the second mounting groove, and the one end of each of the two first connecting pieces is stacked on each other.

[0024] A second mounting hole is arranged on the circumferential side wall of the first slider, the second mounting hole is in communication with the second mounting groove, the second mounting hole is used for inserting a second pin shaft, the second pin shaft is used for penetrating the one end of each of the two first connecting pieces stacked on each other, so that the two first connecting pieces are rotatably mounted in the first slider.

[0025] Preferably, a first protrusion is arranged on the end of the first limiting sleeve close to the second limiting sleeve, a first insertion slot is arranged on the end of the second limiting sleeve close to the first limiting sleeve, the first insertion slot is used for inserting the first protrusion to limit the rotation of the first limiting sleeve.

[0026] A third mounting hole is arranged through the circumferential side wall of the first and second limiting sleeves, and the third mounting hole is used for inserting a third pin shaft to fix and connect the first and second limiting sleeves.

[0027] Preferably, a third sliding groove and a first scale line are arranged through the circumferential side wall of the first limiting sleeve, the third sliding groove and the first scale line extend along the axial direction of the first limiting sleeve, the first scale line is arranged at the bottom of the third sliding groove, a first mark is arranged on the circumferential side wall of the first sliding block, the first mark is arranged at the bottom of the second mounting hole, the first mark can be exposed from the third sliding groove, and the first scale line and the first mark are used for recording the displacement of the first sliding block.

[0028] A second scale line extending in the axial direction is arranged on the side wall of the sheath, the second scale line is arranged close to the operating handle, and the second scale line is used for recording the displacement of the sheath.

[0029] Based on this, the beneficial effects of the present application are:

[0030] Through the scheme of the present application, the sampling assembly includes a jaw and an annular blade, a containing groove is arranged in the jaw, the jaw can be controlled to axially reciprocate by the operating handle, and then abuts against the annular blade, so that the annular blade cuts the atrial septum tissue, and the cut atrial septum tissue is contained in the containing groove, at this time, the whole is withdrawn from the body to complete the sampling of the atrial septum tissue, and the cutting manner solves the difficulty that the two clamps are not easy to clamp the tissue when the inner wall is smooth and the wall thickness is thin in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0031] Other characteristics, objects and advantages of the present application will become more apparent from the following detailed description of non-restrictive embodiments, made with reference to the attached drawings:

[0032] Figure 1 A structure schematic view of a myocardial biopsy forceps according to an embodiment of the present application is schematically shown;

[0033] Figure 2 A cross-sectional view of a sampling assembly according to an embodiment of the present application is schematically shown;

[0034] Figure 3 、 4 A sampling schematic view of a myocardial biopsy forceps according to an embodiment of the present application is schematically shown;

[0035] Figure 5 A cross-sectional view of an operating handle according to an embodiment of the present application is schematically shown;

[0036] Figure 6Structure diagram of axial control assembly according to an embodiment of the present application;

[0037] Figure 7 Structure diagram of internal structure of axial control assembly according to an embodiment of the present application;

[0038] Figure 8 Structure diagram of circumferential control assembly according to an embodiment of the present application;

[0039] Figure 9 Connection diagram of first and second limiting sleeves according to an embodiment of the present application;

[0040] Figure 10 Structure diagram of first scale line according to an embodiment of the present application;

[0041] Figure 11 Structure diagram of second scale line according to an embodiment of the present application;

[0042] Legend: 10 - operating handle, 101 - axial control assembly, 1011 - first handle, 10111 - grip, 10112 - connecting rod, 10113 - third connecting piece, 10114 - fourth connecting piece, 10115 - second slot, 10116 - second protrusion, 1012 - first limiting sleeve, 10121 - first sliding slot, 10122 - first protrusion, 10123 - third sliding slot, 10124 - first scale line, 1013 - first sliding block, 10131 - first mounting slot, 10132 - first mounting hole, 10133 - first pin, 10134 - second mounting slot, 10135 - second mounting hole, 10136 - second pin, 10137 - first mark, 1014 - first connecting piece, 1015 - elastic piece;

[0043] 102 - circumferential control assembly, 1021 - second handle, 1022 - second limiting sleeve, 10221 - first slot, 10222 - second sliding slot, 1023 - second connecting piece, 10231 - second sliding block, 1024 - fourth mounting hole, 1025 - fourth pin, 103 - third mounting hole, 104 - third pin;

[0044] 20 - sampling assembly, 201 - jaw head, 2011 - accommodating groove, 202 - annular blade, 203 - guide rod, 204 - jaw lever, 205 - positioning block;

[0045] 30 - sheath, 301 - second scale line, 40 - spring tube. DETAILED DESCRIPTION

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms "a," "the," and "the" as used in the embodiments of this application are also intended to include the plural forms unless the context clearly indicates otherwise.

[0048] It should be understood that although the terms first, second, third, etc., may be used to describe related structures in the embodiments of this application, these related structures should not be limited to these terms. These terms are only used to distinguish related structures from each other.

[0049] Depending on the context, the word "if" as used here can be interpreted as "when" or "when". Similarly, depending on the context, the phrase "if determined" can be interpreted as "when determined" or "when (the condition or event of the statement) is detected".

[0050] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should also be understood that when it is mentioned that an element is formed "upper" or "lower" of another element, it can not only be formed directly "upper" or "lower" of the other element, but also indirectly "upper" or "lower" of the other element through an intermediate element.

[0051] Figure 1 This schematic diagram illustrates the structure of a myocardial biopsy forceps according to one embodiment of the present invention. Figure 2 This schematic diagram shows a cross-sectional view of a sampling component according to one embodiment of the present invention. Figure 3 , 4 This schematic diagram illustrates the sampling method of a myocardial biopsy forceps according to one embodiment of the present invention, as shown below. Figures 1-4 As shown, a myocardial biopsy forceps of the present invention includes:

[0052] The operating handle 10 and the sampling assembly 20 are used to control the sampling assembly 20 to extract interatrial septal tissue via the sheath 30 and the spring tube 40.

[0053] The sampling assembly 20 comprises a jaw 201 and a ring blade 202, the ring blade 202 is fixedly connected with one end of the sheath tube 30, the other end of the sheath tube 30 is connected with the operating handle 10, the spring tube 40 is movably arranged in the sheath tube 30, one end of the spring tube 40 is fixedly connected with the jaw 201, the other end is connected with the operating handle 10, and the jaw 201 is exposed from the sheath tube 30;

[0054] A containing groove 2011 is arranged on the side of the jaw 201 facing the ring blade 202, the diameter of the containing groove 2011 is greater than or equal to the diameter of the ring blade 202, and the operating handle 10 is used to control the movement of the spring tube 40 relative to the sheath tube 30, so that the inner wall of the containing groove 2011 abuts against the ring blade 202 to cut the atrial septum tissue, and the cut atrial septum tissue is located in the space surrounded by the containing groove 2011 and the ring blade 202.

[0055] Specifically, a first guide wire (not labeled in the figure) can be arranged inside the device, and the first guide wire can be transported to a designated position through the atrial septum under the guidance of ultrasound along the end of the first guide wire.

[0056] The spring tube 40 is movably arranged in the sheath tube 30, the first guide wire is located in the spring tube 40, the sheath tube 30 and the spring tube 40 are respectively connected with the operating handle 10, and the operating handle 10 is used to control the axial rotation of the sheath tube 30 and the reciprocating movement of the spring tube 40 along the axial direction.

[0057] And one end of the sheath tube 30 is fixedly connected with the ring blade 202, one end of the spring tube 40 is fixedly connected with the jaw 201, when the spring tube 40 is installed in the sheath tube 30, the jaw 201 is exposed from the spring tube 40, and a containing groove 2011 is arranged on the side of the jaw 201 facing the operating handle 10, when the operating handle 10 controls the axial movement of the spring tube 40, the axial movement of the jaw 201 can be controlled synchronously.

[0058] As shown in Figure 3 , 4 When in use, the spring tube 40 is controlled to move axially by the operating handle 10, so that the jaw 201 is elongated and extends into the atrial septum tissue, so that the jaw 201 and the ring blade 202 are respectively located on the two sides of the atrial septum tissue, at this time the spring tube 40 is controlled to retreat by the operating handle 10, thereby pulling the jaw 201 to retreat, thereby pushing the atrial septum tissue to move backward and contact and be cut by the ring blade 202, until the inner wall of the containing groove 2011 abuts against to complete sampling, at this time the cut sampled atrial septum tissue is accommodated in the space surrounded by the containing groove 2011 and the ring blade 202, at this time the whole device is withdrawn to realize the sampling step.

[0059] In this way, the cutting by the ring blade 202 can solve the problem of wall sliding and wall thickness in the conventional technology that cannot be sampled when two jaws are taken, and the whole device is convenient to use and simple to operate.

[0060] Further, as shown in Figure 2 The sampling assembly 20 further comprises a guide rod 203 and a clamp rod 204, the clamp rod 204 is connected with the spring tube 40 at the end away from the operating handle 10, the clamp rod 204 is movably connected in the sheath tube 30, the guide rod 203 penetrates through the clamp head 201 and the clamp rod 204 respectively, and is fixedly connected with the clamp head 201 and the clamp rod 204 respectively, the clamp head 201 is fixedly connected with the spring tube 40 at the end through the guide rod 203 and the clamp rod 204.

[0061] The clamp head 201 is arranged in the space surrounded by the receiving groove 2011, the annular blade 202, the guide rod 203 and the clamp rod 204 when the annular blade 202 cuts the atrial septum tissue.

[0062] Specifically, the clamp head 201 and the guide rod 203, and the clamp rod 204 and the guide rod 203 are welded with each other, and the annular blade 202 is connected with the sheath tube 30 by fusion.

[0063] The positioning block 205 can be arranged at the end of the clamp rod 204, the guide rod 203 further penetrates through the positioning block 205, the positioning block 205 and the clamp rod 204 are welded with each other, the positioning block 205 is used for ensuring that the guide rod 203 is parallel to the axis of the spring tube 40, ensuring that the axis of the clamp head 201 installed on the guide rod 203 is coincident with the axis of the spring tube 40, and ensuring that the edge of the annular blade 202 can extend into the receiving groove 2011.

[0064] When the annular blade 202 cuts the atrial septum tissue, the atrial septum tissue is located in the space surrounded by the receiving groove 2011, the annular blade 202, the guide rod 203 and the positioning block 205.

[0065] Further, Figure 5 The cross-sectional view of the operating handle of the embodiment of the present application is schematically shown, Figure 6 The structural schematic view of the axial control assembly of the embodiment of the present application is schematically shown, Figure 7 The internal structural schematic view of the axial control assembly of the embodiment of the present application is schematically shown, as Figures 5-7 shown:

[0066] The operating handle 10 comprises the axial control assembly 101, the axial control assembly 101 comprises the first handle 1011, the first limiting sleeve 1012, the first sliding block 1013 and the first connecting piece 1014, along the axial direction of the first limiting sleeve 1012, the first handle 1011 is arranged at the two sides of the first limiting sleeve 1012 respectively, and one end of the first handle 1011 is rotatably connected with the circumferential side wall of the first limiting sleeve 1012.

[0067] The first slider 1013 is movably arranged in the first limiting sleeve 1012, and a first sliding groove 10121 is arranged through the circumferential side wall of the first limiting sleeve 1012. One end of the first connecting piece 1014 is inserted into the first limiting sleeve 1012 through the first sliding groove 10121 and is rotationally connected with the first slider 1013. The other end of the first connecting piece 1014 is rotationally connected with the first handle 1011.

[0068] The operation handle 10 is used to control the first handle 1011 to rotate in a direction away from the first limiting sleeve 1012, so as to pull one end of the first connecting piece 1014, so that the other end of the first connecting piece 1014 controls the first slider 1013 to move axially in the first limiting sleeve 1012. The first slider 1013 is fixedly connected with one end of the spring tube 40 away from the sampling assembly 20.

[0069] Specifically, the first handle 1011 includes a grip 10111 and a connecting rod 10112. The grip 10111 is arranged in a ring shape and is used for a doctor to pass his fingers through it. One end of the connecting rod 10112 is rotationally connected with the circumferential side wall of the first limiting sleeve 1012, and the other end is fixedly connected with the grip 10111. By moving the grip 10111 under the control of the doctor, the first handle 1011 can rotate with the connecting rod 10112 as the center.

[0070] Meanwhile, one end of the first connecting piece 1014 is rotationally connected with the middle region of the connecting rod 10112, and the other end is rotationally connected with the first slider 1013. Since the length of the first connecting piece 1014 is fixed, when the first handle 1011 rotates in a direction close to the first limiting sleeve 1012, the first connecting piece 1014 gradually inclines away from the sampling assembly 20, so that the first slider 1013 also moves away from the sampling assembly 20 to pull the spring tube 40, thereby realizing the retreat of the clamp head 201. When the first handle 1011 rotates in a direction away from the first limiting sleeve 1012, the first connecting piece 1014 gradually inclines close to the sampling assembly 20, so that the first slider 1013 also moves close to the sampling assembly 20 to push the spring tube 40, thereby realizing the forward movement of the clamp head 201.

[0071] Furthermore, an elastic element 1015 is also provided inside the first limiting sleeve 1012. The elastic element 1015 is fixedly connected to the end of the first slider 1013 facing the sampling component 20. With this configuration, when the first slider 1013 is retracted, the elastic force of the elastic element 1015 can be used to keep the first slider 1013 in the retracted state, ensuring that the forceps head 201 and the annular blade 202 are always in contact to complete the sampling operation. At the same time, when the first handle 1011 rotates away from the first limiting sleeve 1012 and the first slider 1013 moves axially towards the sampling component 20, the elastic element 1015 can provide resistance to the axial movement of the first slider 1013 to a certain extent, thereby improving the control feel of the first handle 1011 and enabling the doctor to control the force more accurately.

[0072] Furthermore, a first mounting groove 10131 is provided at one end of the first slider 1013 facing the sampling component 20. The first mounting groove 10131 is used for the insertion of the spring tube 40. A through first mounting hole 10132 is provided on the circumferential side wall of the first slider 1013. The first mounting hole 10132 communicates with the first mounting groove 10131. The first mounting hole 10132 is used for the insertion of the first pin 10133. The first pin 10133 is used to abut against the spring tube 40 so that the spring tube 40 is fixedly connected to the first slider 1013.

[0073] When one end of the first pin 10133 is inserted into the first mounting hole 10132, the other end of the first pin 10133 is located in the first slide groove 10121, which is used to restrict the circumferential rotation of the first slider 1013 by means of the first pin 10133.

[0074] Specifically, a through second mounting groove 10134 is provided on the circumferential side wall of the first slider 1013. One end of each of the two first connectors 1014 is inserted from both ends of the second mounting groove 10134. One end of each of the two first connectors 1014 is stacked on top of each other. The second mounting groove 10134 has a certain length, which allows the two first connectors 1014 to tilt within the second mounting groove 10134.

[0075] The first mounting hole 10132 and the second mounting groove 10134 are arranged on the same axis and are located on the side of the second mounting groove 10134 closer to the sampling component 20. The length of the first sliding groove 10121 is set to cover the second mounting groove 10134 and the first mounting hole 10132, so that the first pin 10133 and the first connector 1014 can both pass through the first sliding groove 10121 to circumferentially limit the first pin 10133 and the first connector 1014.

[0076] Meanwhile, a second mounting hole 10135 is arranged on the circumferential side wall of the first slider 1013, the second mounting hole 10135 is communicated with the second mounting slot 10134, the second mounting hole 10135 is used for inserting the second pin shaft 10136, the second pin shaft 10136 is used for penetrating one end of the two first connecting pieces 1014 which are stacked with each other, so that the two first connecting pieces 1014 are rotatably mounted in the first slider 1013.

[0077] When mounted, the two first connecting pieces 1014 are respectively inserted into the first sliding groove 10121 and the second mounting slot 10134 of the first slider 1013 from the circumferential opposite sides of the first limiting sleeve 1012, and the second pin shaft 10136 is inserted into the second mounting hole 10135 and penetrates the two stacked first connecting pieces 1014 at the same time, so that the two first connecting pieces 1014 are rotatably mounted in the first slider 1013.

[0078] In order to be more convenient for installation, a third sliding groove 10123 can be arranged on the circumferential side wall of the first limiting sleeve 1012, when mounted as a whole, the first slider 1013 can be mounted in the first limiting sleeve 1012 first, at this time the first connecting piece 1014 is respectively inserted into the first sliding groove 10121 and the second mounting slot 10134 of the first slider 1013 from the two sides of the first limiting sleeve 1012, and then the second pin shaft 10136 is controlled to be inserted through the third sliding groove 10123 and the second mounting hole 10135, so as to realize the rotary connection of the two first connecting pieces 1014.

[0079] Meanwhile, the third sliding groove 10123 extends in the axial direction of the first limiting sleeve 1012 for a certain distance, when the first slider 1013 moves in the axial direction, the end part of the second pin shaft 10136 which extends out of the second mounting hole 10135 can move in the axial direction in the third sliding groove 10123, and will not rub or block each other with the inner wall of the first limiting sleeve 1012, so as to avoid causing resistance to the axial movement of the first slider 1013.

[0080] Further, Figure 8 a structural schematic view of a circumferential control assembly according to an embodiment of the present application is shown, Figure 9 a connection schematic view of a first limiting sleeve and a second limiting sleeve according to an embodiment of the present application is shown, Figure 8 , 9 as shown in the following figure:

[0081] The operating handle 10 further comprises a circumferential control assembly 102, the circumferential control assembly 102 comprises a second handle 1021, a second limiting sleeve 1022 and a second connecting piece 1023.

[0082] The second connecting piece 1023 penetrates the second handle 1021 and the second limiting sleeve 1022 respectively, and the second connecting piece 1023 is fixedly connected with the end of the sheath tube 30 away from the sampling assembly 20, the second handle 1021 is fixedly connected with the second connecting piece 1023, and the second handle 1021 is used for controlling the rotation of the sheath tube 30.

[0083] The second limiting sleeve 1022 is arranged on the side of the second handle 1021 away from the sampling assembly 20, and is movably connected with the second connecting piece 1023, and the second limiting sleeve 1022 is circumferentially limitedly connected with the first limiting sleeve 1012.

[0084] Specifically, the fourth mounting hole 1024 is arranged on the circumferential side wall of the second connecting piece 1023 and the second handle 1021, the fourth mounting hole 1024 is used for the fourth pin shaft 1025 to be inserted, when the second connecting piece 1023 penetrates the second handle 1021, and the positions of the two fourth mounting holes 1024 correspond, the second connecting piece 1023 is fixedly connected with the second handle 1021 by inserting the fourth pin shaft 1025 into the fourth mounting hole 1024, and the second connecting piece 1023 is fixedly connected with the sheath tube 30, at this time, the second handle 1021 can be rotated to control the synchronous rotation of the second connecting piece 1023 to drive the sheath tube 30 to rotate, so as to realize the adjustment of the angle of the sheath tube 30.

[0085] Meanwhile, the second guide wire (not shown in the figure) can be arranged in the sheath tube 30, and the guide wire through hole (not marked in the figure) can be arranged on the circumferential side wall of the second connecting piece 1023, the second guide wire can be extended out of the second connecting piece 1023 through the guide wire through hole, at this time, the doctor can realize the bending operation of the sheath tube 30 by pulling the second guide wire, and the second handle 1021 is rotated synchronously, so as to control the bending direction of the sheath tube 30 synchronously.

[0086] The protruding anti-skid structure (not shown in the figure) can be arranged on the circumferential side wall of the second handle 1021, the anti-skid structure is arranged in multiple and is arranged in intervals along the circumference, and can assist the doctor to control the rotation of the second handle 1021, so as to control the rotation through the grasping fulcrum.

[0087] Further, the second connecting piece 1023 is installed through the second limiting sleeve 1022 and the first limiting sleeve 1012, the first protruding block 10122 is arranged on the end of the first limiting sleeve 1012 close to the second limiting sleeve 1022, the first insertion slot 10221 is arranged on the end of the second limiting sleeve 1022 close to the first limiting sleeve 1012, and the first insertion slot 10221 is used for the first protruding block 10122 to be inserted, so as to limit the rotation of the first limiting sleeve 1012.

[0088] Specifically, a third mounting hole 103 is arranged on the circumferential side wall of the first and second limiting sleeves 1012 and 1022, and the third mounting hole 103 is used for inserting the third pin shaft 104 to fixedly connect the first limiting sleeve 1012 and the second limiting sleeve 1022.

[0089] Further, the length of the first protrusion 10122 is greater than the diameter of the first limiting sleeve 1012, so that the two ends of the first protrusion 10122 can respectively protrude from the circumferential side wall of the first limiting sleeve 1012, and the protruding part of the first protrusion 10122 is used for mounting the first connecting piece 1014, when the first connecting piece 1014 is located at the side of the protruding part of the first protrusion 10122, the fifth pin shaft (not marked in the figure) is inserted to realize the rotary connection of the first connecting piece 1014 on the first protrusion 10122.

[0090] Further, a second sliding groove 10222 is arranged on the circumferential side wall of the second limiting sleeve 1022, and the second sliding groove 10222 extends circumferentially to the second limiting sleeve 1022;

[0091] A second sliding block 10231 is arranged on the circumferential side wall of the second connecting piece 1023, when the second limiting sleeve 1022 is mounted on the second connecting piece 1023, the second sliding block 10231 is inserted into the second sliding groove 10222, when the doctor controls the second handle 1021 to rotate to drive the second connecting block 1023 to rotate synchronously, the second sliding block 10231 moves circumferentially along the second sliding groove 10222, the two ends of the second sliding groove 10222 in the axial direction can limit the axial movement of the second limiting sleeve 1022 relative to the second connecting piece 1023, and the two ends of the second sliding groove 10222 in the circumferential direction can limit the rotation angle of the second connecting piece 1023, thereby assisting the doctor to operate.

[0092] Further, as Figure 5As shown, the third connecting piece 10113 and the fourth connecting piece 10114 are respectively arranged on the surfaces of the two first handles 1011 facing each other, the second slot 10115 is arranged on the third connecting piece 10113, and the second protrusion 10116 is arranged on the fourth connecting piece 10114, the second slot 10115 is used for inserting the second protrusion 10116, so as to fixedly connect the two first handles 1011, in this way, before cutting the septal tissue of the sampling assembly 20, the two first handles 1011 can be always controlled to be close to each other by connecting the third connecting piece 10113 and the fourth connecting piece 10114, so that the first slider 1013 is always in the retracted state, and then the annular blade 202 and the clamp head 201 are always in the closed abutting state, thereby avoiding that the two first handles 1011 are away from each other due to the misoperation of the doctor when the whole sampling assembly is withdrawn after sampling, so that the clamp head 201 and the annular blade 202 are separated, the septal tissue in the accommodation groove 2011 falls or enters the sundries to affect the sampling result, and the precision of sampling the sampling tissue is ensured.

[0093] Further, Figure 10 a structural schematic view of a first scale line in an embodiment of the application, Figure 11 a structural schematic view of a second scale line in an embodiment of the application, as Figure 10 、 11 As shown:

[0094] The first scale line 10124 is arranged on the circumferential side wall of the first limiting sleeve 1012, the third sliding groove 10123 and the first scale line 10124 extend along the axial direction of the first limiting sleeve 1012, the first scale line 10124 is correspondingly arranged at the bottom of the third sliding groove 10123, the first mark 10137 is arranged on the circumferential side wall of the first slider 1013, the first mark 10137 is correspondingly arranged at the bottom of the second mounting hole 10135, and the first mark 10137 can be exposed from the third sliding groove 10123.

[0095] When the first slider 1013 moves axially, the cooperation between the first mark 10137 and the first scale line 10124 can assist the doctor in recording the displacement of the axial movement of the first slider 1013 and assisting the operation, when the first mark 10137 moves to one end of the first scale line 10124 close to the sampling assembly 20, that is, when the clamp head 201 and the annular blade 202 are separated by the maximum interval, and when the first mark 10137 moves to one end of the first scale line 10124 away from the sampling assembly 20, that is, when the clamp head 201 and the annular blade 202 are in close contact to cut the septal tissue.

[0096] Further, the second scale line 301 extending axially is arranged on the side wall of the sheath 30, the second scale line 301 is arranged close to the operating handle 10, and the second scale line 301 can assist the doctor in recording the displacement of the sheath 30, and precisely control the distance of the whole device extending into the patient's body.

[0097] In this way, the myocardial biopsy forceps of the present application solves the problem that it is not easy to clamp the thin wall slip and other tissues by using two forceps in the prior art by the way that the annular blade 202 and the forceps head 201 abut each other to cut the interatrial septum tissue. Meanwhile, the present application provides a first handle 1011 arranged axially, and the two first handles 1011 are arranged away from the first limiting sleeve 1012 and away from the rotation, so as to realize the effect that the first sliding block 1013 moves axially to control the annular blade 202 to cut the interatrial septum tissue. This way and the corresponding control structure are more in line with the operation habits of doctors using surgical knives and other instruments, and provide convenience for doctors to use, and improve the safety of the operation.

[0098] The above description is only the preferred embodiment of the present application. Those skilled in the art should understand that the disclosure range involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features disclosed in the present application (but not limited to) having similar functions to form technical solutions.

Claims

1. A myocardial biopsy forceps, characterized in that, include: An operating handle and a sampling assembly, wherein the operating handle is used to control the sampling assembly to extract interatrial septal tissue via a sheath and a spring tube; The sampling assembly includes a clamp head and an annular blade. The annular blade is fixedly connected to one end of the sheath, and the other end of the sheath is connected to the operating handle. The spring tube is movably disposed inside the sheath, with one end of the spring tube fixedly connected to the clamp head and the other end connected to the operating handle. The clamp head protrudes from the sheath. A receiving groove is provided on the side of the pliers head facing the annular blade. The diameter of the receiving groove is greater than or equal to the diameter of the annular blade. The operating handle is used to control the movement of the spring tube relative to the sheath tube so that the inner wall of the receiving groove abuts against the annular blade to cut the interatrial septum tissue. The cut interatrial septum tissue is located in the space surrounded by the receiving groove and the annular blade. The operating handle includes an axial control component, which includes a first handle, a first limiting sleeve, a first slider, and a first connector. Along the axial direction of the first limiting sleeve, the first handle is respectively disposed on both sides of the first limiting sleeve, and one end of the first handle is rotatably connected to the circumferential sidewall of the first limiting sleeve. The first slider is movably disposed inside the first limiting sleeve. A through first groove is provided on the circumferential side wall of the first limiting sleeve. One end of the first connector is inserted into the first limiting sleeve through the first groove and is rotatably connected to the first slider. The other end of the first connector is rotatably connected to the first handle. The operating handle is used to control the first handle to rotate away from the first limiting sleeve, so as to pull one end of the first connector, so that the other end of the first connector controls the first slider to move axially within the first limiting sleeve. The first slider is fixedly connected to the end of the spring tube away from the sampling assembly.

2. The myocardial biopsy forceps according to claim 1, characterized in that, The sampling assembly further includes a guide rod and a clamp rod. The clamp rod is connected to the end of the spring tube away from the operating handle. The clamp rod is movably connected inside the sheath. The guide rod passes through the clamp head and the clamp rod respectively and is fixedly connected to the clamp head and the clamp rod respectively. The clamp head is fixedly connected to one end of the spring tube through the guide rod and the clamp rod. The clamp head and clamp bar are spaced apart. When the annular blade cuts the atrial septum tissue, the atrial septum tissue is located within the space surrounded by the receiving groove, the annular blade, the guide rod, and the clamp bar.

3. The myocardial biopsy forceps according to claim 1, characterized in that, The operating handle also includes a circumferential control component, which includes a second handle, a second limiting sleeve, and a second connecting member. The second connector passes through the second handle and the second limiting sleeve respectively. The second connector is fixedly connected to the end of the sheath away from the sampling component. The second handle is fixedly connected to the second connector. The second handle is used to control the rotation of the sheath. The second limiting sleeve is disposed on the side of the second handle away from the sampling component and is movably connected to the second connecting member. The second limiting sleeve is circumferentially limited and connected to the first limiting sleeve.

4. A myocardial biopsy forceps according to claim 1, characterized in that, A first mounting groove is provided at one end of the first slider facing the sampling component. The first mounting groove is used for the insertion of the spring tube. A first mounting hole is provided on the circumferential sidewall of the first slider. The first mounting hole communicates with the first mounting groove. The first mounting hole is used for the insertion of a first pin. The first pin is used to abut against the spring tube so that the spring tube is fixedly connected to the first slider. When one end of the first pin is inserted into the first mounting hole, the other end of the first pin is located in the first slide groove, which is used to restrict the circumferential rotation of the first slider by means of the first pin.

5. A myocardial biopsy forceps according to claim 3, characterized in that, A through-groove is provided on the circumferential sidewall of the second limiting sleeve, and the second groove extends circumferentially toward the second limiting sleeve. A second slider is provided on the circumferential sidewall of the second connector. When the second limiting sleeve is installed on the second connector, the second slider is inserted into the second slide groove. The second slide groove is used to limit the rotation angle of the second connector by means of the second slider.

6. A myocardial biopsy forceps according to claim 1, characterized in that, An elastic element is also provided inside the first limiting sleeve, and the elastic element is fixedly connected to the end of the first slider facing the sampling component.

7. A myocardial biopsy forceps according to claim 1, characterized in that, A through second mounting groove is provided on the circumferential sidewall of the first slider. One end of each of the two first connectors is inserted into the two ends of the second mounting groove, and one end of each of the two first connectors is stacked on top of each other. A second mounting hole is provided on the circumferential sidewall of the first slider. The second mounting hole communicates with the second mounting groove. The second mounting hole is used for inserting a second pin. The second pin is used to pass through one end of the two first connectors that are stacked on top of each other, so that the two first connectors are rotatably installed in the first slider.

8. A myocardial biopsy forceps according to claim 3, characterized in that, A first protrusion is provided at one end of the first limiting sleeve near the second limiting sleeve, and a first slot is provided at one end of the second limiting sleeve near the first limiting sleeve. The first slot is used for inserting the first protrusion to restrict the rotation of the first limiting sleeve. A third mounting hole is provided on the circumferential sidewall of the first limiting sleeve and the second limiting sleeve. The third mounting hole is used for the insertion of a third pin to fix the first limiting sleeve and the second limiting sleeve together.

9. A myocardial biopsy forceps according to claim 7, characterized in that, A through third groove and a first scale line are provided on the circumferential sidewall of the first limiting sleeve. The third groove and the first scale line extend along the axial direction of the first limiting sleeve. The first scale line is correspondingly provided at the bottom of the third groove. A first mark is provided on the circumferential sidewall of the first slider. The first mark is correspondingly provided at the bottom of the second mounting hole. The first mark can be exposed from the third groove. The first scale line and the first mark are used to record the displacement of the first slider. A second scale line extending axially is provided on the side wall of the sheath tube, and the second scale line is located near the operating handle. The second scale line is used to record the displacement of the sheath tube.

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