Biopsy forceps and biopsy system

Abstract

The utility model relates to biopsy forceps and a biopsy system.The biopsy forceps comprise a catheter and a forceps head assembly, the forceps head assembly is arranged at the far end of the catheter, a guide tube is integrally formed on the forceps head assembly, and a tube cavity of the guide tube is used for allowing a guide wire to pass through. According to the biopsy forceps, when the guide wire is guided to be inserted into a nipple opening of a focus in advance through the guide tube, compared with an existing distance between the guide tube and the focus, the distance between the guide tube and the focus can be further shortened, and therefore the forceps head assembly can be correspondingly close to the nipple opening of the focus; therefore, the clamp head assembly can be aligned with a nipple opening for sampling through deflection of a small amplitude. The guide tube is connected with the clamp assembly in an integrated forming mode, so that the guide tube is not prone to falling off from the clamp assembly, the guide tube and the clamp assembly are made of the same material such as metal, the guide tube made of the metal material is not prone to deformation, the parallelism of the guide tube and the clamp head assembly is guaranteed, and the clamp head assembly can smoothly reach the focus of infection.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a biopsy forceps and a biopsy system. Background Art

[0002] The biopsy forceps is an indispensable tool for endoscopic examination to obtain pathological specimens. It is inserted into the lesion through the lumen of the endoscope, and then withdrawn from the body after clamping the pathological tissue. The biopsy forceps needs to be guided and supported by the guide wire to reach the lesion smoothly.

[0003] In the related art, in order to facilitate operation, a guide tube is usually bonded or welded to the biopsy forceps, and the guide tube is used for passing a guide wire.

[0004] However, not only is the guide tube not firmly fixed on the clamp head frame, there is a risk of it falling off during clinical use, but the guide tube is also prone to obvious deformation after being combined with the clamp head frame, resulting in poor parallelism between the guide tube and the clamp head frame, and then resulting in a large angle between the guide wire and the clamp head frame, which increases the difficulty of clinical operation, makes it difficult for the clamp head to reach the lesion, and prolongs the operation time. Summary of the invention

[0005] Based on this, it is necessary to provide a living body sampling forceps and a living body sampling system to address the above technical problems.

[0006] A biopsy forceps comprises a catheter and an openable and closable clamp head assembly, the clamp head assembly is used to clamp target tissue, the clamp head assembly is arranged on the distal end of the catheter, a guide tube is integrally formed on the clamp head assembly, and the lumen of the guide tube is used for a guide wire to pass through.

[0007] For the above-mentioned living body sampling forceps, when the guide guide wire is pre-inserted into the nipple opening of the lesion through the guide tube on the clamp assembly, the distance between the guide tube of the present application and the lesion will be further shortened compared to the distance between the existing guide tube and the lesion, so that the clamp head assembly can be correspondingly close to the nipple opening of the lesion, thereby realizing that the clamp head assembly can be aligned with the nipple opening for sampling with a small deflection; in addition, the guide tube of the present application is connected to the clamp assembly in an integrated manner, which can make the guide tube not easy to fall off the clamp assembly, wherein the guide tube and the clamp assembly are made of the same material, for example, both are metal, and the guide tube made of metal is not easy to deform, which ensures the parallelism of the guide tube and the clamp head assembly, so that the clamp head assembly can smoothly reach the lesion, which can reduce the difficulty of clinical operation.

[0008] In one embodiment, the distribution direction of the lumen of the guide tube is parallel to the axial direction of the forceps head assembly.

[0009] In one embodiment, the distal end surface of the clamp head assembly is rounded.

[0010] In one of the embodiments, an end of the guide tube away from the clamp head assembly is provided with a rounded corner.

[0011] In one embodiment, the clamp assembly includes a first clamp member and a second clamp member both rotatably disposed on the catheter, the first clamp member and the second clamp member can cooperate to clamp the target tissue, and the guide tube is disposed on the first clamp member.

[0012] In one embodiment, the maximum radial length L1 of the guide tube is less than or equal to the maximum radial length L2 of the first clamp member.

[0013] In one embodiment, a first accommodating groove is provided on a side of the first clamp member close to the second clamp member, and a second accommodating groove is provided on a side of the second clamp member close to the first clamp member. When the clamp head assembly is closed, the second accommodating groove and the first accommodating groove can cooperate to form a clamping cavity.

[0014] In one embodiment, the first clamping member is further provided with a first pressure relief hole communicating with the first accommodating groove, and the second clamping member is further provided with a second pressure relief hole communicating with the second accommodating groove.

[0015] In one embodiment, a first reinforcing rib is provided on a side of the first clamping member close to the second clamping member, and the first reinforcing rib is arranged around the first pressure relief hole; and / or a second reinforcing rib is provided on a side of the second clamping member close to the first clamping member, and the second reinforcing rib is arranged around the second pressure relief hole.

[0016] A biopsy system comprises a guide wire and the biopsy forceps as described in any one of the above items, wherein the distal end of the guide wire can pass through the lumen of the guide tube of the biopsy forceps.

[0017] In the above-mentioned living body sampling system, when the guide tube on the clamp assembly of the living body sampling forceps is pre-inserted into the nipple opening of the lesion, the distance between the guide tube of the present application and the lesion will be further shortened compared to the distance between the existing guide tube and the lesion, so that the clamp head assembly can be correspondingly close to the nipple opening of the lesion, thereby realizing that the clamp head assembly can be aligned with the nipple opening for sampling with a small deflection; in addition, the guide tube of the present application is connected to the clamp assembly in an integrated manner, which makes it difficult for the guide tube to fall off the clamp assembly, wherein the guide tube and the clamp assembly are made of the same material, for example, both are metal, and the guide tube made of metal is not easy to deform, which ensures the parallelism of the guide tube clamp head assembly, so that the clamp head assembly can smoothly reach the lesion, which can reduce the difficulty of clinical operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the distal end of the biopsy forceps provided in one embodiment of the present application in an open state after being assembled with a guide wire.

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the distal end of the biopsy forceps provided in one embodiment of the present application in a closed state after being assembled with a guide wire.

[0020] Figure 3 A schematic diagram of the three-dimensional structure of the proximal end of a biopsy forceps provided in one embodiment of the present application.

[0021] Figure 4 A simplified diagram of the internal structure of the proximal end of a biopsy forceps provided in one embodiment of the present application.

[0022] The reference numerals in the accompanying drawings are described as follows:

[0023] 10. Living body sampling forceps; 100. Catheter; 200. Forceps head assembly; 210. Guide tube; 220. First clamping member; 220a. First pressure relief hole; 230. Second clamping member; 230a. Second receiving groove; 300. Zipper; 400. Handle assembly; 410. Core rod; 410a. Guide hole; 420. Sliding sleeve; 430. Sliding core; 500. Clamping frame; 500a. Avoidance groove; 600. Connecting rod assembly; 610. First connecting rod; 620. Second connecting rod; 630. Third connecting rod; 640. Fourth connecting rod; 20. Guide wire. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0025] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0026] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0028] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0030] It should be noted that the terms “distal end” and “proximal end” throughout the text are only used to indicate relative positional relationships. The “distal end” of a component refers to the end of the component that enters the patient's body first compared to the other end during normal operation and / or the end that is farther away from the operator, while the “proximal end” refers to the end that enters the patient's body later than the other end and / or the end that is closer to the operator.

[0031] See also Figure 1 An embodiment of the present application provides a biopsy forceps 10, which includes a catheter 100 and an openable and closable forceps head assembly 200. The forceps head assembly 200 is arranged on the distal end of the catheter 100. A guide tube 210 is integrally formed on the forceps head assembly 200. The lumen of the guide tube 210 is used for the guide wire 20 to pass through.

[0032] The above-mentioned biopsy forceps 10 can enter the narrow cavity (such as the bile duct) in the patient's body to perform biopsy. Of course, the above-mentioned biopsy forceps 10 can also enter other lesions in the patient's body, such as the pancreas, kidney, liver, lung, etc. The following takes entering the bile duct as an example to describe how the biopsy forceps 10 cooperates with the guide wire 20: first, the distal end of the guide wire 20 is passed through the guide tube 210 on the clamp head assembly 200, and then the clamp head assembly 200 and the guide wire 20 are entered into the bile duct together, and then the guide wire 20 is operated to be inserted into the nipple of the lesion in advance, and then the biopsy forceps 10 is passed through the through hole 200a on the clamp head assembly 200 along the guide wire 20 to accurately reach the nipple of the lesion, and then the clamp head assembly 200 can be operated to align it with the nipple and perform sampling.

[0033] In the above-mentioned living body sampling forceps 10, when the guide guide wire 20 is pre-inserted into the nipple opening of the lesion through the guide tube 210 on the clamp assembly 200, compared with the distance between the existing guide tube 210 and the lesion, the distance between the guide tube 210 of the present application and the lesion will be further shortened, so that the clamp head assembly 200 can be correspondingly close to the nipple opening of the lesion, so that the clamp head assembly 210 can be aligned with the nipple opening for sampling with a small deflection; in addition, the guide tube 210 of the present application is connected to the clamp assembly 200 in an integrated manner, which makes it difficult for the guide tube 210 to fall off the clamp assembly 200, wherein the guide tube 210 and the clamp assembly 200 are made of the same material, such as metal, and the guide tube 210 made of metal is not easy to deform, which ensures the parallelism of the guide tube 210 and the clamp head assembly 200, so that the clamp head assembly 200 can smoothly reach the lesion, which can reduce the difficulty of clinical operation.

[0034] See also Figure 1 In some embodiments of the present application, the distribution direction of the lumen of the guide tube 210 may be parallel to the axial direction of the clamp head assembly 200. Setting the distribution direction of the lumen of the guide tube 210 in this way can ensure the parallelism between the clamp head assembly 200 and the guide wire 20, and can ensure that the clamp head assembly 200 can smoothly reach the nipple opening of the lesion along the guide wire 20.

[0035] It should be noted that the lumen profile of the guide tube 210 should be compatible with the profile of the guide wire 20. For example, if the cross-section of the guide wire 20 is circular, the lumen cross-section of the guide tube 210 is also circular, and the lumen aperture of the guide tube 210 is equal to or slightly larger than the outer diameter of the guide wire 20; for another example, if the cross-section of the guide wire 20 is rectangular, the lumen cross-section of the guide tube 210 is also rectangular, and the lumen aperture of the guide tube 210 is equal to or slightly larger than the outer diameter of the guide wire 20.

[0036] In some embodiments of the present application, the catheter 100 may be made of a flexible material, such as PU (Polyurethane) or Pebax (polyether block polyamide). The catheter 100 made of a flexible material is convenient for delivery in the patient's body.

[0037] See also Figure 1 In some embodiments of the present application, a side of the guide tube 210 away from the clamp head assembly 200 may be provided with a rounded corner 211. The rounded corner 211 can make the guide wire 20 less likely to be scratched by the guide tube 210. As an example, see Figure 1 The proximal end and the distal end of the guide tube 210 are both provided with rounded corners 211 .

[0038] See also Figure 1In some embodiments of the present application, the distal end surface of the clamp head assembly 200 may be rounded. The structure of the distal end surface of the clamp head assembly 200 is set in this way, so that the distal end of the guide wire 20 will not be scratched by the distal end of the clamp head assembly 200 after passing through the guide tube 210. Optionally, the distal end surface of the clamp head assembly 200 may be hemispherical.

[0039] See also Figure 2 In some embodiments of the present application, the clamp assembly 200 may include a first clamp member 220 and a second clamp member 230 both rotatably disposed on the catheter 100. The first clamp member 220 and the second clamp member 230 can cooperate to clamp the target tissue, and the first clamp member 220 is provided with a guide tube 210. It should be noted that the guide tube 210 may also be provided on the second clamp member 230.

[0040] It should be noted that when the first clamp member 220 and the second clamp member 230 rotate in a direction toward each other, the clamp head assembly 200 can be closed; when the first clamp member 220 and the second clamp member 230 rotate in a direction away from each other, the clamp head assembly 200 can be opened.

[0041] The present application does not impose any specific restrictions on the structures of the first clamping member 220 and the second clamping member 230, as long as they can effectively clamp the target tissue. Figure 1 In the illustrated biopsy forceps 10 , when the first clamping member 220 and the second clamping member 230 are closed, the distal end of the clamp head assembly 200 is in a hemispherical shape, and the other parts of the clamp head assembly 200 are in a cylindrical shape.

[0042] See also Figure 2In some embodiments of the present application, the maximum radial length L1 of the guide tube 210 is less than or equal to the maximum radial length L2 of the first clamp member 220. For example, the maximum radial length L1 of the guide tube 210 may be 0.5 times the maximum radial length L2 of the first clamp member 220, 0.6 times the maximum radial length L2 of the first clamp member 220, 0.7 times the maximum radial length L2 of the first clamp member 220, 0.8 times the maximum radial length L2 of the first clamp member 220, 0.9 times the maximum radial length L2 of the first clamp member 220, or 1.0 times the maximum radial length L2 of the first clamp member 220. It should be noted that the maximum radial length L1 of the guide tube 210 refers to the maximum height of the guide tube 210 in the first direction, which is perpendicular to the axial direction of the guide tube 210; the maximum radial length L2 of the first clamp member 220 refers to the maximum height of the first clamp member 220 in the second direction, which is perpendicular to the axial direction of the first clamp member 220. Setting the maximum radial length L1 of the guide tube 210 in this way can ensure that the guide tube 210 has enough space for the guide wire 20 to pass through, and can also make the overall size of the distal end of the biopsy forceps 10 not too large, thereby ensuring that the distal end of the biopsy forceps 10 can smoothly pass through the narrow cavity. Figure 2 , the maximum radial length L2 of the first clamping member 220 is the same as the maximum radial length L3 of the second clamping member 220 .

[0043] Further, in some embodiments of the present application, see Figure 2 A first receiving groove (not shown in the drawings) is provided on one side of the first clamping member 220 close to the second clamping member 230, and a second receiving groove 230a is provided on one side of the second clamping member 230 close to the first clamping member 220. When the clamp head assembly 200 is closed, the second receiving groove 230a and the first receiving groove can cooperate to form a clamping cavity. After the biopsy forceps 10 has taken the living tissue, the living tissue can be accommodated in the clamping cavity of the clamp head assembly 200, so that the clamp head assembly 200 can be smoothly taken out of the body.

[0044] Further, see Figure 1 In some embodiments of the present application, the first clamping member 220 is further provided with a first pressure relief hole 220a communicating with the first receiving groove, and the second clamping member 230 is further provided with a second pressure relief hole (not shown in the drawings) communicating with the second receiving groove 230a. The provision of the first pressure relief hole 220a and the second pressure relief hole can discharge the gas in the clamping cavity, so that the first clamping member 220 and the second clamping member 230 can clamp the target tissue.

[0045] Regarding the number of the first pressure relief holes 220a, 1, 2, 3 or more may be provided, and the present application does not impose any specific limitation, as long as the pressure relief can be effectively achieved. For example, Figure 1The first clamping member 220 shown is provided with a first pressure relief hole 220 a .

[0046] Similarly, the number of the second pressure relief holes may be 1, 2, 3 or more, and the present application does not impose any specific limitation, as long as the pressure relief can be effectively achieved. For example, the second clamp 230 is provided with 1 second pressure relief hole.

[0047] The shape of the first pressure relief hole 220a can be circular, rectangular, oblong, pentagonal, hexagonal or other polygonal shapes, and the present application does not impose any specific restrictions, as long as the pressure relief can be effectively achieved. For example, Figure 1 The first clamping member 220 shown is provided with an oblong first pressure relief hole 220 a.

[0048] Similarly, the second pressure relief hole may be in a circular, rectangular, oblong, pentagonal, hexagonal or other polygonal shape, and the present application does not impose any specific restrictions, as long as the pressure relief can be effectively provided. For example, the second clamp 230 is provided with an oblong second pressure relief hole.

[0049] A first reinforcing rib is also provided on one side of the first clamp member 220 close to the second clamp member 230, and the first reinforcing rib is arranged around the first pressure relief hole 220a; and / or a second reinforcing rib is also provided on one side of the second clamp member 230 close to the first clamp member 220, and the second reinforcing rib is arranged around the second pressure relief hole. By providing the first reinforcing rib and the second reinforcing rib, the strength of the first clamp member 220 around the first pressure relief hole 220a and the strength of the second clamp member 230 around the second pressure relief hole can be ensured. Optionally, the first reinforcing rib can be provided on the first clamp member 220 in an integrally formed manner, and the second reinforcing rib can also be provided on the second clamp member 230 in an integrally formed manner.

[0050] See also Figure 1 and Figure 2 In some embodiments of the present application, the biopsy forceps 10 may further include a zipper 300, the distal end of which passes through the catheter 100 and is connected to the first clamp member 220 and / or the second clamp member 230, and the zipper 300 can slide along the catheter 100 until the clamp head assembly 200 is opened or closed. As an example, the distal end of the zipper 300 may be connected to the first clamp member 220 and the second clamp member 230 at the same time, and when the zipper 300 slides along the catheter 100, the first clamp member 220 and the second clamp member 230 may simultaneously rotate in a direction close to each other to close the clamp head assembly 200 or simultaneously rotate in a direction away from each other to open the clamp assembly 200.

[0051] Further, see Figure 3In some embodiments of the present application, the biopsy forceps 10 may further include a handle assembly 400; see Figure 3 and Figure 4 The handle assembly 400 includes a core rod 410, a sliding sleeve 420 and a sliding core 430. The sliding core 430 is connected to the proximal end of the sleeve. The sliding core 430 is arranged inside the core rod 410 and connected to the proximal end of the zipper 300. The sliding sleeve 420 is sleeved outside the core rod 410 and connected to the sliding core 430. The sliding sleeve 420 can slide along the axial direction of the core rod 410 and drive the sliding core 430 to slide together during the sliding process. The operator can push the sliding sleeve 420 to make it move along the axial direction of the core rod 410, and the sliding core 430 will slide under the drive of the sliding sleeve 420, thereby driving the zipper 300 to slide along the catheter 100 to open or close the clamp head assembly 200.

[0052] Alternatively, see Figure 3 The core rod 410 may be provided with an axially distributed guide hole 410a, and the outer wall of the sliding core 430 may be provided with a guide block (not shown in the drawings), which passes through the guide hole 410a and is connected to the sliding sleeve 420. Through the cooperation between the guide hole 410a and the guide block, the sliding sleeve 420 can slide along the axial direction of the core rod 410, and can effectively drive the sliding core 430 to slide together during the sliding process.

[0053] Further, see FIG. Figure 2 In some embodiments of the present application, the biopsy forceps 10 further includes a clamp frame 500 and a connecting rod assembly 600. The clamp frame 500 is disposed on the distal end of the catheter 100. The clamp frame 500 is provided with an avoidance through slot 500a. The connecting rod assembly 600 is disposed at the avoidance through hole 500a. The proximal end of the connecting rod assembly 600 is hinged to the zipper 300. The distal end of the connecting rod assembly 600 is hinged to the first clamp member 220 and / or the second clamp member 230 and the clamp frame 500. As an example, the distal end of the connecting rod assembly 600 is hinged to both the first clamp member 220 and the second clamp member 230.

[0054] Optionally, the connecting rod assembly 600 may include a first connecting rod member and a second connecting rod member; Figure 2 The first connecting rod member includes a first connecting rod 610 and a second connecting rod 620 which are hinged to each other, and the second connecting rod member includes a third connecting rod 630 and a fourth connecting rod 640 which are hinged to each other; the distal end of the first connecting rod 610 is hinged to the first clamp member 220 and the clamp frame 500, the distal end of the third connecting rod 630 is hinged to the second clamp member 230 and the clamp frame 500, and the proximal end of the second connecting rod 620 and the proximal end of the fourth connecting rod 640 are hinged to the zipper 300.

[0055] In another embodiment of the present application, a biopsy system is provided, including a guide wire 20 and any one of the biopsy forceps 10 described above. The distal end of the guide wire 20 can pass through the lumen of the guide tube 210 of the biopsy forceps 10 .

[0056] The above-mentioned biopsy system can enter the narrow cavity (such as the bile duct) in the patient's body to perform biopsy. Of course, the above-mentioned biopsy system can also enter other lesions in the patient's body, such as the pancreas, kidney, liver, lung, etc. The following takes entering the bile duct as an example to describe how the biopsy forceps 10 of the biopsy system cooperate with the guide wire 20: first, the distal end of the guide wire 20 is passed through the guide tube 210 on the clamp head assembly 200, and then the clamp head assembly 200 and the guide wire 20 are entered into the bile duct together, and then the guide wire 20 is operated to be inserted into the nipple of the lesion in advance, and then the biopsy forceps 10 is passed through the through hole 200a on the clamp head assembly 200 along the guide wire 20 to accurately reach the nipple of the lesion, and then the clamp head assembly 200 can be operated to align it with the nipple and perform sampling.

[0057] In the above-mentioned living body sampling system, when the guide guide wire 20 is pre-inserted into the nipple opening of the lesion through the guide tube 210 on the clamp assembly 200, compared with the distance between the existing guide tube 210 and the lesion, the distance between the guide tube 210 of the present application and the lesion will be further shortened, so that the clamp head assembly 200 can be correspondingly close to the nipple opening of the lesion, so that the clamp head assembly 210 can be aligned with the nipple opening for sampling with a small deflection; in addition, the guide tube 210 of the present application is connected to the clamp assembly 200 in an integrated manner, which can make the guide tube 210 not easy to fall off from the clamp assembly 200, wherein the guide tube 210 and the clamp assembly 200 are made of the same material, for example, both are metal, and the guide tube 210 made of metal is not easy to deform, which ensures the parallelism of the guide tube 210 and the clamp head assembly 200, so that the clamp head assembly 200 can smoothly reach the lesion, which can reduce the difficulty of clinical operation.

[0058] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A biopsy forceps, It is characterized in that The biopsy forceps (10) comprises a catheter (100) and an openable and closable forceps head assembly (200), wherein the forceps head assembly (200) is used to clamp target tissue, and the forceps head assembly (200) is arranged on the distal end of the catheter (100). A guide tube (210) is integrally formed on the forceps head assembly (200), and the lumen of the guide tube (210) is used for a guide wire (20) to pass through.

2. The biopsy forceps according to claim 1, It is characterized in that The distribution direction of the lumen of the guide tube (210) is parallel to the axial direction of the forceps head assembly (200).

3. The biopsy forceps according to claim 1, It is characterized in that The distal end surface of the clamp head assembly (200) is rounded and smooth.

4. The biopsy forceps according to claim 1, It is characterized in that A rounded corner (211) is provided on one side of the guide tube (210) away from the clamp head assembly (200).

5. The biopsy forceps according to any one of claims 1 to 4, It is characterized in that The clamp head assembly (200) includes a first clamp member (220) and a second clamp member (230) both rotatably arranged on the catheter (100); the first clamp member (220) and the second clamp member (230) can cooperate to clamp the target tissue; the guide tube (210) is arranged on the first clamp member (220).

6. The biopsy forceps according to claim 5, It is characterized in that The maximum radial length L1 of the guide tube (210) is less than or equal to the maximum radial length L2 of the first clamp member (220).

7. The biopsy forceps according to claim 5, It is characterized in that A first receiving groove is provided on a side of the first clamp member (220) close to the second clamp member (230), and a second receiving groove (230a) is provided on a side of the second clamp member (230) close to the first clamp member (220). When the clamp head assembly (200) is closed, the second receiving groove (230a) and the first receiving groove can cooperate to form a clamping cavity.

8. The biopsy forceps according to claim 7, It is characterized in that The first clamping member (220) is also provided with a first pressure relief hole (220a) communicating with the first accommodating groove, and the second clamping member (230) is also provided with a second pressure relief hole communicating with the second accommodating groove (230a).

9. The biopsy forceps according to claim 8, It is characterized in that A first reinforcing rib is also provided on a side of the first clamping member (220) close to the second clamping member (230), and the first reinforcing rib is arranged around the first pressure relief hole (220a); and / or a second reinforcing rib is also provided on a side of the second clamping member (230) close to the first clamping member (220), and the second reinforcing rib is arranged around the second pressure relief hole.

10. A living body sampling system, It is characterized in that The biopsy system comprises a guide wire (20) and the biopsy forceps (10) according to any one of claims 1 to 9, wherein the distal end of the guide wire (20) can pass through the lumen of the guide tube (210) of the biopsy forceps (10).

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