A visual biopsy forceps

Abstract

The utility model discloses a visual biopsy forceps, which includes a sleeve assembly, two clamp head assemblies, and an ultrasonic catheter; the sleeve assembly is hollow to form a central channel extending in the axial direction, and the sleeve assembly is provided with an instrument channel connected to the central channel; the two clamp head assemblies are relatively arranged at the front end of the sleeve assembly, and the two clamp head assemblies can be relatively opened and closed to clamp biopsy samples and open and close the port of the central channel; the ultrasonic catheter is inserted into the central channel from the instrument channel, and the ultrasonic catheter can be moved outside the port to image the front end tissue of the sleeve assembly. The ultrasonic catheter can be inserted in and out, and the lesion site can be located in real time using ultrasonic images when performing a biopsy. It helps doctors to more accurately determine the location of the lesion, thereby improving the accuracy of sampling and reducing the occurrence of multiple sampling due to inaccurate sampling positions.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a visual biopsy forceps. Background Art

[0002] It is widely used in clinical endoscopic examinations. For example, in the process of gastroscopy, colonoscopy and other endoscopic examinations, it is usually necessary to use living tissue to remove a certain amount of diseased tissue from the patient's body by cutting, clamping or puncturing, so as to conduct pathological examination.

[0003] Its working principle is: locate the lesion area through navigation or other positioning devices, then send the instrument through the endoscope channel into the lesion area of ​​the human body, clamp an appropriate amount of living sample tissue in the lesion area of ​​the human body, and conduct subsequent pathological analysis and research.

[0004] However, currently, the clinically used ones only have a single sampling function, and before sampling, it is not possible to confirm whether the sample tissue to be clamped is the abnormal tissue at the lesion site. If the normal tissue at the lesion site is clamped during sampling, it will lead to a wrong diagnosis; or in order to obtain the abnormal tissue at the lesion site, as much sample tissue as possible needs to be clamped, which will increase the operation time and increase the pain of the patient; and after positioning and then delivering, it cannot accurately reach the lesion area.

[0005] Therefore, the prior art still needs to be improved and developed. Utility Model Content

[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a visual biopsy forceps, aiming to solve the problem of the existing single sampling function.

[0007] The technical solution of the utility model is as follows:

[0008] A visualized biopsy forceps, comprising a sleeve assembly, two forceps head assemblies, and an ultrasonic catheter; the sleeve assembly is hollow to form a central channel extending in an axial direction, and the sleeve assembly is provided with an instrument channel connected to the central channel; the two forceps head assemblies are relatively arranged at the front end of the sleeve assembly, and the two forceps head assemblies can be relatively opened and closed to clamp biopsy samples and open and close the port of the central channel; the ultrasonic catheter is inserted from the instrument channel into the central channel, and the ultrasonic catheter can be moved outside the port to image the front end tissue of the sleeve assembly.

[0009] The visualized biopsy forceps, wherein the sleeve assembly includes a sleeve and a three-way seat arranged on the outer side wall of the sleeve, the central channel is formed in the sleeve, the instrument channel is formed in the three-way seat, and the angle between the central channel and the instrument channel is an acute angle.

[0010] The visual biopsy forceps further comprises a handle assembly, wherein the handle assembly is arranged at the rear end of the sleeve assembly and connected to the forceps head assembly, and the handle assembly can reciprocate along the axial direction of the sleeve assembly to close or separate the two forceps head assemblies.

[0011] The described visualized biopsy forceps, wherein the forceps head assembly includes a forceps flap, a four-bar linkage and a pull cable connected in sequence, the sleeve is axially provided with a movable channel, one end of the pull cable is connected to the handle assembly, and the other end passes through the movable channel and is connected to the four-bar linkage; wherein the pull cable slides in the movable channel to cause the four-bar linkage to deform and drive the forceps flap to rotate.

[0012] The described visualization biopsy forceps, wherein the sleeve is a multi-layer sleeve, the multi-layer sleeve includes a flexible inner tube and an elastic outer tube, the flexible inner tube is axially hollow to form the central channel, the elastic outer tube is sleeved on the outer wall of the flexible inner tube, and the movable channel is formed between the outer wall of the flexible inner tube and the inner wall of the elastic outer tube.

[0013] In the visualized biopsy forceps, the sleeve is a single-layer sleeve, and the moving channels are arranged in the tube walls on both sides opposite to each other in the axial direction of the single-layer sleeve.

[0014] The described visualized biopsy forceps, wherein the four-bar linkage includes a first connecting member, a second connecting member, a third connecting member and a fourth connecting member, one end of the first connecting member is pivotally connected to one end of the second connecting member to form a first pivoting portion, and the first pivoting portion is connected to the end of the pull cable; one end of the third connecting member is pivotally connected to the other end of the first connecting member, one end of the fourth connecting member is pivotally connected to the other end of the second connecting member, and the other end of the third connecting member is pivotally connected to the other end of the fourth connecting member to form a second pivoting portion, and the forceps flap is fixed to the third connecting member or the fourth connecting member.

[0015] In the visualized biopsy forceps, the sleeve assembly comprises a mounting seat, the mounting seat is extended along the length direction of the pull cable, and the second pivoting portion is fixedly connected to the mounting seat.

[0016] The visualized biopsy forceps, wherein the forceps flap includes a support arm and a clamping arm connected to the end of the support arm, the support arm is connected to the third connecting piece or the fourth connecting piece, and the angle between the support arm and the clamping arm is an obtuse angle.

[0017] The described visualized biopsy forceps, wherein the handle assembly includes a fixed handle and a movable handle, the fixed handle is arranged on the end of the sleeve assembly away from the clamp head assembly, and the fixed handle is provided with a movable groove; the movable handle is slidably arranged in the movable groove, the movable handle can move axially relative to the fixed handle, the movable handle is connected to the pull cable, and the movable handle drives the pull cable to slide back and forth in the movable channel to control the opening and closing of the two clamp head assemblies.

[0018] Compared with the prior art, the embodiment of the utility model has the following advantages:

[0019] The visualized biopsy forceps disclosed in the utility model are provided with a connected instrument channel and a central channel, which realizes the insertion and exit of the ultrasonic catheter. The ultrasonic catheter can image the front environment of the sleeve assembly before entering the lesion area. By observing the ultrasonic image, it can be confirmed whether the sampling position is consistent with the lesion area, avoiding the situation of misapplying normal tissue during sampling, and improving the accuracy of diagnosis. This helps doctors to more accurately determine the location of the lesion, thereby improving the accuracy of sampling and reducing the need for multiple sampling due to inaccurate sampling positions.

[0020] Traditional biopsy operations require the ultrasonic catheter in the endoscope to be pulled out first and then inserted for sampling. However, the two clamp head components of the utility model are closed together for clamping or separated to expose the central channel. When separated, the ultrasonic catheter is directly inserted to the lesion location for direct observation. When it is confirmed that clamping is required, there is no need to pull out the ultrasonic catheter, which reduces the frequency of replacement of instruments in the channel of the endoscope, extends the service life of the endoscope, simplifies the operation process, makes the entire sampling process more efficient and convenient, and realizes linkage with the ultrasonic catheter, and accurately locates the sampling through ultrasound. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is an assembly diagram of the visual biopsy forceps head assembly in the closed state in the utility model;

[0023] Figure 2 This is an assembly diagram of the visual biopsy forceps head assembly in the utility model in an open state;

[0024] Figure 3It is a partial cross-sectional view of the clamp head assembly of the visual biopsy forceps in the utility model in a closed state;

[0025] Figure 4 It is a partial cross-sectional view of the visual biopsy forceps head assembly in the utility model in an open state;

[0026] Figure 5 for Figure 4 A partial enlarged view of the middle A;

[0027] Figure 6 It is a partial cross-sectional view of the forceps head assembly of the visual biopsy forceps in the utility model in another open state;

[0028] Figure 7 for Figure 6 A partial enlarged view of point B in the middle.

[0029] Among them, 10, sleeve assembly; 11, central channel; 12, instrument channel; 13, sleeve; 131, movable channel; 132, flexible inner tube; 133, elastic outer tube; 14, three-way seat; 15, mounting seat; 20, clamp head assembly; 21, pull cable; 22, clamp flap; 221, support arm; 222, clamping arm; 23, four-bar linkage; 231, first connecting member; 232, second connecting member; 233, first pivot part; 234, third connecting member; 235, fourth connecting member; 236, second pivot part; 30, ultrasonic catheter; 40, handle assembly; 41, movable handle; 42, fixed handle. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral 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 the present invention can be understood according to specific circumstances.

[0033] See also Figure 1 and Figure 2 In one embodiment of the utility model application, a visualized biopsy forceps is disclosed, which includes a sleeve assembly 10, two clamp head assemblies 20, and an ultrasonic catheter 30; the sleeve assembly 10 is hollow to form a central channel 11 extending in the axial direction, and the sleeve assembly 10 is provided with an instrument channel 12 connected to the central channel 11; the two clamp head assemblies 20 are relatively arranged at the front end of the sleeve assembly 10, and the two clamp head assemblies 20 can be relatively opened and closed to clamp biopsy samples and open and close the port of the central channel 11; the ultrasonic catheter 30 is inserted into the central channel 11 from the instrument channel 12, and the ultrasonic catheter 30 can be moved outside the port to image the front end tissue of the sleeve assembly 10.

[0034] The visual biopsy forceps disclosed in this embodiment are provided with a connected instrument channel 12 and a central channel 11, which enables the ultrasonic catheter 30 to penetrate in and out. The ultrasonic catheter 30 can image the front tissue of the sleeve assembly 10 before sampling. By observing the ultrasonic image, it can be confirmed whether the sampling position is consistent with the lesion area, avoiding the situation of misapplying normal tissue during sampling, and improving the accuracy of diagnosis. This helps doctors to more accurately determine the location of the lesion, thereby improving the accuracy of sampling and reducing the need for multiple sampling due to inaccurate sampling positions.

[0035] The traditional biopsy operation requires the ultrasonic catheter 30 in the endoscope to be pulled out first and then inserted for sampling. However, the two clamp head assemblies 20 of the utility model are closed together for clamping or separated to expose the central channel 11. When separated, the ultrasonic catheter 30 is directly inserted to the lesion location for direct observation. When it is confirmed that clamping is required, there is no need to pull out the ultrasonic catheter 30, which reduces the frequency of replacement of instruments in the channel of the endoscope, prolongs the service life of the endoscope, simplifies the operation process, makes the entire sampling process more efficient and convenient, and realizes linkage with the ultrasonic catheter 30, and accurately locates the sampling through ultrasound.

[0036] In actual use, the visual biopsy forceps are first passed through the forceps channel of the endoscope into the human body cavity. When entering, the forceps head assembly 20 is in a closed state, and the ultrasonic catheter 30 is extended into the central channel 11 through the instrument channel 12. When the endoscope detects a suspected lesion, the forceps head assembly 20 is opened, and the ultrasonic catheter 30 is extended out of the central channel 11 in the direction of the lesion. An ultrasonic examination is performed at the suspected lesion site. After confirmation, the forceps head assembly 20 is used to directly take samples, which is convenient for the doctor's operation and reduces the operation time.

[0037] Specifically, as another implementation of this embodiment, the sleeve assembly 10 includes a sleeve 13 and a three-way seat 14 arranged on the outer side wall of the sleeve 13, the sleeve 13 is formed with the central channel 11, the three-way seat 14 is formed with the instrument channel 12, and the angle between the central channel 11 and the instrument channel 12 is an acute angle, which facilitates the smooth insertion of the ultrasonic catheter 30. The opening of the instrument channel 12 faces one side of the handle assembly 40, which facilitates the medical staff to control the insertion depth of the ultrasonic catheter 30 while controlling the handle assembly 40, ensuring that the medical staff can work more accurately and efficiently when performing surgery or treatment.

[0038] Specifically, as another implementation of this embodiment, the visual biopsy forceps also includes a handle assembly 40, which is arranged at the rear end of the sleeve assembly 10 and is connected to the clamp head assembly 20. The handle assembly 40 can reciprocate along the axial direction of the sleeve assembly 10 to make the two clamp head assemblies 20 close or separate from each other. The user can easily adjust the relative positions of the two clamp head assemblies 20 to achieve the closing and separation of the two clamp head assemblies 20, thereby accurately clamping the biopsy sample or opening the central channel 11.

[0039] like Figure 3 and Figure 4 As shown, as another implementation of this embodiment, the pliers head assembly 20 is disclosed to include a pliers flap 22, a four-bar linkage and a cable 21 connected in sequence, the sleeve 13 is provided with a moving channel 131 along the axial direction, one end of the cable 21 is connected to the handle assembly 40, and the other end passes through the moving channel 131 and is connected to the four-bar linkage 23; wherein, the cable 21 slides in the moving channel 131 to deform the four-bar linkage 23 and drive the pliers flap 22 to rotate. The axial reciprocating motion of the cable 21 controls the closing and separation of the pliers head assembly 20, and the operation is more convenient and intuitive. Through the combined design of the cable 21 and the grasping member, accurate grasping and positioning of the diseased tissue can be achieved. The cable 21 can control the opening and closing degree of the grasping member to ensure accuracy and appropriate strength during grasping.

[0040] Specifically, the movable channel 131 disclosed in this embodiment is arranged at intervals from the central channel 11, which improves the maintenance convenience and installation convenience of the visual biopsy forceps. When installing the cable 21, the cable 21 is installed in the movable channel 131, and the movable channel 131 is spaced from the central channel 11 to ensure that the movement of the cable 21 in the movable channel 131 is not hindered, and it is also easy to maintain and replace the cable 21 in the subsequent process. To ensure that the position of the cable 21 in the movable channel 131 is stable, the movable channel 131 can also limit the movement direction of the cable 21 to prevent the cable 21 from deviating from the movement position.

[0041] Specifically, the cable 21 disclosed in this embodiment is a steel cable, which is a metal cable woven with steel wires and has excellent mechanical properties. During the use of the cable 21, it is more stable and not prone to deformation or damage, thereby ensuring the accuracy and stability of sampling by the clamp head assembly 20.

[0042] It should be noted that the cable 21 is only exemplified in this embodiment, but the protection scope of the present utility model is not limited thereto. Other types of cables 21 can achieve the technical effects disclosed in this application and, as equivalent replacements for the concept of the present utility model, should also be within the protection scope of this application.

[0043] Specifically, the four-bar linkage 23 disclosed in this embodiment is connected to the cable 21; the cable 21 slides axially in the moving channel 131, so that the four-bar linkage 23 is deformed and drives the jaw 22 to rotate, which can achieve a more precise clamping operation of the jaw 22 and ensure accurate and stable tissue grasping. Since the moving pair of the four-bar linkage 23 is a low pair, the pressure is small, the wear is small, and it can withstand a large load, thereby extending the service life of the visualization biopsy forceps.

[0044] Specifically, the four-bar linkage 23 disclosed in this embodiment is assembled from multiple bars, which makes processing and manufacturing relatively easy, can reduce production costs, and reduce the final cost of the visualization biopsy forceps.

[0045] Specifically, the four-bar linkage 23 disclosed in this embodiment can achieve a longer transmission distance, which is very important for medical equipment that requires fine operation, and allows for controlled sampling over a longer distance without sacrificing operational accuracy.

[0046] Specifically, the four-bar linkage 23 disclosed in this embodiment can achieve a larger rotation angle of the forceps flap 22 , more effectively grasp the target tissue, and avoid the ultrasonic catheter 30 passing through the central channel 11 .

[0047] Specifically, the interior of the forceps flap 22 disclosed in this embodiment has a concave curved surface structure, and the front end of the forceps flap 22 is a sharp tip, which can easily penetrate into the biopsy tissue. The end edge of the port of the concave curved surface structure of the forceps flap 22 is provided with a sharp cutting edge. The curved surface structures of the two forceps flaps 22 are arranged facing each other, ensuring that the cutting edges can cut the biopsy tissue when the two forceps flaps 22 are in a closed state, ensuring that the biopsy tissue can be easily clamped and avoiding repeated opening and closing for cutting; after cutting, it can be temporarily stored in the concave curved surface structure to avoid the falling of the tissue sample after clamping.

[0048] like Figure 4 and Figure 5 As shown, as another implementation of this embodiment, the four-bar linkage 23 includes a first connecting member 231, a second connecting member 232, a third connecting member 234, and a fourth connecting member 235; the first connecting member 231, the second connecting member 232, the third connecting member 234, and the fourth connecting member 235 are connected end to end in a diamond shape, and the use of the four-bar linkage 23 can replace a more complex mechanical system, thereby simplifying the design and reducing costs. In the case where the position or angle of the clamp flap 22 needs to be precisely controlled, the four-bar linkage 23 provides a relatively simple and effective solution.

[0049] Specifically, one end of the first connecting member 231 disclosed in this embodiment is pivoted to one end of the second connecting member 232 to form a first pivot portion 233, one end of the third connecting member 234 is pivoted to the other end of the first connecting member 231, one end of the fourth connecting member 235 is pivoted to the other end of the second connecting member 232, and the other end of the third connecting member 234 is pivoted to the other end of the fourth connecting member 235 to form a second pivot portion 236. The first pivot portion 233 is connected to the end of the cable 21, and the jaw 22 is fixed to the third connecting member 234 or the fourth connecting member 235. The cable 21 performs linear reciprocating motion, and the jaw 22 is deflected under the action of the four-bar linkage 23, thereby reducing energy loss and improving overall mechanical efficiency.

[0050] Specifically, the first pivoting portion 233 and the second pivoting portion 236 disclosed in this embodiment are both arranged in the extension direction of the length of the cable 21, which can more directly transmit the force of the cable 21, reduce energy loss, and improve the movement efficiency of the entire structure.

[0051] In actual use, when the pull cable 21 slides in the direction away from the handle assembly 40, the position of the first pivot portion 233 is close to the position of the second pivot portion 236, and the jaw 22 connected to the third connecting member 234 or the fourth connecting member 235 is deflected in the direction away from the center channel 11, that is, the two jaws 22 rotate away from each other and no longer close the center channel 11, thereby realizing the open state of the jaw head assembly 20.

[0052] When the pull cable 21 slides in the direction toward the handle assembly 40, the position of the first pivot portion 233 moves away from the position of the second pivot portion 236, and the jaw 22 connected to the third connecting member 234 or the fourth connecting member 235 is deflected in the direction toward the center channel 11, that is, the two jaws 22 rotate toward each other, thereby achieving the closed state of the jaw head assembly 20.

[0053] Specifically, the lengths of the first connecting member 231 and the second connecting member 232, the third connecting member 234 and the fourth connecting member 235 can be set according to actual needs to adapt to different human cavities. This flexibility allows the visual biopsy forceps to find a suitable design solution in different usage scenarios.

[0054] Specifically, as another implementation of this embodiment, the sleeve assembly 10 includes a mounting seat 15, and the mounting seat 15 is extended along the length direction of the cable 21. The second pivot portion 236 is fixedly connected to the mounting seat 15. The mounting seat 15 can provide additional support and fixation to ensure a stable connection between the four-bar linkage 23 and the mounting seat 15, reduce looseness and instability during movement, and improve the operational stability of the visualization biopsy forceps.

[0055] like Figure 6 and Figure 7 As shown, as another implementation of this embodiment, the clamp flap 22 includes a support arm 221 and a clamping arm 222 connected to the end of the support arm 221, the support arm 221 is connected to the third connecting member 234 or the fourth connecting member 235, the support arm 221 is arranged in the extension direction of the fourth connecting member 235, the angle between the support arm 221 and the clamping arm 222 is an obtuse angle, and the angle between the support arm 221 and the clamping arm 222 is toward one side of the central channel 11. Compared with the acute angle, the rotation angle of the clamp flap 22 can be reduced to achieve a closing effect, and the two clamping arms 222 are rotated to a certain angle and contact each other, presenting a pointed state, which is convenient for clamping the target tissue.

[0056] Specifically, as another implementation of this embodiment, the sleeve 13 is a multi-layer sleeve, which includes a flexible inner tube 132 and an elastic outer tube 133, so that the visual biopsy forceps is more flexible when bending and moving, adapting to different human cavities, and better manipulating, controlling and accurately positioning.

[0057] Specifically, the flexible inner tube 132 disclosed in this embodiment is axially hollow to form the central channel 11, and the elastic outer tube 133 is sleeved on the outer wall of the flexible inner tube 132, and the movable channel 131 is formed between the outer wall of the flexible inner tube 132 and the inner wall of the elastic outer tube 133. The separation structure of the flexible inner tube 132 and the elastic outer tube 133 makes it more convenient to replace or repair the components therein.

[0058] Specifically, as another implementation of this embodiment, the sleeve is a single-layer sleeve, and the moving channels 131 are arranged in the tube walls on both sides of the single-layer sleeve that are opposite to each other in the axial direction. By placing the moving channels 131 in the tube wall of the single-layer sleeve, it is possible to avoid adding an additional outer shell tube outside, thereby reducing the need for occupying space.

[0059] Specifically, as another implementation of this embodiment, the handle assembly 40 includes a fixed handle 42 and a movable handle 41. The fixed handle 42 is arranged on the end of the sleeve assembly 10 away from the pliers head assembly 20, and a movable groove is provided on the fixed handle 42; the movable handle 41 is slidably arranged in the movable groove, and the movable handle 41 can move axially relative to the fixed handle 42. The movable handle 41 is connected to the cable 21, and the movable handle 41 drives the cable 21 to slide back and forth in the movable channel 131 to control the opening and closing of the two pliers head assemblies 20, so that the operator can more flexibly control the movement and rotation position of the pliers head assembly 20.

[0060] Specifically, with the fixed handle 42 and the movable handle 41 disclosed in this embodiment, the operator can flexibly control the axial displacement of the movable handle 41 to accurately control the degree of opening or closing of the forceps head, thereby improving the clamping accuracy of the forceps head assembly 20 and avoiding unnecessary damage to surrounding tissues.

[0061] Specifically, the movable handle 41 disclosed in this embodiment can be slidably arranged on the movable groove, and the opening and closing operation of the distal clamp head assembly 20 is simple and effective, which is convenient. In other embodiments, a ruler and a clasp are provided on the movable groove, and the ruler can mark the movable distance of the movable handle 41 to achieve precise sampling operation, and the clasp can keep the movable handle fixed in a certain position, such as opening the clamp flap 22 and extending the small ultrasonic probe to achieve ultrasonic examination of surrounding tissues.

[0062] In summary, the present application discloses a visual biopsy forceps provided with a connected instrument channel 12 and a central channel 11, which enables the ultrasonic catheter 30 to penetrate in and out. The ultrasonic catheter 30 can image the front end environment of the cannula assembly 10 before sampling, and the sampling position can be confirmed by observing the ultrasonic image, thereby avoiding the situation of misappropriating normal tissue during sampling and improving the accuracy of diagnosis. This helps doctors to more accurately determine the location of the lesion, thereby improving the accuracy of sampling and reducing the need for multiple sampling due to inaccurate sampling positions.

[0063] The two clamp head assemblies 20 of the utility model can be closed together for clamping or separated to expose the central channel 11. In the separated state, the ultrasonic catheter 30 can be directly inserted to the lesion location for direct observation. When it is confirmed that clamping is required, there is no need to pull out the ultrasonic catheter 30, which reduces the frequency of replacement of instruments in the channel of the endoscope, extends the service life of the endoscope, simplifies the operation process, makes the entire sampling process more efficient and convenient, and realizes linkage with the ultrasonic catheter 30 to accurately locate the sampling through ultrasound.

[0064] In actual use, when the endoscope detects a suspected lesion, the visual biopsy forceps is inserted into the human body cavity through the channel of the endoscope. When entering, the forceps head assembly 20 is in a closed state, and the ultrasonic catheter 30 is extended into the central channel 11 through the instrument channel 12. The forceps head assembly 20 is opened, and the ultrasonic catheter 30 is extended out of the central channel 11 in the direction of the lesion. An ultrasonic examination is performed at the suspected lesion site. After confirmation, the forceps head assembly 20 is used to directly take samples, which is convenient for doctors to operate and reduces operation time.

[0065] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0066] It should be noted that the utility model takes the visualized biopsy forceps as an example to introduce the specific structure and working principle of the utility model, but the application of the utility model is not limited to the visualized biopsy forceps, and can also be applied to the production and use of other similar workpieces.

[0067] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A visual biopsy forceps, characterized in that: include: A sleeve assembly is hollow and has a central channel extending in the axial direction, and the sleeve assembly is provided with an instrument channel communicating with the central channel; Two forceps head assemblies are arranged opposite to each other at the front end of the sleeve assembly, and the two forceps head assemblies can be opened and closed relative to each other to clamp the biopsy sample and open and close the port of the central channel; An ultrasonic catheter is inserted from the instrument channel into the central channel and can be moved outside the port to image the front end tissue of the sheath assembly.

2. The visual biopsy forceps according to claim 1, characterized in that: The sleeve assembly includes a sleeve and a three-way seat arranged on the outer side wall of the sleeve, the central channel is formed in the sleeve, the instrument channel is formed in the three-way seat, and the angle between the central channel and the instrument channel is an acute angle.

3. The visual biopsy forceps according to claim 2, characterized in that: The visualized biopsy forceps also includes a handle assembly, which is arranged at the rear end of the sleeve assembly and connected to the forceps head assembly. The handle assembly can reciprocate along the axial direction of the sleeve assembly to close or separate the two forceps head assemblies.

4. The visual biopsy forceps according to claim 3, characterized in that: The pliers head assembly comprises a pliers disc, a four-bar linkage and a cable connected in sequence, the sleeve is provided with a moving channel along the axial direction, one end of the cable is connected to the handle assembly, and the other end passes through the moving channel and is connected to the four-bar linkage; Wherein, the cable slides in the moving channel to cause the four-bar linkage to deform and drive the clamp petal to rotate.

5. The visual biopsy forceps according to claim 4, characterized in that: The sleeve is a multi-layer sleeve, which includes a flexible inner tube and an elastic outer tube. The flexible inner tube is axially hollow to form the central channel. The elastic outer tube is sleeved on the outer wall of the flexible inner tube, and the moving channel is formed between the outer wall of the flexible inner tube and the inner wall of the elastic outer tube.

6. The visual biopsy forceps according to claim 4, characterized in that: The sleeve is a single-layer sleeve, and the moving channels are arranged in the tube walls on two sides opposite to each other in the axial direction of the single-layer sleeve.

7. The visual biopsy forceps according to claim 4, characterized in that: The four-bar linkage comprises: a first connecting member and a second connecting member, wherein one end of the first connecting member is pivotally connected to one end of the second connecting member to form a first pivoting portion, and the first pivoting portion is connected to an end of the cable; A third connecting member and a fourth connecting member, one end of the third connecting member is pivotally connected to the other end of the first connecting member, one end of the fourth connecting member is pivotally connected to the other end of the second connecting member, the other end of the third connecting member is pivotally connected to the other end of the fourth connecting member to form a second pivotal portion, and the clamp flap is fixed to the third connecting member or the fourth connecting member.

8. The visual biopsy forceps according to claim 7, characterized in that: The sleeve assembly includes a mounting seat, the mounting seat is extended along the length direction of the cable, and the second pivoting portion is fixedly connected to the mounting seat.

9. The visual biopsy forceps according to claim 7, characterized in that: The clamp flap includes a support arm and a clamping arm connected to the end of the support arm, the support arm is connected to the third connecting member or the fourth connecting member, and the angle between the support arm and the clamping arm is an obtuse angle.

10. The visual biopsy forceps according to claim 4, characterized in that: The handle assembly comprises: A fixed handle, arranged on the end of the sleeve assembly away from the clamp head assembly, and a movable groove is provided on the fixed handle; A movable handle is slidably arranged in the movable groove. The movable handle can move axially relative to the fixed handle. The movable handle is connected to the cable. The movable handle drives the cable to slide back and forth in the movable channel to control the opening and closing of the two pliers head assemblies.

Images