Biopsy device

Abstract

The present application is suitable for the field of medical devices, and provides a biopsy device, which comprises a shell, a suction assembly, a pushing assembly and a sensing assembly, the suction assembly comprises a needle tube which is movable in the axial direction, the needle tube is arranged in the shell and the distal end of the needle tube can be extended from the distal end of the shell, and part of the sensing assembly is connected with the pushing assembly and the needle tube, so that the sensing assembly can detect and feedback the pressure received by the needle tube during the process that the pushing assembly drives the needle tube to advance to the target tissue. The biopsy device provided by the present application can detect and feedback the resistance received by the needle tube during the process that the pushing assembly drives the needle tube to advance to the target tissue, and the operator can know the current piercing condition of the needle tube according to the feedback of the sensing assembly, so that the operation precision and safety can be improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of medical devices, and particularly relates to a biopsy device. BACKGROUND

[0002] Tissue tumors are diseases that seriously endanger human health and life. In recent years, the incidence rate has gradually increased, and the age of onset has gradually decreased. Therefore, it is of great significance to diagnose tissue tumors as early as possible. Correct diagnosis requires the combination of clinical, imaging and pathological diagnosis. Pathological diagnosis plays a key role in the selection of treatment plans. Puncture biopsy is the main way to obtain tissue samples.

[0003] Puncture biopsy of any part of the patient, such as bronchial, prostate, kidney, liver, spleen, breast and other tissues, uses a biopsy needle as the main sampling instrument during surgery. As a qualified biopsy needle, the most basic requirement is accurate positioning and safe operation, so that the operation can be successfully performed, and the safety of the patient and the medical staff during the operation is guaranteed.

[0004] The biopsy device is a commonly used puncture biopsy equipment. In the traditional biopsy device, the needle tube is inserted only by endoscopic monitoring, and it is difficult to observe whether the needle tube of the biopsy device has been inserted into the target tissue. It can only be judged by the feeling and experience of the operator, which requires a high level of operation and has a certain probability of failure. The safety is not good. SUMMARY

[0005] The purpose of the present application is to provide a biopsy device, which aims to solve the technical problems of the prior art that the biopsy device has too high requirements for the operator and poor safety.

[0006] The biopsy device comprises a shell, a suction assembly, a pushing assembly and a sensing assembly. The suction assembly comprises a needle tube that can move axially. The needle tube is arranged in the shell and can extend from the distal end of the shell. The sensing assembly is connected with the pushing assembly and the needle tube. During the process of pushing the needle tube to the target tissue by the pushing assembly, the sensing assembly can detect and feedback whether the resistance received by the needle tube exceeds a threshold value.

[0007] The biopsy device provided by the present application comprises a shell, a suction assembly, a pushing assembly and a sensing assembly. The suction assembly comprises a needle tube that can move axially. During the process of pushing the needle tube to the target tissue by the pushing assembly, the sensing assembly can detect and feedback the resistance received by the needle tube. The operator can know the current puncture condition of the needle tube according to the feedback of the sensing assembly, so as to improve the operation precision and safety. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1is a perspective view of the biopsy device provided by the first embodiment of the present application;

[0009] Figure 2 is Figure 1 an exploded view of the biopsy device;

[0010] Figure 3 is Figure 2 a perspective view of the inductor;

[0011] Figure 4 is Figure 2 a partial enlarged view of A;

[0012] Figure 5 is Figure 1 a vertical sectional view of the biopsy device;

[0013] Figure 6 is Figure 5 a partial enlarged view of B;

[0014] Figure 7 is Figure 5 a partial enlarged view of C;

[0015] Figure 8 is Figure 5 a partial enlarged view of D;

[0016] Figure 9 is a perspective view of the biopsy device provided by the second embodiment of the present application;

[0017] Figure 10 is Figure 9 an exploded view of the biopsy device;

[0018] Figure 11 is Figure 9 a vertical sectional view of the biopsy device;

[0019] Figure 12 is Figure 10 a partial enlarged view of E;

[0020] Figure 13 is a display unit setting schematic view of the third embodiment of the present application.

[0021] The reference signs in the drawings are as follows:

[0022] 100, biopsy device;

[0023] 110, shell;

[0024] 120, suction assembly; 121, needle tube; 1211, protrusion; 122, needle cover; 123, needle core; 124, fixed block;

[0025] 130, pushing assembly; 131, first rotating member; 132, pushing member; 1321, positioning groove; 1322, first glue injection port; 1323, through hole; 133, threaded structure; 1331, internal thread; 1332, external thread; 134, first connecting member;

[0026] 140, inductive assembly; 141, inductive member; 1411, fixed part; 1412, elastic part; 1413, glue injection groove; 142, display unit;

[0027] 150, bending assembly; 151, pulling member; 152, second rotating member; 153, pulling member; 1531, placing groove; 1532, second glue injection port; 1535, through hole; 154, pressing member; 1541, through hole; 1542, auxiliary groove; 155, threaded structure; 1551, internal thread; 1552, external thread;

[0028] 160, sealing structure; 161, first fixed member; 1611, through hole; 162, second fixed member; 1621, matching groove; 163, second connecting member; 164, extruding member; 165, sealing member; 166, threaded structure; 1661, internal thread; 1662, external thread. DETAILED DESCRIPTION

[0029] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the drawings. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many different ways other than those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific implementations disclosed below.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0031] In the field of interventional medical devices, the "distal end" is defined as the end of the device that is farthest from the operator during a procedure, and the "proximal end" is defined as the end of the device that is closest to the operator during a procedure. "Axial" refers to a direction parallel to the line connecting the centers of the distal and proximal ends of the medical device, and "radial" refers to a direction perpendicular to the axial direction.

[0032] As shown in FIG. 1, the medical device 100 includes a catheter tube 110, a pushing assembly 130, a first connecting member 134, a bending assembly 150, a second connecting member 163, a sealing structure 160, and a display unit 142. Figure 1 and Figure 2As shown, the biopsy device 100 provided by the first embodiment of the present application. The biopsy device 100 is used for puncturing in the human body to extract the living tissue of the human body, and is not limited to puncture and extract tissue of bronchus, liver, kidney, lymph node, etc. In this embodiment, the puncture of bronchus wall by the biopsy device 100 is taken as an example for description.

[0033] As shown in Figure 1 , Figure 2 and Figure 5 , the biopsy device 100 includes a housing 110, a suction assembly 120, a pushing assembly 130 and a sensing assembly 140. The suction assembly 120 includes a needle tube 121 which is axially movable and can be arranged in the housing 110. The distal end of the needle tube 121 can be extended from the distal end of the housing 110 to be able to penetrate into the tissue. The needle tube 121 is hollow so that the target tissue can enter the needle tube 121 into a negative pressure device (not shown in the figure) connected to the biopsy device 100. Part of the sensing assembly 140 can be connected with the pushing assembly 130 and the needle tube 121, so that in the process of the pushing assembly 130 driving the needle tube 121 to advance to the target tissue, the sensing assembly 140 can detect and feedback the resistance received by the needle tube 121.

[0034] The working principle of the biopsy device 100 is roughly as follows:

[0035] When the distal end of the needle tube 121 continuously increases the pressure against the bronchus wall but has not yet penetrated into the bronchus wall, the sensing assembly 140 detects that the resistance received by the needle tube 121 exceeds the preset threshold value. At this time, the sensing assembly 140 will feedback to the operator that the needle tube 121 has not penetrated into the bronchus wall, so that the operator can continue to advance the needle.

[0036] When the distal end of the needle tube 121 penetrates into the bronchus wall, the sensing assembly 140 detects that the resistance received by the needle tube 121 is lower than the preset threshold value. At this time, the sensing assembly 140 will feedback to the operator that the needle tube 121 has penetrated into the bronchus wall, so that the operator can stop advancing the needle.

[0037] In summary, compared with the prior art, the biopsy device 100 has at least the following beneficial effects:

[0038] In the process of the pushing assembly 130 driving the needle tube 121 to advance to the target tissue, the sensing assembly 140 can detect and feedback the resistance received by the needle tube 121, and the operator can know the current penetration condition of the needle tube 121 according to the feedback of the sensing assembly 140, so as to improve the operation precision and safety.

[0039] In this embodiment, as shown in Figure 2As shown, the suction assembly 120 further comprises a needle sleeve 122 which is arranged in the distal end of the housing 110. The distal end of the needle sleeve 122 can protrude out of the distal end of the housing 110. The distal end of the needle tube 121 is received in the needle sleeve 122 before the needle tube 121 punctures the bronchial wall. The needle tube 121 is axially movably arranged in the needle sleeve 122.

[0040] In the present embodiment, as shown in Figure 2 , the suction assembly 120 further comprises a needle core 123. The needle core 123 is axially arranged in the needle tube 121 and blocks the inner cavity of the needle tube 121. The presence of the needle core 123 can prevent other non-target tissues from entering the inner cavity of the needle tube 121 during the process of the needle tube 121 puncturing the human body and before the needle tube 121 reaches the region of the bronchial wall having the target tissue, thereby improving the success rate of biopsy. After the needle tube 121 reaches the region of the bronchial wall having the target tissue, the needle core 123 is extracted from the needle tube 121, and then the target tissue can be suctioned.

[0041] In the present embodiment, the proximal end of the needle tube 121 can be connected with a fixing block 124 (see Figure 6 ), which is used to fixedly connect the needle tube 121 with the sensing assembly 140. Moreover, the proximal end of the needle tube 121 protrudes out of the proximal end surface of the fixing block to form a protruding portion 1211. The protruding portion 1211 can be received in the hole of the sensing assembly 140. In the present embodiment, as shown in Figure 1 、 Figure 2 、 Figure 5 and Figure 6 , the advancing assembly 130 comprises a pushing member 132 and a first rotating member 131. The pushing member 132 can have a block structure, and the first rotating member 131 can have a hollow cylindrical structure. The pushing member 132 can be located in the first rotating member 131, and the pushing member 132 can be rotationally connected with the first rotating member 131. Specifically, the first rotating member 131 rotates to drive the pushing member 132 to move axially. The needle tube 121 can be connected with the pushing member 132. Specifically, in the present embodiment, the first rotating member 131 rotates relative to the pushing member 132, so that the pushing member 132 can move axially. The axial movement of the pushing member 132 can drive the needle tube 121 to move axially. The distal end of the needle tube 121 can puncture the bronchial wall by the axial movement of the pushing member 132 towards the distal end.

[0042] In the present embodiment, as shown in Figure 2 , the proximal end of the pushing member 132 can be provided with a first connecting member 134, and the proximal end of the first connecting member 134 can axially extend out of the housing 110. The first connecting member 134 has a hollow structure, and the lumen of the first connecting member 134 is in communication with the lumen of the needle tube 121. The proximal end of the first connecting member 134 is used to be connected with a negative pressure device (not shown in the figure), so that the negative pressure operation can be performed on the needle tube 121.

[0043] In the present embodiment, asFigure 2 and Figure 6 As shown, a threaded structure 133 may be provided between the pushing member 132 and the first rotating member 131. The pushing member 132 and the first rotating member 131 can be rotatably connected via the threaded structure 133. The threaded structure 133 allows the pushing member 132 to connect with the first rotating member 131, and the pushing member 132 can move axially when it rotates relative to the first rotating member 131. The threaded structure 133 includes an internal thread 1331 and an external thread 1332 adapted to the internal thread 1331. The internal thread 1331 may be provided on the inner wall of the first rotating member 131, and the external thread 1332 may be provided on the peripheral wall of the pushing member 132. Alternatively, the internal thread 1331 may be provided on the peripheral wall of the pushing member 132, and the external thread 1332 may be provided on the inner wall of the first rotating member 131. Furthermore, the first rotating member 131 can be sleeved on the housing 110, and the external thread 1332 can pass through the housing 110 radially and be screwed into the internal thread 1331.

[0044] In this embodiment, as Figure 2 , Figure 5 and Figure 6 As shown, the sensing component 140 includes a sensing element 141, which is located within the housing 110 and positioned between the proximal end of the needle tube 121 and the pusher 132. During the process of the pusher 132 propelling the needle tube 121 towards the target tissue, the sensing element 141 can detect the magnitude of the resistance experienced by the needle tube 121. Understandably, when the distal end of the needle tube 121 continuously applies progressively increasing pressure to the bronchial wall, pressing against the bronchial wall but not yet penetrating it, the reaction force (i.e., resistance) experienced by the needle tube 121 is applied to the sensing element 141 and continuously increases until it exceeds a preset threshold, meaning the sensing element 141 detects that the resistance experienced by the needle tube 121 exceeds the preset threshold. When the distal end of the needle 121 pierces the bronchial wall, the sensing component 140 detects that the resistance experienced by the needle 121 is lower than a preset threshold. The reaction force experienced by the needle 121 is applied to the sensing element 141 and continuously decreases until it is lower than the preset threshold. That is, the sensing element 141 detects that the pressure experienced by the needle 121 is lower than the preset threshold.

[0045] In this embodiment, as Figure 3 and Figure 6As shown, the sensing element 141 includes a fixed portion 1411, an elastic portion 1412, and a through hole 1415 penetrating the fixed portion 1411 and the elastic portion 1412. The fixed portion 1411 can be fixedly connected with the pushing element 132, and the contact surface between the fixed portion 1411 and the pushing element 132 can be fixed by glue injection. The elastic portion 1412 can be arranged at the distal end of the fixed portion 1411, and the elastic portion 1412 is fixedly connected with part of the edge of the fixed portion 1411. The part of the edge of the elastic portion 1412 that is not connected with the fixed portion 1411 can have a gap 1417 that is in communication with the through hole 1415, so that when the elastic portion 1412 is subjected to pressure, the elastic portion 1412 can slightly deviate in the axial direction relative to the fixed portion 1411, thereby facilitating detection of the resistance received by the needle tube 121. The proximal end of the needle tube 121 can be fixedly connected with the elastic portion 1412. The protruding portion 1211 of the needle tube 121 is accommodated in the through hole 1415, and the proximal end of the protruding portion 1211 is closer to the proximal end of the fixed portion 1411 than the gap 1417, thereby preventing blood or tissue from entering the gap 1417 during the suction process, thereby improving the sensing efficiency of the sensing element 141. When the needle tube 121 pierces the target tissue and is subjected to resistance, the elastic portion 1412 is driven to deviate in the axial direction relative to the fixed portion 1411, thereby detecting the size of the resistance received by the needle tube 121 according to the amount of deviation. In other embodiments, the fixed portion 1411 and the pushing element 132 can be connected together by screwing, clamping, or other suitable methods, and are not limited to the glue bonding in the present embodiment.

[0046] In the present embodiment, as shown in Figure 3 and Figure 6 The distal end of the pushing element 132 can be provided with a positioning groove 1321. The fixed portion 1411 can be accommodated in the positioning groove 1321 to prevent the fixed portion 1411 from deviating in the radial direction when subjected to axial pressure, thereby improving the detection accuracy of the sensing element 141. The proximal end of the fixed portion 1411 and the groove bottom of the positioning groove 1321 can be fixedly connected. Further, to prevent the adhesive from overflowing from the side of the fixed portion 1411 when the adhesive is directly injected onto the proximal end surface of the fixed portion 1411 and the groove bottom of the positioning groove 1321, so that the elastic portion 1412 is fixedly connected with the pushing element 132 and cannot elastically deform, an injection groove 1413 can be arranged on the proximal end surface of the fixed portion 1411, and the adhesive can be injected into the injection groove 1413.

[0047] The pushing element 132 can be provided with a first glue injection port 1322 arranged in the radial direction, and the first glue injection port 1322 can be in communication with the positioning groove 1321. The first glue injection port 1322 can be arranged corresponding to the matching position of the proximal end surface of the fixed portion 1411 and the groove bottom of the positioning groove 1321, so that after the proximal end surface of the fixed portion 1411 and the groove bottom of the positioning groove 1321 are in contact, the adhesive is injected from the first glue injection port 1322 into the positioning groove 1321, so that the fixed portion 1411 and the pushing element 132 are better fixedly connected.

[0048] In the embodiment, as shown in Figure 1 and Figure 2 , the sensing assembly 140 further comprises a display unit 142. The display unit 142 can be arranged outside the housing 110, in particular, on the housing 110. Moreover, the display unit 142 is electrically connected with the sensing member 141, so as to reflect whether the resistance received by the needle tube 121 detected by the sensing member 141 exceeds the threshold value.

[0049] In the embodiment, the display unit 142 can be an indicator light which can be lighted or extinguished. It can be understood that when the sensing member 141 detects that the resistance received by the needle tube 121 exceeds the preset threshold value, the indicator light is lighted. When the sensing member 141 detects that the resistance received by the needle tube 121 is lower than the preset threshold value, the indicator light is extinguished. That is, the lightening and extinguishing of the indicator light prompts the operator the puncture condition of the needle tube 121 to the bronchial wall.

[0050] In the embodiment, as shown in Figure 1 and Figure 2 , since some target tissues are located at the relatively curved position of the bronchial, it is difficult for the linear needle sleeve 122 to align with the target tissues. Based on this, the biopsy device 100 further comprises a bending assembly 150, so as to bend the distal end of the needle sleeve 122, so that the distal end of the needle sleeve 122 can align with the aforementioned target tissues. Moreover, the bending degree of the distal end of the needle sleeve 122 can be adjusted according to the specific position of the target tissues of the bronchial.

[0051] In the embodiment, as shown in Figure 2 , Figure 5 , Figure 8 , the bending assembly 150 comprises a traction member 151. The distal end of the traction member 151 can be arranged in the tube wall of the needle sleeve 122 and fixed with the distal end of the needle sleeve 122. The proximal end of the traction member 151 can be stretched out of the needle sleeve 122 from the tube wall of the needle sleeve 122 and located in the housing 110. The traction member 151 can be a nickel-titanium wire. When the proximal end of the traction member 151 is pulled, the distal end of the needle sleeve 122 can be bent. Moreover, the bending degree of the distal end of the needle sleeve 122 can be adjusted by controlling the pulling force of the traction member 151.

[0052] In the embodiment, as shown in Figure 2 , Figure 4 , Figure 5 and 8As shown, the bending assembly 150 further comprises a second rotating member 152 and a pulling member 153. The pulling member 153 can be located in the housing 110 and fixedly connected with the proximal end of the traction member 151. The second rotating member 152 can be sleeved on the housing 110 and rotationally connected with the pulling member 153. When the second rotating member 152 rotates relative to the pulling member 153, the second rotating member 152 can drive the pulling member 153 to move along the axial direction. When the pulling member 153 moves towards the proximal end of the housing 110, the traction member 151 can be pulled to bend the distal end of the needle sleeve 122. It can be understood that the closer the pulling member 153 is to the proximal end of the housing 110, the greater the pulling force of the traction member 151, the greater the pulling force of the traction member 151 on the distal end of the needle sleeve 122, and the greater the bending degree of the distal end of the needle sleeve 122.

[0053] In the embodiment, as shown in Figure 2 and 8 , a threaded structure 155 can be arranged between the second rotating member 152 and the pulling member 153. The second rotating member 152 and the pulling member 153 can be connected through the threaded structure 155. The threaded structure 155 comprises an internal thread 1551 and an external thread 1552 matched with the internal thread 1551. In the embodiment, as shown in Figure 2 , Figure 4 , Figure 5 and 8 , the bending assembly 150 further comprises a pressing member 154 radially inserted into the pulling member 153. The pulling member 153 can be provided with a placing groove 1531 on one side thereof along the axial direction, and the placing groove 1531 can be arranged along a direction perpendicular to the axial direction. The placing groove 1531 can be a cylindrical groove, and correspondingly, the pressing member 154 can be in a cylindrical shape, so that the pressing member 154 can rotate relative to the pulling member 153. The pulling member 153 is provided with a through hole 1535 for the traction member 151 to pass through, and the through hole 1535 can penetrate the proximal end face and the distal end face of the pulling member 153 along the axial direction. The pressing member 154 can be provided with a through hole 1541 for the traction member 151 to pass through, and the through hole 1541 can penetrate the side face of the pressing member 154 along the radial direction of the pressing member 154. An auxiliary groove 1542 is formed on the end of the pressing member 154 facing the outside of the housing 110, so that after the pressing member 154 is inserted into the placing groove 1531 of the pulling member 153, a screwdriver can be inserted into the auxiliary groove 1542, and the screwdriver is rotated to drive the pressing member 154 to rotate. The auxiliary groove 1542 can be a straight groove or a cross groove. It can be understood that the placing groove 1531 can also be arranged along other directions, which are not limited to the present embodiment, such as Figure 2 , in which part of the upper surface of the pulling member 153 is recessed towards the inside of the pulling member 153 to form a placing groove, as long as the placing groove is connected with the through hole of the pulling member, the traction member can pass through the through hole of the pressing member accommodated in the placing groove, and the connection between the traction member and the pulling member can be realized.

[0054] In the assembling process of the bending assembly 150, the pressing member 154 is inserted into the placing groove 1531, and the through hole 1541 on the pressing member 154 is connected with and communicated with the through hole 1535 on the pulling member 153. The proximal end of the pulling member 151 is inserted through the through hole 1541 on the pulling member 153 and the through hole 1541 on the pressing member 154, and then protrudes from the pulling member 153 towards the side part of the proximal end of the shell 110. The winding of the pulling member 151 on the pressing member 154 is achieved by rotating the pressing member 154, so that the proximal end of the pulling member 151 is fixedly connected with the pulling member 153.

[0055] In the embodiment, a similar threaded structure (not shown) can be arranged between the pressing member 154 and the pulling member 153, such as the threaded structure 155. The pressing member 154 and the pulling member 153 can be fixedly connected through the similar threaded structure. The similar threaded structure includes an internal thread and an external thread matched with the internal thread. The internal thread can be located in the placing groove 1531 and arranged on the inner wall of the pulling member 153, and the external thread can be arranged on the circumferential wall of the pressing member 154. Alternatively, the internal thread can be arranged on the circumferential wall of the pressing member 154, and the external thread can be located in the placing groove 1531 and arranged on the inner wall of the pulling member 153.

[0056] In the embodiment, as shown in Figure 8 , the gap between the pressing member 154 and the pulling member 153 can be filled with glue injection, so that the connection between the proximal end of the pulling member 151 wound on the pressing member 154 and the pushing member 132 is more firm. Further, the second glue injection port 1532 radially arranged on the pulling member 153 can be in communication with the placing groove 1531 (see Figure 4 ). After the proximal end of the pulling member 151 is wound on the pressing member 154, the adhesive is injected from the second glue injection port 1532 into the placing groove 1531, so that the proximal end of the pulling member 151, the pressing member 154 and the pulling member 153 are fixedly connected.

[0057] In the embodiment, the length of the proximal end of the pulling member 151 axially passing through the pressing member 154 is greater than or equal to one half of the circumference of the side wall of the pressing member 154, so that the proximal end of the pulling member 151 will not be pulled out of the pressing member 154 after the pressing member 154 is rotated, and can be firmly wound on the pressing member 154.

[0058] In the embodiment, as shown in Figure 4 , a sealing structure 160 can be arranged between the pushing assembly 130 and the bending assembly 150, so as to prevent the tissue cells, liquid and the like from entering the shell 110 from the proximal end of the needle sleeve 122, and effectively improve the use efficiency of the biopsy device 100.

[0059] In the embodiment, as shown in Figure 2 , Figure 4 , Figure 5 and Figure 7As shown, the sealing structure 160 comprises a first fixing member 161, a second fixing member 162, a pressing member 164 and a sealing member 165. The first fixing member 161 can be arranged at the proximal end of the needle sleeve 122. The first fixing member 161 and the second fixing member 162 are fixedly connected with the housing 110. The first fixing member 161 and the second fixing member 162 can be in block shape. A second connecting member 163 can be arranged between the first fixing member 161 and the second fixing member 162, and the two ends of the second connecting member 163 are connected with the proximal end of the first fixing member 161 and the distal end of the second fixing member 162 respectively. The second connecting member 163 can be in tubular structure arranged along the axial direction. That is, the advancing assembly 130 is arranged close to the proximal end of the housing 110, and the bending assembly 150 is arranged close to the distal end of the housing 110. The advancing assembly 130 close to the proximal end of the housing 110 can facilitate the operator to control the needle insertion. The bending assembly 150 close to the distal end of the housing 110 can shorten the distance between the bending assembly 150 and the distal end of the needle sleeve 122, and improve the bending efficiency.

[0060] The proximal end of the second fixing member 162 can be provided with a matching groove 1621, and the pressing member 164 can be rotatably inserted into the matching groove 1621, so that the pressing member 164 can move along the axial direction when the pressing member 164 rotates relative to the fixing member. The sealing member 165 can be arranged between the fixing member 162 and the pressing member 164 along the radial direction. The sealing member 165 can be in ring shape and has a certain deformation function, which can be a rubber ring. The proximal end of the traction member 151 extends out of the pipe wall of the needle sleeve 122 and passes through the first fixing member 161, and then is connected with the pressing member 154. The distal end of the needle tube 121 can pass through the pressing member 164, the sealing member 165, the second fixing member 162, the second connecting member 163 and the first fixing member 161 in sequence and then enter the needle sleeve 122. During the movement of the pressing member 164 towards the groove bottom of the matching groove 1621, the pressing member 164 can cooperate with the second fixing member 162 to extrude the sealing member 165, so that the sealing member 165 can deform radially to increase, so as to eliminate the gap between the needle tube 121 and the second fixing member 162 in the radial direction, and prevent the tissue cells, liquid and the like from entering the second connecting member 163 from the proximal end of the needle sleeve 122, and then seeping into the housing 110 from the gap between the needle tube 121 and the second fixing member 162.

[0061] In the embodiment, as shown in Figure 4 and Figure 7As shown, a threaded structure 166 may be provided between the second fixing member 162 and the pressing member 164. The second fixing member 162 and the pressing member 164 can be fixedly connected by the threaded structure 166. The threaded structure 166 includes an internal thread 1662 and an external thread 1661 adapted to the internal thread 1662. The internal thread 1662 may be located in the mating groove 1621 and provided on the inner wall of the second fixing member 162, and the external thread 1661 may be provided on the peripheral wall of the pressing member 164. Alternatively, the internal thread 1662 may be provided on the peripheral wall of the pressing member 164, and the external thread 1661 may be located in the mating groove 1621 and provided on the inner wall of the second fixing member 162.

[0062] It is understood that in other embodiments, the first rotating member 131 may be omitted. In this case, as long as the pushing member 132 can protrude from the housing 110 and move along the longitudinal central axis parallel to the housing 110, it can also achieve the function of pushing the needle tube 121. It is also understood that in other embodiments, the second rotating member 152 may be omitted. As long as the pulling member 153 can protrude from the housing 110 and move along the longitudinal central axis parallel to the housing 110, it can also achieve the function of adjusting the needle sleeve 122.

[0063] like Figures 9 to 12 As shown, the biopsy device 100 provided in this embodiment is basically the same as that in the first embodiment. Specifically, the needle tube 121 of the aspiration assembly 120 is axially movable and passes through the housing 110. The needle sheath 122 passes through the distal end of the housing 110, and the distal end of the needle sheath 122 protrudes from the distal end of the housing 110. At least a portion of the needle tube 121 is housed within the needle sheath 122, and the needle tube 121 is axially movably passed through the needle sheath 122. The needle core 123 passes axially through the needle tube 121 and fills the inner cavity of the needle tube 121. The sensor 141 is located within the housing 110 and is disposed between the proximal end of the needle tube 121 and the pusher 132. The display unit 142 is disposed outside the housing 110 and is electrically connected to the sensor 141. The pusher 132 of the propulsion assembly 130 is located inside the first rotating member 131 and is rotatably connected to the first rotating member 131. The needle tube 121 is connected to the pusher 132. The distal end of the traction member 151 of the bending assembly 150 can pass through the tube wall of the needle sleeve 122 and be fixed to the distal end of the needle sleeve 122. The proximal end of the traction member 151 can extend out of the needle sleeve 122 from inside the tube wall of the needle sleeve 122 and is located inside the housing 110.

[0064] The difference between this embodiment and the first embodiment is that in this embodiment, the propulsion component 130 is positioned near the distal end of the housing 110, and the bending component 150 is positioned near the proximal end of the housing 110. The propulsion component 130 is positioned near the distal end of the housing 110 to facilitate the operator's quick and timely detection of the status of the display unit 142 and to allow for timely appropriate actions. In this embodiment, as... Figures 10 to 12As shown, the pulling member 153 can be sleeved on the first connecting member 134 and located between the proximal end of the shell 110 and the pushing member 132. The pulling member 153 can move axially on the first connecting member 134. The proximal end of the pulling member 151 extends from the tube wall of the needle sleeve 122, passes through the through hole 1611 of the first fixing member 161, the through hole 1323 of the pushing member 132, the distal end of the through hole 1535 of the pulling member 153, enters the through hole 1541 of the compression member 154, and then passes out of the proximal end surface of the through hole 1535 of the pulling member 153, and then is connected to the compression member 154. The through holes are axially parallel to the longitudinal center axis of the biopsy device 100 and located on the same side of the longitudinal center axis of the biopsy device 100. In addition, the longitudinal center axes of the through hole 1611 of the first fixing member 161, the through hole 1323 of the pushing member 132, and the through hole 1535 of the pulling member 153 gradually increase from the longitudinal center axis of the biopsy device 100, so as to prevent the combined stress between the pulling member 151 and the first fixing member 161, the pushing member 132, and the pulling member 153 from being too large, thereby reducing the risk of fracture between the pulling member 151 and the first fixing member 161, the pushing member 132, and the pulling member 153, and improving the service life of the pulling member 151.

[0065] As shown, the pulling member 153 can be sleeved on the first connecting member 134 and located between the proximal end of the shell 110 and the pushing member 132. The pulling member 153 can move axially on the first connecting member 134. The proximal end of the pulling member 151 extends from the tube wall of the needle sleeve 122, passes through the through hole 1611 of the first fixing member 161, the through hole 1323 of the pushing member 132, the distal end of the through hole 1535 of the pulling member 153, enters the through hole 1541 of the compression member 154, and then passes out of the proximal end surface of the through hole 1535 of the pulling member 153, and then is connected to the compression member 154. The through holes are axially parallel to the longitudinal center axis of the biopsy device 100 and located on the same side of the longitudinal center axis of the biopsy device 100. In addition, the longitudinal center axes of the through hole 1611 of the first fixing member 161, the through hole 1323 of the pushing member 132, and the through hole 1535 of the pulling member 153 gradually increase from the longitudinal center axis of the biopsy device 100, so as to prevent the combined stress between the pulling member 151 and the first fixing member 161, the pushing member 132, and the pulling member 153 from being too large, thereby reducing the risk of fracture between the pulling member 151 and the first fixing member 161, the pushing member 132, and the pulling member 153, and improving the service life of the pulling member 151. Figure 13

[0066] In other embodiments, the display unit 142 can include an indicator that can display different colors. It can be understood that when the sensing member 141 detects that the resistance of the needle tube 121 exceeds the preset threshold, the indicator light will display red. When the sensing member 141 detects that the resistance of the needle tube 121 is lower than the preset threshold, the indicator light will display green.

[0067] ​Of course, when the inductor 141 detects that the resistance of the needle tube 121 exceeds the preset threshold, the indicator light can also display other colors in addition to red. When the inductor 141 detects that the resistance of the needle tube 121 is lower than the preset threshold, the indicator light can display other colors in addition to green. As long as the inductor 141 detects that the resistance of the needle tube 121 is lower than the preset threshold, the color displayed by the indicator light is different from that when the inductor 141 detects that the resistance of the needle tube 121 exceeds the preset threshold. That is, the color displayed by the indicator light is different, prompting the operator to know the puncture condition of the needle tube 121 to the bronchial wall.

[0068] The above description is merely preferred embodiments of the present application, but not intended to limit the present application. Any modification, equivalent replacement or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A biopsy device, characterized in that: The device includes a housing, a suction assembly, a propulsion assembly, a bending assembly, and a sensing assembly. The suction assembly includes a needle sheath and an axially movable needle tube. The needle tube passes through the housing and its distal end can extend from the distal end of the housing. The sensing assembly is connected to the propulsion assembly and the needle tube so that, during the process of the propulsion assembly driving the needle tube to advance towards the target tissue, the sensing assembly can detect and provide feedback on whether the resistance encountered by the needle tube exceeds a threshold. A sealing structure is provided between the propulsion assembly and the bending assembly, the sealing structure preventing tissue samples from entering the housing from the proximal end of the needle sheath; The sealing structure includes a first fixing member, a second fixing member, a second connecting member, a squeezing member, and a sealing member; the first fixing member is located at the proximal end of the needle sheath; the second connecting member is a tubular structure arranged circumferentially, which connects the first fixing member and the second fixing member; the distal end of the needle tube passes through the squeezing member, the sealing member, the second fixing member, the second connecting member, and the first fixing member in one pass.

2. The biopsy device as described in claim 1, characterized in that: The propulsion assembly includes a pusher connected to the needle and a first rotating member rotatably connected to the pusher. The first rotating member rotates relative to the pusher so that the pusher can drive the needle towards the target tissue.

3. The biopsy device as described in claim 2, characterized in that: The sensing component includes a sensor located within the housing and positioned between the proximal end of the needle tube and the pusher, to detect whether the resistance encountered by the needle tube exceeds a threshold during the process of the pusher propelling the needle tube toward the target tissue.

4. The biopsy device as described in claim 3, characterized in that: The sensing element includes a fixed part fixedly connected to the pushing member and an elastic part disposed at the distal end of the fixed part. The proximal end of the needle tube is fixedly connected to the elastic part. When the needle tube penetrates the target tissue, it encounters resistance, which causes the elastic part to move axially relative to the fixed part, so as to detect whether the resistance encountered by the needle tube exceeds a threshold.

5. The biopsy device as described in claim 4, characterized in that: The distal end of the pusher is provided with a positioning groove, the fixing part is housed in the positioning groove, and the proximal end of the fixing part is fixedly connected to the bottom of the positioning groove.

6. The biopsy device as described in claim 3, characterized in that: The sensing component also includes a display unit located outside the housing and electrically connected to the sensing element, so as to reflect whether the resistance detected by the sensing element to the needle exceeds a threshold.

7. The biopsy device as claimed in claim 1, characterized in that: The needle sheath is inserted through the distal end of the housing, and the distal end of the needle sheath protrudes from the distal end of the housing. The needle tube is axially movable through the needle sheath, and the bending assembly is used to bend the distal end of the needle sheath.

8. The biopsy device as described in claim 7, characterized in that: The bending assembly includes a traction member, the distal end of which is fixed to the distal end of the needle sleeve, so that the distal end of the needle sleeve can be bent when the traction member is pulled.

9. The biopsy device as described in claim 8, characterized in that: The bending assembly further includes a second rotating member and a pulling member. The pulling member is located inside the housing and connected to the proximal end of the pulling member. The second rotating member is sleeved on the housing and rotatably connected to the pulling member so that the pulling member can move axially to drive the pulling member to pull the distal end of the needle sleeve to bend.

10. The biopsy device as claimed in claim 9, characterized in that: The bending assembly further includes a clamping member inserted into the traction member. After the proximal end of the traction member passes through the clamping member, the clamping member can rotate relative to the traction member so that the proximal end of the traction member is pressed against the traction member.

11. The biopsy device as claimed in claim 10, characterized in that: The length by which the proximal end of the traction member passes through the clamping member is greater than or equal to half the circumference of the clamping member.

Images