Disclosure of Invention
The invention aims to solve the technical problem of providing an in-situ sampling biopsy needle device which can effectively improve the puncture precision so as to improve the sampling efficiency and the biopsy sampling safety so as not to easily hurt patients and medical staff.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
An in-situ sampling biopsy needle device comprises a shell, a reciprocating movement module, a trigger module, a winding mechanism and an elastic assembly, wherein the reciprocating movement module is arranged in the shell, one side, far away from a patient, of the reciprocating movement module is a proximal end, the other side is a distal end, the needle set for puncture sampling is arranged at the end, the trigger module is arranged in the shell and used for limiting the positions of corresponding parts of the reciprocating movement module in a linkage mode, the winding mechanism is arranged in the shell and used for driving the corresponding parts of the reciprocating movement module to slide relative to the shell, and the elastic assembly is arranged on the reciprocating movement module and used for driving the corresponding parts of the reciprocating movement module to rapidly move to preset positions so as to realize reciprocating movement control.
Preferably, the reciprocating movement module comprises a sliding part arranged in the shell, a reciprocating movement base with a first buckle locking groove is arranged at the far end of the sliding part, a winding base with a second buckle locking groove is arranged between the near end of the sliding part and the reciprocating movement base, the bottom of the winding base can extend downwards to the top of the winding mechanism, and the reciprocating movement module further comprises an inner needle bar base which is arranged on the winding base and can slide relative to the firing module, wherein the elastic component is arranged on the sliding part and the winding base, and the corresponding part of the needle group is arranged on the inner needle bar base.
Preferably, the sliding component comprises a first stop block and a second stop block which are arranged on the two side walls of the far end and the near end of the shell, a sliding shaft is arranged between the first stop block and the second stop block, one end of the sliding shaft penetrates through the second stop block to extend out of the outer part and is connected with an adjusting knob, a third stop block is detachably arranged on the sliding shaft, the reciprocating base is slidably arranged on the sliding shaft and is positioned between the first stop block and the third stop block, and the winding base is slidably arranged on the sliding shaft and is positioned between the second stop block and the third stop block.
Preferably, the winding base comprises a winding base sliding block which is arranged on the sliding shaft in a sliding manner and is provided with a second buckle locking groove to be matched with the second buckle in a clamping manner to realize position locking, a winding pin which downwards extends to the top of the winding mechanism is arranged at the bottom of the winding base sliding block, a positioning pin which is matched with the inner needle bar base in a connecting manner is arranged at the top of one end of the second buckle locking groove on the winding base sliding block, and a second fixing pin which is arranged on the winding base sliding block and is far away from the top of one end of the positioning pin and is used for being matched with the elastic component in a connecting manner is also included.
Preferably, the inner needle bar base comprises an inner needle bar base sliding block which is arranged above the upper chord base sliding block and matched with the positioning pin to limit the position, a first base table and a second base table which are arranged above the firing module and are in sliding contact with the top of the firing module are respectively arranged at two ends of one side of the inner needle bar base sliding block, a shaft connected with the elastic component is arranged between the first base table and the second base table, a fixed key pin II connected with the corresponding component of the needle group is arranged at the top of the inner needle bar base sliding block, a pushing sliding key is arranged on the other side wall of the inner needle bar base sliding block far away from the shaft, and the pushing sliding key extends out of the shell and can slide along the corresponding channel of the shell.
Preferably, the firing module comprises a sliding cover arranged on the inner wall of one side of the shell, the top of the sliding cover is in sliding contact with the first bottom table and the second bottom table, the inner needle bar base sliding block is matched with a limiting block arranged on the top of the sliding cover to limit positions, a firing bar matched with a preset groove of the shell to realize bidirectional reciprocating sliding adjustment is arranged below the sliding cover, the firing module further comprises a trigger pin assembly, a fixing pin assembly and a buckling assembly which are arranged on the top of the firing bar, the buckling assembly and the fixing pin assembly are connected with corresponding members of the elastic assembly, and firing buttons used for pressing and driving the firing bar to slide along the shell are arranged at the lower ends of two sides of the firing bar.
Preferably, the buckle assembly comprises a first buckle and a second buckle which are movably arranged at two ends of the top of the firing bar through the fixing pin assembly, wherein corresponding ends of the first buckle and the second buckle are connected with corresponding components of the elastic assembly and are limited in position through the triggering pin assembly, and the first buckle and the second buckle are respectively matched with the first buckle locking groove and the second buckle locking groove in a clamping way to realize position locking.
Preferably, the fixing pin assembly comprises a first fixing pin and a second fixing pin for movably mounting the corresponding ends of the first buckle and the second buckle on the corresponding end of the firing rod, a third fixing pin positioned on one side of the second buckle is arranged on one end, close to the second fixing pin, of the firing rod, and a fourth fixing pin and a fifth fixing pin which are arranged on the inner wall of the corresponding side of the shell and used for limiting elastic members of the elastic assembly connected with the corresponding ends of the first buckle and the second buckle to preset positions.
Preferably, the trigger pin assembly comprises a first trigger pin arranged on one end of the firing bar, which is close to the first fixing pin, and is positioned on one side of the first buckle, and a second trigger pin arranged on the top of one end of the firing bar, which is close to the fifth fixing pin, and used for limiting the implementation position of the second buckle.
Preferably, the winding mechanism comprises a winding body arranged on the shell and positioned below the winding base sliding block, a groove which is connected and matched with the winding pin to realize unidirectional limit control is formed in the top of one side of the winding body, and a jack hole which is sleeved and matched with a corresponding component of the elastic component is formed in the outer side wall of one end, close to the groove, of the winding body.
The elastic assembly comprises a first elastic piece, a second elastic piece, a third elastic piece and a fourth elastic piece, wherein two ends of the first elastic piece are respectively connected with the reciprocating base and the winding base sliding block, two ends of the second elastic piece are respectively connected with the winding base sliding block and the second stop block, one end of the third elastic piece is limited on the inner wall of one corresponding side of the shell through the fourth fixing pin, the other end of the third elastic piece is connected with one corresponding end of the first buckle, one end of the fourth elastic piece is limited on the inner wall of one corresponding side of the shell through the fifth fixing pin, and the other end of the fourth elastic piece is connected with one corresponding end of the second buckle.
Preferably, the elastic assembly further comprises an eighth elastic member, one end of the eighth elastic member is connected with one end of the shaft, which is close to the first base table, and the other end of the eighth elastic member is connected with the limiting block.
Preferably, the needle group comprises an outer needle tube component arranged at the top of the reciprocating base, and an inner needle rod component arranged at the top of the sliding block of the inner needle rod base, and the puncture end of the inner needle rod component is in sleeve joint fit with the outer needle tube component.
Preferably, the outer needle tube assembly comprises an outer needle tube seat arranged at the top of the reciprocating base and provided with a penetrating cavity for the penetrating end of the inner needle rod assembly to penetrate, and one end, far away from the inner needle rod assembly, of the penetrating cavity of the outer needle tube seat is provided with an outer needle tube which is used for being in sleeve joint fit with the penetrating end of the inner needle rod assembly.
Preferably, the inner needle bar assembly comprises an inner needle bar seat which is arranged at the top of the inner needle bar seat sliding block and is connected with the second fixed key pin, the position of the inner needle bar seat corresponds to that of the outer needle tube seat, and an inner needle bar with a sampling bin which can extend into the outer needle tube to perform sampling operation during working is arranged at one end, close to the outer needle tube seat, of the inner needle bar seat.
Compared with the prior art, the invention has the following beneficial effects:
In the invention, before sampling, the inner needle tube end of the needle group and the sampling bin are positioned in the cavity of the outer needle tube end, the needle group, the reciprocating movement module, the firing module, the winding mechanism and the elastic component are all positioned at preset positions in an initial state, an operator operates the winding mechanism to perform winding operation on the in-situ sampling biopsy needle device, at the moment, the reciprocating movement module, the firing module and the elastic component are all moved to preset positions in a state to be fired, and corresponding components of the elastic component stretch to generate elastic force; according to the puncture depth requirement, the operator punctures the inner needle tube end and the outer needle tube end of the needle group together to extend into a target sampling position in the patient body by the hand-held shell, so that the puncture precision can be effectively improved to improve the sampling efficiency, then the percussion module is operated to work, the round trip movement module is driven by the elastic force of the corresponding elastic member of the elastic assembly to move from the preset position in the state to be triggered to the preset position in the initial state, in the process, the outer needle tube end of the needle group is driven by the round trip movement module to move towards the near end side firstly, the corresponding member of the elastic assembly is stretched to generate elastic force, the sampling cavity of the inner needle tube end is exposed in the target sampling position at the moment, the biopsy tissue sampled by the target enters the sampling cavity of the inner needle tube end of the needle group due to elasticity, and then the round trip movement module is driven by the elastic force of the corresponding member of the elastic assembly to drive the outer needle tube end of the needle group to move towards the far end side, thereby performing a cutting operation on the biopsy tissue sampled from the target using the reciprocating movement of the outer needle tip of the needle set to leave the biopsy tissue within the sampling cavity of the inner needle tip of the needle set.
After biopsy tissue sampling is completed, the needle group is withdrawn from a patient by holding the shell, the corresponding component of the reciprocating movement module is operated to drive the inner needle tube end of the needle group to move and extend out of the outer needle tube end of the needle group so as to expose the sampling cavity of the inner needle tube end and the biopsy tissue, at the moment, the corresponding component of the elastic component is compressed to generate elastic force, medical staff can extract the biopsy tissue from the sampling cavity to realize in-situ biopsy sampling operation, then the corresponding component of the reciprocating movement module is released, the corresponding component of the reciprocating movement module and the inner needle tube end of the needle group are movably reset under the elastic force of the corresponding component of the elastic component, so that the inner needle tube end of the needle group is driven to return into the cavity of the outer needle tube end of the needle group, and further, the in-situ safe sampling of the biopsy tissue is not easy to hurt patients and medical staff.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
The first embodiment is as follows:
Referring to fig. 1 to 19, an in-situ sampling biopsy needle device comprises a housing 1, a reciprocating module 2 arranged in the housing 1, a needle set 6 arranged at one side of the reciprocating module 2 far away from a patient and at the other side of the reciprocating module 2 and at the other side of the reciprocating module, wherein the needle set 6 is used for puncture sampling, a firing module 3 arranged in the housing 1 and used for implementing linkage limiting on positions of corresponding parts of the reciprocating module 2, a winding mechanism 4 arranged in the housing 1 and used for driving the corresponding parts of the reciprocating module 2 to slide relative to the housing 1, and an elastic assembly 5 arranged on the reciprocating module 2 and used for driving the corresponding parts of the reciprocating module 2 to rapidly move to a preset position so as to realize reciprocating control. In the using process, before sampling, the inner needle tube end of the needle group 6 and the sampling bin are positioned in the cavity of the outer needle tube end, the needle group 6, the reciprocating movement module 2, the firing module 3, the winding mechanism 4 and the elastic component 5 are all positioned at preset positions in an initial state, an operator operates the winding mechanism 4 to perform winding operation on the in-situ sampling biopsy needle device, at the moment, the reciprocating movement module 2, the firing module 3 and the elastic component 5 are all moved to preset positions in a to-be-fired state, and corresponding components of the elastic component 5 stretch to generate elastic force; the operator then pierces the inner needle tube end of the needle group 6 together with the outer needle tube end into the target sampling position in the patient body by the hand-held shell 1 according to the requirement of the piercing depth, thereby being capable of effectively improving the piercing precision to improve the sampling efficiency, then operates the firing module 3 to work, and utilizes the linkage action of the firing module 3 and the reciprocating module 2 to drive the reciprocating module 2 to move from the preset position in the state to be fired to the preset position in the initial state under the elastic force of the corresponding elastic member of the elastic assembly 5, in the process, the outer needle tube end of the needle group 6 is driven by the reciprocating module 2 to move towards the near end first, the corresponding member of the elastic assembly 5 stretches to generate elastic force, at the moment, the sampling cavity of the inner needle tube end of the needle group 6 is exposed in the target sampling position, the biopsy tissue sampled by the target is introduced into the sampling cavity of the inner needle tube end of the needle group 6 due to the elasticity, then the elastic force of the corresponding member of the elastic assembly 5 drives the outer needle tube end of the needle group 6 to move towards the far end side, thereby performing a cutting operation on the biopsy tissue sampled at the target using the reciprocating movement of the outer needle tube end of the needle set 6 to leave the biopsy tissue within the sampling cavity of the inner needle tube end of the needle set 6.
After biopsy sampling is completed, the needle group 6 is withdrawn from the patient by the handheld shell 1, the corresponding component of the reciprocating movement module 2 is operated to drive the inner needle tube end of the needle group 6 to move and extend out of the outer needle tube end of the needle group 6 so as to expose the sampling cavity of the inner needle tube end and the biopsy tissue, at the moment, the corresponding component of the elastic component 5 is compressed to generate elastic force, the medical staff extracts the biopsy tissue from the sampling cavity to realize in-situ biopsy sampling operation, then the corresponding component of the reciprocating movement module 2 is released, and the corresponding component of the reciprocating movement module 2 and the inner needle tube end of the needle group 6 are movably reset under the elastic force of the corresponding component of the elastic component 5, so that the inner needle tube end of the needle group 6 is driven to return into the cavity of the outer needle tube end thereof, and further the in-situ safe sampling of the biopsy tissue is satisfied so that the patient and the medical staff are not easily injured.
The second embodiment is as follows:
referring to fig. 1 to 19, the difference between the present embodiment and the first implementation manner is that the housing 1 includes a bottom shell 11, a first side shell 121, a second side shell 122, and a third side shell 123, and the combination sequence from the distal end to the proximal end is that the first side shell 121, the bottom shell 11, the second side shell 122, and the third side shell 123, and the bottom shell 11 is provided with a first boss 111, a second boss 112, an upper chord window 113, a sliding groove 114, and a status indication window 115, which are shown that the firing module 3 is matched with the bottom shell 11. The sliding cover 30 of the firing module 3 is disposed above the first boss 111, the sliding cover 30 is directly connected with the first boss 111, the firing rod 31 is disposed above the first groove 1112 of the first boss 111, the firing rod 31 can slide in two directions in the first groove 1112, the first fixing pin 341, the second fixing pin 342, the fourth fixing pin 344 and the fifth fixing pin 345 are respectively mounted in the first fixing hole 1113, the second fixing hole 1114, the third fixing hole 1115 and the fourth fixing hole 1116, the first buckle 321 and the second buckle 322 are respectively mounted above the firing rod 31 through the first fixing pin 341 and the second fixing pin 342, the third elastic piece 53 and the fourth elastic piece 54 are respectively mounted above the first boss 111 through the first fixing pin 341 and the second fixing pin 342, one end of the third elastic piece 53 is connected with the inner wall of the bottom shell 11, the other end of the third elastic piece 53 is always in a deformed energy storage state, the first buckle 321 is enabled to rotate clockwise around the first fixing pin 341, the first trigger pin 321 rotates clockwise around the first buckle 321, and the first trigger pin 321 resets anticlockwise around the first buckle 321, and the first trigger pin rotates anticlockwise around the first buckle 321. One end of the fourth elastic piece 54 is connected with the inner wall of the bottom shell 11, the other end of the fourth elastic piece 54 is connected with the second buckle 322, the fourth elastic piece 54 is always in a deformation energy storage state, the second buckle 322 has a trend of rotating anticlockwise around the second fixed pin 342, the third fixed pin 343 plays a limiting role on anticlockwise rotation of the second buckle 322, in addition, the fourth elastic piece 54 has a function of resetting the second buckle 322 after rotating clockwise around the second fixed pin 342, the first trigger pin 331, the second trigger pin 332 and the third fixed pin 343 are arranged in the trigger rod 31, the trigger button 35 is connected with the trigger rod 31, the trigger button 35 is operated or the trigger rod 31 can be driven to slide along a groove sliding groove, and the first trigger pin 331 and the second trigger pin 332 can enable the first buckle 321 and the second buckle 322 to rotate successively under the driving action of the trigger rod 31.
In this embodiment, the reciprocating module 2 comprises a sliding member 21 disposed in the housing 1, a reciprocating base 22 with a first locking slot 222 disposed at a distal end of the sliding member 21, a winding base 23 with a second locking slot 232 disposed between a proximal end of the sliding member 21 and the reciprocating base 22, and a bottom of the winding base 23 extending downward to a top of the winding mechanism 4, and an inner needle bar base 24 disposed on the winding base 23 and capable of sliding relative to the firing module 3, wherein the elastic member 5 is disposed on the sliding member 21, On the upper chord base 23, the corresponding parts of the needle group 6 are arranged on the inner needle bar base 24. The sliding member 21 includes a first block 211 and a second block 212 disposed on the distal end and the proximal end of the housing 1, a sliding shaft 210 is disposed between the first block 211 and the second block 212, one end of the sliding shaft 210 extends through the second block 212 to be connected with an adjusting knob 214, and a third block 213 is detachably disposed on the sliding shaft 210, wherein the reciprocating base 22 is slidably disposed on the sliding shaft 210 and located between the first block 211 and the third block 213, and the winding base 23 is slidably disposed on the sliding shaft 210 and located on the second block 212, Between the third stops 213. The winding base 23 includes a winding base sliding block 231 with a second buckle locking slot 232 slidably disposed on the sliding shaft 210 and engaged with the second buckle 322 to lock the position, a winding pin 233 extending downward to the top of the winding mechanism 4 is disposed at the bottom of the winding base sliding block 231, a positioning pin 234 connected to and engaged with the inner needle bar base 24 is disposed at the top of one end of the second buckle locking slot 232 on the winding base sliding block 231, and a second fixing pin 235 is disposed at the top of one end of the winding base sliding block 231 far away from the positioning pin 234 and used for connecting and engaging with the elastic component 5. The inner needle bar base 24 comprises an inner needle bar base slide block 241 which is arranged above the upper chord base slide block 231 and is matched with the positioning pin 234 to limit the position, a first base table 2411 and a second base table 2412 which are arranged above the firing module 3 and are in sliding contact with the top of the firing module 3 are respectively arranged at two ends of one side of the inner needle bar base slide block 241, a shaft 244 which is connected with the elastic component 5 is arranged between the first base table 2411 and the second base table 2412, a fixed key pin two 243 which is connected with the corresponding component of the needle group 6 is arranged at the top of the inner needle bar base slide block 241, a pushing sliding key 242 is arranged on the other side wall of the inner needle bar base slide block 241 which is far away from the shaft 244, and the pushing sliding key 242 extends out of the outer part of the shell 1 and can slide along the corresponding channel of the shell 1. In use, the corresponding member of the resilient assembly 5 is disposed between the first base stage 2411 and the stop 301, with a return action, pushing the slide key 242 to slide on the slide slot 114 of the bottom shell 11 of the housing 1, and in addition, operating the push slide key 242 can also drive the inner needle bar base 24 to reciprocate above the slide cover 30 of the housing 1.
In this embodiment, the firing module 3 includes a sliding cover 30 disposed on an inner wall of a corresponding side of the housing 1, wherein the top of the sliding cover 30 is in sliding contact with the first base frame 2411 and the second base frame 2412, the inner needle bar base slide block 241 is defined by the first base frame 2411 and the second base frame 2412 and a limiting block 301 disposed on the top of the sliding cover 30, a firing bar 31 matched with a predetermined recess of the housing 1 to realize bidirectional reciprocating sliding adjustment is disposed below the sliding cover 30, and the firing module further includes a trigger pin assembly 33, a fixing pin assembly 34 and a fastening assembly 32 disposed on the top of the firing bar 31, wherein the fastening assembly 32 and the fixing pin assembly 34 are connected with corresponding members of the elastic assembly 5, and a firing button 35 for pressing and driving the firing bar 31 to slide along the housing 1 is disposed at two lower ends of the firing bar 31. The fastening assembly 32 includes a first fastening buckle 321 and a second fastening buckle 322 movably disposed at two ends of the top of the firing bar 31 through the fixing pin assembly 34, wherein respective ends of the first fastening buckle 321 and the second fastening buckle 322 are connected with respective members of the elastic assembly 5 and are defined by the trigger pin assembly 33, and the first fastening buckle 321 and the second fastening buckle 322 are respectively engaged with the first fastening buckle locking groove 222 and the second fastening buckle locking groove 232 in a fastening manner so as to achieve position locking. The fixing pin assembly 34 includes a first fixing pin 341 and a second fixing pin 342 for movably mounting the respective ends of the first buckle 321 and the second buckle 322 on the respective ends of the firing bar 31, a third fixing pin 343 located on one side of the second buckle 322 and a fourth fixing pin 344 and a fifth fixing pin 345 located on the inner wall of the respective side of the housing 1 for limiting the elastic member of the elastic assembly 5 connected to the respective ends of the first buckle 321 and the second buckle 322 to a predetermined position on the firing bar 31 near the end of the second fixing pin 342. The trigger pin assembly 33 includes a first trigger pin 331 disposed on the end of the firing bar 31 near the first fixing pin 341 and located at one side of the first buckle 321, and a second trigger pin 332 disposed on the top of the end of the firing bar 31 near the fifth fixing pin 345 for defining the position of the second buckle 322.
In this embodiment, the winding mechanism 4 includes a winding body 40 disposed on the housing 1 and below the winding base sliding block 231, a groove 41 connected and matched with the winding pin 233 to realize unidirectional limit control is provided at the top of one side of the winding body 40, and a jack hole 42 sleeved and matched with a corresponding member of the elastic assembly 5 is provided on an outer side wall of one end of the winding body 40, which is close to the groove 41. In the use process, the upper chord body 40 of the upper chord mechanism 4 is arranged inside the bottom shell 11 of the shell 1 and can slide freely along the distal end and the proximal end, the ejector pin hole 42 of the upper chord mechanism 4 is located on the same axis with the ejector pin 1225 of the second side shell 122 of the shell 1 and the seventh elastic element 57, one side of the seventh elastic element 57 is connected with the second side shell 122, the other side of the seventh elastic element 57 enters the ejector pin hole 42 of the upper chord mechanism 4 and is connected with the bottom surface of the ejector pin hole 42, under the connection effect of the seventh elastic element 57, the upper chord body 40 is located at one side, close to the distal end, inside the bottom shell 11 of the shell 1 and is connected with the first side shell 121, the top end groove 41 of the upper chord mechanism 4 is connected with the upper chord pin 233 of the upper chord base 23, and when the upper chord body 40 slides from the distal end to the proximal end inside the bottom shell 11 of the shell 1, the upper chord base 23 can be driven to slide proximally through the top end groove 41 with a unidirectional limiting effect on the upper chord pin 233.
In this embodiment, the elastic assembly 5 includes a first elastic member 51, a second elastic member 52, a third elastic member 53, and a fourth elastic member 54, where two ends of the first elastic member 51 are respectively connected to the reciprocating base 22 and the winding base sliding block 231, two ends of the second elastic member 52 are respectively connected to the winding base sliding block 231 and the second stop block 212, one end of the third elastic member 53 is defined on an inner wall of a corresponding side of the housing 1 by the fourth fixing pin 344, and the other end of the third elastic member 53 is connected to a corresponding end of the first buckle 321, one end of the fourth elastic member 54 is defined on an inner wall of a corresponding side of the housing 1 by the fifth fixing pin 345, and the other end of the fourth elastic member 54 is connected to a corresponding end of the second buckle 322. The spring assembly 5 further includes an eighth spring 58, one end of the eighth spring 58 being connected to an end of the shaft 244 near the first base stage 2411, the other end of the eighth spring 58 being connected to the stop 301. In use, the eighth elastic member 58 of the elastic assembly 5 is disposed between the first base stage 2411 and the stopper 301, and has a restoring effect, and the pushing slide key 242 is capable of sliding on the sliding groove 114 of the bottom case 11 of the housing 1, and in addition, the pushing slide key 242 is capable of driving the inner needle bar base 24 to reciprocate above the slide cover 30 of the housing 1.
In this embodiment, the needle set 6 includes an outer needle tube assembly 62 disposed on top of the reciprocating base 22, and an inner needle rod assembly 61 disposed on top of the inner needle rod base slider 241, and the piercing end of the inner needle rod assembly 61 is in socket engagement with the outer needle tube assembly 62. The outer needle tube assembly 62 comprises an outer needle tube seat 621 arranged at the top of the reciprocating base 22, wherein the outer needle tube seat 621 is provided with a penetrating cavity for the penetration of the puncture end of the inner needle rod assembly 61, and one end, far away from the inner needle rod assembly 61, of the penetrating cavity of the outer needle tube seat 621 is provided with an outer needle tube 622 for sleeving and matching with the puncture end of the inner needle rod assembly 61. The inner needle bar assembly 61 comprises an inner needle bar seat 611 arranged on the top of the inner needle bar base sliding block 241 and connected with the second fixed key pin 243, the position of the inner needle bar seat 611 corresponds to that of the outer needle tube seat 621, and an inner needle bar 612 with a sampling bin 6121, which can extend into the outer needle tube 622 to perform sampling operation when working, is arranged at one end of the inner needle bar seat 611, which is close to the outer needle tube seat 621.
In this embodiment, the sampling procedure for the target tissue is as follows:
The method comprises the steps of at the previous winding and the waiting period, the inner needle rod 612 of the inner needle rod assembly 61 of the needle group 6 and the sampling bin 6121 are positioned in the inner cavity of the outer needle tube 622, after the inner needle rod assembly 61 and the outer needle tube assembly 62 are wound and penetrated and extended into a target sampling position in a patient body, the triggering button 35 is operated to enable the triggering module 3 and the reciprocating module 22 to be linked, the reciprocating motion base 22 moves to the waiting position of the reciprocating motion base 22 from an initial state position, then the reciprocating motion base 22 moves to the initial state position of the reciprocating motion base 22 from the waiting position, the reciprocating motion base 22 drives the outer needle tube assembly 62 to move, the outer needle tube 622 moves to the waiting position from the initial state position to the near end side, at the moment, the sampling bin 6121 of the inner needle rod 612 is exposed outside the outer needle tube 622, the target tissue enters the sampling bin 6121 due to elastic characteristics, and the outer needle tube 622 returns to the initial state 622 from the waiting position of the outer needle tube 622 under the driving action of the reciprocating motion module 22, and the outer needle tube 622 is cut in the process of the sampling bin 6121; after the sampling is completed, the needle set 6 is withdrawn from the patient, the push slide key 242 of the inner needle bar base 24 is operated to move to the distal side along the slide groove 114 of the bottom case 11 of the housing 1, when the inner needle bar base 24 moves to the distal side, the inner needle bar 612 is also moved to the distal side by the driving of the inner needle bar base 24, the normal distance between the first base 2411 and the stopper 301 is shortened, the eighth elastic member 58 is compressed, and when the inner needle bar base 24 moves from its initial state position to its cocked position, at this time, the medical staff extracts the target tissue in the sampling chamber 6211 and releases the pushing slide key 242, the inner needle bar base 24 is reset to the initial state position of the inner needle bar 612 from the position to be fired of the inner needle bar base under the elastic action of the eighth elastic piece 58, the sampling chamber 6211 of the inner needle bar 612 returns to the inner cavity of the outer needle tube 622, and sampling is completed, if multiple sampling is needed, repeated operation is performed.
In this embodiment, the winding operation is as follows:
Before winding, the components of the reciprocating base 22, the winding base 23 and the winding mechanism 4 are positioned at the initial state positions of the components, the proximal side of the reciprocating base 22 is connected with the winding base 23, the distal side is connected with the first stop block 211, and the components are positioned at the distal side of the sliding shaft 210; at this time, the first buckle 321 in the firing module 3 is connected with the first buckle locking groove 222 of the reciprocating base 22, so that the reciprocating base 22 is in a locking state, the sliding of the reciprocating base 22 is limited, the upper chord body 40 of the upper chord mechanism 4 is pressed or pushed by the upper chord window 113 of the bottom shell 11 to slide from the initial state position of the upper chord body to the to-be-fired position of the upper chord body, the upper chord body 40 drives the upper chord base 23 to slide proximally along the sliding shaft 210 through the limiting action of the upper chord pin 233 by the top end groove 41, the to-be-fired position of the upper chord base 23 moves from the initial state position of the upper chord base 23, when the upper chord base 23 moves to the to-be-fired position of the upper chord base 23, the second buckle 322 is matched with the second buckle locking groove 232 of the upper chord base 23, then, the second buckle locking groove 232 limits the movement of the upper chord base 23, the upper chord base 23 is in the locking state, at this time, the first elastic piece 51 and the second elastic piece 52 are in the energy storage state, the upper chord body 40 is released, the upper chord body 40 is moved to the initial position of the to be-fired position of the to-be-fired needle under the elastic force of the seventh elastic piece 57, and the to-be-fired position of the to the position of the to-be-fired, and the to the biopsy needle is in the initial state.
In this embodiment, the firing control principle is described as follows:
After the winding operation is completed, the corresponding firing button 35 is pressed to drive the firing bar 31 to slide proximally along the first groove 1112 of the bottom shell 11, the first trigger pin 331 and the second trigger pin 332 are fixed in the firing bar 31, when the firing bar 31 slides, the first trigger pin 331 and the second trigger pin 332 also move along, the pressing of the firing button 35 drives the firing bar 31 to move from the initial state position of the firing bar 31 to the position to be fired of the firing bar 31 or to the preset position of the firing bar 31, when the firing bar 31 moves from the initial state position to the position to be fired, the first trigger pin 331 is linked with the first buckle 321, and when the first trigger pin 331 moves forward, the first trigger pin 331 contacts with the inclined surface of the first buckle 321, the first buckle 321 is pushed to rotate anticlockwise around the first fixed pin 341, when the firing bar 31 reaches the affiliated to-be-fired position, the first buckle 321 reaches the maximum rotation stroke, the first buckle 321 is separated from the connection relation with the first buckle locking groove 222, the locking state of the reciprocating base 22 is released, in the process, the second trigger pin 332 and the second buckle 322 do not generate any linkage, therefore, the winding base 23 is still in the locking state, the to-be-fired position fixed on the winding base 23 is kept motionless, then, the first elastic piece 51 releases elastic potential energy, the reciprocating base 22 slides at a high speed along the sliding shaft 210 towards the proximal side by driving the elastic piece first fixed pin 224, and then reaches the to-be-fired position of the reciprocating base 22 under the limit action of the third stop block 213; in the process of the firing bar 31 from the position to be fired to the preset position, the first buckle 321 is still positioned at the maximum rotation stroke position, the first trigger pin 331 mainly plays a limiting role on the first buckle 321 at the moment, the second trigger pin 332 is linked with the second buckle 322, and in the process of moving the second trigger pin 332, the second trigger pin 332 is in tangential contact with the inclined surface of the second buckle 322, and pushes the second buckle 322 to rotate clockwise around the second fixing pin 342, when the firing bar 31 reaches the third position to which the firing bar belongs from the position to be fired, the second buckle 322 reaches the maximum rotation stroke, the second buckle 322 is out of the connection with the second buckle locking groove 232, the locking state of the upper chord base 23 is released, and then the second elastic piece 52 releases elastic potential energy, so that the upper chord base 23 slides to the distal end side along the sliding shaft 210 at a high speed, the position to be fired of the upper chord base 23 moves to the initial state position of the upper chord base 23, and pushes the reciprocating base 22 to move to the distal end, and the position to be fired of the reciprocating base 22 moves to the initial state position of the reciprocating base 22. The trigger button 35 is released, the elastic actions of the third elastic piece 53 and the fourth elastic piece 54 respectively enable the first buckle 321 and the second buckle 322 to rotate and reset to the initial positions before the trigger, meanwhile, the first buckle 321 and the second buckle 322 respectively drive the first trigger pin 331 and the second trigger pin 332 to move towards the distal end side, the trigger bar 31 is reset to the initial state positions to which the trigger bar 31 belongs from the third positions to which the trigger bar belongs, and when the first buckle 321 returns to the initial positions, the trigger bar is connected with the first buckle locking groove 222 of the reciprocating base 22, so that the reciprocating base 22 is in a locking state again.
In this embodiment, the adjustment firing stroke is described as follows:
the firing stroke adjustment of the invention can be performed before winding or after the winding operation is finished or before firing:
The adjustment of the firing stroke effectively adjusts the sliding stroke of the shuttle base 22, the sliding stroke range of the shuttle base 22 being between the first stop 211 and the third stop 213, the actual length of the shuttle base 22 sliding along the sliding axis 210 during each tissue sampling procedure being equivalent to the firing stroke of the current in situ sampling biopsy, and also equivalent to the unidirectional length of the current outer needle cannula 622, the actual length of the shuttle base 22 along the sliding axis 210 being the normal distance of the proximal side planar surface 2110 of the shuttle base 22 to the first step 2131 or the second step 2132 of the third stop 213.
When the adjusting knob 214 is at the position A, the third stop block 213 is in relative position with the reciprocating base 22, the firing operation is performed, when the first buckle 321 is out of contact with the first buckle locking groove 222, the locking state of the reciprocating base 22 is released, the reciprocating base 22 slides proximally along the sliding shaft 210 at a high speed under the action of the first elastic member 51, when the proximal side plane 2110 of the reciprocating base 22 is in contact with the first step 2131 of the third stop block 213, the reciprocating base 22 stops sliding, and the maximum displacement of the reciprocating base 22 proximally along the sliding shaft 210 in the firing stroke A.
When the adjusting knob 214 is at the position B, the third stop block 213 is in relative position with the reciprocating base 22, the firing operation is performed, when the first buckle 321 is out of the connection with the first buckle locking groove 222, the locking state of the reciprocating base 22 is released, the reciprocating base 22 slides proximally along the sliding shaft 210 at a high speed under the action of the first elastic member 51, when the proximal side plane 2110 of the reciprocating base 22 is connected with the second step 2132 of the third stop block 213, the reciprocating base 22 stops sliding, and the maximum displacement of the reciprocating base 22 proximally along the sliding shaft 210 is the firing stroke B in the process.
After the winding operation is finished, the adjustment operation demonstration of the firing stroke is implemented before firing, the preset displacement adjustment is implemented on the adjusting knob 214, and the third stop block 213 rotates along with the adjustment operation demonstration, and the invention is adjusted from the firing stroke A to the firing stroke B;
The adjusting operation process of the firing stroke before winding is basically consistent with the above, only the adjusting knob 214 needs to be adjusted according to the requirement, the third stop block 213 can also rotate along with the adjusting knob, the third stop block 213 rotates from the initial state position to the to-be-fired position, and the adjusting knob 214 and the third stop block 213 cannot be linked with the reciprocating module 3 and the firing module 4 in the whole adjusting process, so that an operator can adjust the firing stroke at will in two stages before winding or after winding according to the actual requirement so as to meet the sampling requirement.
In addition to this embodiment, one or more steps may be provided on the stop 3 to vary the firing stroke by adjusting the knob 214 to have multiple firing strokes.
In this embodiment, the safe self-locking operation principle is described as follows:
Second side housing 122 includes housing element 1220, ejector pin 1225, and resilient positioning pin 1224; wherein, the housing original 1220 is provided with a sliding cavity 1221, a first through hole 1222, and a second through hole 1223; the safety lock pushing block 71 comprises a pushing rod 711, a limiting platform 712 and a blind hole 713, wherein the pushing rod passes through a second through hole 1223 of the housing original 1220 and can move in the second through hole 1223 of the housing original 1220; the safety lock switch 72 is provided with a blind hole 721, a stop block 722, a groove channel 723 and a convex groove 724, one end of the sixth elastic member 56 is connected with the surface of one side of the near end of the third side shell 123, the other end is fixed in the blind hole 713 of the safety lock push block 71, the safety lock push block 71 has a trend of moving towards the far end due to the elastic action of the sixth elastic member 56, one end of the seventh elastic member 57 is connected with the upper top surface of the sliding cavity of the shell element 1220, the other end is fixed in the blind hole 721 of the safety lock switch 72, the safety lock push block 71 has a trend of moving towards the far end due to the elastic action of the seventh elastic member 57, the limit platform 712 is connected with the surface of the sliding cavity surface 1221 at the near end side, at this time, the limit platform 712 plays a limit role on the safety lock switch 72, the near end of the push rod 31 passes through the first through hole 1222 of the shell element 1220 and can slide towards the near end through the groove channel 723 of the safety lock switch 72, the upper front firing button 35 is located at the near end, the upper end of the firing button 40 can be located at the near end of the upper end of the firing button 40, the upper end of the firing button 35 can be located at the operating mechanism 40 is located at the near end of the upper end of the firing button 40, the upper end of the firing button 40 can be moved towards the upper end of the upper chord 40, and the upper chord position of the upper chord can be located at the position of the upper end of the operating mechanism 40 is located at the position of the upper end of the safety button 40, when the upper chord body 40 and the safety lock pushing block 71 reach the to-be-fired positions of the respective members respectively, the limiting platform 712 of the safety lock pushing block 71 releases the limiting effect on the safety lock switch 72, then the safety lock switch 72 slides downwards along the surface of the sliding cavity 1221 under the elastic effect of the seventh elastic member 57, the initial state position above the safety lock switch 72 moves to the lower to-be-fired position, the lower bottom surface of the safety lock switch 72 is connected with the upper top surface of the push rod 711, at this time, the safety lock switch 72 plays a limiting role on the safety lock pushing block 71, the safety lock pushing block 71 is limited to move towards the distal end under the effect of the sixth elastic member 56, in addition, the stop 722 plays a limiting role on the firing push rod 31, the firing push rod 31 is limited to move towards the proximal end side, and the firing button 35 is in an inoperable state and is in a safe state.
After the upper chord body 40 is reset, the convex groove 724 of the safety lock switch 72 is shifted upwards, the lower bottom surface of the safety lock switch 72 is separated from the upper top surface of the push rod 71, when the lower part of the safety lock switch 72 is moved from the position to be cocked to the upper initial state position, the safety lock switch 72 releases the limiting action on the safety lock push block 71 and the cocking rod 31, the safety lock push block 71 is moved to the far end under the elastic action of the sixth elastic piece 56, when the safety lock push block 71 is reset to the initial state position to which the safety lock push block 71 belongs, the safety lock switch 72 plays a limiting action on the safety lock switch 72, at the moment, the cocking push rod 31 can slide to the near end side through the groove 723 of the safety lock switch 72, the cocking button 35 is in an operable state, the in-situ sampling biopsy needle device is in a cocked state, the safety self-locking function can be excited each time the in-locking state is completed by the in the normal-sampling biopsy needle device, the normal-position sampling biopsy needle device is in a safe state, the safety state is shifted, the safety lock switch 72 is unlocked, the cocking button 35 is in an operable state, the normal-position biopsy needle device is in a cocking state, at the normal-position sampling biopsy needle device is in a cocking state, and the cycle is repeated in this way.
In a word, the invention adopts the structure, and has the advantages of effectively improving the puncture precision so as to improve the sampling efficiency, improving the biopsy sampling safety and being not easy to hurt patients and medical staff.
It will be apparent to those skilled in the art from this disclosure that various other changes and modifications can be made which are within the scope of the invention as defined in the appended claims.