Disclosure of Invention
The invention aims to provide a clip applier shaft assembly and a medical operation clip applier, wherein a reset piece is arranged in a tube body to play a role in connection and reset, so that the device only has the functions of driving a main shaft to move, pushing and clamping, delivering and triggering and resetting the device.
In order to achieve the purpose, the invention provides the following technical scheme: a clip applier shaft assembly for connecting a clip applier working head, said clip applier shaft assembly having opposed head and tip ends, said clip applier shaft assembly comprising:
at least part holding in the body, and set gradually from end to head end:
the main shaft is connected with the working head of the clip applier and is driven by a driving device in the working head of the clip applier;
the pushing and clamping assembly is pushed towards the head end direction by the main shaft so as to push the surgical clip accommodated in the clip bin into the forceps clip;
the firing assembly is pushed by the main shaft towards the head end direction so as to be used for firing the surgical clip arranged in the forceps holder;
and (c) a second step of,
the clamping bin assembly comprises a clamping bin for accommodating a surgical clamp and a clamp arranged in the direction of the head end of the clamping bin;
the clip applier shaft assembly further comprises a resetting piece, and when the main shaft moves towards the head end direction, at least part of the resetting piece deforms and generates a force for restoring the resetting piece; reset the piece including connecting main shaft and the first piece that resets of push-type clamp subassembly, connecting the second of main shaft and body resets, and connect the third of percussion subassembly and body resets.
Furthermore, the tube body is internally provided with a first limiting part and a second limiting part, the first limiting part is arranged in the direction close to the tail end relative to the second limiting part, a limiting cavity is formed between the first limiting part and the second limiting part, and at least part of the firing assembly can only move in the limiting cavity.
Further, in an initial state, the main shaft is arranged close to the tail end direction relative to the first limiting part; the second reset piece is arranged on the first limiting part or the second limiting part and connected with the main shaft; when the main shaft moves towards the head end direction, the second resetting piece is compressed.
Further, in the initial state, the main shaft is arranged in the direction close to the head end relative to the first limiting part; the second reset piece is arranged on the first limiting part and connected with the main shaft; when the main shaft moves towards the head end direction, the second resetting piece is stretched.
Further, the third resetting piece is arranged on the second limiting part and connected with the firing assembly; when the firing assembly moves towards the head end direction, the third resetting piece is compressed;
or the third resetting piece is arranged on the first limiting part and is connected with the firing assembly; when the firing assembly moves towards the head end direction, the third resetting piece is stretched.
Furthermore, the pushing and clamping assembly comprises a pushing and clamping rod, and the pushing and clamping rod is used for pushing the first surgical clamp close to the head end in the clamping bin to move towards the head end.
Furthermore, the pushing and clamping assembly also comprises a clamping delivering piece arranged on the pushing and clamping rod, the clamping delivering piece comprises a clamping delivering part arranged at the head end, and in an initial state, the clamping delivering part is arranged at the rear end of the first surgical clamp close to the head end; in the process of pushing and clamping, the main shaft moves towards the direction of the head end to push the pushing and clamping rod to send the first surgical clamp into the clamp holder, and the clamping sending part of the clamping sending piece is propped against the head end of the clamping cabin to block the subsequent surgical clamps.
Further, the firing assembly comprises a firing shaft and a firing plate connected with the jaws, and the main shaft pushes the firing shaft to move towards the head end relative to the firing plate so as to close the jaws and complete firing.
Further, the firing shaft is provided with a wing part at the tail end, the wing part is arranged in the limiting cavity, and the third resetting piece is connected with the wing part.
Further, in an initial state, a preset distance is arranged between the main shaft and the firing shaft, and the length of the preset distance is greater than or equal to that of one surgical clip.
The invention also provides a medical operation clip applier which comprises a handle assembly, a working head capable of selecting the handle assembly and a clip applier shaft assembly, wherein the clip applier shaft assembly is connected with the working head.
Compared with the prior art, the invention has the beneficial effects that: according to the clip applier shaft assembly and the medical operation clip applier, the reset piece is arranged in the pipe body, when the driving device of the medical operation clip applier drives the main shaft to move towards the head end, the second reset piece deforms, the first reset piece serves as a connecting piece to further push the push-clip assembly to move, then the main shaft is in contact with the firing assembly and pushes the firing assembly to move towards the head end, and the third reset piece deforms; therefore, after the surgical clamp is finally fired and the driving is stopped, the main shaft, the clamp pushing assembly and the firing assembly are reset by the reset force generated by the reset piece. Therefore, the clamp applier shaft assembly and the medical surgical clamp applier simplify the operation process and reduce surgical risks only by arranging the driving main shaft to move and finish the functions of pushing and clamping, delivering and triggering and resetting the device.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
It should be noted that: the terms "upper", "lower", "left", "right", "inner" and "outer" of the present invention are used for describing the present invention with reference to the drawings, and are not intended to be limiting terms.
Referring to fig. 1 to 5, a clipapplier shaft assembly 100 according to an embodiment of the present invention includes atube 10, and thetube 10 has a cavity structure, and amain shaft 1, a clip pushing assembly 2, a firing assembly 3, a reset member 4, and a clip cartridge assembly 5 are accommodated therein. Wherein themain shaft 1 is driven by adriving rod 200 of a driving device in a medical surgical clip applier, and those skilled in the art should know that the driving device commonly used in the clip applier has a screw drive, a ratchet drive, etc., and in the present embodiment, the screw drive is adopted. The direction indicated by arrow A in FIG. 1 is the head end of clipapplier shaft assembly 100, and the opposite direction is the distal end. In this clip appliershaft assembly 100,main shaft 1, push away clamp subassembly 2, firing subassembly 3 and press from both sides storehouse subassembly 5 and set gradually from terminal to the head end, reset 4 including connectingmain shaft 1 and push away thefirst piece 41 that resets of clamp subassembly 2, connect thesecond piece 42 that resets ofmain shaft 1 andbody 10, and connect thethird piece 43 that resets of firing subassembly 3 andbody 10.
As will be appreciated by those skilled in the art, the clip cartridge assembly 5 is intended to receive a surgical clip, the head end of which extends into a patient to provide an access port that allows a surgeon to use a trocar to insert a number of different surgical instruments therethrough. In the device of the present invention, the cartridge assembly 5 specifically includes aclamping cartridge 51 for accommodating a surgical clip and ajaw 300 disposed at a head end of theclamping cartridge 51.
In the present device, thetube 10 is provided with a first position-limitingportion 101 and a second position-limitingportion 102 inside thereof, the first position-limitingportion 101 is disposed in a direction close to the end of the second position-limitingportion 102, a position-limitingcavity 103 is formed between the first position-limitingportion 101 and the second position-limitingportion 102, and at least a part of the firing assembly 3 can only move in the position-limitingcavity 103. In this embodiment, the first restoringmember 41, thesecond restoring member 42 and the third restoringmember 43 are all springs, and indeed, in other embodiments, other elastic structures may also be adopted. The reset element 4 can be compressed or extended to provide a spring force, in this embodiment, referring to fig. 3, in an initial state, thespindle 1 is disposed close to the end direction relative to the first position-limitingpart 101; thesecond reset piece 42 is disposed on the first position-limiting portion 101 (and may also be disposed on the second position-limitingportion 102, and is preferably disposed on the first position-limitingportion 101 from the viewpoint of saving cost and simplifying the spatial structure of the device), and is connected to thespindle 1. When thespindle 1 moves in the head end direction, the second restoringmember 42 is compressed. The third resettingpiece 43 is arranged on the second limitingpart 102 and is connected with the firing assembly 3; when the firing assembly 3 moves in the direction of the head end, thethird restoring member 43 is compressed.
Indeed, in other embodiments of the present invention, referring to fig. 6, the second restoring member 1-1 and the third restoring member 1-2 may also provide spring force by being stretched. For example: in an initial state, the main shaft 1-3 is arranged in a direction close to the head end relative to the first limiting part 1-4; the second reset piece 1-1 is arranged on the first limiting part 1-4 and is connected with the main shaft 1-3; when the main shaft 1-3 moves towards the head end direction, the second resetting piece 1-1 is stretched. The third resetting piece 1-2 is arranged on the first limiting part 1-4 and is connected with the firing assembly 1-5; when the firing assembly 1-5 moves towards the head end, the third resetting piece 1-1 is stretched.
In other embodiments, the restoring member 4 may also be combined in compression and tension.
As shown in fig. 3, in the initial state, thefirst restoring member 41, thesecond restoring member 42 and the third restoringmember 43 are preferably in a pre-compressed state. Although thefirst restoring member 41 is in the pre-compression state, the elastic force of the spring is not enough to push the pushing and clamping assembly 2 to move, so that when themain shaft 1 is driven by thescrew 200 to move towards the head end, the elastic force of the first restoringmember 41 is increased, and the pushing and clamping assembly 2 is further pushed to move towards the head end at the first time (thesecond restoring member 42 and the third restoringmember 43 are the same). Specifically, referring to fig. 4, in the clipapplier shaft assembly 100, the clip pushing assembly 2 includes aclip pushing rod 21 and aclip delivering piece 22 disposed on theclip pushing rod 21, and theclip pushing rod 21 is used for pushing the first surgical clip 50 near the head end in theclip loading bin 51 to move towards the head end. Theclip transporting piece 22 comprises aclip transporting part 221 arranged at the head end, and in an initial state, theclip transporting part 221 is provided with the rear end of the first surgical clip 50; when the surgical clip is delivered, thescrew rod 200 drives themain shaft 1 to move towards the head end direction, so as to push theclip pushing rod 21 to deliver the first surgical clip 50 to theforceps holder 300, at this time, theclip delivering piece 22 moves towards the head end direction along with theclip pushing rod 21, and when the clip is completely delivered, theclip delivering part 221 abuts against and is arranged at the head end of theclip containing bin 51, so as to block the subsequent surgical clip. Moreover, since the head end of theclip transporting piece 22 is abutted against the clampingbin 51, when thescrew 200 continues to drive themain shaft 1 to move towards the head end direction, theclamping pushing rod 21 and theclip transporting piece 22 are still.
Referring to fig. 5, after the pushing and clamping is completed, thescrew rod 200 continues to drive themain shaft 1 to move toward the head end, so as to push the triggering assembly 3 to complete triggering. Specifically, the firing assembly 3 includes a firingshaft 31 and afiring plate 32 coupled to thejaws 300. The firingshaft 31 is provided with afiring block 312 and awing 311 at the head end and the tail end, respectively, thejaw 300 is provided with an X-shaped slot (not shown), and thefiring block 312 is inserted into the X-shaped slot through a connecting pin (not shown) to be connected with thejaw 300. Thewing part 311 is limited in thelimit cavity 103, thethird reset piece 43 is connected to thewing part 311, and during the firing process, when themain shaft 1 abuts against thewing part 311 to push the firingshaft 31 to move towards the head end, thethird reset piece 43 is compressed at the moment. Preferably, in the initial state, a preset distance is provided between themain shaft 1 and thewing portion 311, and the length of the preset distance is slightly greater than (theoretically equal to) the length of one surgical clip, so as to ensure that themain shaft 1 just touches thewing portion 311 when the surgical clip is fed into theforceps holder 300. When themain shaft 1 pushes the firingshaft 31 to move in the head-end direction, since thestriking plate 32 and thejaw 300 connected thereto are fixed in the axial direction, thestriking plate 32 and thejaw 300 move in the distal direction with respect to the firingshaft 31, at which time the connecting pin on thefiring block 312 moves in the X-shaped slot to close and/or shape thejaw 300 and the surgical clip positioned or loaded therebetween.
Preferably, the X-shaped slot is sized to couple the entire length of pin movement required to move thejaw 300 from the fully open position to the fully closed position, such that the closing stroke length of thejaw 300 may be defined and controlled.
Referring now to fig. 3-5, the clip feed and firing including the clipapplier shaft assembly 100 operably connected to a clip applier working head and handle assembly is shown and described. At the initial state, theforceps 300 is in an open state, at this time, the drivingrod 200 drives themain shaft 1 to move towards the head end direction, because thefirst resetting piece 41 and thesecond resetting piece 42 are both in a pre-compression state, when the drivingrod 200 drives towards the head end, themain shaft 1 and the pushing and clamping assembly 2 move towards the head end direction at the first time, as the pushing and clamping assembly 2 advances towards the head end, the pushing and clampingrod 21 sends the first surgical clip 50 close to the head end into theforceps 300, at this time, the clampingpart 221 on theclamping piece 22 abuts against the head end of theclamping bin 51, and the second surgical clip is prevented from moving into theforceps 300. At this time, the clip feeding process is completed, themain shaft 1 contacts with theflank portion 311 of the firingshaft 31, and when the drivingrod 200 is driven continuously, themain shaft 1 pushes the firingshaft 31 to advance toward the head end direction, and the clip feeding assembly 2 stops moving due to the fact that the clip feeding portion 211 abuts against the clampingbin 51. With the advancement of the firingshaft 31, thejaws 300 complete firing (closing) under the action of thefiring block 312.
When the firing is completed, the drivingrod 200 moves reversely to the initial position, and themain shaft 1, the clip pushing device 2 and the firingshaft 31 return to the initial position under the action of the first resettingmember 41, the second resettingmember 42 and the third resettingmember 43, wherein theclip transporting plate 22 returns to the back of the first surgical clip at this time. And repeating the previous steps continuously until the surgical clips are completely fired, and finally exposing the head ends of theclip pushing rods 21 to prompt the user to replace the instruments.
Referring to fig. 7, another embodiment of the present invention further provides a medical surgical clip applier, which includes ahandle assembly 400, a workinghead 500 selectively connected to thehandle assembly 400, and a clipapplier shaft assembly 100 connected to the working head 500 (see the previous embodiment, fig. 1 to 6). It will be appreciated by those skilled in the art that clip appliers may be manipulated by providing an actuator assembly other than handleassembly 400, and thathandle assembly 400 or the actuator assembly are prior art and will not be described in detail herein. The workinghead 500 is mainly provided with a driving device, and those skilled in the art should understand that the existing clip applier generally adopts a screw driving or a ratchet driving, which are all the prior art and are not described herein.
Compared with the prior art, the invention has the beneficial effects that: according to the clip applier shaft assembly and the medical operation clip applier, the reset piece is arranged in the pipe body, when the driving device of the medical operation clip applier drives the main shaft to move towards the head end, the second reset piece deforms, the first reset piece serves as a connecting piece to further push the push-clip assembly to move, then the main shaft is in contact with the firing assembly and pushes the firing assembly to move towards the head end, and the third reset piece deforms; therefore, after the surgical clamp is finally fired and the driving is stopped, the main shaft, the clamp pushing assembly and the firing assembly are reset by the reset force generated by the reset piece. Therefore, the clamp applier shaft assembly and the medical surgical clamp applier simplify the operation process and reduce surgical risks only by arranging the driving main shaft to move and finish the functions of pushing and clamping, delivering and triggering and resetting the device.
All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.