Detailed Description
In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.
In the description of the present application, it should be still noted that, the proximal end refers to the end of the instrument or component that is close to the operator, the distal end refers to the end of the instrument or component that is far away from the operator, the axial direction refers to the direction parallel to the line connecting the distal end and the center of the proximal end of the instrument or component, the radial direction refers to the direction perpendicular to the axial direction, and the circumferential direction refers to the direction around the axial direction.
It should be further noted that, the related art in the background of the present application is only for convenience of describing the technical problem to be solved by the present application, and the related art does not necessarily belong to the prior art.
Referring to FIGS. 1-4, FIG. 1 shows a stapler of an embodiment of the present application with a split housing 201 hidden from view and in a needle-retracted configuration. Fig. 2 shows an enlarged structural view of fig. 1 at a. FIG. 3 shows a stapler of an embodiment of the application with one of the split shells 201 hidden and in an in-needle configuration. Fig. 4 shows an enlarged structural view of fig. 3 at B. An embodiment of the present application provides a suturing device comprising an outer cannula 10, a housing 20, a penetrating member 30, and a stroke collector, and a controller. The controller may be integrated with the stapler or may be provided on a host that is removably coupled to the stapler.
Referring to fig. 14 to 18, the distal side wall of the outer cannula 10 is provided with a window 11 for the target tissue 93 to enter, the window 11 is communicated with the internal cavity of the outer cannula 10, and the internal cavity is also used for communicating with a negative pressure source. The housing 20 is connected to the outer sleeve 10. The puncture element 30 is disposed inside the outer sheath 10 so as to be reciprocally movable in the axial direction.
In addition, a travel collector is provided within the housing 20 for collecting real-time positional information of the penetration member 30. The controller is configured to control the operating state of the negative pressure source, i.e., the negative pressure state within the internal cavity of the outer cannula 10, based on the real-time positional information of the penetrating member 30. Thus, the working state of the negative pressure source is directly and automatically adjusted according to the real-time position information of the puncture member 30, and the negative pressure source is not required to be manually operated and adjusted, so that the operation difficulty is reduced, and the sewing efficiency is improved.
The "negative pressure source" in the present application means a negative pressure device for supplying the inside of the outer tube. The negative pressure device can only comprise a vacuum pump, and the "working state for controlling the negative pressure source" refers to the "working state for controlling the vacuum pump", and the negative pressure device can also represent a vacuum system, which not only comprises the vacuum pump but also comprises a corresponding pipeline and a valve, and the "working state for controlling the negative pressure source" refers to the working state for providing the corresponding negative pressure for the inner cavity of the outer sleeve 10 by the whole vacuum system.
Wherein, the pipe diameter of the outer sleeve 10 is smaller than the inner diameter of the far end of the shell 20, so that the outer sleeve 10 has smaller external dimension and can be conveniently installed inside the shell 20. The piercing element 30 is axially movably arranged inside the outer sleeve 10. The puncture member 30 includes, but is not limited to, a puncture needle having a threading hole 31 for threading a suture 94 therethrough, so that the suture 94 can be driven to puncture a target tissue 93 to perform a suturing operation on the target tissue 93.
Specifically, in one possible implementation, the movement stroke of the penetration member 30 includes a distal stroke and a proximal stroke, and the controller controlling the operating state of the negative pressure source according to the real-time position information of the penetration member 30 includes:
The controller controls the negative pressure source to remain on when the penetrating member 30 is in the distal stroke and to remain off when the penetrating member 30 is in the proximal stroke.
That is, when the puncture member 30 is withdrawn, the puncture member 30 is first in the proximal stroke, the negative pressure source is in the closed state, when the puncture member 30 is in the distal stroke, the negative pressure source is turned on, the target tissue 93 is sucked into the outer sleeve 10 through the window 11, the puncture member 30 continues to be inserted into the target tissue 93, the suture passes through the target tissue 93 until the puncture member 30 completes the needle insertion, and then, when the puncture member 30 is in the distal stroke, the negative pressure source is turned on, and when the puncture member 30 is withdrawn into the proximal stroke, the negative pressure source is turned off again, and the sutured target tissue 93 can be withdrawn from the outer sleeve 10 through the window 11.
It should be noted that, if the negative pressure source refers to a vacuum pump, the above-mentioned "controlling the negative pressure source to be turned on" and "controlling the negative pressure source to be turned off" specifically refer to controlling the vacuum pump to be turned on and off, and if the negative pressure source refers to a valve including the vacuum pump, an internal cavity connecting the outer sleeve 10 and the vacuum pump, the "controlling the negative pressure source to be turned on" and "controlling the negative pressure source to be turned off" specifically may refer to controlling the vacuum pump to be turned on and off, and may also refer to opening and closing the valve.
For such a stapler, the "real-time positional information" of the penetrating member 30 refers to whether the penetrating member 30 is in the distal stroke position or the proximal stroke position. It should be noted that, in the present application, the "distal stroke" is located at the distal end of the "proximal stroke", and the "proximal stroke" is passed through first the "proximal stroke" and then the "distal stroke" when the puncture element 30 is advanced, and the "distal stroke" is passed through first the "proximal stroke" when the puncture element 30 is retracted, and it should be emphasized that the stroke here includes a plurality of consecutive positions, not a single position.
The suture device in this way is adjusted from the closed state to the open state in the use process, so that negative pressure generated at the window 11 can suck the target tissue 93 into the window 11, so that the puncture member 30 can correspondingly puncture the target tissue 93 sucked into the window 11 to realize one suture, and the open state of the negative pressure source can be controlled to be adjusted to the closed state, so that the target tissue 93 sucked into the window 11 can withdraw from the outside of the window 11 again to perform the next suture action.
In another possible implementation, the movement of the penetrating member 30 includes a distal stroke and the proximal stroke controller controlling the operating state of the negative pressure source based on the real-time position information of the penetrating member 30 includes controlling the negative pressure value of the negative pressure source to decrease when the penetrating member 30 enters the distal stroke from the distal stroke, and controlling the negative pressure value of the negative pressure source to increase when the penetrating member 30 enters the distal stroke from the proximal stroke. In the actual implementation process, the effect similar to closing or opening the negative pressure source can be achieved as long as the negative pressure values corresponding to the far-end travel and the near-end travel are reasonably set.
It should be noted that if the operating state of the negative pressure source is controlled by manual control, the erroneous operation of closing the negative pressure source may occur when the puncture member 30 has not withdrawn from the target tissue, and the target tissue 93 receives the external tissue and the force in the opposite direction of the puncture member 30 at the same time, so that the tissue damage may be caused.
For ease of understanding, the penetrating member 30 may be considered to be axially reciprocally disposed within the outer cannula 10 at a needle insertion limit (as shown in fig. 3 and 4 or 15 and 17) distal of the distal stroke and at a needle withdrawal limit (as shown in fig. 1 and 2 or 14, 16 and 18) proximal of the proximal stroke.
In one embodiment, the stapler further includes a first push-pull member 40. The first push-pull member 40 is connected to the puncture member 30 and is movably disposed inside the outer sleeve 10 along the axial direction Z, and the first push-pull member 40 is configured to drive the puncture member 30 to move to a needle-insertion limit position or retract to a needle-withdrawal limit position along the axial direction Z.
The travel collector has a plurality of specific structural forms, for example, a travel block 50 which moves synchronously with the puncture member 30 is provided, a travel switch 60 is provided in the housing 20, for example, an infrared distance measuring sensor, a laser distance measuring sensor and the like are provided to collect travel positions, for example, a photoelectric sensor may be provided in the housing 20, code bars which move synchronously with the puncture member 30 are provided, and real-time position information is obtained by using the code information. The "real-time position information" of the puncture element 30 acquired by a distance measuring sensor, a photoelectric sensor, or the like is specific position information of which position the puncture element 30 is located.
In this embodiment, the travel collector specifically includes a travel block 50 and a travel switch 60 that cooperate. The travel block 50 is connected to the first push-pull member 40, and the travel switch 60 is disposed on the housing 20 and connected to the controller. The travel switch 60 is disposed on the housing 20 and cooperates with the travel block 50, and the travel block 50 can drive the travel switch 60 to operate to control the working state of the negative pressure source in the process of switching between the needle-inserting limit position and the needle-withdrawing limit position of the first push-pull member 40.
In some embodiments, the travel switch 60 may be driven by the travel block 50, which is used to turn on the negative pressure source or turn off the negative pressure source, and when the negative pressure source is turned on, the window 11 can be made to inhale the target tissue 93, and when the negative pressure source is turned off, the target tissue 93 rebounds and escapes from the window 11, or may be used to adjust the negative pressure output by the negative pressure source to two negative pressure values with different magnitudes, one of which is used to inhale the target tissue 93, and the other of which is used to release the target tissue 93, or may be used to continuously adjust the negative pressure value of the negative pressure output by the negative pressure source, i.e. for example, to gradually increase the negative pressure value of the negative pressure output by the negative pressure source from the needle withdrawing limit position to the needle withdrawing limit position, so that the target tissue 93 is inhaled into the window 11, and the negative pressure value of the negative pressure output by the negative pressure source is reduced from the needle withdrawing limit position, so as to release the target tissue 93, or may be flexibly adjusted and set according to practical requirements, without limitation. In this embodiment, the travel switch 60 is specifically used to turn on or off the negative pressure source for the description.
In the use process, when the needle withdrawing limit position is moved to the needle withdrawing limit position, the first push-pull member 40 drives the puncture member 30 to move towards the distal end, the travel block 50 is synchronously driven to move, the travel block 50 correspondingly drives the travel switch 60 to act, the travel switch 60 controls the negative pressure source to be opened, so that negative pressure generated at the window 11 can suck target tissues 93 into the window 11, the first push-pull member 40 drives the puncture member 30 which moves towards the distal end to correspondingly puncture the target tissues 93 sucked into the window 11, one-time suturing is realized, when the needle withdrawing limit position is returned, the first push-pull member 40 drives the puncture member 30 to move towards the proximal end to be separated from the target tissues 93, the travel block 50 is synchronously driven to move, the travel block 50 correspondingly drives the travel switch 60 to act, the travel switch 60 controls the negative pressure source to be closed, and thus the target tissues 93 sucked into the window 11 are withdrawn outside the window 11, and the next suturing action is performed. Thus, the negative pressure suction function at the window 11 can be conveniently controlled, the stitching efficiency can be improved, and the operation difficulty can be reduced.
Referring to fig. 2 and 4, in one embodiment, the travel switch 60 is provided with a pressing member 61. The stroke block 50 is provided with a stroke groove 51 accommodating the pressing piece 61. The stroke groove 51 is provided with an abutment wall in abutment engagement with the pressing piece 61. When the travel block 50 is driven by the first push-pull member 40 and slides relative to the travel switch 60 in the axial direction, the abutting wall of the travel groove 51 abuts against the pressing member 61, and the abutting positions of the pressing member 61 and the abutting wall are different, so that different electrical signals are generated and transmitted to a host (not shown) through the electrode plate 62 of the travel switch 60 via a signal wire harness, and the host controls the negative pressure source to work in different working states.
Specifically, the abutment wall includes a first abutment portion 511 and a second abutment portion 512 that are sequentially connected in the needle insertion direction. The first abutting portion 511 and the travel switch 60 have a spacing S1, and the second abutting portion 512 and the travel switch 60 have a spacing S2,S1 and S2. The size relationship between the spacing S1 and the spacing S2 may be set according to actual requirements, and the spacing S1 may be greater than the spacing S2 or less than the spacing S2, so long as different strokes can be used to trigger corresponding signal generation.
In one embodiment, the first abutment 511 is parallel to the axial direction of the housing 20, i.e. the spacing S1 remains constant along the axial direction Z, and furthermore, the spacing S2 of the second abutment 512 from the travel switch 60 tends to increase along the needle insertion direction.
It should be noted that, the needle insertion direction refers to a direction in which the proximal end of the proximal housing 20 points to the distal end of the housing 20, as indicated by an arrow F in fig. 2, and the needle withdrawal direction is the opposite direction of the arrow F.
Specifically, when the first contact portion 511 and the pressing member 61 contact each other during the needle insertion, the pressing member 61 is pressed by the contact wall to the trigger stroke, and the negative pressure source, for example, the negative pressure suction function is started to suck the target tissue 93 so that the target tissue 93 enters the inside of the window 11, and the first contact portion 511 has a length L in the axial direction, which is set in accordance with the displacement of the first push-pull member 40 between the needle insertion limit position and the needle withdrawal limit position, so that the negative pressure source is always in the suction state of sucking the target tissue 93 into the inside of the window 11 during the penetration of the target tissue 93. As some examples, the displacement of the first push-pull member 40 between the needle-insertion limit position and the needle-withdrawal limit position is set to M, and the length L includes, but is not limited to, 0.8M to 1.2M, specifically, for example, 0.8M, 0.9M, M, 1.1M, 1.2M, or the like. Of course, the length L may be set to any value smaller than 0.8M and larger than 1.2M.
In contrast, during the needle withdrawal, when the second abutting portion 512 abuts against the pressing piece 61, the distance S between the second abutting portion 512 and the travel switch 60 tends to increase in the needle insertion direction, so that the pressing piece 61 is gradually released, and when the pressing distance of the pressing piece 61 of the travel switch 60 is shorter than the trigger travel, for example, the negative pressure suction function is turned off, and the tissue rebounds to withdraw from the window 11 of the outer sleeve 10.
In some embodiments, the abutment surface on the presser 61 that contacts the abutment wall includes, but is not limited to, being provided in an arc shape, so that the contact with the abutment wall is a line contact. The travel block 50 operates more smoothly during movement in the axial direction relative to the travel switch 60.
In some embodiments, the travel switch 60 is a mechanical push switch, which is simpler in structure and smaller in size and cost than an inductive switch. Of course, as some alternatives, the travel switch 60 may be provided as an inductive push switch.
Referring to fig. 2, 4, 12 and 13, in some embodiments, the travel switch 60 may be connected to the host computer by a signal harness or may be connected to the host computer wirelessly. In the present embodiment, the travel switch 60 is provided with two electrode plates 62 for electrically connecting with the signal wire harness, and is electrically connected with the host through the signal wire harness, so that the cost can be reduced compared with a wireless manner.
In one embodiment, the travel switch 60 is provided with a housing 63, a mounting groove 21 corresponding to the housing 63 is formed on the inner wall of the housing 20, and the housing 63 is fixed inside the mounting groove 21. In this way, the travel switch 60 is fixed to the housing 20 so as not to move in the axial direction with respect to the housing 20. Specifically, the one end surface 631 of the case 63 abuts against the bottom wall of the mounting groove 21, and the mounting stability of the travel switch 60 on the housing 20 can be improved.
In some embodiments, to facilitate processing of the housing 20, the housing 20 includes, but is not limited to, two split shells 201 that are joined to one another in a splice, and the two split shells 201 are each independently processed and then joined together in a splice. The mounting groove 21 is formed specifically at the splice site of the two split cases 201 such that the bottom surface of the outer case 63 abuts against the two split cases 201, respectively.
In some embodiments, the stroke block 50 may be mounted on the first push-pull member 40 by using various fasteners including, but not limited to, clamping, bonding, riveting, using pins, screws, bolts, etc., and specifically may be flexibly adjusted and set according to actual requirements, so long as the first push-pull member 40 is fixedly connected with the first push-pull member 40, so that the first push-pull member 40 and the stroke block 50 can move synchronously along the axial direction. In this embodiment, the stroke block 50 is mounted on the first push-pull member 40 in a clamping manner, so that the assembly efficiency can be improved.
In one embodiment, the travel block 50 is provided with a latch 52. The first push-pull member 40 is provided with a connecting seat 41, and the connecting seat 41 is provided with a clamping slot 411 in clamping fit with the clamping block 52. In this way, the stroke block 50 is not directly clamped to the first push-pull member 40, but is indirectly clamped to the first push-pull member 40.
Referring to fig. 5 to 8, in one embodiment, the inner wall of the housing 20 is formed with a sliding groove 22 extending in the axial direction. The stroke block 50 is slidably disposed in the axial direction within the slide groove 22. The side of the travel block 50 facing away from the travel switch 60 is in sliding engagement with the bottom wall of the slide groove 22 in the axial direction. In this way, in the process that the first push-pull member 40 drives the travel switch 60 to move along the axial direction, the travel switch 60 also synchronously slides in the sliding groove 22 along the axial direction, and the sliding groove 22 plays a guiding role, so that the running stability can be improved.
On the basis of the foregoing embodiment, when the first push-pull member 40 drives the puncture member 30 to move to the needle-insertion limit position, the travel switch 60 abuts against, for example, the distal end inner wall of the slide groove 22 in the axial direction, and when the first push-pull member 40 drives the puncture member 30 to move to the needle-withdrawal limit position, the travel switch 60 abuts against, for example, the proximal end inner wall of the slide groove 22 in the axial direction.
In order to more clearly show the structures of the travel block 50 and the travel switch 60 in the present embodiment, please refer to fig. 9 to 11, and fig. 9 to 11 respectively show the structure diagrams of three different views of the travel block 50. Fig. 12 and 13 are block diagrams showing two different views of the travel switch 60.
In some embodiments, the stapler further includes a suction piece 97 for connection to a negative pressure source. The suction piece 97 may be disposed outside the outer sleeve 10 or penetrating inside the outer sleeve 10, and the specific setting position and the specific structural form are flexibly adjusted and set according to the actual requirement, so long as the negative pressure generated at the suction portion can suck the target tissue 93 into the window 11, thereby performing a corresponding suturing action on the target tissue 93. When the suction member 97 is inserted into the outer cannula 10, the suction portion of the suction member 97 is disposed corresponding to the position of the window 11, for example, the distal end of the suction member 97, that is, the suction portion, extends to the side of the window 11, so that the suction member 97 can suck the target tissue 93 into the window 11 when negative pressure is generated. In contrast, when the suction member 97 is located outside the outer casing 10, for example, extends along the outer wall of the outer casing 10, the suction portion of the suction member 97 may extend into the outer casing 10 through the window 11 and is located corresponding to the position of the window 11, or may be formed with a through hole in the outer casing 10, and the suction portion communicates with the through hole to generate negative pressure at the window 11 to suck the target tissue 93, or may extend through the outer casing 10 into the outer casing 10 to generate negative pressure at the window 11 to suck the target tissue 93.
In this embodiment, in order to minimize damage to tissues caused by the suction tool 97 in various aspects such as collision and friction during the operation, the suction tool 97 is specifically deployed by being inserted into the outer sleeve 10, but not limited thereto.
In one embodiment, the suction piece 97 is disposed through the interior of the outer sleeve 10 and through the interior of the housing 20. Suction piece 97 includes, but is not limited to, a suction tube. Therefore, the whole layout is compact, the size of the device is smaller, and the damage to tissues is small.
Referring to fig. 1 and 3, in some embodiments, a connection tube 70 is provided at the proximal end of the suction tube, the connection tube 70 being, for example, a hose, the connection tube 70 being adapted to be connected to a source of negative pressure.
Referring to FIGS. 14-18, in one embodiment, the penetrating member 30 is provided with a threading aperture 31 and the stapler further includes a thread hooking member 95 movably disposed within the outer cannula 10. The hooking member 95 is used to hook or release the suture 94 passing through the target tissue along with the puncture member 30, the active positions of the hooking member 95 include a hooking limit position (as shown in fig. 16 and 18) and a loosening limit position (as shown in fig. 15 and 17), the hooking limit position of the hooking member 95 is closer to the window 11 than the loosening limit position in the radial direction of the outer sleeve 10, and the suturing device is configured to:
When the thread hooking piece 95 is at the thread hooking limit position, the negative pressure source is in a closed state;
When the thread hooking member 95 is at the thread releasing limit position, the negative pressure source is in an open state.
In this embodiment, when the puncture member 30 is withdrawn, the negative pressure source changes from the open state to the closed state during the process of withdrawing the thread from the thread-releasing limit position to the thread-releasing limit position, the target tissue 93 exits the outer sleeve 10 from the window 11, which is advantageous for avoiding that the thread-withdrawing member 95 will not interfere with the tissue during the thread withdrawing process, and after that, the puncture member 30 is inserted into the needle, the negative pressure source changes from the closed state to the open state during the process of withdrawing the thread from the thread-releasing limit position to the thread-releasing limit position, which is also advantageous for avoiding that the thread-withdrawing member 95 will interfere with the tissue during the thread releasing process, and the negative pressure source changes from the closed state to the open state, so that the target tissue 93 enters the outer sleeve 10 from the window 11 and is driven by the puncture member 30 to be sutured through for the next suture.
In one embodiment, the stapler further includes a second push-pull member 96. The second push-pull member 96 is movably disposed in the outer sleeve 10 along the axial direction Z of the outer sleeve 10 and is in transmission connection with the thread hooking member 95, and the second push-pull member 96 can drive the thread hooking member 95 to reciprocate in the axial direction Z to a thread hooking limit position and a thread releasing limit position.
In one embodiment, the wire hooking element 95 is swingably disposed at the distal end of the outer cannula 10. The second push-pull member 96 is provided with a slide groove 961, and a sliding direction X of the slide groove 961 is different from the axial direction Z. Alternatively, the sliding direction X and the axial direction Z are disposed perpendicular to each other. The thread hooking member 95 has a sliding portion 951 slidably disposed in the sliding groove 961, and the second push-pull member 96 can reciprocate along the axial direction Z of the outer sleeve 10 to drive the thread hooking member 95 to reciprocate between a thread hooking limit position and a thread releasing limit position. In this way, when the second push-pull member 96 reciprocates along the axial direction Z of the outer sleeve 10, the sliding portion 951 moves along the sliding groove 961 correspondingly, so as to drive the thread hooking member 95 to reciprocate between the thread hooking limit position and the thread loosening limit position. And further, the whole structure is compact, and the occupied space is small.
In some embodiments, the second push-pull member 96 is driven by the first push-pull member 40, so that the thread hooking member 95 is driven by the puncture member 30, and thus the puncture member 30 can synchronously withdraw or insert the needle when the thread hooking member 95 performs the thread hooking or releasing operation, so that when the suture is performed, only the axial sliding power for the movement of the first push-pull member 40 is provided, both the thread hooking member 95 and the puncture member 30 can move along with the movement, which is beneficial to simplifying the suture operation. Of course, in some alternatives, the first push-pull member 40 can also be driven by the second push-pull member 96 to cause the piercing member 30 to be driven by the wire hooking member 95.
In some embodiments, to improve the operation stability of the first push-pull member 40, the side wall of the first push-pull member 40 facing the outer sleeve 10 is adapted to the shape of the inner wall of the outer sleeve 10, and the side wall of the first push-pull member 40 facing the suction pipe member is adapted to the shape of the outer wall of the suction pipe member, so that stable operation of the first push-pull member 40 in the axial direction Z can be achieved. Likewise, the side wall of the second push-pull member 96 facing the outer sleeve 10 conforms to the shape of the inner wall of the outer sleeve 10, and the side wall of the second push-pull member 96 facing the suction tube conforms to the shape of the outer wall of the suction tube.
Referring to fig. 14 to 18, specifically, the stitching operation for the sampling channel includes the following steps:
Step S110, the stitching instrument stretches into a preset position in the sampling channel, at the moment, the puncture member 30 is positioned at the needle withdrawing limit position, and the thread hooking member 95 is positioned at the thread hooking limit position, as shown in FIG. 14;
Step S120, the negative pressure source generates negative pressure to adsorb the target tissue 93 on one side wall of the sampling channel, the adsorbed target tissue 93 protrudes out of the inner wall of the sampling channel, the puncture member 30 is driven to act so as to enable the suture 94 to pass through the target tissue 93, and meanwhile, the thread hooking member 95 is enabled to move from the thread hooking limit position to the thread loosening limit position, so that interference between the thread hooking member 95 and the puncture member 30 is avoided, as shown in FIG. 15;
Step S130, the puncture member 30 is retracted, and the thread hooking member 95 is moved from the thread loosening limit position to the thread hooking limit position, so that the suture thread 94 penetrating through the target tissue 93 can be smoothly hooked in the process of moving to the thread hooking limit position, as shown in FIG. 16;
Step S140, the stapler can integrally rotate a certain angle to make the window 11 face other positions of the sampling channel, and maintain the position unchanged, when the stapler needs to rotate to other positions, the negative pressure source is firstly enabled to release negative pressure to avoid interference with the target tissue 93 in the rotating process, and the stapler is specifically used for expanding and introducing by taking the stapler as an example of rotating to 180 degrees, the negative pressure source adsorbs the target tissue 93 on the other opposite side wall of the sampling channel, the adsorbed target tissue 93 protrudes out of the inner wall of the sampling channel so as to drive the puncture member 30 to act to enable the suture thread 94 to pass through the target tissue 93, and simultaneously enable the thread hooking member 95 to move from the thread hooking limit position to the thread loosening limit position to avoid interference between the thread hooking member 95 and the puncture member 30, as shown in fig. 17;
Step S150, the puncture member 30 is withdrawn, and the thread hooking member 95 is moved from the thread loosening limit position to the thread hooking limit position, so that the suture thread 94 on the puncture member 30 passing through the target tissue 93 can be smoothly hooked in the process of moving to the thread hooking limit position, and the suture thread 94 hooked by the thread hooking member 95 passes through the suture thread 94 passing through the target tissue 93 as shown in step S130, and the embodiment is shown in fig. 18.
In some embodiments, in particular, during the process that the first push-pull member 40 drives the puncture member 30 to withdraw the needle, the second push-pull member 96 also synchronously drives the thread hooking member 95 to hook the suture thread 94 passing through the target tissue 93, preventing the suture thread 94 from withdrawing from the target tissue 93 along with the puncture member 30, in addition, during the process that the first push-pull member 40 drives the puncture member 30 to puncture the target tissue 93 again, the second push-pull member 96 also synchronously drives the thread hooking member 95 to act so as to release the suture thread 94 hooked last time, so that the thread hooking member 95 cannot interfere with the puncture member 30 in the needle insertion state, the puncture member 30 can drive the suture thread 94 to smoothly complete the puncture operation and enter the last threading coil, and when the puncture member 30 drives the suture thread 94 to withdraw from the target tissue 93 again, the second push-pull member 96 also synchronously drives the thread hooking member 95 to hook the suture thread 94 passing through the target tissue 93 again, preventing the suture thread 94 from withdrawing from the target tissue 93 along with the puncture member 30. Thus, the suture work of the target tissue 93 can be conveniently completed with the cooperation of the thread hooking member 95. In addition, the first push-pull member 40 and the second push-pull member 96 are movably arranged inside the outer sleeve 10 in a penetrating manner, so that the first push-pull member 40 and the second push-pull member 96 enter the sampling channel along with the outer sleeve 10, and negative pressure is generated by a negative pressure source communicated with the inner cavity of the outer sleeve 10 to suck the target tissue 93 into the outer sleeve 10, so that the suturing operation of the target tissue 93 can be realized, the first push-pull member 40 and the second push-pull member 96 can not be directly contacted with the inner wall of the sampling channel, and collision friction damage to the inner wall tissue of the sampling channel can be reduced.
On the basis of the foregoing embodiment, a signal wire groove is formed on the inner wall of the housing 20, which extends up to the pipe outlet 23 for guiding the signal wire harness (not shown) welded to the travel switch 60. Further, a pipe-line outlet 23 is provided on the proximal inner wall of the housing 20 for leading out the suction member 97 and the signal harness when assembled.
In one embodiment, the stapler further includes a grip 80 and a linkage 91. The grip 80 is located outside the housing 20, and one end of the grip 80 is rotatably connected to the housing 20. One end of the connecting rod 91 is rotatably connected with the grip 80, the housing 20 is formed with a movable groove 24, the connecting rod 91 is movably inserted into the movable groove 24, and the other end of the connecting rod 91 is rotatably connected with the first push-pull member 40. When the handle 80 is pressed to move the other end of the handle 80 in a direction approaching the housing 20, the handle 80 drives the link 91 to move, and the link 91 drives the first push-pull member 40 to move toward the distal end of the outer sleeve 10.
In use, by pressing the grip 80 to move the other end of the grip 80 in a direction approaching the housing 20, the grip 80 drives the link 91 to move, and the link 91 drives the first push-pull member 40 to move toward the distal end of the outer cannula 10, thereby enabling the needle insertion operation of the puncture member 30 in the axial direction. Therefore, the axial movement of the first push-pull member 40 can be driven without using a power mechanism such as an air cylinder or a motor screw rod arranged in the housing 20, and the structure can be simplified, the cost can be reduced, and the size of the housing 20 is smaller by using the grip handle 80 and the connecting rod 91 as the power mechanism for driving the first push-pull member 40 to move axially.
Referring to FIGS. 1-4, in one embodiment, the stapler further includes a reset element 92. The reset element 92 is connected to the first push-pull element 40 and the housing 20, respectively, and the reset element 92 is configured to reset the first push-pull element 40 from the needle-insertion limit position to the needle-withdrawal limit position. Specifically, the restoring member 92 includes, but is not limited to, an elastic restoring member 92, specifically, for example, a spring, an elastic strip, an elastic cord, or the like, as long as the restoring of the first push-pull member 40 from the needle-insertion limit position to the needle-withdrawal limit position can be achieved. In this way, on the one hand, the holding handle 80 is pressed to a closed state, the holding handle 80 enables the first push-pull member 40 to move from the needle withdrawing limit position to the needle inserting limit position through the connecting rod 91, and the restoring member 92 can be deformed to store elastic potential energy simultaneously, on the other hand, after the holding handle 80 is released, under the action of the restoring force of the restoring member 92, the first push-pull member 40 can be restored from the needle inserting limit position to the needle withdrawing limit position, and meanwhile, the holding handle 80 is restored to an open state, namely, the state shown in fig. 4 is moved to the state shown in fig. 2.
In some embodiments, the movable slot 24 is disposed to extend in an axial direction, thereby providing a movable space in the axial direction for movement of the link 91. Specifically, the movable groove 24 may be slidably engaged with the link 91 to guide the rotation of the link 91, so that the link 91 is prevented from being biased toward any side when being forced during the pressing of the grip 80, and the pressing operation is more stable and reliable. In addition, the distal end of the grip 80 is rotatably connected to the housing 20, the proximal end of the grip 80 is rotatably connected to the proximal end of the link 91, the grip 80 is disposed at an acute angle to the link 91, and the distal end of the link 91 is rotatably connected to the first push-pull member 40 and disposed at an included angle. When the handle 80 is pressed, the handle 80 drives the proximal end of the connecting rod 91 to act, so that the distal end of the connecting rod 91 drives the first push-pull member 40 to move towards the distal end of the outer sleeve 10 along the axial direction, thereby driving the puncture member 30 to perform a needle insertion operation, whereas when the handle 80 is released, the puncture member 30, the first push-pull member 40 and the handle 80 are reset under the reset force of the reset member 92.
In some embodiments, the number of grips 80 is at least one, including but not limited to one, two, three, four or more, and may be specifically flexibly adjusted and set according to the practice. When the number of the grip handles 80 is plural, all the grip handles 80 are arranged at equal intervals around the circumferential direction of the housing 20, and the links 91 are provided correspondingly plural and are provided in one-to-one correspondence with the grip handles 80, respectively. In this way, during the holding process, all parts of the first push-pull member 40 are stressed synchronously, the stress is balanced, and the movement along the axial direction is more stable and reliable.
In one embodiment, the two handles 80 and the connecting rod 91 are respectively arranged on two opposite sides of the housing 20 in a one-to-one correspondence manner. In this way, on the one hand, the number of the holding handles 80 is proper, so that the holding operation can be facilitated, and on the other hand, during the holding process, all parts of the first push-pull member 40 are stressed synchronously, the stress is balanced, and the movement along the axial direction is more stable and reliable.
In one embodiment, each grip 80 is formed with a receiving slot that receives the housing 20. When the two handles 80 are pressed to move the handles 80 to the closed position, the handles 80 are abutted against each other, and the opposite sides of the housing 20 are respectively received in the two receiving grooves, as shown in fig. 3 and 4. Thus, when the two handles 80 abut against each other, the pushing operation cannot be continued, that is, the pushing operation is completed, and the one-time needle insertion operation of the puncture element 30 is performed. In addition, since the opposite sides of the housing 20 are accommodated in the two accommodating grooves, the overall structure is compact, and the overall size can be reduced.
In some embodiments, when the two handles 80 are moved to the closed position, the cross-sectional profile of the overall structure of the two handles 80 in the axial direction includes, but is not limited to, regular shapes such as a flattened square, waist, oval, or circular shape, and other irregular shapes. Thus, in the holding process, the outer contour of the whole structure does not hurt hands, and the holding operation is convenient.
In some embodiments, the receiving groove of each grip 80 conforms to the shape of the outer sidewall of the housing 20, which can facilitate reducing the overall volumetric size.
Referring to fig. 2 and 4, in some embodiments, the reset element 92 is a spring sleeved on the first push-pull element 40, the inner wall of the housing 20 is provided with a step 25, the first push-pull element 40 is provided with a connecting seat 41, and opposite ends of the reset element 92 are respectively abutted between the connecting seat 41 and the step 25. The travel block 50 is fixedly mounted on the connecting seat 41, and the travel block 50 is further provided with a recess for receiving the proximal end of the return member 92. In this way, the first push-pull member 40, the puncture member 30, and the stroke block 50 can be automatically reset from the needle-insertion limit position to the needle-withdrawal limit position by the reset force of the reset member 92. In addition, the avoidance groove of the travel block 50 can avoid the proximal end of the spring, so that the avoidance groove cannot interfere with the spring, the resetting work can be smoothly performed, and meanwhile, the structure is compact, and the size can be reduced.
Referring to fig. 2,4 and 9, in some embodiments, the travel block 50 is provided with an arcuate surface 53 that, when assembled, receives the proximal end of the spring to clear the proximal end of the spring.
It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.