CN114617597B - Surgical instrument - Google Patents

Abstract

The invention discloses a surgical instrument; the safety device comprises a jaw assembly, a cutting knife assembly, a control module and a trigger, wherein the trigger comprises a safety switch which is manually triggered; the timing device also comprises a timing unit and a timing display module; when the jaw assembly is in a jaw opening state, the control module controls the safety switch to be in a failure state and controls the firing switch to be in a failure state; when the jaw assembly is changed from the jaw opening state to the jaw closing state, the control module controls the safety switch to be changed from the failure state to the effective state; the safety switch in the effective state is triggered for the first time, the timing unit is started and starts to count time, the timing display module is started, and the firing switch is kept in a failure state when the safety switch is in the effective state. The surgical instrument is triggered by external force of a user to switch the working state of the safety switch, so that the working of the timing display module is controlled to press and time, the pressing and time is fully started after the surgical instrument is prepared, and the pressing time and the subsequent firing effect are ensured.

Description

Surgical instrument

Technical Field

The invention relates to the field of medical instruments, in particular to a surgical instrument capable of avoiding false triggering.

Background

Endoluminal staplers are well known and have found widespread use in intra-luminal procedures such as abdominal cavity.

The stapler includes a jaw assembly, a cutter assembly, and a cartridge assembly, with the jaw assembly first closed to grasp tissue, and then the cutter assembly is driven to cut the tissue while the cutter assembly pushes the cartridge assembly out of the staples to staple the tissue. It is important to note that the tissue has a certain thickness and tissue fluid is contained in the tissue, if the stapler clamps the tissue, the tissue is cut and sutured immediately, the tissue fluid is not squeezed sufficiently, the thickness of the target tissue cannot reach the safe range of effective suturing, phenomena such as inconsistent nails, secondary nails forming and the like can occur, and postoperative symptoms such as bleeding at the cutting suture position can be caused. It is therefore desirable to sufficiently drain tissue fluid from the clamped tissue by pressing to facilitate cutting and stapling by the stapler. In the prior art, a section of pressing time is controlled to be waited after the jaw assembly is closed, tissues are sufficiently pressed in the pressing time, and then the tissues are cut and sutured, but the pressing time of the conventional anastomat does not consider other variable factors such as clamping adjustment actions, and the like, the pressing time cannot ensure good pressing effect, and tissue fluid cannot be sufficiently discharged.

Disclosure of Invention

In view of the deficiencies of the prior art, the present invention is directed to a surgical instrument: the device comprises a jaw assembly, a cutting knife assembly, a control module and a trigger, wherein the trigger is electrically connected with the control module and comprises a jaw opening switch, a jaw closing switch and a firing switch which are manually triggered; the control module controls the jaw assembly to execute a jaw opening action according to the trigger state of the jaw opening switch, executes a jaw closing action according to the trigger state of the jaw closing switch, is in a jaw closing state when the jaw assembly is closed to the bottom, is in a jaw opening state when the jaw assembly is not closed to the bottom, and controls the cutter assembly to execute a cutting feed action according to the trigger state of the firing switch; the trigger further comprises a safety switch triggered manually; the control module also comprises a timing unit provided with preset time for timing; the surgical instrument further comprises a timing indication module for indicating that the timing unit reaches the preset time, wherein the timing indication module is electrically connected with the control module; when the jaw assembly is in a jaw opening state, the control module controls the safety switch to be in a failure state and controls the firing switch to be in a failure state; when the jaw assembly is changed from the jaw open state to the jaw closed state, the control module controls the safety switch to be changed from the failure state to the effective state; the safety switch in the effective state is triggered for the first time, and the timing unit is started and counts time; when the timing unit reaches the preset time, the control module closes the timing unit, controls the timing indication module to indicate that the preset time is reached, and controls the safety switch to be switched from an effective state to an invalid state and the firing switch to be switched from the invalid state to the effective state.

Preferably, when the timing unit counts and the preset time is not reached, the safety switch is triggered again, and then the control module closes the timing unit, controls the timing indication module to indicate that the preset time is reached, and controls the safety switch to be switched from an effective state to an ineffective state and controls the firing switch to be switched from the ineffective state to the effective state.

Preferably, when the firing switch is in an effective state and the cutter assembly is in an initial state of the cutter, the control module triggers the jaw opening switch, closes the timing indication module, controls the jaw assembly to execute the jaw opening action, controls the jaw closing switch to be turned from an ineffective state to an effective state, and controls the firing switch to be turned from the effective state to the ineffective state.

Preferably, the trigger switch in the effective state is triggered, the cutter assembly performs a feeding action and is in a cutter-out state, then the anastomat is operated to perform a retracting action, and when the cutter assembly is converted from the cutter-out state to the cutter-retracting finished state, the control module closes the indication module.

Preferably, when the timing unit counts and the preset time is not reached, the control module triggers the jaw opening switch, closes the timing unit, controls the jaw assembly to execute the jaw opening action, controls the safety switch to be switched from the effective state to the failure state, and controls the jaw closing switch to be switched from the failure state to the effective state.

Preferably, the timing indication module is a timing display module, the timing display module includes an LED lamp, and a state of turning on or off the LED lamp is changed to indicate that the preset time is reached.

Preferably, the timing indication module is a timing sound module, and the timing sound module emits a sound to indicate that the preset time is reached.

Preferably, the timing indication module is further configured to indicate a real-time length of the timing unit for timing operation; when the timing unit is started, the control module simultaneously starts the timing indication module.

Preferably, when the timing unit counts and the preset time is not reached, the jaw opening switch is triggered, the control module further closes the timing unit and the timing indication module, controls the jaw assembly to execute the jaw opening action, controls the safety switch to be switched from the effective state to the failure state, and controls the jaw closing switch to be switched from the failure state to the effective state.

Preferably, the timing indication module is a timing display module, the timing display indication module includes a plurality of LED lamps, and the different lighting numbers of the LED lamps indicate the real-time length and reach the preset time.

Preferably, the timing indication module further comprises a buzzer, and the buzzer sends out sound to indicate that the preset time is reached.

Preferably, the timing indication module is a timing sound module, and the timing sound module is a buzzer, and the buzzer emits different sounds to indicate the real-time length and reach the preset time.

Preferably, the jaw closing switch and the firing switch are integrated into a switch, when the switch is triggered in an effective state, if the jaw assembly is in a jaw opening state, the control module controls the jaw assembly to execute a jaw closing action, if the jaw assembly is in a jaw closing state, and the control module controls the cutter assembly to execute a feeding action.

Preferably, the number of the safety switches is two, and when any one safety switch is triggered, the control module executes the same control.

Preferably, the jaw opening switch is in a disabled state only in the feeding and retracting actions of the cutter assembly, and the rest of the jaw opening switch is in an enabled state.

Compared with the prior art, the invention has the beneficial effects that: the surgical instrument is triggered by external force of a user to switch the working state of the safety switch, so that the working state of the timing display module is controlled, and therefore, the working state of the timing display module is required to be triggered by the external force of the user to work, accurate squeezing time information can be provided, on one hand, a doctor can observe and adjust the position of the jaw assembly for clamping tissues in a sufficient time before timing is started until the position reaches the optimal clamping position of the tissues, on the other hand, the doctor actively triggers the safety switch to time the squeezing time when the optimal clamping position is reached, the tissue is fully squeezed in preset time, the tissue enters the optimal squeezing state, and the subsequent firing effect is ensured.

Drawings

FIG. 1 is a schematic view of the exterior of a first embodiment of the surgical instrument of the present invention;

FIG. 2 is a schematic view of the interior of a first embodiment of the surgical instrument of the present invention;

FIG. 3 is a schematic view of the interior of a surgical instrument of the present invention from a second perspective;

FIG. 4 is a schematic diagram of a control circuit of a first embodiment of the surgical instrument of the present invention;

FIG. 5 is a schematic diagram of a control circuit of a fourth embodiment of the surgical instrument of the present invention;

fig. 6 is a partial schematic view of a fourth embodiment of a surgical instrument of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The user of the surgical instrument may be a clinician who manipulates the surgical instrument during surgery to perform the procedure. The terms "proximal", "posterior" and "distal", "anterior" are used herein with respect to a clinician manipulating a surgical instrument. The terms "proximal", "posterior" and "anterior" refer to portions relatively closer to the clinician, and the terms "distal" and "anterior" refer to portions relatively farther from the clinician. The "left" and "right" are referenced to the position of the surgical instrument shown in FIG. 1, e.g., the end effector is "left" and the cannula is "right". The terms "upper" and "lower" refer to the relative positions of the staple abutment and the cartridge seat of the end effector, specifically, the staple abutment is "upper" and the cartridge seat is "lower". It is to be understood that these orientations of "near", "rear", "far", "front", "left", "right", "up" and "down" are defined for convenience of description, however, surgical instruments may be used in many orientations and positions, and the terms describing relative positional relationships are not intended to be limiting and absolute. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention. The connection in the present invention includes electrical connection and mechanical connection.

Referring now to FIGS. 1-4, a surgical instrument, and more particularly, a powered stapler 100, is provided that includes an operating assembly 10, a shaft assembly 20 extending from the operating assembly 10, and an end effector 30 disposed at one end of the shaft assembly 20. Stapler 100 also includes a drive mechanism including a first drive mechanism and a second drive mechanism, the drive mechanisms being located at the operating assembly 10 and the shaft assembly 20, the specific positional relationships and functions being described below.

The operating assembly 10 includes a power module, a motor 70, and the first transmission described above. The power module is composed of a plurality of batteries which are electrically connected to provide electric power for the motor 80; the first transmission mechanism is connected to the motor, and when the motor obtains electric energy to work, the motor outputs power to drive the first transmission mechanism to move.

The shaft assembly 20 comprises a mandrel 21 and a sleeve 22 sleeved on the mandrel 21, and the shaft assembly 20 belongs to a second transmission mechanism, wherein the first transmission mechanism drives the second transmission mechanism to move.

The end effector 30 includes a jaw assembly and a cartridge assembly (not numbered). The jaw assembly includes a cartridge housing 31 and a staple abutment 32 pivotally connected to the cartridge housing 31, the cartridge housing 31 for operably supporting the cartridge assembly therein, the staple abutment 32 being selectively movable between an open position and a closed position to cooperate with the cartridge housing 31 and the cartridge assembly to clamp or unclamp tissue. The sleeve 22 is connected at one end to the abutment 32 of the end effector 30 and at the other end to a first drive mechanism that drives the sleeve 22 in a rearward and forward movement, with the rearward movement of the sleeve 22 causing the abutment 32 to pivot upward to open the end effector 30, i.e., to open the jaw assembly of the end effector 30, and the forward movement of the sleeve 21 causing the abutment 32 to pivot downward to close the end effector 30, i.e., to close the jaw assembly of the end effector 30.

The stapler also comprises a cutting blade assembly 40 comprising a pusher blade 42 and a non-separable fixed to a cutting blade 41. The spindle 21 has two ends, one end being connected to the first transmission mechanism and the other end being located in the sleeve 22. A part of the push-cutter 42 is located in the sleeve 22 and connected to the other end of the spindle 21, and another part of the push-cutter 42 is connected to the cutter 41. During cutting and stapling, the cutting blade 41 is positioned in the space formed between the cartridge housing 31 and the anvil 32 of the jaw assembly. The first transmission mechanism may drive forward and rearward movement of the mandrel 21. When the cartridge assembly is installed, the mandrel 21 moves forward causing the cutter assembly 40 to move forward, cutting tissue and pushing staples of the cartridge assembly out of the staples to staple the tissue, and the rearward movement of the mandrel 21 causes the cutter assembly 40 to move rearward to return to the original position. The stapler thus achieves power transfer from the motor 80 to the jaw assembly and the cutter assembly 40 via the transmission mechanism described above.

Therefore, the motor 80 drives the jaw assembly to be closed through the transmission mechanism to clamp tissues, then the motor 80 drives the cutting knife assembly 40 to move forward through the transmission mechanism to cut and anastomose the tissues, then the motor 80 drives the cutting knife assembly 40 to move backward through the transmission mechanism, and finally the motor 80 drives the jaw assembly to be opened through the transmission mechanism to loosen the tissues, so that the cutting and anastomosing functions of the anastomat are realized.

The operating assembly 10 further includes a housing including, in positional relationship, a handle housing and a head housing connected to each other, the head housing at least a portion of the transmission mechanism, the handle housing being grippable by a user. Of course, in some embodiments, the handle housing may also house a portion of the transmission mechanism. In some embodiments, the handle housing handle cavity accommodates the motor 80, the head housing head cavity accommodates the battery module, the handle cavity is connected to the head cavity, and the first transmission mechanism is located in the head cavity and the handle cavity.

The operating assembly 10 further includes a trigger 60 and a control module 90, each connected to the power module for obtaining electrical power operation. The control module 90 is a circuit board assembly 90', and is accommodated in the housing, and includes a detection unit, a control unit, a switch driving unit and a switch unit. The trigger is electrically connected to the detection unit, the detection unit is electrically connected to the control unit, the control unit is electrically connected to the switch driving unit, and the switch driving unit is electrically connected to the switch unit. The detection unit detects the state of the trigger, and when triggered, transmits a signal to the control unit, and the control unit analyzes and processes the signal and then controls the anastomat.

The trigger 60 includes a motor control trigger for controlling the motor operating state. When the control unit receives a signal for controlling the motor from the trigger, the control unit generates a corresponding low-voltage PWM signal to the switch driving unit, and the switch driving unit converts the input low-voltage PWM signal into a high-voltage PWM signal which is available to the switch unit and outputs the high-voltage PWM signal to the switch unit, so that the on-off of the switch unit is controlled. The power module is connected with two ends of the motor through the switch unit, and the frequency of on-off of the switch unit determines whether the power module supplies or cuts off power to the motor 80, so that the running state of the motor, namely the rotating speed and the rotating direction of the motor, are determined. In this embodiment, the switch unit includes 4 Mos switches that form an H bridge, and the on-off of the Mos switches of the H bridge determines whether the power module supplies or cuts off power to the motor 80, and the switch driving unit is a Mos driving chip. And the design of the H bridge enables the control unit to control the H bridge to realize forward rotation or reverse rotation of the motor. It should be noted that, the H-bridge control and the forward and reverse rotation control of the motor are both in the prior art, and are not described again. In this embodiment, the control unit is a microcontroller chip.

The motor control trigger of trigger 60 includes a jaw open switch 61, a jaw close switch 62, and a firing switch 63 that are manually triggered by user operation to control the motor start and stop. The jaw opening switch 61, the jaw closing switch 62 and the firing switch 63 have a key provided on the housing, particularly the handle housing, respectively, and the user operated key includes a pressing key, which triggers the corresponding switch, which inputs an electrical signal to the control unit through the detection unit, and the keys corresponding to the jaw opening switch 61, the jaw closing switch 62 and the firing switch 63 are the first key 71, the second key 72 and the third key 73, respectively. In this embodiment, the jaw opening switch 61, the jaw closing switch 62 and the firing switch 63 are all normally open switches, and the control module 90 controls the running state of the motor to be started or stopped according to the trigger states of the jaw opening switch 61, the jaw closing switch 62 and the firing switch 63, so as to execute the corresponding actions of the anastomat. The trigger state includes triggered and not triggered. When triggered, the normally open switch is turned to a closed state, a low potential signal is generated, the control unit of the control module 90 obtains the low potential signal, the motor is controlled to start, the continuously obtained low potential signal indicates that the switch is continuously triggered, when not triggered, the normally open switch is in an open state, a high level is generated, the control unit of the control module 90 obtains the high level signal, and the motor is controlled to stop.

Thus, the user operates the second key 72 to trigger the jaw closing switch 62, the control unit controls the motor 80 to operate, the jaw assembly is driven to execute the jaw closing action, the second key 72 is stopped to be operated, the jaw closing switch 62 is not triggered, and the control unit controls the motor 80 to stop; the user operates the first key 71 to trigger the jaw opening switch 61, the control unit controls the motor to operate, the jaw assembly is driven to execute the jaw opening action, the first key 71 is stopped to be operated, the jaw opening switch 61 is not triggered, and the control unit controls the motor to stop; the user operates the third key 73 to trigger the firing switch 63, the control unit controls the motor to operate to drive the cutting knife assembly to perform the feeding action, and in the feeding process, the third key 73 is stopped to be operated, the firing switch 63 is not triggered, and the control unit controls the motor to stop.

The motor control trigger of trigger 60 further includes a first travel switch 65, a second travel switch 66, a third travel switch 67, and a fourth travel switch 68 to control motor shutdown. The first, second, third and fourth travel switches 65, 66, 67 and 68 are disposed within the housing, particularly the head cavity of the head housing, and cannot be directly activated by hand by a user.

The first and second travel switches 65, 66 are used to detect whether the jaw assembly is in an open or closed position and to stop the motor by the control module 90 to stop the pivoting of the anvil 32. When the nail propping seat 32 is at the closed position, the distance between the distal end of the nail propping seat 32 and the distal end of the nail cartridge seat 31 in the up-down direction is the smallest, and the two clamp tissues, and the jaw assembly is in a jaw closed state; performing a jaw opening action in a jaw closed state, the staple holder 32 being disengaged from the closed position into an open position, the jaw assembly being moved from the jaw closed state into the jaw open state; due to the structural limitations, the abutment cannot be opened without limit, the open position comprises an open-to-bottom position, where the distance between the distal end of abutment 32 and the distal end of cartridge seat 31 in the up-down direction is greatest, both completely unclamping tissue, where the jaw assembly is in a jaw-to-bottom condition, which includes a jaw-to-jaw open-to-bottom condition. The first transmission mechanism comprises a matching part, and the matching part comprises a first lug and a second lug. In the process that the first transmission mechanism drives the nail propping seat 32 to close and rotate by moving the driving sleeve 22 forwards, the nail propping seat 32 reaches a closing position, the first projection triggers the first travel switch 65, the control module 90 receives a signal sent by the first travel switch 65 and instructs the motor to stop rotating, and at the moment, the jaw assembly is closed in place and is in a jaw closing state; the first transmission mechanism triggers the second travel switch 66 when the driving sleeve 22 moves backwards to drive the nail propping seat 32 to open and rotate, the control module 90 receives a signal sent by the second travel switch 66 and instructs the motor to stop rotating, at this time, the jaw assembly is opened in place, and the jaws are opened to the bottom. It should be noted that the first bump and the second bump may be replaced by one bump, and the one bump triggers the first travel switch 65 during forward movement and triggers the second travel switch 66 during backward movement. At this time, the fitting portion includes the one bump.

The third and fourth travel switches 67 and 68 are used to detect the position of the cutter assembly 40 to determine whether the cutter assembly is cutting or retracting to the bottom and stop the movement of the cutter assembly 40 by stopping the motor 80 via the control module 90. The cutter assembly 40 moves under the drive of the above-mentioned transmission mechanism, and moves a moving stroke having a fixed length according to the operation mode of the surgical instrument, and moves forward or backward in the moving stroke, the farthest end of the moving stroke being the front dead point of the forward movement, i.e., the position where cutting is completed, and the nearest end being the start point of the forward movement and the rear dead point of the backward movement.

As described above, the cutter and the push-knife are inseparably disposed, the push-knife pushes the cutter to move forward and fire, the push-knife is driven to reciprocate between the initial position and the fire-bottom position, and the cutter is driven to return to the initial position by the transmission device when the push-knife is reset to the initial position after the push-knife drives the cutter to move from the initial position to the fire-bottom position, i.e. after the firing is completed. In another alternative embodiment, the cutting blade and the pusher blade are separate. After the cutter knife is driven by the push knife piece to move from the initial position to the firing bottom position, namely after the firing is completed, the cutter knife is not moved along with the push knife piece when the push knife piece is driven to reset to the initial position, but is left at the firing bottom position.

Thus, in certain alternative embodiments of the present invention, the cutter assembly 40 is positioned with respect to the pusher member because the cutter may not be reset to the initial position with the pusher member, i.e., not all of the components of the cutter assembly 40 are reciprocally movable between the initial position and the fired-to position.

In various embodiments of the present invention, the cutter is positioned in front of the pusher, and the front end of the pusher or the portion contacting the cutter may be used as a reference portion. When the datum is in the initial position or fired to the bottom position, the push-blade may be considered to be in the corresponding position.

In this embodiment, the initial position is a position where the cutter does not contact the tissue, and may be the rear dead center. The bottom firing position is the position of the cutter after the full stroke of the staple cartridge seat is finished, that is, the position after the firing action is finished, and can be the front dead point.

Before firing, the cutter assembly 40 is in the initial position; performing firing, moving the cutter assembly 40 from the initial position to the fired bottom position, performing cutting of the tissue, and stopping at an intermediate point of the movement stroke, or eventually reaching the fired bottom position; the retracting is performed and the cutter assembly is moved back from the neutral or fired to the bottom position until it returns to the original position. Defining that the cutter assembly 40 is in the cutter initial state when being positioned at the initial position, and the state that the cutter assembly 40 is away from the initial position is in the cutter-out state, including being positioned at the middle point or being triggered to the bottom position; the cutting knife assembly is in a knife-out-bottom state when the cutting knife assembly is positioned at the bottom-firing position; according to whether the firing occurs, the initial state of the cutter is divided into two different states, namely a cutter-unfinished state and a cutter-retreated state, if the firing does not occur and is positioned at the initial position, the cutter-unfinished state is positioned, and if the firing occurs and is positioned at the initial position, the cutter-retreated state is positioned.

The matching part of the first transmission mechanism further comprises a third lug and a fourth lug. In the process that the first transmission mechanism drives the cutter assembly 40 to move forwards through the mandrel 21, the front dead center is reached, the third projection triggers the third travel switch 67, the control module 90 receives a signal sent by the third travel switch 67 and instructs the motor to stop rotating, and at the moment, the cutter assembly 40 is cut to the bottom; in the process that the first transmission mechanism drives the cutter assembly 40 to move backwards through the mandrel 31, the rear dead center is reached, the fourth projection triggers the fourth travel switch 68, the control module 90 receives a signal sent by the fourth travel switch and instructs the motor to stop rotating, and at this time, the cutter assembly is retracted, namely, the cutter is retracted to the bottom. It should be noted that the third bump and the fourth bump may be replaced by one bump.

In this embodiment, the first travel switch 65, the second travel switch 66, the third travel switch 67 and the fourth travel switch 68 are all normally open switches, and the motor is controlled to stop when triggered.

Further, when the user triggers the firing switch 63 and keeps triggering, the motor 80 rotates forward, the feeding motion is performed until the third travel switch 67 is triggered, the control unit controls the motor to stop, at this time, the user releases the third key 73 and no longer triggers the firing switch 63, the control unit automatically controls the motor 80 to rotate reversely, the retracting motion is performed, and the cutter assembly 40 moves backwards until the fourth travel switch 68 is triggered to stop. Thus, when the cutter assembly 40 completes the firing, the cutter is automatically retracted by one step by releasing the third key 61, thereby saving the operation time of the user.

It should be noted that, the first component of the first transmission mechanism drives the sleeve 22 to move so as to drive the jaw component to open and close, the second component of the first transmission mechanism drives the mandrel 31 to move so as to drive the cutter component 40 to feed and retract, and the first component and the second component do not act simultaneously so as to satisfy the action logic relationship between the jaw component and the cutter component 40. The first component includes a first bump and a second bump, or the first component includes one bump instead of the first bump and the second bump. The second component includes a third bump and a fourth bump, or the second component includes one bump instead of the third bump and the fourth bump.

The above is an embodiment that employs a mechanical means of engagement of four travel switches with the protrusions to index the jaw open/closed into position and firing/retracting into position. However, the recognition of whether the jaws open/close, fire/retract are in place is not limited to the embodiment described above that employs a travel switch to make mechanical contact with the protrusions. In fact, the opening and closing of the jaws, as well as the firing and retraction of the cutter assembly 40, are accomplished by the motor 80 through the drive sleeve 22 and the mandrel 21, respectively. Thus, in other alternative embodiments, it is possible to identify whether the jaws are open/closed in place and whether the cutter assembly 40 is firing/retracting in place by detecting the axial displacement of the sleeve 22 and the mandrel 21, or the number of turns of the motor 80.

In particular, the opening and closing of the jaws will be described as an example. As described above, the motor 80 drives the sleeve 82 forward, which can cause the jaw assembly to switch from an open state to a closed state. Conversely, the motor 80 drives the sleeve 82 rearward to switch the jaw assembly from the closed to the open condition. The axial movement distance of the sleeve 82 is fixed during the switching of the jaw assembly from open to closed or from closed to open to closed, and the number of turns the motor 80 drives the sleeve 82 to move axially a distance is fixed.

Based on this, in an alternative embodiment, the axial movement distance of the sleeve 82 can be detected by providing a displacement sensor or proximity sensor on the sleeve 82 to determine whether the sleeve 82 is moved forward or backward in place, thereby reflecting whether the jaw assembly is closed or open to the bottom.

The displacement sensor or proximity sensor equidistant detection elements described above may also be replaced by other forms of construction, such as, for example, photoelectric sensors, infrared sensors, etc., which are not listed here.

From the above, the principle is that four position detection units are used to detect four position states respectively: the cutting knife assembly is in the initial position, the cutting knife assembly is in the bottom cutting position, the jaw assembly is in the open position, and the jaw assembly is in the closed bottom position.

The number of the motors is one, the first transmission mechanism comprises a gear and a clutch mechanism, the gear is driven by the motor, the gear selectively drives the first component and the second component through the clutch mechanism to realize action logic relationship, the first component can be a push rod matched with the clutch mechanism, the second component can be a rack matched with the clutch mechanism, and the specific structure composition of the first transmission mechanism is described in the prior application CN202010365525.0 of the applicant and is not repeated here. Or the number of motors is two, and first drive mechanism includes two gears, and every gear is driven by different motors respectively, and first subassembly includes first rack, and the second subassembly includes the second rack, and first rack, second rack mesh with different gears respectively, stop through the start of different motors, realize action logic relation, and above-mentioned content is prior art, and no more detailed description here.

Further, the housing is also provided with a forcible entry button 79 that is manually pressed by the user, mechanically connected to the third travel switch 67. When the trigger switch is stopped in the trigger action and the motor stops rotating forward and the cutter assembly is not triggered to the bottom at the middle point, the user can select to forcedly retract the cutter by pressing the forcedly retract button 79, the forcedly retract button triggers the third travel switch 67, and the control unit receives a low-level signal of the switch to start the motor to rotate reversely until the fourth travel switch 69 is triggered to stop rotating reversely, so that the one-step retraction to the bottom is forcedly realized.

It should be noted that, in one execution period, the stapler needs to sequentially perform the jaw closing action, the firing action, the retracting action and the jaw opening action to complete the whole working process, and the four actions corresponding to the whole working process preferably sequentially drive the first component, the second component and the first component by sequentially driving the motors by the control module 90 to sequentially perform the jaw closing action, the firing action, the retracting action and the jaw opening action when the same motor is used to power the first component and the second component of the first transmission mechanism.

The trigger 60 further includes a safety switch 69 manually triggered by a user operation, and is electrically connected to the control module 90. The safety switch 69 has a button, a fourth button 74, provided on the housing, in particular on the handle housing, and the user operated button comprises a push button which triggers the corresponding switch which inputs an electrical signal to the control unit via the detection unit. The control module 90 further includes a timing unit, which is set for a preset time, for example, 15s, and starts to count, and when the count reaches the preset time, the timing unit is turned off and the count is cleared. The timing unit may be a circuit module independent of the microcontroller, or may be a timing unit carried by the microcontroller. The anastomat also comprises a timing indication module which is electrically connected with the control unit and has two functions: first function: the timing unit is used for indicating the timing unit to reach the preset time and informing the user of the state; the second function: the control module 90 is configured to instruct the timing unit to count the real-time length of the work, so that the user knows the elapsed time length, and when the timing unit is turned on, the timing instruction module is turned on at the same time to implement the second function. For example, the timing unit counts 10s, and the timing indication module indicates that 10s has elapsed.

When the jaw assembly is in the jaw open state, the control module 90 controls the safety switch 69 to be in the failure state and controls the firing switch 63 to be in the failure state; when the jaw closing action is performed, the jaw assembly is changed from the jaw open state to the jaw closed state, and the control module 90 controls the safety switch 69 to be changed from the invalid state to the valid state and the jaw closed switch 62 to be changed from the valid state to the invalid state; the user triggers the safety switch 69 in the effective state for the first time, the timing unit is started and counts time, and the timing indication module is started; when the timing unit reaches the preset time, the control module 90 turns off the timing unit, controls the timing indicating module to indicate that the preset time is reached, and controls the safety switch 69 to be switched from the effective state to the invalid state and the firing switch 63 to be switched from the invalid state to the effective state. The firing switch 63 remains disabled when the safety switch 69 is in the active state, i.e., even if the user operates the firing switch 63, the firing switch 63 is disabled and the stapler is not fired.

Thus, the safety switch 63, the timing unit and the timing indication module form a pressing and holding mechanism which is convenient for a user to know that the pressing and holding mechanism is sufficiently pressed, the pressing and holding mechanism can enable the jaw assembly to press the target tissue for a certain duration, and tissue fluid is discharged more sufficiently, namely, the pressing and holding mechanism can not allow the cutter assembly to move forwards for a certain duration and keep the jaw assembly closed so as to improve the pressing effect of the jaw assembly on the tissue. In the scheme, the combination of the timing unit and the timing indication module ensures enough squeezing time on one hand and the squeezing effect on the other hand, is convenient for a user to know that the preset squeezing time is reached, master the operation rhythm and promote user experience. In the above scheme, the effective state and the ineffective state of the jaw closing switch 62, the safety switch 69 and the firing switch 63 are switched, firstly, the jaw closing, the squeezing timing and the firing have a fixed sequence, the jaw closing, the squeezing timing and the firing are required to be performed at first, the sequence of the two actions before the firing cannot be changed, secondly, only one switch is in the effective state between the three switches at the same time, and the three actions cannot be affected mutually. In the above arrangement, the safety switch 69 facilitates the physician's autonomous control of when to start the timing of the press retention mechanism: in the use of the anastomat, the jaw assembly is closed once to clamp the tissue possibly without one step, for example, the tissue is possibly clamped askew, clamped more or clamped less, adjustment is needed, if the tissue is not fully prepared and the pressing timing is started, the actual pressing time is insufficient although the timing of the timing indication module is finished, a doctor cannot accurately know the actual pressing time, tissue fluid is insufficiently discharged to start the firing, the firing effect is poor, the safety switch 69 is adopted to start the pressing timing in the scheme, on one hand, the doctor can fully observe and adjust the position of the jaw assembly for clamping the tissue until the tissue reaches the optimal clamping position, on the other hand, the doctor actively triggers the safety switch 69 to time the pressing time when the optimal clamping position, the tissue is fully pressed when the preset time is ensured, and the subsequent firing effect is ensured.

When the pressing and holding mechanism is closed, the pressing and timing action is completed, the anastomat can execute the firing action, and the pressing and timing action is interrupted, and the anastomat returns to the jaw action and cannot fire. Specifically, the press holding mechanism is closed in three ways:

The first way is: as described above, when the timing unit counts up to the preset time, the control module 90 turns off the timing unit, controls the timing indicating module to indicate that the preset time is reached, and controls the firing switch 63 to be turned from the disabled state to the active state, and controls the safety switch 69 to be turned from the active state to the disabled state. I.e. the press timing action is completed. In the scheme, the pressing retaining mechanism is automatically closed when the preset time is reached, the trigger switch is turned into effect, the sufficient pressing time is ensured, and the pressing effect can be improved; the timing indication module always indicates that the preset time is reached, keeps informing a doctor that the squeezing is completed, and the doctor can independently select when to fire, for example, fire is started after some preparation work is done, so that the user experience is improved.

The second way is: if the doctor considers that the tissue to be cut and sutured is suitable for direct cutting and suturing or short-time squeezing, a certain time period is not needed to be squeezed, in order to save time, the second mode, that is, the safety switch 69 is triggered for the first time when the safety switch 69 is in an effective state, the safety switch 69 is triggered again when the preset time is not reached in the timing of the timing unit, the control module 90 turns off the timing unit, controls the timing indication module to indicate that the preset time is reached, and controls the safety switch 69 to be switched from the effective state to the ineffective state and controls the firing switch 63 to be switched from the ineffective state to the effective state, is adopted. I.e. the press timing action is completed. Although the timing module does not reach the preset time, the timing indication module indicates that the preset time is reached, and the purpose of the timing module is to indicate the completion of the pressing timing action to the user, and the timing module can trigger. In the scheme, the user is not willing to wait and actively close the pressing and holding mechanism, so that the user experience is improved; meanwhile, the timing indication module still indicates that the preset time is reached all the time so as to prompt a user to trigger at any time, and user experience is improved.

Third mode: when the pressing timing action is entered, it is possible that the doctor needs to readjust the jaw assembly to clamp the tissue, and does not need to enter the firing action, at this time, a third mode may be adopted, namely, the safety switch 69 is triggered for the first time when the safety switch 69 is in an active state, the jaw opening switch is triggered when the timing unit is in timing and the preset time is not reached, the control module 90 closes the timing unit and the timing indication module, controls the jaw assembly to execute the jaw opening action, and controls the safety switch 69 to be turned from the active state to the inactive state and controls the jaw closing switch to be turned from the inactive state to the active state. I.e. the press timing action is interrupted. During the press timing action, the jaw open switch remains active at all times. According to the scheme, the pressing retaining mechanism is actively closed for a user, the pressing timing action can be returned to the jaw opening state at any time and the jaw closing action is executed again, and the repeated clamping position adjustment is executed. It should be noted that, when the safety switch 69 is in the active state, if the safety switch 69 is not triggered for the first time, the timing unit and the timing indication module are not started, and at this time, the jaw opening switch can still be triggered to open the jaw assembly to achieve the purpose.

In the first and second modes, the pressing timing action is completed, and the timing indication module always keeps the indication to reach the preset time to inform the anastomat that the pressing is completed and the user can fire at any time. Further, there may be two action choices: the first action is selected to be a normal firing, the user triggers the firing switch 63, the stapler performs a feeding action, the second action is selected to close the timing indication module and retract in the execution sequence to perform the jaw actions, as follows: when the firing switch 63 is in an active state and the cutter assembly 40 is in a cutter initial state, the jaw opening switch 61 is in an active state, the jaw opening switch 61 is triggered, the control module 90 closes the timing indication module, the jaw assembly is controlled to execute a jaw opening action, and the jaw closing switch 62 is controlled to be switched from a failure state to an active state. When the pressing timing action is completed in the first mode and the second mode, the user can fire for the first time at any time, and at the moment, the scheme (namely the second action selection) provides the user with the option of still returning to the jaw closing action, and the re-clamping position adjustment is performed. The effect is the same as that of the third mode, so that a doctor has more time to consider whether to excite before firing, the operability of the anastomat is improved, and the user experience is improved.

The operation of the pressing and holding mechanism comprises: pressing the fourth key 74 and releasing instantly, and starting the timing unit and the timing indication module to work until the work is finished and reaching the preset time; the press retention mechanism operation is terminated including: pressing the fourth key 74 and releasing it instantly, pressing the fourth key 74 again and releasing it instantly within a preset time; the press retention mechanism operation being interrupted includes: the first key 71 is pressed. The preset time, that is, the pressing duration, may be set to 10 seconds, 20 seconds, 30 seconds, 40 seconds, 50 seconds, and 60 seconds, and the pressing effect of 10 seconds is inferior, but it is acceptable that the longer the time is, the better the pressing effect is, but the pressing effect is not linearly improved with the time extension, but exceeds 15 seconds, and the user feels the waiting time too long, and the use experience of the user is affected. The press holding time was set to 15 seconds, which is a balance point obtained between the waiting time and the press effect.

After the above-mentioned pressing timing action is completed, the user can enter the firing action, and can operate the firing switch 63 to implement the feeding action, then implement the retracting action, and when the cutter assembly 40 is transferred from the cutter-out state to the cutter-retracting-completed state, the control module 90 can control the closing timing indication module, and can enter the jaw opening action. That is, during the firing and retracting actions, the timing indicator module will always maintain an indication state, i.e. indicate that the preset time is reached, indicating that the pressing is completed, such timing indicator module well alerts the doctor that the cutter assembly is currently in the ready-to-get-out state or the out-of-get state, and that the cutter is about to be applied to the human tissue or is being applied to the human tissue, and should be carefully operated; the timing indication module is closed at the same time when the cutter is completely retracted, and the closing action also plays a role in prompting the user that the cutter is retracted, so that the cutter 42 enters a safe position and cannot act on human tissues. Conversely, if the timing indication module is turned off when the pressing timing action is completed and the firing switch 63 is triggered for the first time, the above-mentioned beneficial effects are not achieved, and the firing action, the retracting action and the jaw opening action have no boundary feeling, so that the user experience is poor.

And the maximum time length indicated by the timing indication module is the preset time.

In this embodiment, the timing indication module is a timing display module 110 disposed on the housing, especially the head housing, and capable of being directly observed by a user, and includes an indication lamp, for example, the indication lamp includes a plurality of LED lamps, and the plurality of LED lamps are sequentially turned on, the first LED lamp is turned on to indicate starting timing, and the last LED lamp is turned on to indicate ending timing. The number, arrangement form, color and lighting time interval of the LED lamps can be set according to the requirement, for example, 4 LED lamps can be set and are linearly arranged on the handle assembly, the control module lights 1 LED lamp every 5 seconds and keeps the lighting state continuously, and the real-time length of the timing work of the indication timing unit is realized according to the number of the real-time lights. After the timing is finished, all the LED lamps are kept in a lighting state, namely the timing unit is instructed to reach the preset time, and all the 4 LEDs are lighted for 15 seconds. Other numbers of LED lamps may be selected, for example, 5, 6, etc. The time interval of lighting may also be set, for example, to 1 second, 4 seconds, 10 seconds, or the like. In other embodiments, a mode that a plurality of LEDs are turned off sequentially is adopted, all the LEDs are turned on to indicate to start timing, the last LED remains on until the last LED is turned on to indicate to end timing, when the firing action is completed, the last LED is turned off, and when the firing action is completed, the timing indication module is turned off. The above-mentioned mode that adopts the timing display module, the change of the state of turning on or turning off of LED lamp is with the instruction to reach preset time, and the state change that lights is that the number of lights is progressively increased and is increased to predetermined number and indicate to reach preset time promptly, and the state change that turns off is that the number of turning off is progressively increased and is increased to another predetermined number and indicate to reach preset time promptly.

The timing indication module also comprises an alarm, and sounds when the timing is finished to indicate that the timing is finished. The alarm is a buzzer, and the duration of the sound of the buzzer can be set according to the needs.

The failure state of the switch means that the switch is triggered, but the anastomat does not execute the action, and the effective state means that the switch is triggered, and the anastomat executes the corresponding action. In this embodiment, the switch is triggered in the failure state, and still sends a signal to the control module, but the control module 90 does not analyze and process the signal, and does not instruct the motor to act or control the timing unit or control the timing display module 110 according to the signal. In contrast, when the switch is activated in the active state, the control module 90 will perform corresponding control according to the signal. The first, second, third and fourth travel switches 65, 66, 67 and 68 are default to be in an active state all the time after the stapler is powered on, and the jaw closing switch 62, the safety switch 63 and the firing switch 69 are all switched between an active state and an inactive state as described in the above scheme, and the jaw opening switch 61 is only in an inactive state in the feeding and retracting actions, and is in an active state at the rest of the time.

Second embodiment

Different from the first embodiment, the timing indication module is a timing sound module which is arranged in the shell and can be heard by a user, and the functions and the control modes are the same as those of the timing display module, and are not repeated. The difference is that the timing sound module indicates the real-time length of the timing operation of the timing unit with different sounds, such as duration, volume, tone, etc., for example, different tones of "do", "get" are used to indicate that the start is 0s, 5s, 10s, 15s, respectively, and that the "get" is continuously or intermittently sent to indicate that the preset time is reached, and for example, different instrument sounds or human sounds are used to report the time, there are various ways to provide the real-time length of the sound indication, not being listed herein.

Third embodiment

Unlike the second embodiment, the timing indication module of the third embodiment has only the first function described above: the timing unit is used for indicating the timing unit to reach the preset time and informing the user of the state, and the second function is not provided. Thus, the control of the second function is canceled: in the third embodiment, when the timing unit is turned on, the timing indication module is not turned on at the same time, and only when the timing unit reaches the preset time, the timing indication module is turned on and indicates that the preset time is reached; when the timing unit counts and the preset time is not reached, the jaw opening switch is triggered, and the control module only needs to close the timing unit and does not need to close the timing indication module.

Accordingly, the timing display module 110 of the third embodiment includes an LED lamp that is turned on when the timing unit reaches the preset time or when the safety switch is triggered for the second time as described above, and is continuously turned on to indicate that the preset time is reached.

In other embodiments, the timing indication module may be a timing sound module with a sound indication, which is a buzzer, and the buzzer is turned on to make a sound only when the timing unit reaches the preset time or the safety switch is triggered for the second time as described above, and continuously make a sound to indicate that the preset time is reached, and the timing sound module is not turned on during the timer timing.

Fourth embodiment

As shown in fig. 5-6, unlike the first embodiment, the jaw closing switch 62 and the firing switch 63 of the fourth embodiment are integrated into a switch-closing/firing switch 62', when the switch is triggered in an active state, if the jaw assembly is in a jaw open state, the control module 90 will control the jaw assembly to perform a jaw closing action when receiving a signal sent by the control module, if the jaw assembly is in a jaw closed state, the control unit will control the cutter assembly 40 to perform a feeding action when receiving a signal sent by the control module, and the closing/firing switch 62' is switched from a triggered state to an un-triggered state when the third travel switch is triggered, so that the control unit controls the cutter assembly 40 to perform an automatic one-step retracting action. Specifically, the closing/firing switch 62' operates as follows: 1) The jaw assembly is in a jaw open state, the closing/firing switch 62 'is in an active state, the closing/firing switch 62' is triggered, and the control module controls the closing action of the jaws; 2) When the jaw assembly is closed to the bottom, the jaw assembly turns to a jaw closed state and the close/fire switch 62' turns to a disabled state; 3) Triggering the safety switch 69, starting the pressing and maintaining mechanism until the pressing timing action is completed, or triggering the safety switch 69 again, wherein the safety switch 69 fails, and the closing/firing switch 62' is turned into an effective state; 4) The control module 90 controls the firing action to be performed by triggering the closing/firing switch 62; 5) After the cut is completed-to-end, the trigger of the close/fire switch 62 'is stopped, the retracting action of automatically retracting one step to end is performed until the retracting is completed, the cutter assembly 40 is in the retracting completed state, and the close/fire switch 62' is turned to the disabled state. Further, as shown in fig. 6, the close/fire switch 62' is triggered by one key, i.e., the second key 72, and the third key 73 is not provided.

Fifth embodiment

Unlike the second embodiment described above, the number of the safety switches 69 of the fifth embodiment is two, the two safety switches 69 perform the same function in common, and the active state and the inactive state of the two safety switches are switched at the same time and kept identical: the jaw assembly is changed from a jaw opening state to a jaw closing state, and then the two safety switches are changed from a failure state to an effective state; when any one of the safety switches in the effective state is triggered for the first time, the timing unit is started and counts time, and the timing display module is started; when the timing reaches the preset time, both the safety switches are switched from the effective state to the failure state; when the timing does not reach the preset time, triggering any safety switch in the effective state for the second time, and switching the two safety switches from the effective state to the failure state. The control module 90 performs the same control when any one of the safety switches is triggered. Furthermore, each safety switch is provided with a key, the two keys are respectively arranged on two sides of the shell, particularly the handle shell, and the user can jointly execute the same function no matter which of the two keys is pressed, so that the principle is not repeated. Further, the pressing directions of the two keys are opposite and the two keys are fixedly connected, so that one of the two keys cannot be pressed simultaneously when the other key is pressed, and control conflict caused by the fact that the two safety switches are triggered simultaneously is avoided.

It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.

The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.

Claims (14)

1. A surgical instrument includes a jaw assembly, a cutting blade assembly, a control module, and a trigger,

The trigger is electrically connected with the control module and comprises a manually triggered jaw opening switch, a manually triggered jaw closing switch and a manually triggered firing switch;

The control module controls the jaw assembly to execute a jaw opening action according to the trigger state of the jaw opening switch, executes a jaw closing action according to the trigger state of the jaw closing switch, is in a jaw closing state when the jaw assembly is closed to the bottom, is in a jaw opening state when the jaw assembly is not closed to the bottom, and controls the cutter assembly to execute a cutting feed action according to the trigger state of the firing switch;

The method is characterized in that:

The trigger further comprises a safety switch triggered manually;

the control module also comprises a timing unit provided with preset time for timing;

The surgical instrument further comprises a timing indication module for indicating that the timing unit reaches the preset time, the timing indication module being electrically connected with the control module;

When the jaw assembly is in a jaw opening state, the control module controls the safety switch to be in a failure state and controls the firing switch to be in a failure state; when the jaw assembly is changed from the jaw open state to the jaw closed state, the control module controls the safety switch to be changed from the failure state to the effective state; the safety switch in the effective state is triggered for the first time, and the timing unit is started and counts time;

When the timing unit reaches the preset time, the control module closes the timing unit, controls the timing indication module to indicate that the preset time is reached, and controls the safety switch to be switched from an effective state to an invalid state and the firing switch to be switched from the invalid state to the effective state;

When the firing switch is in an effective state and the cutting knife assembly is in an initial state of the cutting knife, the control module triggers the jaw opening switch to close the timing indication module, controls the jaw assembly to execute the jaw opening action, controls the jaw closing switch to be turned from an ineffective state to an effective state and controls the firing switch to be turned from the effective state to the ineffective state.

2. The surgical instrument of claim 1, wherein when the timing unit is in the process of timing and the preset time is not reached, the safety switch is triggered again, and the control module turns off the timing unit, controls the timing indication module to indicate that the preset time is reached, and controls the safety switch to change from an active state to an inactive state and the firing switch to change from an inactive state to an active state.

3. The surgical instrument of claim 1 or 2, wherein the firing switch is triggered in an active state, the cutter assembly performs a feeding action and is in a discharge state, and then the stapler is operated to perform a retracting action, and the control module turns off the indication module when the cutter assembly transitions from the discharge state to the retracting completed state.

4. The surgical instrument of claim 1 or 2, wherein when the timing unit is in the process of timing and the preset time is not reached, the control module is configured to trigger the jaw open switch, close the timing unit, control the jaw assembly to perform a jaw open action, and control the safety switch to transition from an active state to an inactive state, and control the jaw close switch to transition from an inactive state to an active state.

5. The surgical instrument of claim 1 or 2, wherein the timing indication module is a timing display module comprising an LED light whose on or off state changes to indicate that the preset time is reached.

6. The surgical instrument of claim 1 or 2, wherein the timing indication module is a timing sound module that sounds to indicate that the preset time is reached.

7. The surgical instrument of claim 1 or 2, wherein the timing indication module is further configured to indicate a length of time in real-time for which the timing unit is to be timed;

When the timing unit is started, the control module simultaneously starts the timing indication module.

8. The surgical instrument of claim 7, wherein the control module further turns off the timing unit and timing indication module when the timing unit is in the middle of timing and the preset time is not reached, controls the jaw assembly to perform a jaw opening action, and controls the safety switch to transition from an active state to an inactive state, and controls the jaw closing switch to transition from an inactive state to an active state.

9. The surgical instrument of claim 8, wherein the timing indication module is a timing display module comprising a plurality of LED lights that illuminate different numbers to indicate a length of time in real-time and to reach the preset time.

10. The surgical instrument of claim 9, wherein the timing indication module further comprises a buzzer that sounds to indicate the preset time is reached.

11. The surgical instrument of claim 8, wherein the timing indication module is a timing sound module that is a buzzer that sounds different sounds to indicate a length of time in real time and to reach the preset time.

12. The surgical instrument of claim 1 or 2, wherein the jaw closing switch and the firing switch are integrated into one switch, wherein the control module controls the jaw assembly to perform a jaw closing action, such as the jaw assembly being in a jaw closed state, when the switch is activated in an active state, such as the jaw assembly being in a jaw open state, and wherein the control module controls the cutter assembly to perform a feeding action.

13. A surgical instrument according to claim 1 or claim 2, wherein the number of safety switches is two, and the control module performs the same control when any one of the safety switches is triggered.

14. The surgical instrument of claim 1 or 2, wherein the jaw open switch is deactivated only in a feeding and retracting action of the cutting blade assembly, the remainder being active.