CN114617596A

CN114617596A - Squeezing time acquisition method and surgical instrument

Info

Publication number: CN114617596A
Application number: CN202011447118.0A
Authority: CN
Inventors: 孙宝峰; 孙海盟
Original assignee: Fengh Medical Co ltd
Current assignee: Fengh Medical Co ltd
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2022-06-14
Also published as: WO2022122002A1

Abstract

The invention discloses a squeezing time acquisition method of a surgical instrument and the surgical instrument, wherein the surgical instrument comprises a safety switch, a firing switch and a timing unit, the firing switch is in a failure state when the safety switch is in an effective state, and a user operates the safety switch in the effective state to unlock the firing switch so as to enable the firing switch to be in the effective state; the squeezing time obtaining method comprises the following steps: when the safety switch in an effective state is triggered for the first time, the timing unit is started to start timing; triggering the trigger switch in an effective state for the first time, and closing the timing unit; and acquiring the time length timed by the timing unit, wherein the time length is the squeezing time, storing the squeezing time, and resetting the timing unit. The invention takes the trigger signal of the safety switch as a timing starting signal and takes the trigger signal of the trigger switch as a timing ending signal, thereby obtaining the actual working parameter of squeezing time and being convenient for analysis and reference after operation.

Description

Squeezing time acquisition method and surgical instrument

Technical Field

The invention relates to the field of surgical instruments, in particular to a squeezing time acquisition method and a surgical instrument, which are convenient for collecting actual squeezing time.

Background

As is well known, the endocavity cutting stapler has been commonly used in the abdominal cavity and other intracavitary operations. The anastomat comprises a jaw assembly and a cutting knife assembly, when the jaw assembly is aligned with target tissue, the jaws are driven to be closed to clamp, when the jaws are closed to the bottom, the electric anastomat immediately enters a pressing state, combined liquid in the clamped tissue in the pressing state is pressed and discharged, the jaws keep the closed state, and the anastomat keeps the pressing state until the anastomat performs a triggering operation to cut and suture the tissue, namely, the anastomat exits from the pressing state once triggered. The duration of the pressing state, i.e. the pressing time relationship, has an important influence on whether the tissue fluid is sufficiently discharged, which influences the cutting and suturing effect of the tissue. To better drain interstitial fluid, typically, a power-driven cutting stapler will prompt the operator to maintain the squeezed state for no less than a squeeze time parameter after the end effector is closed in place. However, the operation of maintaining the pressing state (i.e., the pressing waiting) is an optional operation, and in the actual operation, the operator ignores the pressing waiting time and performs the next operation due to the use habit and the like, and the time for which the pressing waiting lasts is different among different operators. The existing electric cutting anastomat cannot acquire squeezing time, and is not beneficial to analyzing and evaluating the operation process and the operation effect after the operation.

Disclosure of Invention

In view of the deficiencies of the prior art, the present invention is directed to a squeezing time acquisition method and surgical instrument.

The invention provides a method for acquiring squeezing time of a surgical instrument, which comprises the following steps: the surgical instrument comprises a safety switch, a trigger switch and a timing unit, wherein the trigger switch is in a failure state when the safety switch is in an effective state, and a user operates the safety switch in the effective state to unlock the trigger switch so as to enable the trigger switch to be in the effective state; the squeezing time obtaining method comprises the following steps: step S10: when the safety switch in an effective state is triggered for the first time, the timing unit is started to start timing; step S20: triggering the trigger switch in an effective state for the first time, and closing the timing unit; step S30: and acquiring the time length timed by the timing unit, wherein the time length is the squeezing time, storing the squeezing time, and resetting the timing unit.

Preferably, the surgical instrument further comprises a jaw open switch, comprising between step S10 and step S20 step S11: when the safety switch is in an effective state, the jaw opening switch is triggered, the safety switch is converted into a failure state from the effective state, the trigger switch keeps the failure state, the timing unit is closed, and the timing unit is cleared.

Preferably, the surgical instrument further comprises a jaw open switch, comprising between step S10 and step S20 step S12: and a user operates the safety switch in the effective state to unlock the trigger switch to enable the trigger switch to be in the effective state, the jaw opening switch is triggered, the safety switch keeps in the failure state, the trigger switch is switched from the effective state to the failure state, the timing unit is closed, and the timing unit is cleared.

Preferably, the surgical instrument further comprises a timing unit, the timing unit being provided with a preset time; the step that the user operates the safety switch in the effective state to unlock the trigger switch so that the trigger switch is in the effective state comprises the following steps: when the safety switch in the effective state is triggered for the first time, the timing unit is started, when the preset time is reached, the safety switch is switched from the effective state to the invalid state, and the trigger switch is switched from the invalid state to the effective state.

Preferably, when the preset time is not reached, the safety switch is triggered again, the safety switch is switched from an active state to a failure state, and the trigger switch is switched from the failure state to the active state.

Preferably, the step of the user operating the safety switch in the active state to unlock the trigger switch to enable the trigger switch to be in the active state includes: when the safety switch is triggered for the first time in an effective state, the safety switch is switched to a failure state from the effective state, and the trigger switch is switched to the effective state from the failure state.

Preferably, the surgical instrument further comprises a jaw closing switch, and the step S10 is preceded by the steps of: and triggering the jaw closing switch to enable the jaw assembly to perform jaw closing action, wherein when the jaw assembly is converted from the opening state to the closing state, the safety switch is converted from the failure state to the effective state.

Preferably, the surgical instrument is a powered stapler.

The invention also provides a squeezing time acquisition method of a surgical instrument, wherein the surgical instrument comprises a jaw component, a cutting knife component, a firing switch, a jaw closing switch and a timing unit, and the squeezing time acquisition method comprises the following steps: step S10: triggering the jaw closing switch to enable the jaw assembly to execute jaw closing action, and starting a timing unit to start timing when the jaw assembly is converted from an open state to a closed state; step S20: triggering the trigger switch to enable the cutting knife assembly to start executing a trigger action, and closing the timing unit; step S30: and acquiring the time length timed by the timing unit, wherein the time length is the squeezing time, storing the squeezing time, and resetting the timing unit.

Preferably, the surgical instrument further comprises a jaw opening switch, and the step S11 is included between the steps S10 and S20, wherein when the jaw opening switch is triggered, the timing unit is closed, and the timing unit is cleared.

Preferably, the surgical instrument further comprises a safety switch, the firing switch is in a failure state when the safety switch is in an effective state, and a user operates the safety switch in the effective state to unlock the firing switch to be in the effective state; the step S10 further includes: when the jaw assembly is changed from the open state to the closed state, the safety switch is changed from the failure state to the active state;

preferably, the surgical instrument further comprises a timing unit, the timing unit being provided with a preset time; the step of enabling the user to operate the safety switch in the effective state to unlock the trigger switch so that the trigger switch is in the effective state comprises the following steps: when the safety switch in the effective state is triggered for the first time, the timing unit is started, when the preset time is reached, the safety switch is switched from the effective state to the invalid state, and the trigger switch is switched from the invalid state to the effective state.

Preferably, the step of the user operating the safety switch in the active state to unlock the trigger switch to enable the trigger switch to be in the active state includes: when the safety switch in the effective state is triggered for the first time, the safety switch is switched from the effective state to the invalid state, and the trigger switch is switched from the invalid state to the effective state.

Preferably, the surgical instrument is a powered stapler.

The present invention also provides a surgical instrument comprising a memory, a processor, and a program stored on the memory and executable on the processor, the processor implementing any of the above-described press time acquisition methods when executing the program.

Compared with the prior art, the invention has the beneficial effects that: the invention can obtain the squeezing time, and is beneficial to the analysis and evaluation after the operation.

Description of the drawings

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

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

FIG. 3 is a schematic internal construction view from a second perspective of the first embodiment of the surgical instrument of the present invention;

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

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

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

FIG. 7 is a flow chart of a squeezing time acquisition method of the first embodiment of the surgical instrument of the present invention;

FIG. 8 is a flow chart of another method of squeeze time acquisition of the first embodiment of the surgical instrument of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The user of the surgical instrument may be a clinician operating the surgical instrument to perform a procedure during a procedure. The terms "proximal", "posterior" and "distal", "anterior" are used herein with respect to the clinician manipulating the surgical instrument. The terms "proximal" and "posterior" refer to portions that are relatively close to the clinician, and the terms "distal" and "anterior" refer to portions that are relatively far from the clinician. "left" and "right" are referenced to the position of the surgical instrument shown in FIG. 1, e.g., with the end effector on the "left" and the cannula on the "right". The terms "upper" and "lower" are used with reference to the relative positions of the staple cartridge seat and the staple cartridge seat of the end effector, specifically, the staple cartridge seat is "upper" and the staple cartridge seat is "lower". It will be appreciated that the orientations of "proximal", "rear", "distal", "anterior", "left", "right", "up" and "down" are defined for convenience of description, however, surgical instruments may be used in many orientations and positions and thus these terms are not intended to be limiting and absolute. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. The connection in the present invention includes electrical connection and mechanical connection.

Referring to fig. 1-4, the present invention provides a surgical instrument, specifically a powered stapler 100, including a handle assembly 10, a shaft assembly 20 extending from the handle assembly 10, and an end effector 30 disposed at one end of the shaft assembly 20. The stapler 100 further includes a transmission mechanism including a first transmission mechanism and a second transmission mechanism, the transmission mechanism is located at the operation component 10 and the shaft component 20, and the specific positional relationship and functions are as follows.

The operating assembly 10 includes a power module, a motor 70 and the first drive mechanism described above. The power module is composed of a plurality of electrically connected batteries, and supplies electric power to 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 component 20 comprises a mandrel 21 and a sleeve 22 sleeved on the mandrel 21, and the shaft component 20 belongs to a second transmission mechanism, and the first transmission mechanism drives the second transmission mechanism to move.

End effector 30 includes a jaw assembly and a cartridge assembly (not numbered). The jaw assembly includes a cartridge seat 31 and a staple abutment 32 pivotally attached to the cartridge seat 31, the cartridge seat 31 being adapted to operably support the cartridge assembly therein, the staple abutment 32 being selectively movable between an open position and a closed position to cooperate with the cartridge seat 31 and the cartridge assembly to clamp or unclamp tissue. One end of the sleeve 22 is connected to the anvil 32 of the end effector 30 and the other end is connected to a first transmission mechanism that drives the sleeve 22 back and forth, with the back movement of the sleeve 22 pivoting the anvil 32 upward to open the end effector 30, i.e., open the jaw assembly of the end effector 30, and the forward movement of the sleeve 21 pivoting the anvil 32 downward to close the end effector 30, i.e., close the jaw assembly of the end effector 30.

The stapler further comprises a cutting knife assembly 40 comprising a knife pusher 42 and a non-detachable fixed to a cutting knife 41. The mandrel 21 has two ends, one end connected to the first transmission mechanism and the other end located within the sleeve 22. A part of the push-knife element 42 is located inside the sleeve 22 and connected to the other end of the mandrel 21, and another part of the push-knife element 42 is connected to the cutting blade 41. During cutting and stapling, the cutting blade 41 is positioned in the space formed between the cartridge seat 31 and the anvil seat 32 of the jaw assembly. The first transmission mechanism can drive the mandrel 21 to move forwards and backwards, when the cartridge component is installed, the mandrel 21 moves forwards to enable the cutting knife component 40 to move forwards to cut the tissue and push staples of the cartridge component out to suture the tissue, and the backward movement of the mandrel 21 enables the cutting knife component 40 to move backwards to return to the initial position. Thus, the stapler provides for the transmission of power from motor 80 to the jaw assembly and cutter assembly 40 through the gearing mechanism described above.

Therefore, the motor 80 clamps the tissue by closing the jaw assembly through the transmission mechanism, then the motor 80 drives the cutter assembly 40 to advance through the transmission mechanism to cut and anastomose the tissue, then the motor 80 drives the cutter assembly 40 to retreat through the transmission mechanism, and finally the motor 80 drives the jaw assembly to open through the transmission mechanism to loosen the tissue, thereby realizing the cutting and anastomosing functions of the anastomat.

The operating assembly 10 further comprises a housing comprising, in a positional relationship, a handle housing and a head housing connected to one another, the head housing receiving at least part of the transmission mechanism, the handle housing being graspable 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 cavity of the handle housing houses the motor 80, the head cavity of the head housing houses the battery module, the handle cavity is connected to the head cavity, and the first transmission mechanism is located within 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 power for operation. The control module 90 is a circuit board assembly 90' contained 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, transmits a signal to the control unit when triggered, 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 operating state of the motor. 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 can be used by 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 on-off frequency of the switch unit determines the power supply or power failure of the power module to the motor 80, so that the running state of the motor, namely the rotating speed and the direction of the motor, is determined. In this embodiment, the switch unit includes 4 Mos switches forming an H bridge, the on/off of the Mos switches of the H bridge determines whether the power module supplies power to or cuts off power to the motor 80, and the switch driving unit is an Mos driving chip. And the design of the H bridge enables the control unit to control the H bridge to realize the forward rotation or the 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 performed in the prior art, and are not described in detail. In this embodiment, the control unit is a microcontroller chip.

The motor controlled triggers of trigger 60 include a jaw open switch 61, a jaw close switch 62 and a firing switch 63 that are manually activated by user operation to control motor start and stop. The jaw opening switch 61, the jaw closing switch 62 and the firing switch 63 are respectively provided with a key arranged on the shell, particularly the handle shell, the user operating the key comprises pressing the key to trigger the corresponding switch, the switch inputs an electric 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 respectively a first key 71, a second key 72 and a third key 73. In this embodiment, the jaw opening switch 61, the jaw closing switch 62 and the firing switch 63 are normally open switches, and the control module 90 controls the running state, i.e., starting or stopping, of the motor according to the trigger states of the jaw opening switch 61, the jaw closing switch 62 and the firing switch 63, respectively, so as to execute the corresponding action of the stapler. The trigger state includes triggered and not triggered. When the normally open switch is triggered, the normally open switch is switched to a closed state to generate a low potential signal, the control unit of the control module 90 obtains the low potential signal to control the motor to start, the low potential signal is continuously obtained to indicate that the switch is continuously triggered, when the normally open switch is not triggered, the normally open switch generates a high level, and the control unit of the control module 90 obtains the high level signal to control the motor to stop.

Therefore, the user operates the second button 72 to trigger the jaw closing switch 62, the control unit controls the motor 80 to operate, drives the jaw assembly to perform the jaw closing action, stops operating the second button 72, does not trigger the jaw closing switch 62, and controls the motor 80 to stop; a user operates the first button 71 to trigger the jaw opening switch 61, the control unit controls the motor to operate, the jaw assembly is driven to execute jaw opening action, the first button 71 is stopped to operate, the jaw opening switch 61 is not triggered, and the control unit controls the motor to stop; the user operates the third button 73 to trigger the trigger switch 63, the control unit controls the motor to operate to drive the cutter assembly to execute the feeding action, in the feeding process, the third button 73 is stopped to operate, the trigger switch 63 is not triggered, and the control unit controls the motor to stop.

The motor control trigger of trigger 60 also 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 stroke switch 65, the second stroke switch 66, the third stroke switch 67 and the fourth stroke switch 68 are arranged in the head cavity of the housing, in particular the head housing, and cannot be directly triggered by the user's hand.

The first and second travel switches 65, 66 are used to detect whether the jaw assembly is open or closed in place and to stop the motor from pivoting the anvil 32 via the control module 90. When the nail abutting seat 32 is in the closed position, the distance between the far end of the nail abutting seat 32 and the far end of the nail bin seat 31 in the up-down direction is minimum, the two clamp tissues, and at the moment, the jaw assembly is in a jaw closed state; the jaw opening action is executed under the jaw closing state, the nail abutting seat 32 is separated from the closing position to enter the opening position, and the jaw assembly enters the jaw opening state from the jaw closing state; due to the structural limitation, the staple abutting seat cannot be opened without limitation, the opening position comprises an opening bottom position, the distance between the far end of the staple abutting seat 32 and the far end of the nail bin seat 31 in the vertical direction is the largest, the staple abutting seat and the nail bin seat completely loosen tissues, the jaw assembly is in a jaw opening bottom state, and the jaw opening state comprises a jaw opening bottom state. The first transmission mechanism comprises a matching part, and the matching part comprises a first lug and a second lug. When the first transmission mechanism drives the sleeve 22 to move forward to drive the nail abutting seat 32 to close and rotate, the nail abutting seat 32 reaches a closed position, the first bump 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 closed state; in the process that the first transmission mechanism drives the nail abutting seat 32 to open and rotate by driving the sleeve 22 to move backwards, the second bump triggers the second travel switch 66, and the control module 90 receives a signal sent by the second travel switch 66 and instructs the motor to stop rotating, so that the jaw assembly is opened in place and is in a state that the jaws are opened to the bottom. It should be noted that the first and second projections could be replaced by one projection that triggers the first travel switch 65 during forward movement and the second travel switch 66 during backward movement. At this time, the fitting portion includes the one projection.

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 has bottomed out or bottomed out and to 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 driving of the transmission mechanism, moves with a fixed length of moving stroke and moves forwards or backwards in the moving stroke according to the working mode of the surgical instrument, the farthest end of the moving stroke is the front stop point of the forward movement, namely the position of finishing cutting, and the nearest end is the starting point of the forward movement and the back stop point of the backward movement.

As mentioned above, in the cutting knife assembly 40, the cutting knife and the knife pushing member are inseparable, the knife pushing member pushes the cutting knife to advance and trigger, the knife pushing member is driven to reciprocate between the initial position and the trigger bottom position, and after the knife pushing member drives the cutting knife to move from the initial position to the trigger bottom position, that is, after the trigger is completed, the transmission device drives the knife pushing member to reset to the initial position, the cutting knife is driven to return to the initial position in the lump. In another alternative embodiment, the cutting blade and the pushing blade are separately arranged. After the push knife component drives the cutting knife to move from the initial position to the bottom position, namely after the triggering is completed, when the push knife component is driven to reset to the initial position by taking, the cutting knife does not move along with the movement of the push knife component, but remains in the bottom position after the triggering.

Thus, in some alternative embodiments of the present invention, the cutter assembly 40 is positioned relative to the pusher-knife because the cutter may not return to the initial position with the pusher-knife, i.e., not all components of the cutter assembly 40 may reciprocate between the initial position and the fired-to-bottom position.

In various embodiments of the present invention, the cutting blade is located in front of the pushing blade member, and the front end of the pushing blade member or a portion contacting with the cutting blade may be used as a reference portion. When the reference position is at the initial position or the bottom-fired position, the pusher member is considered to be at the corresponding position.

In this embodiment, the initial position is a position where the cutting blade does not contact the tissue, and may be the above-mentioned back dead center. The position where the cutter moves to the bottom is the position after the cutter has moved the full stroke of the nail bin seat, namely the position where the cutter is located after the trigger action is finished, and the position can be the front dead center.

Before firing, the cutting knife assembly 40 is in the initial position; the cutting knife assembly 40 moves from the initial position to the bottom firing position to cut the tissue and stops at the middle point of the moving stroke, or finally reaches the bottom firing position; the cutter is withdrawn, and the cutter assembly moves backwards from the middle point or the bottom firing position until the initial position is returned. Defining that the cutter assembly is in a cutter initial state when the cutter assembly 40 is located at an initial position, and the state that the cutter assembly 40 leaves the initial position is a cutter discharging state, including being located at a middle point or being fired to a bottom position; when the cutter assembly is positioned at the bottom firing position, the cutter assembly is in a cutter-out and bottom-reaching state; according to whether the triggering occurs or not, the initial state of the cutting knife is divided into two different states, namely a non-cutting state and a cutting withdrawal completion state, if the triggering does not occur and the cutting knife is located at the initial position, the cutting knife is in the non-cutting state, and if the triggering occurs and the cutting knife is located at the initial position, the cutting knife is in the cutting withdrawal completion state.

The matching part of the first transmission mechanism further comprises a third lug and a fourth lug. When the first transmission mechanism drives the cutting knife assembly 40 to move forwards through the mandrel 21 and reach a front stop point, the third projection triggers the third stroke switch 67, the control module 90 receives a signal sent by the third stroke switch 67 and instructs the motor to stop rotating, and at the moment, the cutting knife assembly 40 cuts to the bottom; in the process that the first transmission mechanism drives the cutter assembly 40 to move backwards through the mandrel 31, when the fourth transmission mechanism reaches a rear dead center, the fourth bump 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 completely withdrawn, namely the cutter withdrawal is completed. It should be noted that the third bump and the fourth bump may be replaced by one bump.

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

Further, when the user triggers the trigger switch 63 and keeps triggering, the motor 80 rotates forward to perform the feeding action until the third travel switch 67 is triggered, the control unit controls the motor to stop, at this time, the user releases the third button 73 and does not trigger the trigger switch 63 any more, the control unit automatically controls the motor 80 to rotate backward to perform the retracting action, and the cutting knife assembly 40 moves backward until the fourth travel switch 68 is triggered to stop. Thereby saving the operating time of the user by releasing the third button 61 to automatically retract the knife once the cutting knife assembly 40 is fired.

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

The above is an embodiment that uses the mechanical means of four travel switches in cooperation with a protrusion to calibrate the jaw open/closed position and the firing/retracting position. However, identification of jaw open/close, and firing/retracting is not limited to the embodiment described above in which the travel switch is in mechanical contact with the protrusion. In fact, the opening and closing of the jaws, as well as the firing and retracting of the cutting knife assembly 40, are accomplished by the motor 80 through the drive sleeve 22 and the spindle 21, respectively. Thus, in other alternative embodiments, it is equally possible to identify whether the jaws are open/closed in position and whether the cutting blade assembly 40 is cocked/deactuated in position by detecting the axial displacement of the sleeve 22 and mandrel 21, or the number of revolutions of the motor 80.

Specifically, 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 switches the jaw assembly from an open state to a closed state. Conversely, the motor 80 drives the sleeve 82 rearward, which switches the jaw assembly from the closed position to the open position. During the switching of the jaw assembly from open to closed to open, or vice versa, the sleeve 82 moves axially a certain distance, and the number of turns the motor 80 drives the sleeve 82 to move axially a certain distance is also 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 to the proper position, thereby reflecting whether the jaw assembly is bottomed out or bottomed out.

The above-mentioned displacement sensor or proximity sensor and the like detecting elements can be replaced by other forms of structures, such as 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 cutter assembly is in an initial position, the cutter assembly is in a bottom cutting position, the jaw assembly is in an open position, and the jaw assembly is in a bottom closed 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 a first component and a second component through the clutch mechanism to realize action logic relation, 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 referred to in the applicant's prior application CN202010365525.0 and is not described herein again. Or, the number of the motors is two, the first transmission mechanism includes two gears, each gear is driven by a different motor, the first assembly includes a first rack, the second assembly includes a second rack, the first rack and the second rack are respectively engaged with different gears, and the action logic relationship is realized by starting and stopping different motors.

Further, the housing is provided with a user manually depressed retracting button 79 mechanically connected to the third stroke switch 67. When the trigger switch is stopped to trigger during the trigger action, the motor stops rotating forwards, and the cutter assembly is not triggered to the bottom and is at the middle point, the user can select the forced retracting mode, namely, the forced retracting button 79 is pressed down, the forced retracting button triggers the third stroke switch 67, at the moment, the control unit receives a low level signal of the switch to start the motor to rotate backwards until the fourth stroke switch 69 is triggered to stop rotating backwards, and the forced one-step retracting is realized to the bottom.

It should be noted that, in an execution cycle, the stapler is required to sequentially execute the jaw closing motion, the firing motion, the retracting motion, and the jaw opening motion to complete the whole working process, and preferably, when the same motor is used to power the first component and the second component of the first transmission mechanism, the control module 90 sequentially drives the motor to rotate forward, rotate backward, and rotate backward to sequentially drive the first component, the second component, and the first component, so as to finally implement the jaw closing motion, the firing motion, the retracting motion, and the jaw opening motion.

The trigger 60 also includes a safety switch 69 that is manually activated by user operation and electrically connected to the control module 90. The safety switch 69 has a button provided on the housing, in particular on the handle housing, as a fourth button 74, the user-operated button comprising a push button which triggers a 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 with a preset time, for example, 15s, and the timing unit starts to time, and when the time reaches the preset time, the timing unit is closed, and the time is cleared. The timing unit can be a circuit module independent from the microcontroller or a timing unit carried by the microcontroller. The anastomat further comprises a timing indication module, is electrically connected to the control unit and has two functions: the first function is: the timing unit is used for indicating that the timing unit reaches the preset time and informing a user of the state; the second function is: the timing unit is configured to instruct the timing unit to count the time length of the timing operation in real time, so that the user can know the elapsed time length, and when the timing unit is started, the control module 90 starts the timing instruction module to implement the second function. For example, the timing unit counts for 10s, the timing indication module indicates that 10s has elapsed.

When the jaw assembly is in the jaw opening state, the control module 90 controls the safety switch 69 to be in the failure state and controls the trigger switch 63 to be in the failure state; when the jaw closing action is performed, the jaw assembly is changed from the jaw opening state to the jaw closing state, the control module 90 controls the safety switch 69 to be changed from the failure state to the effective state, and the jaw closing switch 62 to be changed from the effective state to the failure state; when a user triggers the safety switch 69 in an effective state for the first time, the timing unit starts and times, and the timing indication module starts at the same time; when the timing unit reaches the preset time, 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 active state to the inactive state and the trigger switch 63 to be switched from the inactive state to the active state. The trigger switch 63 remains disabled when the safety switch 69 is enabled, i.e., even if the trigger switch 63 is operated by the user, the trigger switch 63 is disabled and the stapler will not trigger.

Therefore, the safety switch 63, the timing unit and the timing indication module form a squeezing holding mechanism which is convenient for a user to know that the target tissue is fully squeezed, the squeezing holding mechanism can enable the jaw assembly to squeeze the target tissue for a certain duration, tissue fluid is more fully removed, namely the squeezing holding mechanism can not allow the cutting knife assembly to move forwards within a certain duration and keeps the jaw assembly closed so as to improve the squeezing effect of the jaw assembly on the tissue. In the above-mentioned scheme, the combination of above-mentioned timing unit and timing instruction module, on the one hand, ensures the time of squeezing of capacity, guarantees to squeeze the effect, and on the other hand, the user of being convenient for knows and has reached preset time of squeezing, masters the operation rhythm, promotes user experience. In the above scheme, effective state and the failure state of the three switches of the jaw closing switch 62, the safety switch 69 and the trigger switch 63 are switched, firstly, three actions of jaw closing, squeezing timing and triggering have fixed sequence, the three actions of jaw closing, squeezing timing and triggering must be carried out firstly, the two actions before triggering are absent, the sequence cannot be changed, secondly, only one switch is in effective state between the three switches at the same moment, and the three actions cannot be influenced mutually. In the above solution, the safety switch 69 facilitates the doctor to autonomously control when to start the timing of the press holding mechanism: in the use of the anastomat, the tissue clamped by one-time closing of the jaw assembly may not be in place, for example, the tissue may be askew clamped, clamped more or clamped less, and need to be adjusted, if the tissue is not fully prepared and the squeezing timing is started, the actual squeezing time is insufficient although the timing of the timing indication module is ended, the doctor cannot accurately know the actual squeezing time, the tissue fluid is not fully discharged to start the percussion, and the percussion effect is poor, and in the above scheme, the safety switch 69 is adopted to start the squeezing timing, on one hand, the doctor has sufficient time to observe and adjust the position where the jaw assembly clamps the tissue before the timing is started until the optimal clamping position of the jaw assembly is reached, on the other hand, the doctor actively triggers the safety switch 69 to time the squeezing time to ensure that the preset time is fully squeezed to the tissue at the optimal clamping position, ensuring the effect of subsequent percussion.

When the squeeze hold mechanism is closed, one event is the completion of the squeeze timing motion and the stapler can execute a firing motion, and the other event is the interruption of the squeeze timing motion and the stapler is retracted to the jaw motion and cannot fire. Specifically, the press holding mechanism is closed in the following three ways:

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

The second mode is as follows: if the doctor thinks that the tissue to be cut and sutured is suitable for direct cutting and suturing or squeezing in a short time, squeezing for a certain time is not needed, in order to save time, a second mode can be adopted, namely the safety switch 69 is in an effective state, the safety switch 69 is triggered for the first time, the safety switch 69 is triggered again when the timing unit times and the preset time is not reached, the control module 90 closes the timing unit, controls the timing indication module to indicate that the preset time is reached, controls the safety switch 69 to be converted into a failure state from the effective state, and controls the trigger switch 63 to be converted into the effective state from the failure state. 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 indication module is to indicate that the squeezing timing action is completed to a user and trigger the squeezing timing action. In the scheme, the user unwinds to wait and actively closes the squeezing 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 the user to trigger at any time and improve the user experience.

The third mode is as follows: when squeezing timing action is carried out, a doctor possibly needs to readjust the jaw assembly to clamp tissues, and does not need to enter firing action, a third mode can be adopted at the moment, namely the safety switch 69 is in an effective state, the safety switch 69 is triggered for the first time, the jaw opening switch is triggered during timing of the timing unit and when the preset time is not reached, the timing unit and the timing indication module are closed by the control module 90, the jaw assembly is controlled to execute the jaw opening action, the safety switch 69 is controlled to be switched from an effective state to an ineffective state, and the jaw closing switch is controlled to be switched from the ineffective state to the effective state. I.e. the press timing is interrupted. In the squeezing timing action, the opening switch of the nip is kept in an effective state all the time. According to the scheme, the squeezing holding mechanism is closed actively by a user, the squeezing timing action can be returned to the jaw opening state at any time and the jaw closing action is executed again, and the new 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, so as to achieve the above-mentioned purpose.

In the first and second modes, when the squeezing timing action is finished, the timing indication module keeps indicating for a preset time all the time to inform that the anastomat is squeezed and a user can trigger at any time. Further, there may be two action options: the first motion is selected to be conventional firing, the user activates the firing switch 63, the stapler performs a feeding motion, and the second motion is selected to turn off the timing indicator module and retract in the execution sequence to perform a jaw motion, as follows: when the trigger switch 63 is in an active state and the cutting knife assembly 40 is in the cutting knife 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, controls the jaw assembly to perform a jaw opening action, and controls the jaw closing switch 62 to change from a failure state to an active state. When the squeezing timing is completed in the first and second ways, the user can fire for the first time, and at this time, the scheme (i.e. the second motion selection) provides the user with the option of still returning to the jaw closing motion to perform the new clamping position adjustment. The effect of the design is the same as that of the third mode, so that a doctor can consider whether to excite or not before the percussion, the operability of the anastomat is improved, and the user experience is improved.

Above, the operation of the press holding mechanism is completed by: pressing the fourth key 74 and releasing immediately, and starting the timing unit and the timing indication module to work until the work is finished, and reaching the preset time; the operation of the press holding mechanism is terminated including: pressing the fourth key 74 and releasing instantly, and pressing the fourth key 74 again within a preset time and releasing instantly; the operation of the press holding mechanism being interrupted includes: the first key 71 is pressed. The preset time, namely the pressing duration, can also be set to 10 seconds, 20 seconds, 30 seconds, 40 seconds, 50 seconds and 60 seconds, the pressing effect of 10 seconds is poor, but it is still acceptable, in the interval of 15 seconds to 60 seconds, the longer the time, the better the pressing effect, but the pressing effect is not linearly improved along with the time extension, but more than 15 seconds, the user can feel that the waiting time is too long, and the use experience of the user is affected. The press hold time was set to 15 seconds, which is the balance between the waiting time and the press effect.

After the squeezing timing action is completed, the user enters a triggering action, operates the triggering switch 63 to execute a feeding action and then execute a retracting action, and when the cutter assembly 40 is changed from a cutter-out state to a cutter-retracting completion state, the control module 90 controls the timing indication module to be closed and can enter a jaw opening action. That is to say, during the triggering action and the retracting action, the timing indication module also keeps an indication state all the time, namely, indicates that the preset time is reached, and indicates that the squeezing and the keeping are finished, the timing indication module well reminds a doctor that the doctor is currently in a cutting knife component preparation cutting state or cutting state, and the cutting knife is about to act on human tissues or is applied to the human tissues and needs to be operated carefully; when the cutter is completely withdrawn, the timing indication module is closed at the same time, the closing action plays a role in prompting the user to withdraw the cutter completely, and the cutter 42 enters a safe position and cannot act on human tissues. Conversely, if the timing indication module is turned off when the squeezing timing action is completed and the trigger switch 63 is triggered for the first time, the above beneficial effects cannot be achieved, and the triggering action, the retracting action and the jaw opening action have no boundary feeling, so that the user experience is poor.

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 can be directly observed by a user, and includes indication lamps, for example, the indication lamps include a plurality of LED lamps, and the plurality of LED lamps are sequentially turned on, a first LED lamp is turned on to indicate the start of timing, and a last LED lamp is turned on to indicate the end of timing. The number, the arrangement form, the color and the lighting time interval of the LED lamps can be set according to the requirement, for example, 4 LED lamps can be set and linearly arranged on the handle assembly, the control module lights 1 LED lamp every 5 seconds and continuously keeps the lighting state, and the real-time lighting number is the real-time length for indicating the timing operation of the timing unit. After the timing is finished, all the LED lamps are kept in the lighting state, namely the timing unit is indicated to reach the preset time, and all the 4 LEDs are lighted for 15 seconds. Other numbers of LED lights, e.g., 5, 6, etc., may also be selected. The lighting time interval may be set to 1 second, 4 seconds, 10 seconds, or the like. In other embodiments, a mode that a plurality of LEDs are sequentially turned off is adopted, all the LED lamps are turned on to indicate starting timing, the timing is turned off until only the last LED lamp is turned on and indicates ending timing, the last LED is kept on before the triggering action is finished, and when the triggering action is finished, the last LED lamp is turned off, namely, the timing indication module is turned off. In the manner of the timing display module, the change of the lighting or extinguishing state of the LED lamps indicates that the preset time is reached, the lighting state changes, that is, the number of the lighting is gradually increased and increased to the preset number, that is, the preset time is reached, and the extinguishing state changes, that is, the number of the extinguishing is gradually increased and increased to another preset number, that is, the preset time is reached.

The timing indication module further comprises an alarm, and when timing is finished, a sound is made to indicate that timing is finished. The alarm is a buzzer, and the duration of the sound emitted by the buzzer can be set according to the requirement.

The failure state of the switch means that the switch is triggered but the anastomat does not execute actions, and the effective state means that the switch is triggered and the anastomat executes corresponding actions. In this embodiment, the switch is triggered in a failure state, and the switch 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 operate or control the timing unit or control the timing display module 110 according to the signal. In contrast, if the switch is triggered in the active state, the control module 90 will perform corresponding control according to the signal. The first stroke switch 65, the second stroke switch 66, the third stroke switch 67 and the fourth stroke switch 68 are always in an active state by default after the stapler is powered on, 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, the jaw opening switch 61 is in an inactive state only in the feeding action and the retracting action, and is in an active state at the rest time.

As shown in fig. 7, the above-described first embodiment of the present invention also provides a squeezing time acquisition method of a surgical instrument. The surgical instrument includes a safety switch 69, a firing switch 63, and a timing unit, the firing switch 63 being in a disabled state when the safety switch 69 is in an enabled state, the user operating the safety switch 69 in the enabled state to unlock the firing switch in the enabled state. In this embodiment, the time acquisition method for a surgical instrument includes:

step S10: when the safety switch 69 in an effective state is triggered for the first time, the timing unit is started to start timing;

step S20: triggering the trigger switch 63 in an effective state for the first time, and turning off the timing unit;

step S30: acquiring the time length timed by the timing unit, wherein the time length is squeezing time and storing the squeezing time; and resetting the timing unit.

The squeezing time obtaining method further comprises the following steps: the pressing time obtaining method is repeatedly performed. Repeating the execution N times, N squeeze times are stored, and each squeeze time is stored in sequence, for example, two adjacent squeeze times are spaced by 2 bytes.

As can be appreciated from the foregoing description of the present embodiment of the powered stapler 100, the safety switch 69 is only activated when the jaw assembly is moved to the closed position, and is only activated when the firing switch 63 is locked in the deactivated position. The moment of first triggering the safety switch 69 is used as the starting point for obtaining the squeezing time, the obtained squeezing time is accurate, and the first triggering safety 63 is the starting point of the squeezing timing which is actively selected by the user.

The end node of the squeezing state provided by the electric stapler 100 according to the embodiment described above to the user is the timing unit active or passive closing, but this does not reflect the actual squeezing time well, and during the period from the time when the timing unit is closed to the time when the user operates the trigger switch 63 for the first time, and the tissue is still being squeezed continuously by the jaw assembly, when the trigger action is started for the first time, the tissue clamped in the jaw assembly is cut and anastomosed by the jaw assembly, and the state of discharging the tissue fluid is no longer the state of triggering the trigger switch 63 in the active state for the first time, which is the end point of the squeezing time, and the obtained squeezing time is accurate, which means that the real squeezing state is ended. The trigger switch 63 activated for the first time includes: when a user operates the trigger switch 63, the control module 90 receives a trigger signal sent by the trigger switch 63 for the first time, and controls the cutting knife assembly to execute a trigger action according to the trigger signal, the cutting knife assembly leaves an initial position and is converted into a knife-out state from the cutting knife initial state, and the fourth bump is separated from the trigger fourth travel switch 68, so that the control module 90 cannot receive a signal sent by the fourth travel switch 68.

The timing unit may include a counter and a crystal oscillator, and the timing mode is a conventional technical means in the electrical field and is not described in detail.

And storing the obtained squeezing time by adopting a nonvolatile memory, and clearing the timing unit. The control module comprises a nonvolatile memory, and a user stores the obtained squeezing time and is independent of the control unit. In other embodiments, the non-volatile memory may also be a memory that is self-contained within the control unit, i.e., the microcontroller. The timing unit zero clearing action is to obtain a timing unit with initialization for the next time of squeezing time, otherwise, the next time of opening is continued to be timed for the last closing time, and the timing unit is not cleared, so that the timing unit is easy to overflow and loses accuracy.

Further, step S11 is included between step S10 and step S20: when the safety switch is in an effective state and triggers the jaw opening switch, the safety switch is switched from the effective state to the failure state, the trigger switch keeps the failure state, the timing unit is closed, and the timing unit is cleared. When waiting for the period that the user triggers the safety switch for the first time, if the user selects to open the nip, the squeezing which is possibly generated at this time is abandoned, the control module clears the timing unit, namely the operation of obtaining the squeezing time at this time is abandoned, and the clearing of the timing unit also is the initialization preparation for obtaining the squeezing time at the next time. If the time is not cleared, the time is continuously counted, and the time which does not belong to the squeezing state is also counted. After the step S11 is executed, the process cannot proceed to the step S20, and the process only proceeds to the step S10, i.e., the process waits for the fuse switch to be turned to the enabled state again, and the next "first triggering of the fuse switch in the enabled state" by the user is waited.

Further, step S12 is included between step S10 and step S20: the user operates the safety switch in the effective state to unlock the trigger switch to enable the trigger switch to be in the effective state, the jaw opening switch is triggered, the safety switch keeps in the failure state, the trigger switch is switched from the effective state to the failure state, the timing unit is closed, the timing unit is reset, and the jaw assembly is enabled to execute the jaw opening action. When the safety switch 69 is triggered and the user waits for the first triggering of the trigger switch 63, if the user selects to open the nip, the squeezing which may occur this time is abandoned, the control module clears the timing unit, that is, the operation of obtaining squeezing time this time is abandoned, and the clearing of the timing unit also makes initial preparation for obtaining squeezing time next time. If the time is not cleared, the time is continuously counted, and the time which does not belong to the squeezing state is also counted. After the step S12 is executed, the process cannot proceed to the step S20, and the process only proceeds to the step S10, i.e., the process waits for the fuse switch to be turned to the enabled state again, and the next "first triggering of the fuse switch in the enabled state" by the user is waited.

According to the electric stapler of the present embodiment, it is inevitable that S20 cannot be executed between S10 and S20 by "the user operates the safety switch 69 in the active state to unlock the trigger switch to be in the active state", and therefore, the electric stapler 100 according to the present embodiment includes the timing unit as described above, and further, the present pressing time acquisition method further includes: the step that the user operates the safety switch in the effective state to unlock the trigger switch so that the trigger switch is in the effective state comprises the following steps: when the safety switch in the effective state is triggered for the first time, the timing unit is started, and when the preset time is reached, the safety switch is converted from the effective state to the invalid state, and the trigger switch is converted from the invalid state to the effective state. Further, when the preset time is not reached, the safety switch is triggered again, the safety switch is switched from the effective state to the invalid state, and the trigger switch is switched from the invalid state to the effective state. The two modes are two modes for unlocking the trigger switch according to the safety switch, and the principle and the function of the unlocking mode are the same as those described above and are not described in detail.

Further, the step S10 is preceded by the following steps: and triggering the jaw closing switch to enable the jaw assembly to execute jaw closing action, and when the jaw assembly is converted from an open state to a closed state, converting the safety switch from a failure state to an effective state. A complete cycle can be performed according to this step.

The surgical instrument is a powered stapler.

In other embodiments, electric stapler 100 eliminates the squeeze timing function of the safety switch based on this embodiment, and employs a trigger switch 63 that is immediately unlocked to be active when safety switch 69 is first activated. Therefore, in the squeezing time obtaining method, the step of operating the safety switch in the effective state by the user to unlock the trigger switch to enable the trigger switch to be in the effective state includes: when the safety switch in the effective state is triggered for the first time, the safety switch is switched from the effective state to the invalid state, the trigger switch is switched from the invalid state to the effective state, and the jaw assembly executes the jaw opening action.

As shown in fig. 8, the above-described first embodiment of the present invention further provides a squeezing time acquisition method of a surgical instrument. The surgical instrument includes a jaw assembly, a cutter assembly 40, a firing switch 63 that is triggered to cause the surgical instrument to perform a firing motion, a jaw closure switch 62, and a timing unit. In this embodiment, the time acquisition method for a surgical instrument includes:

step S10: and triggering the jaw closing switch to enable the jaw assembly to execute jaw closing action, and starting the timing unit to start timing when the jaw assembly is converted from the open state to the closed state.

Step S20: when the trigger switch 63 is triggered to enable the cutter assembly 40 to start executing the trigger action, the timing unit is closed;

step S30: and acquiring the time length timed by the timing unit, wherein the time length is squeezing time, storing the squeezing time, and resetting the timing unit.

According to the electric stapler 100 of the embodiment, when the jaw assembly is changed from the open state to the closed state, the staple cartridge seat and the staple abutting seat of the jaw assembly are in the shortest distance, the squeezing process is started, and the moment when the jaw assembly is changed from the open state to the closed state is used as the starting point for obtaining the squeezing time, so that the squeezing time is obtained accurately.

The end node of the squeezing state provided by the electric stapler 100 according to the above embodiment to the user is the timing unit active or passive closing, but this does not reflect the actual squeezing time well, and during the period from the time when the timing unit is closed to the time when the user operates the trigger switch 63 for the first time, the jaw assembly still continues to squeeze the tissue, and when the trigger action is started to be executed for the first time, the jaw assembly cuts and anastomoses the tissue clamped therein, and the tissue is no longer in the state of discharging the tissue fluid, that is, the time when the trigger switch 63 in the active state is triggered for the first time is taken as the end point of the squeezing time, and the obtained squeezing time is accurate, which means that the real squeezing state is ended. The trigger switch 63 activated for the first time includes: when a user operates the trigger switch 63, the control module 90 receives a trigger signal sent by the trigger switch 63 for the first time, and controls the cutting knife assembly to execute a trigger action according to the trigger signal, the cutting knife assembly leaves the initial position, the initial state of the cutting knife is converted into a knife-out state, and the fourth bump is separated from the trigger fourth travel switch 68, so that the control module 90 cannot receive a signal sent by the fourth travel switch 68.

Further, step S11 is included between the step S10 and the step S20, wherein the timing unit is turned off when the jaw opening switch is triggered, and the timing unit is cleared. At the same time, the trigger switch will enter a disabled state. During the period from the moment when the jaw assembly is turned to the closed state to the moment before the trigger switch 63 is triggered for the first time, no matter the electric anastomat 100 of the embodiment has the safety switch or does not have the safety switch, once the user selects to open the jaws, the fact that squeezing possibly occurs at this time is abandoned is meant, the control module clears the timing unit, namely the operation of obtaining squeezing time at this time is abandoned, and the clearing of the timing unit is also used for initializing to obtain the next squeezing time. If the time is not cleared, the time is continuously counted, and the time which does not belong to the squeezing state is also counted.

Further, as the above-mentioned electric stapler 100, the surgical instrument further includes a safety switch, the firing switch is in a failure state when the safety switch is in an effective state, and the user operates the safety switch in the effective state to unlock the firing switch to be in the effective state; the step S10 further includes: the safety switch is configured to transition from a disabled condition to an enabled condition when the jaw assembly transitions from the open condition to the closed condition.

According to the electric stapler of the present embodiment, between S10 and S20, it is inevitable that the user operates the safety switch 69 in the active state to unlock the trigger switch to make it in the active state, otherwise S20 cannot be performed, and further, the safety switch squeeze timer function as described above, that is, with the above-mentioned timer unit, the step of the user operating the safety switch in the active state to unlock the trigger switch to make it in the active state includes: when the safety switch is triggered for the first time, the timing unit is started, when the preset time is reached, the safety switch is switched from the effective state to the invalid state, and the trigger switch is switched from the invalid state to the effective state. Further, when the preset time is not reached, the safety switch is triggered again, the safety switch is switched from the effective state to the ineffective state, and the trigger switch is switched from the ineffective state to the effective state. The two modes are two modes for unlocking the trigger switch according to the safety switch, and the principle and the function of the unlocking mode are the same as those described above and are not described in detail.

The surgical instrument is a powered stapler.

In other embodiments, the electric stapler 100 cancels the squeezing timing function of the safety switch, and unlocks the trigger switch 63 immediately when the safety switch 69 is triggered for the first time, so that the squeezing time obtaining method is adopted in which the step of the user operating the safety switch in the active state to unlock the trigger switch to enable the trigger switch to be in the active state includes: when the safety switch is triggered for the first time, the safety switch is switched from an effective state to a failure state, the trigger switch is switched from the failure state to the effective state, and the jaw assembly is enabled to execute jaw opening action.

In other embodiments, powered stapler 100 eliminates the safety switch and employs an immediate or delayed release of firing switch 63 when the jaw assembly is turned to the closed position. Therefore, in the pressing time obtaining method, the step S10 further includes: the firing switch may be configured to transition from the deactivated state to the activated state immediately or with a delay as the jaw assembly transitions from the open state to the closed state.

The present invention also provides another real-time embodiment in which a surgical instrument is provided comprising: a memory, a processor, and a program stored on the memory and executable on the processor, the processor implementing either of the two squeezing time acquisition methods set forth in the first embodiment described above when executing the program.

Preferably, the surgical instrument is a powered stapler.

The implementation of the above-mentioned method for obtaining the squeezing time can be accomplished by a program through instruction-dependent hardware, that is, the program is a set of codes for implementing the above-mentioned method for obtaining the squeezing time. The program may be stored in a readable storage medium. By way of illustration, and not limitation, the readable storage medium can be a Memory such as a FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface Memory, optical disk, or CD-ROM.

In summary, the two implementation methods of the first embodiment of the present invention accurately obtain the squeezing time according with the actual working condition, thereby facilitating the analysis and evaluation after the operation.

Second embodiment

Different from the first embodiment, the timing indication module is a timing sound module which is arranged in the housing and can be heard by a user, and the functions and the control mode are the same as those of the timing display module, so that the description is omitted. The difference is that the timing sound module indicates the real-time length of the timing unit by different sounds, such as duration, volume, tone, etc., for example, different tones of "duo", "lai", "miaow", etc. are used to indicate the started 0s, 5s, 10s, 15s, respectively, and the "send" is continuously or intermittently sent to indicate the preset time, and for example, when the timing unit is sounded by different instrumental sounds or human sounds, there are various ways to indicate the real-time length by sounds, not listed here.

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 that the timing unit reaches the preset time and informing the user of the state, and the timing unit does not have the second function any more. Thus, the control of the second function is cancelled: in the third embodiment, when the timing unit is started, the timing indication module is not started at the same time, and only when the timing unit reaches the preset time, the timing indication module is started and indicates that the preset time is reached; when the timing unit counts time 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, and the LED lamp is turned on when the timing unit reaches the preset time or 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 sound indication, and is a buzzer, and the buzzer is turned on to make a sound only when the timing unit reaches the preset time or when the safety switch is triggered for the second time, and the sound is continuously made to indicate that the preset time is reached, and the timing sound module is not turned on during the timing of the timer.

Fourth embodiment

As shown in fig. 5-6, different from the first embodiment, the jaw closing switch 62 and the firing switch 63 of the fourth embodiment are integrated into a switch, i.e., a closing/firing switch 62 ', when the switch is activated in an active state, if the jaw assembly is in a jaw open state, the control module 90 receives a signal sent by the switch, and controls the jaw assembly to perform a jaw closing action, if the jaw assembly is in a jaw closed state, the control unit receives the signal sent by the control unit, and controls the cutter assembly 40 to perform a feeding action, and when the third stroke switch is activated, the closing/firing switch 62' is changed from a triggered state to an un-triggered state, and the control unit controls the cutter assembly 40 to perform an automatic one-step back-to-bottom action. Specifically, the operation of the close/fire switch 62' is as follows: 1) the jaw assembly is in a jaw opening state, the closing/firing switch 62 'is in an effective state, the closing/firing switch 62' is triggered, and the control module controls the execution of the jaw closing action; 2) when the jaw assembly is fully closed, the jaw assembly is transitioned to a jaw closed state and closure/firing switch 62' is transitioned to a disabled state; 3) triggering a safety switch 69, starting the squeezing holding mechanism until the squeezing timing action is finished, or triggering the safety switch 69 again, wherein the safety switch 69 is invalid, and the closing/triggering switch 62' is converted into an effective state; 4) then triggering the closing/firing switch 62', the control module 90 controls the firing action; 5) after the cutting is finished and the cutting is finished, the closing/firing switch 62 'is stopped to be triggered, the retracting action of automatically retracting the cutter to the bottom is executed until the cutter retracting is finished, the cutter assembly 40 is in the cutter retracting finishing state, and the closing/firing switch 62' is converted into the failure state. Further, as shown in FIG. 6, the close/fire switch 62' is activated by one key, the second key 72, and the third key 73 is not provided.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A squeezing time obtaining method of a surgical instrument comprises a safety switch, a firing switch and a timing unit, wherein when the safety switch is in an effective state, the firing switch is in a failure state, and a user operates the safety switch in the effective state to unlock the firing switch to enable the firing switch to be in the effective state; the squeezing time obtaining method is characterized by comprising the following steps of:

step S10: when the safety switch in an effective state is triggered for the first time, the timing unit is started to start timing;

step S20: triggering the trigger switch in an effective state for the first time, and closing the timing unit;

step S30: and acquiring the time length timed by the timing unit, wherein the time length is the squeezing time, storing the squeezing time, and resetting the timing unit.

2. The pressing time acquisition method according to claim 1, wherein the surgical instrument further comprises a jaw opening switch, comprising, between step S10 and step S20, step S11: when the safety switch is in an effective state, the jaw opening switch is triggered, the safety switch is converted into a failure state from the effective state, the trigger switch keeps the failure state, the timing unit is closed, and the timing unit is cleared.

3. The press time acquisition method according to claim 1, wherein the surgical instrument further comprises a jaw opening switch, comprising, between step S10 and step S20, step S12: and a user operates the safety switch in the effective state to unlock the trigger switch to enable the trigger switch to be in the effective state, the jaw opening switch is triggered, the safety switch keeps in the failure state, the trigger switch is switched from the effective state to the failure state, the timing unit is closed, and the timing unit is cleared.

4. The pressing time acquisition method according to claim 1, wherein the surgical instrument further comprises a timing unit, the timing unit being provided with a preset time; the step that the user operates the safety switch in the effective state to unlock the trigger switch so that the trigger switch is in the effective state comprises the following steps: when the safety switch in the effective state is triggered for the first time, the timing unit is started, when the preset time is reached, the safety switch is switched from the effective state to the invalid state, and the trigger switch is switched from the invalid state to the effective state.

5. The pressing time obtaining method according to claim 4, wherein when the safety switch is triggered again when the preset time is not reached, the safety switch is changed from an active state to a passive state, and the trigger switch is changed from the passive state to the active state.

6. The pressing time obtaining method according to claim 1, wherein the step of the user operating the safety switch in the active state to unlock the trigger switch in the active state comprises: when the safety switch is triggered for the first time in an effective state, the safety switch is switched to a failure state from the effective state, and the trigger switch is switched to the effective state from the failure state.

7. The method for obtaining squeezing time according to claim 1, wherein the surgical instrument further comprises a jaw closing switch, and the step S10 is preceded by the step of: and triggering the jaw closing switch to enable the jaw assembly to perform jaw closing action, wherein when the jaw assembly is converted from the opening state to the closing state, the safety switch is converted from the failure state to the effective state.

8. The pressing time acquisition method according to claim 1, wherein the surgical instrument is a motor-driven stapler.

9. A method of obtaining squeeze time for a surgical instrument comprising a jaw assembly, a cutter assembly, a firing switch, a jaw closing switch, and a timing unit: the squeezing time obtaining method is characterized by comprising the following steps of:

step S10: triggering the jaw closing switch to enable the jaw assembly to execute jaw closing action, and starting a timing unit to start timing when the jaw assembly is converted from an open state to a closed state;

step S20: triggering the trigger switch to enable the cutting knife assembly to start executing a trigger action, and closing the timing unit;

10. The pressing time obtaining method according to claim 9, wherein the surgical instrument further includes a jaw opening switch, and the step S11 between the step S10 and the step S20 includes turning off the timer unit and clearing the timer unit when the jaw opening switch is triggered.

11. The squeezing time obtaining method according to claim 9, wherein the surgical instrument further comprises a safety switch, the firing switch is in a failure state when the safety switch is in an active state, and a user operates the safety switch in the active state to unlock the firing switch in the active state; the step S10 further includes: the safety switch is configured to transition from a disabled condition to an enabled condition when the jaw assembly transitions from the open condition to the closed condition.

12. The pressing time acquisition method according to claim 11, wherein the surgical instrument further comprises a timing unit, the timing unit being provided with a preset time; the step that the safety switch in the effective state is operated by the user to unlock the trigger switch so that the trigger switch is in the effective state comprises the following steps: when the safety switch in the effective state is triggered for the first time, the timing unit is started, when the preset time is reached, the safety switch is converted into the failure state from the effective state, and the trigger switch is converted into the effective state from the failure state.

13. The pressing time obtaining method according to claim 12, wherein when the safety switch is triggered again when the preset time is not reached, the safety switch is changed from an active state to a passive state, and the trigger switch is changed from the passive state to the active state.

14. The pressing time obtaining method according to claim 11, wherein the step of the user operating the safety switch in the active state to unlock the trigger switch in the active state comprises: when the safety switch in the effective state is triggered for the first time, the safety switch is switched from the effective state to the invalid state, and the trigger switch is switched from the invalid state to the effective state.

15. The method of claim 9, wherein the surgical instrument is a powered stapler.

16. A surgical instrument comprising a memory, a processor, and a program stored on the memory and executable on the processor, wherein: the processor, when executing the program, implements the method of any of claims 1 to 15.