A surgical instrument

Abstract

The embodiment of the present application provides a surgical instrument, which comprises a handle assembly, a barrel assembly, a jaw assembly and a cartridge assembly. The cartridge assembly comprises a cartridge seat and a firing member, and a driving device in the handle assembly drives the firing member to move relative to the cartridge seat through a transmission mechanism in the barrel assembly. Before suturing a patient tissue, the firing member is driven by the transmission mechanism to move from a firing initial position to a firing end position, so that the firing of the cartridge assembly is completed. By arranging a resistance adjusting position and an adjusting member between the firing initial position and the firing end position, the resistance of the firing member during the firing process is changed, so that the driving current of the driving device generates a current characteristic corresponding to the resistance adjusting position; and the type of the cartridge assembly or the driving mode of the driving device to the transmission mechanism is determined. The identification of the cartridge assembly can be safely and reliably realized, and the suturing effect on the patient tissue is ensured.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a surgical instrument. Background Technology

[0002] During surgical procedures, clinicians use surgical suture instruments to cut and suture patient tissue. Surgical suture instruments may include a staple cartridge, in which staples are deployed into the patient tissue via a firing mechanism to perform suturing. In clinical practice, different types and heights of staple cartridges need to be selected based on the characteristics of the patient's tissue. If the type of staple cartridge is not known when performing firing and cutting suturing with surgical suture instruments, the final cutting and suturing outcome may be affected.

[0003] Currently, the commonly used smart chips, sensors, and wireless identification systems for staple cartridge recognition face challenges due to the electrical wiring required for sensor placement. This difficulty arises within the confined space of the suture barrel. Another significant issue is that the wiring passing through moving joints cannot be waterproofed or protected against corrosion. Water or dirt entering the wiring can disrupt the electrical circuit, affecting staple cartridge recognition, ultimately leading to functional failure, impacting surgical outcomes, and even causing medical accidents. Therefore, how to safely and reliably achieve staple cartridge recognition in surgical suture instruments, and how to employ appropriate actuation methods for the staple cartridge drive mechanism to ensure suturing effectiveness, are pressing problems that need to be addressed. Summary of the Invention

[0004] The following is an overview of the subject matter described in detail in this application. This overview is not intended to limit the scope of the claims.

[0005] This application provides a surgical instrument that can safely and reliably identify staple cartridge components, ensuring effective suturing of patient tissues.

[0006] On one hand, embodiments of this application provide a surgical instrument, including a handle assembly, a barrel assembly, a jaw assembly, and a staple cartridge assembly, wherein:

[0007] The handle assembly includes a drive device and a control device;

[0008] One end of the barrel assembly is connected to the handle assembly, and the barrel assembly includes a transmission mechanism connected to the drive device;

[0009] The other end of the barrel assembly is connected to the jaw assembly. The jaw assembly includes a first jaw and a second jaw. The first jaw and the second jaw are movably connected. The first jaw and the second jaw can move relative to each other to achieve closing and opening. A mounting cavity is formed between the first jaw and the second jaw.

[0010] The staple cartridge assembly is installed in the mounting cavity. The staple cartridge assembly includes a staple cartridge seat and a firing member. The firing member is disposed in the staple cartridge seat. The staple cartridge seat has a mounting groove for mounting suture staples, a firing initial position away from the mounting groove, and a firing end position close to the mounting groove. The transmission mechanism can drive the firing member to move from the firing initial position to the firing end position. A first resistance adjustment position and a second resistance adjustment position are provided between the firing initial position and the firing end position. The first resistance adjustment position and the second resistance adjustment position are provided with adjustment members for changing the resistance encountered by the firing member when it passes through.

[0011] The control device is configured to:

[0012] The drive current of the drive device is obtained, and a first current feature corresponding to the first resistance adjustment position and a second current feature corresponding to the second resistance adjustment position are extracted from the drive current.

[0013] The type of the staple cartridge assembly is determined based on the first current characteristic and the second current characteristic, or the driving method of the drive device on the transmission mechanism is determined based on the first current characteristic and the second current characteristic.

[0014] In one embodiment of this application, for different types of staple cartridge assemblies, the resistance generated by the first resistance adjustment position and / or the second resistance adjustment position on the firing member is different; both the first current characteristic and the second current characteristic include multiple consecutive current values;

[0015] Determining the type of the staple cartridge assembly based on the first current characteristic and the second current characteristic includes:

[0016] The first feature value is determined based on the range into which the peak or average current value in the first current feature falls;

[0017] The second characteristic value is determined based on the range into which the peak or average current value in the second current characteristic falls;

[0018] The type of the staple cartridge component is determined based on the combination of the first feature value and the second feature value.

[0019] In one embodiment of this application, the adjusting member is a protrusion disposed on the staple cartridge seat.

[0020] In one embodiment of this application, the firing member is provided with a groove that matches the protrusion.

[0021] In one embodiment of this application, for different types of staple cartridge components, at least one of the following conditions is met:

[0022] The shape, length, or thickness of the protrusion at the first resistance adjustment position are different;

[0023] The shape, length, or thickness of the protrusion at the second resistance adjustment position are different.

[0024] In one embodiment of this application, the adjusting member is a groove disposed in the nail cartridge seat, and the firing member is provided with a protrusion that matches the groove.

[0025] In one embodiment of this application, for different types of staple cartridge components, at least one of the following conditions is met:

[0026] The shape, length, or thickness of the protrusion at the first resistance adjustment position are different;

[0027] The number of protrusions matching the grooves at the first resistance adjustment position is different;

[0028] The shape, length, or thickness of the protrusion at the second resistance adjustment position is different;

[0029] The number of protrusions matching the grooves at the second resistance adjustment position is different.

[0030] In one embodiment of this application, the firing component includes a slider and a cutting blade, one end of the cutting blade being connected to the slider and the other end being connected to the transmission mechanism; the groove is disposed on the slider or on the cutting blade.

[0031] In one embodiment of this application, the firing member includes a slider and a cutting blade, one end of the cutting blade is connected to the slider, and the other end is connected to the transmission mechanism; the protrusion is disposed on the slider or disposed on the cutting blade.

[0032] In one embodiment of this application, for different types of staple cartridge components, at least one of the following conditions is met:

[0033] The distance between the first resistance adjustment position and the initial firing position is different;

[0034] The distance between the second resistance adjustment position and the initial firing position is different;

[0035] The distance between the first resistance adjustment position and the second resistance adjustment position is different.

[0036] In one embodiment of this application, both the first current characteristic and the second current characteristic include multiple consecutive current values, and determining the type of the stapling cartridge assembly based on the first current characteristic and the second current characteristic includes any one of the following:

[0037] The type of the staple cartridge assembly is determined based on the time interval between the peak current in the first current characteristic and the peak current in the second current characteristic;

[0038] The type of the stud cartridge assembly is determined based on the first duration corresponding to the peak current in the first current characteristic when the firing member begins to move, and the second duration corresponding to the peak current in the second current characteristic when the firing member begins to move.

[0039] On the other hand, embodiments of this application provide a surgical instrument, including a handle assembly, a barrel assembly, a jaw assembly, and a staple cartridge assembly, wherein:

[0040] The handle assembly includes a drive device and a control device;

[0041] One end of the barrel assembly is connected to the handle assembly, and the barrel assembly includes a transmission mechanism connected to the drive device;

[0042] The other end of the barrel assembly is connected to the jaw assembly. The jaw assembly includes a first jaw and a second jaw. The first jaw and the second jaw are movably connected. The first jaw and the second jaw can move relative to each other to achieve closing and opening. A mounting cavity is formed between the first jaw and the second jaw.

[0043] The staple cartridge assembly is installed in the mounting cavity. The staple cartridge assembly includes a staple cartridge seat and a firing member. The firing member is disposed in the staple cartridge seat. The staple cartridge seat has a mounting groove for mounting suture staples, a firing initial position away from the mounting groove, and a firing end position close to the mounting groove. The transmission mechanism can drive the firing member to move from the firing initial position to the firing end position. At least one resistance adjustment position is provided between the firing initial position and the firing end position. The resistance adjustment position is provided with an adjustment member for changing the resistance encountered by the firing member when it passes through.

[0044] The control device is configured to:

[0045] Obtain the drive current of the drive device, and extract the current feature corresponding to the at least one resistance adjustment position from the drive current;

[0046] The type of the staple cartridge assembly is determined based on the current characteristics, or the driving method of the drive device on the transmission mechanism is determined based on the current characteristics.

[0047] In one embodiment of this application, the number of resistance adjustment positions differs for different types of the stud cartridge assembly;

[0048] Determining the type of the stapling cartridge assembly based on the current characteristics includes:

[0049] The type of the staple cartridge assembly is determined based on the number of current characteristics.

[0050] On the other hand, embodiments of this application provide a surgical instrument, including a handle assembly, a barrel assembly, a jaw assembly, and a staple cartridge assembly, wherein:

[0051] The handle assembly includes a drive device and a control device;

[0052] One end of the barrel assembly is connected to the handle assembly, and the barrel assembly includes a transmission mechanism connected to the drive device;

[0053] The other end of the barrel assembly is connected to the jaw assembly. The jaw assembly includes a first jaw and a second jaw. The first jaw and the second jaw are movably connected. The first jaw and the second jaw can move relative to each other to achieve closing and opening. A mounting cavity is formed between the first jaw and the second jaw.

[0054] The staple cartridge assembly is installed in the mounting cavity. The staple cartridge assembly includes a staple cartridge seat and a firing member. The firing member is disposed in the staple cartridge seat. The staple cartridge seat has a mounting groove for mounting suture staples, a firing initial position away from the mounting groove, and a firing end position close to the mounting groove. The transmission mechanism can drive the firing member to move from the firing initial position to the firing end position. A first resistance adjustment position and a second resistance adjustment position are provided between the firing initial position and the firing end position. The first resistance adjustment position and the second resistance adjustment position are provided with adjustment members for changing the resistance encountered by the transmission mechanism when it passes through.

[0055] The control device is configured to:

[0056] The drive current of the drive device is obtained, and a first current feature corresponding to the first resistance adjustment position and a second current feature corresponding to the second resistance adjustment position are extracted from the drive current.

[0057] The type of the staple cartridge assembly is determined based on the first current characteristic and the second current characteristic, or the driving method of the drive device on the transmission mechanism is determined based on the first current characteristic and the second current characteristic.

[0058] On the other hand, embodiments of this application provide a surgical instrument, including a handle assembly, a barrel assembly, a jaw assembly, and a staple cartridge assembly, wherein:

[0059] The handle assembly includes a drive device and a control device;

[0060] One end of the barrel assembly is connected to the handle assembly, and the barrel assembly includes a transmission mechanism connected to the drive device;

[0061] The other end of the barrel assembly is connected to the jaw assembly. The jaw assembly includes a first jaw and a second jaw. The first jaw and the second jaw are movably connected. The first jaw and the second jaw can move relative to each other to achieve closing and opening. A mounting cavity is formed between the first jaw and the second jaw.

[0062] The staple cartridge assembly is installed in the mounting cavity. The staple cartridge assembly includes a staple cartridge seat and a firing member. The firing member is disposed in the staple cartridge seat. The staple cartridge seat has a mounting groove for mounting suture staples, a firing initial position away from the mounting groove, and a firing end position close to the mounting groove. The transmission mechanism can drive the firing member to move from the firing initial position to the firing end position. At least one resistance adjustment position is provided between the firing initial position and the firing end position. The resistance adjustment position is provided with an adjustment member for changing the resistance encountered by the transmission mechanism when it passes through.

[0063] The control device is configured to:

[0064] Obtain the drive current of the drive device, and extract the current feature corresponding to the at least one resistance adjustment position from the drive current;

[0065] The type of the staple cartridge assembly is determined based on the current characteristics, or the driving method of the drive device on the transmission mechanism is determined based on the current characteristics.

[0066] The embodiments of this application include at least the following beneficial effects:

[0067] On one hand, one embodiment of this application provides a surgical instrument including a handle assembly, a barrel assembly, a jaw assembly, and a cartridge assembly. The handle assembly, barrel assembly, and jaw assembly are connected sequentially, and the cartridge assembly is installed in a mounting cavity formed between the first and second jaws of the jaw assembly. The cartridge assembly includes a cartridge seat and a firing member. After the cartridge assembly is installed into the mounting cavity, the firing member is connected to a transmission mechanism in the barrel assembly. The drive device in the handle assembly drives the firing member to move relative to the cartridge seat through the transmission mechanism in the barrel assembly. Before suturing the patient's tissue, the transmission mechanism drives the firing member from a firing initial position away from the mounting slot for mounting the suture staples to a firing end position closer to the mounting slot, thus firing the cartridge assembly. By setting two resistance adjustment positions between the firing initial position and the firing end position, and setting adjustment members at the two resistance adjustment positions, the resistance encountered by the firing member when passing through the two resistance adjustment positions during firing is changed, thereby causing the drive current of the drive device to generate current characteristics corresponding to the two resistance adjustment positions. The drive current of the drive device is then acquired via a control device, and the current characteristics corresponding to the two resistance adjustment positions are extracted from the drive current. Finally, the type of staple cartridge assembly is determined based on the difference in the current characteristics corresponding to the two resistance adjustment positions, or the drive method of the drive device on the transmission mechanism is determined based on the difference in the current characteristics corresponding to the two resistance adjustment positions. This eliminates the need to install electrical components and lay electrical wiring on the staple cartridge assembly, avoiding abnormal identification of the staple cartridge assembly due to electrical circuit failure and avoiding the use of inappropriate drive methods to drive the drive device of the staple cartridge assembly. It can safely and reliably achieve identification of the staple cartridge assembly, ensuring the suturing effect on the patient's tissues.

[0068] On the other hand, a surgical instrument provided in one embodiment of this application, by setting at least one resistance adjustment position between the initial firing position and the final firing position, and by setting an adjustment member at the resistance adjustment position, changes the resistance encountered by the firing member when passing through the resistance adjustment position during the firing process, thereby causing the drive current of the drive device to generate a current characteristic corresponding to at least one resistance adjustment position. The drive current of the drive device is then acquired by a control device, and the current characteristic corresponding to at least one resistance adjustment position is extracted from the drive current. Finally, the type of staple cartridge assembly is determined based on the difference in the current characteristics corresponding to at least one resistance adjustment position, or the driving method of the drive device on the transmission mechanism is determined based on the difference in the current characteristics corresponding to at least one resistance adjustment position. This eliminates the need to install electrical components and arrange electrical wiring on the staple cartridge assembly, avoiding electrical circuit failures that could lead to abnormal identification of the staple cartridge assembly and avoiding the use of inappropriate driving methods to drive the drive device of the staple cartridge assembly. This enables safe and reliable identification of the staple cartridge assembly, ensuring the suturing effect on the patient's tissues.

[0069] On the other hand, a surgical instrument provided in one embodiment of this application, by setting two resistance adjustment positions between the initial firing position and the final firing position, and by setting adjustment members at the two resistance adjustment positions, changes the resistance encountered by the transmission mechanism when passing through the two resistance adjustment positions during firing, thereby causing the drive current of the drive device to generate current characteristics corresponding to the two resistance adjustment positions. The drive current of the drive device is then acquired by a control device, and the current characteristics corresponding to the two resistance adjustment positions are extracted from the drive current. Finally, the type of staple cartridge assembly is determined based on the difference in the current characteristics corresponding to the two resistance adjustment positions, or the driving method of the drive device on the transmission mechanism is determined based on the difference in the current characteristics corresponding to the two resistance adjustment positions. This eliminates the need to install electrical components and arrange electrical wiring on the staple cartridge assembly, avoiding electrical circuit failures that could lead to abnormal identification of the staple cartridge assembly and avoiding the use of inappropriate driving methods to drive the drive device of the staple cartridge assembly. This enables safe and reliable identification of the staple cartridge assembly, ensuring the suturing effect on the patient's tissues.

[0070] On the other hand, a surgical instrument provided in one embodiment of this application, by setting at least one resistance adjustment position between the initial firing position and the final firing position, and by setting an adjustment member at the resistance adjustment position, changes the resistance encountered by the transmission mechanism when passing through the resistance adjustment position during firing, thereby causing the drive current of the drive device to generate a current characteristic corresponding to at least one resistance adjustment position. The drive current of the drive device is then acquired by a control device, and the current characteristic corresponding to at least one resistance adjustment position is extracted from the drive current. Finally, the type of staple cartridge assembly is determined based on the difference in the current characteristics corresponding to at least one resistance adjustment position, or the driving method of the drive device on the transmission mechanism is determined based on the difference in the current characteristics corresponding to at least one resistance adjustment position. This eliminates the need to install electrical components and arrange electrical wiring on the staple cartridge assembly, avoiding electrical circuit failures that could lead to abnormal identification of the staple cartridge assembly and avoiding the use of inappropriate driving methods to drive the drive device of the staple cartridge assembly. This enables safe and reliable identification of the staple cartridge assembly, ensuring the suturing effect on the patient's tissues.

[0071] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. Attached Figure Description

[0072] The accompanying drawings are used to provide a further understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0073] Figure 1 This is a schematic diagram of the overall appearance of the surgical instruments provided in the embodiments of this application;

[0074] Figure 2 A cross-sectional view of the transmission mechanism, jaw assembly, and staple cartridge assembly of a surgical instrument provided in an embodiment of this application;

[0075] Figure 3 A top view of the staple cartridge assembly of a surgical instrument provided in an embodiment of this application;

[0076] Figure 4 A flowchart of the operation control method performed by the control device of the surgical instrument provided in the embodiments of this application;

[0077] Figure 5 A flowchart of an operation control method performed by a control device for a surgical instrument provided in another embodiment of this application;

[0078] Figures 6a to 6i A schematic diagram of the drive current curve of the drive device obtained by the control device of the surgical instrument provided in the embodiments of this application;

[0079] Figure 7 A flowchart of an operation control method performed by a control device for a surgical instrument provided in another embodiment of this application;

[0080] Figure 8 A cross-sectional view of a staple cartridge holder with protrusions provided in an embodiment of this application;

[0081] Figure 9 A top view of the slider of a surgical instrument provided in an embodiment of this application;

[0082] Figure 10 A three-dimensional schematic diagram of the slider of a surgical instrument provided in an embodiment of this application;

[0083] Figure 11 A schematic diagram of the drive current curve of a drive device provided in another embodiment of this application;

[0084] Figure 12 A schematic diagram of the drive current curve of a drive device provided in another embodiment of this application. Detailed Implementation

[0085] The present application will be further described below with reference to the accompanying drawings and specific embodiments. The described embodiments should not be considered as limitations on the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

[0086] In the following description, references are made to “some embodiments,” which describe a subset of all possible embodiments. However, it is understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0087] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0088] Currently, surgical instruments with staple cartridges can be fired and driven by a drive device to suture patient tissues. However, in actual clinical practice, different types of staple cartridges with different staple heights need to be selected according to the characteristics of the patient's tissues. Therefore, recognizing the staple cartridge during the firing process and using an appropriate drive method to drive the drive device of the staple cartridge can ensure the suturing effect on the patient's tissues.

[0089] like Figure 1 The image shown is a schematic diagram of the overall appearance of a surgical instrument provided in one embodiment of this application. (Refer to...) Figure 1 The surgical instrument includes a handle assembly 100, a barrel assembly 200, a jaw assembly 300, and a staple cartridge assembly 400, wherein:

[0090] The handle assembly 100 includes a drive unit and a control unit; specifically, the drive unit and the control unit are disposed inside the housing of the handle assembly 100, therefore Figure 1 The drive and control devices are not shown.

[0091] One end of the barrel assembly 200 is connected to the handle assembly 100, and the barrel assembly 200 includes a transmission mechanism 210 connected to a drive device; specifically, the transmission mechanism 210 is disposed inside the barrel assembly 200, therefore Figure 1 The transmission mechanism 210 is not shown.

[0092] The other end of the barrel assembly 200 is connected to the jaw assembly 300, which includes a first jaw 310 and a second jaw 320. The first jaw 310 and the second jaw 320 are movably connected and can move relative to each other to achieve closing and opening. A mounting cavity is formed between the first jaw 310 and the second jaw 320. Figure 1 The first jaw 310 and the second jaw 320 shown are in the open state. Figure 2 The first jaw 310 and the second jaw 320 shown are in a closed state.

[0093] The staple cartridge assembly 400 is installed in the mounting cavity, such as... Figure 2 and Figure 3 As shown, the staple cartridge assembly 400 includes a staple cartridge seat 410 and a firing member 420. The firing member 420 is disposed in the staple cartridge seat 410. The staple cartridge seat 410 has a mounting groove 411 for mounting staples, a firing initial position 401 away from the mounting groove 411, and a firing end position 402 near the mounting groove 411. (Refer to...) Figure 2 After the staple cartridge assembly 400 is installed into the mounting cavity in the jaw assembly 300, the transmission mechanism 210 is connected to the firing member 420 of the staple cartridge assembly 400, so that the transmission mechanism 210 can drive the firing member 420 to move from the initial firing position 401 to the final firing position 402, thus completing the firing process of the staple cartridge assembly 400.

[0094] A first resistance adjustment position and a second resistance adjustment position are provided between the initial firing position 401 and the final firing position 402. Adjustment members are provided at both positions to change the resistance encountered by the firing member 420 as it passes through. It is understood that during the firing of the staple cartridge assembly 400, that is, during the movement of the firing member 420 from the initial firing position 401 to the final firing position 402 driven by the transmission mechanism 210, it will pass through the first and second resistance adjustment positions. The adjustment members at these two positions change the resistance encountered by the firing member 420. During firing, the resistance encountered by the firing member 420 manifests as a change in the drive current of the driving device, causing the drive current of the driving device to exhibit corresponding current characteristics.

[0095] In one embodiment, the control device is configured to perform Figure 4 The operation control method shown includes, but is not limited to, steps S410 to S420.

[0096] Step S410: Obtain the drive current of the drive device, and extract the first current feature corresponding to the first resistance adjustment position and the second current feature corresponding to the second resistance adjustment position from the drive current.

[0097] Step S420: Determine the type of the staple cartridge assembly 400 based on the first current characteristic and the second current characteristic.

[0098] In one embodiment, the control device is configured to perform Figure 5 The operation control method shown includes, but is not limited to, steps S510 to S520.

[0099] Step S510: Obtain the drive current of the drive device, and extract the first current feature corresponding to the first resistance adjustment position and the second current feature corresponding to the second resistance adjustment position from the drive current.

[0100] Step S520: Determine the driving mode of the drive device for the transmission mechanism 210 based on the first current characteristic and the second current characteristic.

[0101] Understandably, when the firing member 420 does not encounter the adjusting member, the driving current of the drive device should be relatively stable with minimal fluctuations. In this case, the drive device only needs to overcome the friction between the firing member 420 and the cartridge seat 410 to drive the firing member 420. However, the adjusting members located at the first and second resistance adjustment positions increase the resistance encountered by the firing member 420 when it passes the adjusting members at the first and second resistance adjustment positions. The drive device needs a larger driving current to generate sufficient torque to drive the transmission mechanism 210, which in turn drives the firing member 420 to move away from the first and second resistance adjustment positions and continue forward.

[0102] In steps S410 and S510, after obtaining the drive current of the driving device, a first current characteristic and a second current characteristic that are larger than the current at other positions can be extracted from the drive current of the driving device. For example, assuming that the drive current of the driving device generally fluctuates around 0.5A when the firing member 420 does not encounter the adjusting member, when the firing member 420 passes the adjusting member, it needs to overcome the resistance brought by the adjusting member, and the drive current of the driving device will increase to more than 0.8A. Then, the curve of the drive current of the driving device will show two convex regions, namely the first current characteristic corresponding to the first resistance adjustment position and the second current characteristic corresponding to the second resistance adjustment position. At this time, both the first current characteristic and the second current characteristic are composed of multiple consecutive current values ​​greater than 0.8A.

[0103] In step S420, the type of the staple cartridge assembly 400 is determined based on the difference in current characteristics corresponding to the two resistance adjustment positions. This eliminates the need to install electrical components and lay electrical wiring on the staple cartridge assembly 400, avoiding abnormal identification of the staple cartridge assembly 400 due to electrical circuit failure, and enabling safe and reliable identification of the staple cartridge assembly 400.

[0104] In step S520, the driving mode of the drive device for the transmission mechanism 210 is determined according to the difference in current characteristics corresponding to the two resistance adjustment positions. This avoids using an inappropriate driving mode to drive the drive device of the staple cartridge assembly 400, thus ensuring the suturing effect on the patient's tissue.

[0105] It is understandable that different driving methods of the drive device on the transmission mechanism 210 can be manifested by the control device providing drive voltages with different amplitudes, drive voltages with different frequencies, or drive currents with different magnitudes to the drive device, so that the torque output by the drive device on the transmission mechanism 210 is different, or that the speed at which the drive device drives the transmission mechanism 210 to move is different.

[0106] In one embodiment, for different types of stud cartridge assemblies 400, the first resistance adjustment position and / or the second resistance adjustment position generate different resistances to the firing member 420.

[0107] In this embodiment, the resistance generated by the firing member 420 varies, and the current characteristics that can be extracted from the driving current of the driving device will naturally be different. As mentioned above, both the first current characteristic and the second current characteristic include multiple consecutive current values. For example, if the resistance generated by the adjusting member in the resistance adjustment position on the firing member 420 is small, the multiple current values ​​in the corresponding current characteristics are greater than 0.8A but less than 1.2A; if the resistance generated by the adjusting member in the resistance adjustment position on the firing member 420 is large, the multiple current values ​​in the corresponding current characteristics are greater than 1.2A.

[0108] Furthermore, in this embodiment, a schematic diagram of the drive current curve of the drive device that may be obtained is shown below. Figures 6a to 6i As shown, V0 can represent 0.5A, V1 can represent 0.8A, and V2 can represent 1.2A. Therefore, Figure 6a The first current feature and the second current feature extracted from the driving current both include multiple consecutive current values ​​greater than 1.2A, thus it can be determined that the staple cartridge assembly 400 is provided with adjustment components that generate greater resistance to the firing component 420 at both the first resistance adjustment position and the second resistance adjustment position. Figure 6b The first current feature extracted from the driving current includes multiple consecutive current values ​​greater than 1.2A, and the second current feature extracted includes multiple consecutive current values ​​greater than 0.8A and less than 1.2A. Therefore, it can be determined that the staple cartridge assembly 400 is provided with an adjustment member that generates greater resistance to the firing member 420 at the first resistance adjustment position, and an adjustment member that generates less resistance to the firing member 420 at the second resistance adjustment position. Figure 6c The first current feature extracted from the driving current includes multiple consecutive current values ​​greater than 0.8A and less than 1.2A, and the second current feature extracted includes multiple consecutive current values ​​greater than 1.2A. Therefore, it can be determined that the staple cartridge assembly 400 is provided with an adjustment member that generates less resistance to the firing member 420 at the first resistance adjustment position, and an adjustment member that generates more resistance to the firing member 420 at the second resistance adjustment position. Figure 6dThe first current feature and the second current feature extracted from the driving current both include multiple consecutive current values ​​greater than 0.8A and less than 1.2A, thus it can be determined that the staple cartridge assembly 400 is provided with adjustment members that generate less resistance to the firing member 420 at both the first resistance adjustment position and the second resistance adjustment position. Figure 6e The first current feature extracted from the driving current includes multiple consecutive current values ​​greater than 1.2A, and the second current feature extracted does not include current values ​​greater than 0.8A. Therefore, it can be determined that the staple cartridge assembly 400 is provided with an adjustment component that generates greater resistance to the firing component 420 at the first resistance adjustment position, and no resistance adjustment component is provided at the second resistance adjustment position. Figure 6f The first current feature extracted from the driving current includes multiple consecutive current values ​​greater than 0.8A and less than 1.2A, and the second current feature extracted does not include current values ​​greater than 0.8A. Therefore, it can be determined that the staple cartridge assembly 400 is provided with an adjustment member that generates less resistance to the firing member 420 at the first resistance adjustment position, and no resistance adjustment member is provided at the second resistance adjustment position. Figure 6g The first current feature extracted from the driving current does not include a current value greater than 0.8A, and the second current feature extracted includes multiple consecutive current values ​​greater than 1.2A. Therefore, it can be determined that the staple cartridge assembly 400 does not have a resistance adjustment component at the first resistance adjustment position, but has an adjustment component at the second resistance adjustment position that generates greater resistance to the firing component 420. Figure 6h The first current feature extracted from the driving current does not include a current value greater than 0.8A, and the second current feature extracted includes multiple consecutive current values ​​greater than 0.8A and less than 1.2A. Therefore, it can be determined that the stud cartridge assembly 400 does not have a resistance adjustment component at the first resistance adjustment position, but has an adjustment component at the second resistance adjustment position that generates less resistance to the firing component 420. Figure 6i The first current feature and the second current feature extracted from the driving current do not include a current value greater than 0.8A. Therefore, it can be determined that the staple cartridge assembly 400 does not have a resistance adjustment component at either the first resistance adjustment position or the second resistance adjustment position, or it can be determined that the mounting cavity in the jaw assembly 300 does not contain the staple cartridge assembly 400.

[0109] In one embodiment, such as Figure 7 As shown, in step S420, the type of the staple cartridge assembly 400 is determined based on the first current characteristic and the second current characteristic, including steps S710 to S730.

[0110] Step S710: Determine the first characteristic value based on the range into which the peak current value or average current value in the first current characteristic falls.

[0111] In this step, if the peak current or average current in the first current characteristic falls within the range of greater than 1.2A, the first characteristic value is H; if the peak current or average current in the first current characteristic falls within the range of 0.8A to 1.2A, the first characteristic value is L; if the peak current or average current in the first current characteristic falls within the range of less than 0.8A, the first characteristic value is / .

[0112] Step S720: Determine the second characteristic value based on the range into which the peak or average current value in the second current characteristic falls.

[0113] In this step, if the peak current or average current value in the second current characteristic falls within the range of greater than 1.2A, the second characteristic value is H; if the peak current or average current value in the second current characteristic falls within the range of 0.8A to 1.2A, the second characteristic value is L; if the peak current or average current value in the second current characteristic falls within the range of less than 0.8A, the second characteristic value is / .

[0114] Step S730: Determine the type of the staple cartridge assembly 400 based on the combination of the first feature value and the second feature value.

[0115] In this embodiment, there are a total of 9 possible combinations of the first and second eigenvalues, as shown in Table 1 below: HH, HL, LH, LL, H / , L / , / H, / L, / / , which correspond to the above-mentioned... Figures 6a to 6i Among them, combination HH corresponds to a black stapler component, combination HL corresponds to a green stapler component, combination LH corresponds to a blue stapler component, combination LL corresponds to a white stapler component, combination H / corresponds to a gold stapler component, combination L / corresponds to a gray stapler component, combination / H corresponds to a yellow stapler component, combination / L corresponds to a purple stapler component, and combination / / corresponds to a red stapler component or no stapler component.

[0116] It is understandable that different colored staple cartridges contain staples of different shapes or sizes, making them suitable for suturing different thicknesses of patient tissue.

[0117] Table 1: Correspondence between the combination of the first and second eigenvalues ​​and the type of staple cartridge component

[0118]

[0119] Understandable Figures 6a to 6iThe schematic diagram of the drive current curve and the corresponding relationship shown in Table 1 are merely one embodiment of determining the type of the staple cartridge assembly 400 based on the first and second characteristic values. This application also includes other equivalent embodiments, such as further refining the ranges to which the first and second characteristic values ​​fall, resulting in more possible values ​​for the first and second characteristic values, for example, four, five, six, or more values ​​for the first and second characteristic values, and correspondingly more combinations of the first and second characteristic values, thereby enabling the identification of more types of staple cartridge assemblies.

[0120] In one embodiment, reference is made to Figure 8 The adjusting component is a protrusion 500 disposed on the nail cartridge seat 410, and the firing component 420 is provided with a groove 600 that matches the protrusion 500. Specifically, the firing component 420 includes a slider 421, such as... Figure 9 and Figure 10 As shown, the groove 600 of the firing member 420 is provided on the slider 421.

[0121] In this embodiment, when the transmission mechanism 210 drives the firing member 420 to move to the first resistance adjustment position or the second resistance adjustment position, the groove 600 on the slider 421 will match and engage with the protrusion 500 at the first resistance adjustment position or the second resistance adjustment position, thereby increasing the resistance experienced by the firing member 420. If the firing member 420 wants to continue moving forward, it needs to break free from the engagement between the groove 600 on the slider 421 and the protrusion 500 on the cartridge seat 410. Therefore, the driving current of the drive device will increase, providing a greater torque to drive the transmission mechanism 210 to move.

[0122] In one embodiment, the protrusion 500 can be provided as an adjustment member only at the first resistance adjustment position and the second resistance adjustment position of the cartridge seat 410, without the need to provide the groove 600 on the firing member 420.

[0123] In this embodiment, when the transmission mechanism 210 drives the firing member 420 to move to the first resistance adjustment position or the second resistance adjustment position, the protrusion 500 at that position will squeeze the side of the firing member 420, thereby increasing the friction force on the firing member 420 and achieving the effect of changing the resistance encountered by the firing member 420 when it passes through.

[0124] In one embodiment, reference is made to... Figure 2 and Figure 3 The firing component 420 includes a slider 421 and a cutting blade 422. One end of the cutting blade 422 is connected to the slider 421, and the other end is connected to the transmission mechanism 210.

[0125] In this embodiment, the groove 600 of the firing member 420 can be disposed on either the slider 421 or the cutting blade 422. When the transmission mechanism 210 drives the firing member 420 to move to the first resistance adjustment position or the second resistance adjustment position, the groove 600 on the cutting blade 422 will match and engage with the protrusion 500 at the first resistance adjustment position or the second resistance adjustment position, thereby increasing the resistance experienced by the firing member 420. If the firing member 420 wants to continue moving forward, it needs to break free from the engagement between the groove 600 on the cutting blade 422 and the protrusion 500 on the cartridge seat 410. Therefore, the driving current of the drive device will increase, providing a greater torque to drive the transmission mechanism 210 to move.

[0126] Furthermore, in this embodiment, for different types of staple cartridge components 400, at least one of the following conditions is met:

[0127] The shape, length, or thickness of the protrusion 500 at the first resistance adjustment position may vary;

[0128] The number of protrusions 500 and grooves 600 at the first resistance adjustment position are different;

[0129] The shape, length, or thickness of the protrusion 500 at the second resistance adjustment position may differ;

[0130] The number of protrusions 500 and grooves 600 at the second resistance adjustment position are different.

[0131] It is understandable that for different types of staple cartridge assemblies 400, only a difference in the resistance generated by either the first resistance adjustment position or the second resistance adjustment position on the firing member 420 is needed to extract different combinations of first and second current characteristics from the drive current of the driving device. Therefore, different shapes, lengths, or thicknesses of the protrusions 500 at the first resistance adjustment position will result in different first current characteristics extracted from the drive current of the driving device; different numbers of protrusions 500 and grooves 600 at the first resistance adjustment position will also result in different first current characteristics extracted from the drive current of the driving device; similarly, different shapes, lengths, or thicknesses of the protrusions 500 at the second resistance adjustment position will result in different second current characteristics extracted from the drive current of the driving device; and different numbers of protrusions 500 and grooves 600 at the second resistance adjustment position will also result in different second current characteristics extracted from the drive current of the driving device. It is understandable that various adjustment members generating different resistances can coexist, making the combinations of first and second current characteristics more diverse, thereby enabling the identification of more types of staple cartridge assemblies 400.

[0132] In another embodiment, the adjusting member is a groove provided in the nail cartridge seat 410, and the firing member 420 is provided with a protrusion that matches the groove. Specifically, the firing member 420 includes a slider 421, and the groove 600 of the firing member 420 is provided on the protrusion.

[0133] In this embodiment, when the transmission mechanism 210 drives the firing member 420 to move to the first resistance adjustment position or the second resistance adjustment position, the protrusion on the slider 421 will match and engage with the groove of the first resistance adjustment position or the second resistance adjustment position, thereby increasing the resistance received by the firing member 420. If the firing member 420 wants to continue moving forward, it needs to break free from the engagement between the protrusion on the slider 421 and the groove on the cartridge seat 410. Therefore, the driving current of the drive device will increase, providing a greater torque to drive the transmission mechanism 210 to move.

[0134] In one embodiment, reference is made to... Figure 2 and Figure 3 The firing component 420 includes a slider 421 and a cutting blade 422. One end of the cutting blade 422 is connected to the slider 421, and the other end is connected to the transmission mechanism 210.

[0135] In this embodiment, the protrusion on the firing member 420 can be disposed not only on the slider 421, but also on the cutting blade 422. When the transmission mechanism 210 drives the firing member 420 to move to the first resistance adjustment position or the second resistance adjustment position, the protrusion on the cutting blade 422 will match and engage with the groove of the first resistance adjustment position or the second resistance adjustment position, thereby increasing the resistance experienced by the firing member 420. If the firing member 420 wants to continue moving forward, it needs to break free from the engagement between the protrusion on the cutting blade 422 and the groove on the nail cartridge seat 410. Therefore, the driving current of the driving device will increase, providing a greater torque to drive the transmission mechanism 210 to move.

[0136] In one embodiment, for different types of staple cartridge components 400, at least one of the following conditions is met:

[0137] The distance between the first resistance adjustment position and the initial firing position 401 is different;

[0138] The distance between the second resistance adjustment position and the initial firing position 401 is different;

[0139] The distance between the first resistance adjustment position and the second resistance adjustment position is different.

[0140] It is understood that the aforementioned embodiments distinguish different types of stud cartridge assemblies 400 by the different resistance generated on the firing member 420 in the first resistance adjustment position or the second resistance adjustment position, which results in different magnitudes of the first current feature and the second current feature extracted by the drive current of the drive device.

[0141] In this embodiment, the time interval between the first current feature and the second current feature extracted by the drive current of the drive device is different due to the different distance between the first resistance adjustment position and the second resistance adjustment position, so as to distinguish different types of staple cartridge components 400.

[0142] In one embodiment, both the first current characteristic and the second current characteristic include multiple consecutive current values. The type of the staple cartridge assembly 400 is determined based on the first current characteristic and the second current characteristic, including any one of the following:

[0143] The type of the stapling cartridge assembly 400 is determined based on the time interval between the current peak value in the first current characteristic and the current peak value in the second current characteristic.

[0144] The type of the stud cartridge assembly 400 is determined based on the first duration T1 corresponding to the peak current in the first current characteristic when the firing member 420 starts moving, and the second duration T2 corresponding to the peak current in the second current characteristic when the firing member 420 starts moving.

[0145] In this embodiment, refer to Figure 11 The different distances between the first resistance adjustment position and the initial firing position 401 will result in different first durations T1 corresponding to the peak current of the firing member 420 starting to move in the first current feature extracted by the drive current of the drive device. Similarly, the different distances between the second resistance adjustment position and the initial firing position 401 will result in different first durations T2 corresponding to the peak current of the firing member 420 starting to move in the second current feature extracted by the drive current of the drive device. Both of these situations will result in different distances between the first and second resistance adjustment positions, leading to different time intervals between the peak current in the first current feature and the peak current in the second current feature, i.e. Figure 11 The time intervals between T1 and T2 are different, and the control device can determine the type of the staple cartridge assembly 400 based on the difference in these time intervals.

[0146] On the other hand, embodiments of this application provide a surgical instrument, referring to... Figure 1 The surgical instrument includes a handle assembly 100, a barrel assembly 200, a jaw assembly 300, and a staple cartridge assembly 400, wherein:

[0147] The handle assembly 100 includes a drive unit and a control unit; the drive unit and the control unit are disposed inside the housing of the handle assembly 100, therefore Figure 1 The drive and control devices are not shown.

[0148] One end of the barrel assembly 200 is connected to the handle assembly 100, and the barrel assembly 200 includes a transmission mechanism 210 connected to a drive device; specifically, the transmission mechanism 210 is disposed inside the barrel assembly 200, therefore Figure 1 The transmission mechanism 210 is not shown.

[0149] The other end of the barrel assembly 200 is connected to the jaw assembly 300, which includes a first jaw 310 and a second jaw 320. The first jaw 310 and the second jaw 320 are movably connected and can move relative to each other to achieve closing and opening. A mounting cavity is formed between the first jaw 310 and the second jaw 320. Figure 1 The first jaw 310 and the second jaw 320 shown are in the open state. Figure 2 The first jaw 310 and the second jaw 320 shown are in a closed state.

[0150] The staple cartridge assembly 400 is installed in the mounting cavity, such as... Figure 2 and Figure 3 As shown, the staple cartridge assembly 400 includes a staple cartridge seat 410 and a firing member 420. The firing member 420 is disposed in the staple cartridge seat 410. The staple cartridge seat 410 has a mounting groove 411 for mounting staples, a firing initial position 401 away from the mounting groove 411, and a firing end position 402 near the mounting groove 411. (Refer to...) Figure 2 After the staple cartridge assembly 400 is installed into the mounting cavity in the jaw assembly 300, the transmission mechanism 210 is connected to the firing member 420 of the staple cartridge assembly 400, so that the transmission mechanism 210 can drive the firing member 420 to move from the initial firing position 401 to the final firing position 402, thus completing the firing process of the staple cartridge assembly 400.

[0151] At least one resistance adjustment position is provided between the initial firing position 401 and the final firing position 402. This resistance adjustment position is equipped with an adjustment member for changing the resistance encountered by the firing member 420 as it passes through. It is understood that during the firing of the staple cartridge assembly 400, that is, during the movement of the firing member 420 from the initial firing position 401 to the final firing position 402 driven by the transmission mechanism 210, it will pass through at least one resistance adjustment position. The adjustment member at this position changes the resistance encountered by the firing member 420. During firing, the resistance encountered by the firing member 420 manifests as a change in the drive current of the driving device, causing the drive current of the driving device to exhibit corresponding current characteristics.

[0152] The control device is configured as follows:

[0153] Obtain the drive current of the drive device, and extract the current feature corresponding to at least one resistance adjustment position from the drive current;

[0154] The type of staple cartridge assembly 400 is determined based on the current characteristics, or the driving method of the drive device on the transmission mechanism 210 is determined based on the current characteristics.

[0155] Understandably, when the firing member 420 does not encounter the adjusting member, the drive current of the drive device should be relatively stable with minimal fluctuations. In this case, the drive device only needs to overcome the friction between the firing member 420 and the cartridge seat 410 to drive the firing member 420. However, the adjusting member located at at least one resistance adjustment position increases the resistance encountered by the firing member 420 when passing through the adjusting member at at least one resistance adjustment position. The drive device needs a larger drive current to generate sufficient torque to drive the transmission mechanism 210, which in turn drives the firing member 420 to leave the resistance adjustment position and continue forward. After obtaining the drive current of the drive device, the control device can extract at least one current characteristic that is larger than the current at other positions from the drive current of the drive device. The type of staple cartridge assembly 400 is determined based on the current characteristics corresponding to at least one resistance adjustment position. This eliminates the need for electrical components and wiring on the staple cartridge assembly 400, avoiding electrical circuit failures that could lead to abnormal identification of the staple cartridge assembly 400, and ensuring safe and reliable identification of the staple cartridge assembly 400. Furthermore, the driving method of the drive device for the transmission mechanism 210 is determined based on the current characteristics corresponding to at least one resistance adjustment position, avoiding the use of inappropriate driving methods to drive the drive device of the staple cartridge assembly 400, and ensuring the suturing effect on the patient's tissues.

[0156] In one embodiment, for different types of staple cartridge assemblies 400, at least one resistance adjustment position generates different resistance to the firing member 420.

[0157] In this embodiment, exemplarily, assuming that the driving current of the drive device generally fluctuates around 0.5A when the firing member 420 does not encounter the adjusting member, when the firing member 420 passes the adjusting member, it needs to overcome the resistance brought by the adjusting member, and the driving current of the drive device will increase to more than 0.8A. Then, the curve of the driving current of the drive device will show at least one convex region, which corresponds to the current characteristics of at least one resistance adjustment position. Each current characteristic consists of multiple consecutive current values ​​greater than 0.8A. If the resistance generated by the adjusting member at the resistance adjustment position on the firing member 420 is small, the multiple current values ​​in the corresponding current characteristics are greater than 0.8A but less than 1.2A; if the resistance generated by the adjusting member at the resistance adjustment position on the firing member 420 is large, the multiple current values ​​in the corresponding current characteristics are greater than 1.2A. Thus, in this embodiment, the corresponding characteristic value can be determined according to the range in which the peak or average current value in at least one current characteristic falls, and the type of the staple cartridge assembly 400 can be determined according to the combination of these characteristic values.

[0158] It is understood that the specific structure of the adjustment component in the resistance adjustment position, and how to generate different resistances to the firing component 420, can be referred to the introduction and description of the aforementioned embodiments, and will not be repeated here.

[0159] In one embodiment, the number of resistance adjustment positions differs for different types of stapling cartridge components 400;

[0160] The type of the staple cartridge assembly 400 is determined based on its current characteristics, including:

[0161] The type of staple cartridge assembly 400 is determined based on the number of current characteristics.

[0162] In this embodiment, refer to Figure 12 Different types of staple cartridge assemblies 400 have different numbers of resistance adjustment positions, which results in different numbers of current features extracted from the drive current of the drive device. Therefore, the type of staple cartridge assembly 400 can be determined based on the number of current features. It is understood that in this embodiment, it is not necessary to focus on the magnitude of the current features, but only on whether the current features exist. The adjustment component set in each resistance adjustment position can be the same.

[0163] On the other hand, embodiments of this application provide a surgical instrument, referring to... Figure 1 The surgical instrument includes a handle assembly 100, a barrel assembly 200, a jaw assembly 300, and a staple cartridge assembly 400, wherein:

[0164] The handle assembly 100 includes a drive unit and a control unit; the drive unit and the control unit are disposed inside the housing of the handle assembly 100, therefore Figure 1 The drive and control devices are not shown.

[0165] One end of the barrel assembly 200 is connected to the handle assembly 100. The barrel assembly 200 includes a transmission mechanism 210 connected to a drive device. The transmission mechanism 210 is disposed inside the barrel assembly 200, therefore... Figure 1 The transmission mechanism 210 is not shown.

[0166] The other end of the barrel assembly 200 is connected to the jaw assembly 300, which includes a first jaw 310 and a second jaw 320. The first jaw 310 and the second jaw 320 are movably connected and can move relative to each other to achieve closing and opening. A mounting cavity is formed between the first jaw 310 and the second jaw 320. Figure 1 The first jaw 310 and the second jaw 320 shown are in the open state. Figure 2 The first jaw 310 and the second jaw 320 shown are in a closed state.

[0167] The staple cartridge assembly 400 is installed in the mounting cavity, such as... Figure 2 and Figure 3 As shown, the staple cartridge assembly 400 includes a staple cartridge seat 410 and a firing member 420. The firing member 420 is disposed in the staple cartridge seat 410. The staple cartridge seat 410 has a mounting groove 411 for mounting staples, a firing initial position 401 away from the mounting groove 411, and a firing end position 402 near the mounting groove 411. (Refer to...) Figure 2 After the staple cartridge assembly 400 is installed into the mounting cavity in the jaw assembly 300, the transmission mechanism 210 is connected to the firing member 420 of the staple cartridge assembly 400, so that the transmission mechanism 210 can drive the firing member 420 to move from the initial firing position 401 to the final firing position 402, thus completing the firing process of the staple cartridge assembly 400.

[0168] A first resistance adjustment position and a second resistance adjustment position are provided between the initial firing position 401 and the final firing position 402. Adjustment components are provided at both positions to change the resistance encountered by the transmission mechanism 210 as it passes through. It is understood that during the firing of the staple cartridge assembly 400, that is, during the movement of the firing component 420 from the initial firing position 401 to the final firing position 402 driven by the transmission mechanism 210, it will pass through the first and second resistance adjustment positions. The adjustment components at these two positions will change the resistance encountered by the transmission mechanism 210 as it passes through. During firing, the resistance encountered by the transmission mechanism 210 will manifest as a change in the drive current of the drive device, causing the drive current of the drive device to exhibit corresponding current characteristics.

[0169] The control device is configured as follows:

[0170] The drive current of the drive device is obtained, and a first current feature corresponding to the first resistance adjustment position and a second current feature corresponding to the second resistance adjustment position are extracted from the drive current.

[0171] The type of the staple cartridge assembly 400 is determined based on the first current characteristic and the second current characteristic, or the driving method of the drive device on the transmission mechanism 210 is determined based on the first current characteristic and the second current characteristic.

[0172] Understandably, when the transmission mechanism 210 does not encounter the adjusting member, the drive current of the drive device should be relatively stable with minimal fluctuations. In this case, the drive device only needs to overcome the friction between the firing member 420 and the cartridge seat 410 to drive the firing member 420. However, the adjusting members located at the first and second resistance adjustment positions increase the resistance encountered by the transmission mechanism 210 when passing through these positions. The drive device requires a larger drive current to generate sufficient torque to propel the transmission mechanism 210 away from the first and second resistance adjustment positions. After obtaining the drive current of the drive device, a first current characteristic and a second current characteristic, which are larger than the current at other positions, can be extracted from it. The type of staple cartridge assembly 400 is determined by the difference in current characteristics corresponding to the two resistance adjustment positions. This eliminates the need for electrical components and wiring on the staple cartridge assembly 400, avoiding electrical circuit failures that could lead to abnormal identification of the staple cartridge assembly 400, and ensuring safe and reliable identification of the staple cartridge assembly 400. The driving method of the drive device for the transmission mechanism 210 is determined by the difference in current characteristics corresponding to the two resistance adjustment positions, avoiding the use of inappropriate driving methods to drive the drive device of the staple cartridge assembly 400, and ensuring the suturing effect on the patient's tissues.

[0173] On the other hand, embodiments of this application provide a surgical instrument, referring to... Figure 1 The surgical instrument includes a handle assembly 100, a barrel assembly 200, a jaw assembly 300, and a staple cartridge assembly 400, wherein:

[0174] The handle assembly 100 includes a drive unit and a control unit; the drive unit and the control unit are disposed inside the housing of the handle assembly 100, therefore Figure 1 The drive and control devices are not shown.

[0175] One end of the barrel assembly 200 is connected to the handle assembly 100, and the barrel assembly 200 includes a transmission mechanism 210 connected to a drive device; specifically, the transmission mechanism 210 is disposed inside the barrel assembly 200, therefore Figure 1 The transmission mechanism 210 is not shown.

[0176] The other end of the barrel assembly 200 is connected to the jaw assembly 300, which includes a first jaw 310 and a second jaw 320. The first jaw 310 and the second jaw 320 are movably connected and can move relative to each other to achieve closing and opening. A mounting cavity is formed between the first jaw 310 and the second jaw 320. Figure 1 The first jaw 310 and the second jaw 320 shown are in the open state. Figure 2 The first jaw 310 and the second jaw 320 shown are in a closed state.

[0177] The staple cartridge assembly 400 is installed in the mounting cavity, such as... Figure 2 and Figure 3 The staple cartridge assembly 400 shown includes a staple cartridge seat 410 and a firing member 420. The firing member 420 is disposed in the staple cartridge seat 410. The staple cartridge seat 410 has a mounting groove 411 for mounting staples, a firing initial position 401 away from the mounting groove 411, and a firing end position 402 near the mounting groove 411. (Refer to...) Figure 2 After the staple cartridge assembly 400 is installed into the mounting cavity in the jaw assembly 300, the transmission mechanism 210 is connected to the firing member 420 of the staple cartridge assembly 400, so that the transmission mechanism 210 can drive the firing member 420 to move from the initial firing position 401 to the final firing position 402, thus completing the firing process of the staple cartridge assembly 400.

[0178] At least one resistance adjustment position is provided between the initial firing position 401 and the final firing position 402. Each resistance adjustment position is equipped with an adjustment member for changing the resistance encountered by the transmission mechanism 210 as it passes through. It is understood that during the firing of the staple cartridge assembly 400, that is, during the movement of the firing member 420 from the initial firing position 401 to the final firing position 402 driven by the transmission mechanism 210, it will pass through at least one resistance adjustment position. The adjustment member at this position changes the resistance encountered by the transmission mechanism 210. During firing, the resistance encountered by the firing member 420 manifests as a change in the drive current of the drive device, causing the drive current of the drive device to exhibit corresponding current characteristics.

[0179] The control device is configured as follows:

[0180] Obtain the drive current of the drive device, and extract the current feature corresponding to at least one resistance adjustment position from the drive current;

[0181] The type of staple cartridge assembly 400 is determined based on the current characteristics, or the driving method of the drive device on the transmission mechanism 210 is determined based on the current characteristics.

[0182] Understandably, when the transmission mechanism 210 does not encounter the adjusting member, the drive current of the drive device should be relatively stable with minimal fluctuations. In this case, the drive device only needs to overcome the friction between the firing member 420 and the cartridge seat 410 to drive the firing member 420. However, the adjusting member located at at least one resistance adjustment position increases the resistance encountered by the transmission mechanism 210 when passing through the adjusting member at at least one resistance adjustment position. The drive device needs a larger drive current to generate sufficient torque to drive the transmission mechanism 210 away from the resistance adjustment position and continue forward. After obtaining the drive current of the drive device, the control device can extract at least one current characteristic that is larger than the current at other positions from the drive current of the drive device. The type of staple cartridge assembly 400 is determined based on the current characteristics corresponding to at least one resistance adjustment position. This eliminates the need for electrical components and wiring on the staple cartridge assembly 400, avoiding electrical circuit failures that could lead to abnormal identification of the staple cartridge assembly 400, and ensuring safe and reliable identification of the staple cartridge assembly 400. Furthermore, the driving method of the drive device for the transmission mechanism 210 is determined based on the current characteristics corresponding to at least one resistance adjustment position, avoiding the use of inappropriate driving methods to drive the drive device of the staple cartridge assembly 400, and ensuring the suturing effect on the patient's tissues.

[0183] It should also be understood that the various implementation methods provided in this application can be combined arbitrarily to achieve different technical effects.

[0184] The above provides a detailed description of the preferred embodiments of this application. However, this application is not limited to the above-described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A surgical instrument, characterized in that, include: A handle assembly, the handle assembly including a drive device and a control device; A barrel assembly, one end of which is connected to the handle assembly, the barrel assembly including a transmission mechanism connected to the drive device; A jaw assembly is provided, with the other end of the barrel assembly connected to the jaw assembly. The jaw assembly includes a first jaw and a second jaw, the first jaw and the second jaw being movably connected. The first jaw and the second jaw are capable of relative movement to achieve closing and opening, and a mounting cavity is formed between the first jaw and the second jaw. A staple cartridge assembly is installed in the mounting cavity. The staple cartridge assembly includes a staple cartridge seat and a firing member. The firing member is disposed in the staple cartridge seat. The staple cartridge seat has a mounting groove for mounting suture staples, a firing initial position away from the mounting groove, and a firing end position close to the mounting groove. A transmission mechanism is capable of driving the firing member to move from the firing initial position to the firing end position. A first resistance adjustment position and a second resistance adjustment position are provided between the firing initial position and the firing end position. The first resistance adjustment position and the second resistance adjustment position are provided with adjustment members for changing the resistance encountered by the firing member when it passes through. The control device is configured as follows: The drive current of the drive device is obtained, and a first current feature corresponding to the first resistance adjustment position and a second current feature corresponding to the second resistance adjustment position are extracted from the drive current. The type of the staple cartridge assembly is determined based on the first current characteristic and the second current characteristic, or the driving method of the drive device on the transmission mechanism is determined based on the first current characteristic and the second current characteristic.

2. The surgical instrument according to claim 1, characterized in that, For different types of staple cartridge assemblies, the resistance generated by the first resistance adjustment position and / or the second resistance adjustment position on the firing member is different; both the first current characteristic and the second current characteristic include multiple consecutive current values; Determining the type of the staple cartridge assembly based on the first current characteristic and the second current characteristic includes: The first feature value is determined based on the range into which the peak or average current value in the first current feature falls; The second characteristic value is determined based on the range into which the peak or average current value in the second current characteristic falls; The type of the staple cartridge component is determined based on the combination of the first feature value and the second feature value.

3. The surgical instrument according to claim 1, characterized in that, The adjustment component is a protrusion disposed on the staple cartridge seat.

4. The surgical instrument according to claim 3, characterized in that, The firing component is provided with a groove that matches the protrusion.

5. The surgical instrument according to claim 3, characterized in that, For different types of the stapling cartridge components, at least one of the following conditions must be met: The shape, length, or thickness of the protrusion at the first resistance adjustment position are different; The shape, length, or thickness of the protrusion at the second resistance adjustment position are different.

6. The surgical instrument according to claim 1, characterized in that, The adjusting component is a groove provided in the nail cartridge seat, and the firing component is provided with a protrusion that matches the groove.

7. The surgical instrument according to claim 4, characterized in that, For different types of the stapling cartridge components, at least one of the following conditions must be met: The shape, length, or thickness of the protrusion at the first resistance adjustment position are different; The number of protrusions matching the grooves at the first resistance adjustment position is different; The shape, length, or thickness of the protrusion at the second resistance adjustment position is different; The number of protrusions matching the grooves at the second resistance adjustment position is different.

8. The surgical instrument according to claim 4, characterized in that, The firing component includes a slider and a cutting blade, one end of which is connected to the slider and the other end of which is connected to the transmission mechanism; the groove is provided on the slider or on the cutting blade.

9. The surgical instrument according to claim 6, characterized in that, The firing component includes a slider and a cutting blade, one end of which is connected to the slider and the other end of which is connected to the transmission mechanism; the protrusion is disposed on the slider or on the cutting blade.

10. The surgical instrument according to claim 1, characterized in that, For different types of the stapling cartridge components, at least one of the following conditions must be met: The distance between the first resistance adjustment position and the initial firing position is different; The distance between the second resistance adjustment position and the initial firing position is different; The distance between the first resistance adjustment position and the second resistance adjustment position is different.

11. The surgical instrument according to claim 10, characterized in that, Both the first current characteristic and the second current characteristic include multiple consecutive current values. Determining the type of the stapling cartridge assembly based on the first current characteristic and the second current characteristic includes any one of the following: The type of the staple cartridge assembly is determined based on the time interval between the peak current in the first current characteristic and the peak current in the second current characteristic; The type of the stud cartridge assembly is determined based on the first duration corresponding to the peak current in the first current characteristic when the firing member begins to move, and the second duration corresponding to the peak current in the second current characteristic when the firing member begins to move.

12. A surgical instrument, characterized in that, include: A handle assembly, the handle assembly including a drive device and a control device; A barrel assembly, one end of which is connected to the handle assembly, the barrel assembly including a transmission mechanism connected to the drive device; A jaw assembly is provided, with the other end of the barrel assembly connected to the jaw assembly. The jaw assembly includes a first jaw and a second jaw, the first jaw and the second jaw being movably connected. The first jaw and the second jaw are capable of relative movement to achieve closing and opening, and a mounting cavity is formed between the first jaw and the second jaw. A staple cartridge assembly is installed in the mounting cavity. The staple cartridge assembly includes a staple cartridge seat and a firing member. The firing member is disposed in the staple cartridge seat. The staple cartridge seat has a mounting groove for mounting suture staples, a firing initial position away from the mounting groove, and a firing end position close to the mounting groove. A transmission mechanism is capable of driving the firing member to move from the firing initial position to the firing end position. At least one resistance adjustment position is provided between the firing initial position and the firing end position. The resistance adjustment position is provided with an adjustment member for changing the resistance encountered by the firing member when it passes through. The control device is configured as follows: Obtain the drive current of the drive device, and extract the current feature corresponding to the at least one resistance adjustment position from the drive current; The type of the staple cartridge assembly is determined based on the current characteristics, or the driving method of the drive device on the transmission mechanism is determined based on the current characteristics.

13. The surgical instrument according to claim 12, characterized in that, The number of resistance adjustment positions varies depending on the different types of the stud cartridge assembly. Determining the type of the stapling cartridge assembly based on the current characteristics includes: The type of the staple cartridge assembly is determined based on the number of current characteristics.

14. A surgical instrument, characterized in that, include: A handle assembly, the handle assembly including a drive device and a control device; A barrel assembly, one end of which is connected to the handle assembly, the barrel assembly including a transmission mechanism connected to the drive device; A jaw assembly is provided, with the other end of the barrel assembly connected to the jaw assembly. The jaw assembly includes a first jaw and a second jaw, the first jaw and the second jaw being movably connected. The first jaw and the second jaw are capable of relative movement to achieve closing and opening, and a mounting cavity is formed between the first jaw and the second jaw. A staple cartridge assembly is installed in the mounting cavity. The staple cartridge assembly includes a staple cartridge seat and a firing member. The firing member is disposed in the staple cartridge seat. The staple cartridge seat has a mounting groove for mounting suture staples, a firing initial position away from the mounting groove, and a firing end position close to the mounting groove. A transmission mechanism is capable of driving the firing member to move from the firing initial position to the firing end position. A first resistance adjustment position and a second resistance adjustment position are provided between the firing initial position and the firing end position. The first resistance adjustment position and the second resistance adjustment position are provided with adjustment members for changing the resistance encountered by the transmission mechanism when it passes through. The control device is configured as follows: The drive current of the drive device is obtained, and a first current feature corresponding to the first resistance adjustment position and a second current feature corresponding to the second resistance adjustment position are extracted from the drive current. The type of the staple cartridge assembly is determined based on the first current characteristic and the second current characteristic, or the driving method of the drive device on the transmission mechanism is determined based on the first current characteristic and the second current characteristic.

15. A surgical instrument, characterized in that, include: A handle assembly, the handle assembly including a drive device and a control device; A barrel assembly, one end of which is connected to the handle assembly, the barrel assembly including a transmission mechanism connected to the drive device; A jaw assembly is provided, with the other end of the barrel assembly connected to the jaw assembly. The jaw assembly includes a first jaw and a second jaw, the first jaw and the second jaw being movably connected. The first jaw and the second jaw are capable of relative movement to achieve closing and opening, and a mounting cavity is formed between the first jaw and the second jaw. A staple cartridge assembly is installed in the mounting cavity. The staple cartridge assembly includes a staple cartridge seat and a firing member. The firing member is disposed in the staple cartridge seat. The staple cartridge seat has a mounting groove for mounting suture staples, a firing initial position away from the mounting groove, and a firing end position close to the mounting groove. A transmission mechanism is capable of driving the firing member to move from the firing initial position to the firing end position. At least one resistance adjustment position is provided between the firing initial position and the firing end position. The resistance adjustment position is provided with an adjustment member for changing the resistance encountered by the transmission mechanism when it passes through. The control device is configured as follows: Obtain the drive current of the drive device, and extract the current feature corresponding to the at least one resistance adjustment position from the drive current; The type of the staple cartridge assembly is determined based on the current characteristics, or the driving method of the drive device on the transmission mechanism is determined based on the current characteristics.

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