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EP-4736785-A1 - SURGICAL INSTRUMENT

EP4736785A1EP 4736785 A1EP4736785 A1EP 4736785A1EP-4736785-A1

Abstract

Embodiments of the application provide a surgical instrument, the surgical instrument includes a handle assembly, a tube assembly, a jaw assembly, and a staple cartridge assembly. The staple cartridge assembly includes a staple cartridge base and a firing member, and a driving apparatus in the handle assembly drives the firing member to move relative to the staple cartridge base through a transmission mechanism in the tube assembly. Before a patient's tissue is sutured, the transmission mechanism drives the firing member to move from a firing initial position to a firing end position, to complete firing of the staple cartridge assembly. A resistance received by the firing member in a process of travelling for the firing is changed by providing resistance adjustment positions and adjustment members between the firing initial position and the firing end position, such that a driving current of the driving apparatus generates a current characteristic corresponding to each of the resistance adjustment positions, thereby determining a type of the staple cartridge assembly, or determining a driving mode applied by the driving apparatus to the transmission mechanism. The surgical instrument is capable of implementing identification of the staple cartridge assembly safely and reliably and ensuring a suture effect of the patient's tissue.

Inventors

  • HUANG, Zhifan
  • LI, XIN
  • LI, Mouyuan
  • JIANG, PING

Assignees

  • Hangzhou Mindray Medical Technology Co., Ltd.

Dates

Publication Date
20260506
Application Date
20251030

Claims (15)

  1. A surgical instrument, comprising: a handle assembly (100), comprising a driving apparatus and a control apparatus; a tube assembly (200), of which an end is connected to the handle assembly (100), the tube assembly (200) comprising a transmission mechanism (210) connected to the driving apparatus; a jaw assembly (300), to which another end of the tube assembly (200) is connected, the jaw assembly (300) comprising a first jaw (310) and a second jaw (320), the first jaw (310) movably connected to the second jaw (320), the first jaw (310) and the second jaw (320) being capable of moving relatively to each other to implement closure and opening, a mounting cavity being formed between the first jaw (310) and the second jaw (320); and a staple cartridge assembly (400), mounted in the mounting cavity and comprising a staple cartridge base (410) and a firing member (420) arranged at the staple cartridge base (410), the staple cartridge base (410) being provided with a mounting slot (411) where staples are mounted, a firing initial position (401) being away from the mounting slot (411) and a firing end position (402) being close to the mounting slot (411), the transmission mechanism (210) being capable of driving the firing member (420) to move from the firing initial position (401) to the firing end position (402), a first resistance adjustment position and a second resistance adjustment position being provided between the firing initial position (401) and the firing end position (402), an adjustment member being arranged at each of the first resistance adjustment position and the second resistance adjustment position and configured to change a resistance received by the firing member (420) when the firing member (420) passes through each of the first resistance adjustment position and the second resistance adjustment position, wherein the control apparatus is configured to: acquire a driving current of the driving apparatus, and extract, from the driving current, a first current characteristic corresponding to the first resistance adjustment position and a second current characteristic corresponding to the second resistance adjustment position; and determine a type of the staple cartridge assembly (400) according to the first current characteristic and the second current characteristic, or determine a driving mode applied by the driving apparatus to the transmission mechanism (210) according to the first current characteristic and the second current characteristic.
  2. The surgical instrument of claim 1, wherein for different types of staple cartridge assemblies (400), resistances generated to the firing member (420) at the first resistance adjustment position and/or the second resistance adjustment position are different; each of the first current characteristic and the second current characteristic comprises a plurality of consecutive current values, the control apparatus configured to determine a type of the staple cartridge assembly (400) according to the first current characteristic and the second current characteristic, comprises: the control apparatus configured to: determine a first characteristic value according to a range within which a current peak value or an average current value in the first current characteristic falls; determine a second characteristic value according to a range within which a current peak value or an average current value in the second current characteristic falls; and determine the type of the staple cartridge assembly (400) according to a combination of the first characteristic value and the second characteristic value.
  3. The surgical instrument of claim 1, wherein the adjustment member is a protrusion (500) arranged on the staple cartridge base (410).
  4. The surgical instrument of claim 3, wherein the firing member (420) is provided with a groove (600) matched with the protrusion (500).
  5. The surgical instrument of claim 3, wherein for different types of staple cartridge assemblies (400), at least one of the following conditions is met: the protrusion (500) at the first resistance adjustment position is different in shape, length or thickness; or the protrusion (500) at the second resistance adjustment position is different in shape, length or thickness.
  6. The surgical instrument of claim 1, wherein the adjustment member is a groove arranged in the staple cartridge base (410), and the firing member (420) is provided with a protrusion matched with the groove.
  7. The surgical instrument of claim 4, wherein for different types of staple cartridge assemblies (400), at least one of the following conditions is met: the protrusion (500) at the first resistance adjustment position is different in shape, length or thickness; the protrusion (500) at the first resistance adjustment position matched with the groove (600) is different in number; the protrusion (500) at the second resistance adjustment position is different in shape, length or thickness; or the protrusion (500) at the second resistance adjustment position matched with the groove (600) is different in number.
  8. The surgical instrument of claim 4, wherein the firing member (420) comprises a slider (421) and a cutting knife (422), one end of the cutting knife (422) is connected to the slider (421), and the other end of the cutting knife (422) is connected to the transmission mechanism (210); the groove (600) is arranged in the slider (421) or the cutting knife (422).
  9. The surgical instrument of claim 6, wherein the firing member (420) comprises a slider (421) and a cutting knife (422), one end of the cutting knife (422) is connected to the slider (421), and the other end of the cutting knife (422) is connected to the transmission mechanism (210); the protrusion is arranged on the slider (421) or the cutting knife (422).
  10. The surgical instrument of claim 1, wherein for different types of staple cartridge assemblies (400), at least one of the following conditions is met: a distance between the first resistance adjustment position and the firing initial position (401) is different; a distance between the second resistance adjustment position and the firing initial position (401) is different; or a distance between the first resistance adjustment position and the second resistance adjustment position is different.
  11. The surgical instrument of claim 10, wherein each of the first current characteristic and the second current characteristic comprises a plurality of consecutive current values, the control apparatus configured to determine a type of the staple cartridge assembly (400) according to the first current characteristic and the second current characteristic, comprises any one of: the control apparatus configured to: determine the type of the staple cartridge assembly (400) according to a time interval between a current peak value in the first current characteristic and a current peak value in the second current characteristic; or determine the type of the staple cartridge assembly (400) according to a first time period corresponding to the firing member (420) starting to move until reaching a current peak value in the first current characteristic, and a second time period corresponding to the firing member (420) starting to move until reaching a current peak value in the second current characteristic.
  12. A surgical instrument, comprising: a handle assembly (100), comprising a driving apparatus and a control apparatus; a tube assembly (200), of which an end is connected to the handle assembly (100), the tube assembly (200) comprising a transmission mechanism (210) connected to the driving apparatus; a jaw assembly (300), to which another end of the tube assembly (200) is connected, the jaw assembly (300) comprising a first jaw (310) and a second jaw (320), the first jaw (310) movably connected to the second jaw (320), the first jaw (310) and the second jaw (320) being capable of moving relatively to each other to implement closure and opening, a mounting cavity being formed between the first jaw (310) and the second jaw (320); and a staple cartridge assembly (400), mounted in the mounting cavity and comprising a staple cartridge base (410) and a firing member (420) arranged at the staple cartridge base (410), the staple cartridge base (410) provided with a mounting slot (411) where staples are mounted, a firing initial position (401) away from the mounting slot (411) and a firing end position (402) close to the mounting slot (411), the transmission mechanism (210) being capable of driving the firing member (420) to move from the firing initial position (401) to the firing end position (402), at least one resistance adjustment position being provided between the firing initial position (401) and the firing end position (402), an adjustment member being arranged at the resistance adjustment position and configured to change a resistance received by the firing member (420) when the firing member (420) passes through the resistance adjustment position, wherein the control apparatus is configured to: acquire a driving current of the driving apparatus, and extract, from the driving current, current characteristic(s) corresponding to the at least one resistance adjustment position; and determine a type of the staple cartridge assembly (400) according to the current characteristic(s), or determine a driving mode applied by the driving apparatus to the transmission mechanism (210) according to the current characteristic(s).
  13. The surgical instrument of claim 12, wherein for different types of staple cartridge assemblies (400), the resistance adjustment position is different in number, the control apparatus configured to determine a type of the staple cartridge assembly (400) according to the current characteristic(s), comprises: the control apparatus configured to: determine the type of the staple cartridge assembly (400) according to the number of the current characteristic(s).
  14. A surgical instrument, comprising: a handle assembly (100), comprising a driving apparatus and a control apparatus; a tube assembly (200), of which an end is connected to the handle assembly (100), the tube assembly (200) comprising a transmission mechanism (210) connected to the driving apparatus; a jaw assembly (300), to which another end of the tube assembly (200) is connected, the jaw assembly (300) comprising a first jaw (310) and a second jaw (320), the first jaw (310) movably connected to the second jaw (320), the first jaw (310) and the second jaw (320) being capable of moving relatively to each other to implement closure and opening, a mounting cavity being formed between the first jaw (310) and the second jaw (320); and a staple cartridge assembly (400), mounted in the mounting cavity and comprising a staple cartridge base (410) and a firing member (420) arranged at the staple cartridge base (410), the staple cartridge base (410) provided with a mounting slot (411) where staples are mounted, a firing initial position (401) away from the mounting slot (411) and a firing end position (402) close to the mounting slot (411), the transmission mechanism (210) being capable of driving the firing member (420) to move from the firing initial position (401) to the firing end position (402), a first resistance adjustment position and a second resistance adjustment position being provided between the firing initial position (401) and the firing end position (402), an adjustment member being arranged at each of the first resistance adjustment position and the second resistance adjustment position and configured to change a resistance received by the transmission mechanism (210) when the transmission mechanism (210) passes through each of the first resistance adjustment position and the second resistance adjustment position, wherein the control apparatus is configured to: acquire a driving current of the driving apparatus, and extract, from the driving current, a first current characteristic corresponding to the first resistance adjustment position and a second current characteristic corresponding to the second resistance adjustment position; and determine a type of the staple cartridge assembly (400) according to the first current characteristic and the second current characteristic, or determine a driving mode applied by the driving apparatus to the transmission mechanism (210) according to the first current characteristic and the second current characteristic.
  15. A surgical instrument, comprising: a handle assembly (100), comprising a driving apparatus and a control apparatus; a tube assembly (200), of which an end is connected to the handle assembly (100), the tube assembly (200) comprising a transmission mechanism (210) connected to the driving apparatus; a jaw assembly (300), to which another end of the tube assembly (200) is connected, the jaw assembly (300) comprising a first jaw (310) and a second jaw (320), the first jaw (310) movably connected to the second jaw (320), the first jaw (310) and the second jaw (320) being capable of moving relatively to each other to implement closure and opening, a mounting cavity being formed between the first jaw (310) and the second jaw (320); and a staple cartridge assembly (400), mounted in the mounting cavity and comprising a staple cartridge base (410) and a firing member (420) arranged at the staple cartridge base (410), the staple cartridge base (410) provided with a mounting slot (411) where staples are mounted, a firing initial position (401) away from the mounting slot (411) and a firing end position (402) close to the mounting slot (411), the transmission mechanism (210) being capable of driving the firing member (420) to move from the firing initial position (401) to the firing end position (402), at least one resistance adjustment position being provided between the firing initial position (401) and the firing end position (402), an adjustment member being arranged at the resistance adjustment position and configured to change a resistance received by the transmission mechanism (210) when the transmission mechanism (210) passes through the resistance adjustment position, wherein the control apparatus is configured to: acquire a driving current of the driving apparatus, and extract, from the driving current, current characteristic(s) corresponding to the at least one resistance adjustment position; and determine a type of the staple cartridge assembly (400) according to the current characteristic(s), or determine a driving mode applied by the driving apparatus to the transmission mechanism (210) according to the current characteristic(s).

Description

TECHNICAL FIELD The application relates to the technical field of medical devices, and in particular to a surgical instrument. BACKGROUND During a surgery, a clinical doctor may cut and suture a patient's tissue by using a surgical suture instrument. The surgical suture instrument may include a staple cartridge, and staples in the staple cartridge are deployed into the patient's tissue by a firing driving apparatus, to implement suture. In an actual clinical operation, it needs to select different types of staple cartridges with different staple heights according to characteristics of the patient's tissue. If the type of the staple cartridge cannot be known when the surgical suture instrument performs firing cutting and suture, final cutting and suture effects may be affected. At present, identification of the staple cartridge is usually achieved by using a smart chip, sensor, wireless identity (ID) identification system or the like on the market. Since implementation of layout of the sensor requires electrical wiring, it results in difficulty of wiring inside a narrow tube. Another important reason is that waterproof and anticorrosion of the wiring cannot be implemented when the wiring passes through moving joints. Once water stains or dirts enter the wiring, it may result in blockage of an electrical circuit and thus may affect identification of the staple cartridge, finally resulting in loss of functions, affecting an effect of the surgery performed by the clinical doctor, and even resulting in a medical accident. Therefore, how to implement identification of the staple cartridge in the surgical suture instrument safely and reliably and ensure the suture effect by using an appropriate driving mode for a driving apparatus of the staple cartridge, has become an urgent problem to be solved. SUMMARY The following is an overview of the subject matter described in detail in the application. This overview is not intended to limit the scope of protection of the claims. Embodiments of the application provide a surgical instrument, the surgical instrument is capable of implementing identification of a staple cartridge assembly safely and reliably and ensuring the suture effect of the patient's tissue. According to an aspect, an embodiment of the application provides a surgical instrument, the surgical instrument includes a handle assembly, a tube assembly, a jaw assembly, and a staple cartridge assembly. The handle assembly includes a driving apparatus and a control apparatus. An end of the tube assembly is connected to the handle assembly, the tube assembly includes a transmission mechanism connected to the driving apparatus. Another end of the tube assembly is connected to the jaw assembly, the jaw assembly includes a first jaw and a second jaw, the first jaw is movably connected to the second jaw, the first jaw and the second jaw are capable of moving relatively to each other to implement closure and opening, a mounting cavity is formed between the first jaw and the second jaw. The staple cartridge assembly is mounted in the mounting cavity, the staple cartridge assembly includes a staple cartridge base and a firing member arranged at the staple cartridge base, the staple cartridge base is provided with a mounting slot where staples are mounted, a firing initial position away from the mounting slot and a firing end position close to the mounting slot, the 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, an adjustment member is arranged at each of the first resistance adjustment position and the second resistance adjustment position and is configured to change a resistance received by the firing member when the firing member passes through each of the first resistance adjustment position and the second resistance adjustment position. The control apparatus is configured to: acquire a driving current of the driving apparatus, and extract, from the driving current, a first current characteristic corresponding to the first resistance adjustment position and a second current characteristic corresponding to the second resistance adjustment position; anddetermine a type of the staple cartridge assembly according to the first current characteristic and the second current characteristic, or determine a driving mode applied by the driving apparatus to the transmission mechanism according to the first current characteristic and the second current characteristic. In an embodiment of the application, for different types of staple cartridge assemblies, resistances generated to the firing member at the first resistance adjustment position and/or the second resistance adjustment position may be different; each of the first current characteristic and the second current characteristic inclu