CN113017737B

CN113017737B - Electric anastomat capable of detecting percussion resistance

Info

Publication number: CN113017737B
Application number: CN201911378042.8A
Authority: CN
Inventors: 李学军; 赵博; 张晋辉; 代立军; 赵延瑞
Original assignee: BEIJING BIOSIS HEALING BIOLOGICAL TECHNOLOGY CO LTD
Current assignee: BEIJING BIOSIS HEALING BIOLOGICAL TECHNOLOGY CO LTD
Priority date: 2019-12-25
Filing date: 2019-12-27
Publication date: 2022-06-24
Anticipated expiration: 2039-12-27
Also published as: CN113017736B; CN113017735A; CN113017738A; WO2021128088A1; CN113017738B; CN113017737A; CN113017736A; CN113017735B

Abstract

The invention provides an electric anastomat capable of detecting firing resistance, which comprises: the firing mechanism comprises a screw rod, a screw rod sleeve and a firing rod, the firing rod is connected to the screw rod sleeve, the screw rod sleeve is sleeved on the screw rod, the screw rod sleeve can be driven to move along the front-back direction through the rotation of the screw rod, and therefore the firing rod moves along the front-back direction along with the screw rod sleeve; the pressure sensor is positioned at the rear end of the firing rod, and when the firing rod is subjected to resistance in forward movement, the firing rod transmits force to the pressure sensor. Through adopting above-mentioned technical scheme, set up pressure sensor at the rear end of firing bar to detect the resistance that receives when electronic anastomat fires, can judge the thickness of tissue through the resistance, thereby the doctor can judge the pathological change condition of tissue.

Description

Electric anastomat capable of detecting percussion resistance

Technical Field

The invention relates to the field of medical instruments, in particular to an intelligent electrically-driven surgical instrument, and particularly relates to an intelligent electric anastomat.

Background

The electric anastomat is used for minimally invasive surgery and can cut pathological tissues and close wound surfaces. In the prior art, the electric anastomat is disposable, so that the use cost is high, and the burden of a patient is heavy. The power source of the existing electric anastomat is mainly a motor, and the anastomat is disposable, so that the quality of the selected motor is poor due to cost consideration, and the fault risk of the electric anastomat is high.

The electric anastomat is driven by a motor, so that the force used when the tissue is cut and the wound of the tissue is closed cannot be sensed, and the thickness of the tissue and even the pathological change condition of the tissue cannot be judged.

According to different practical conditions, the electric anastomat needs to be provided with the nail bins with different lengths, the movement strokes of the firing rod which are not needed to be provided with the nail bins with different lengths are also different, and the existing electric anastomat is matched with the nail bins with specific lengths to be used and cannot replace the nail bins with different lengths.

Disclosure of Invention

Based on the above prior art, the present invention aims to propose an electric stapler to achieve at least one of the following objects.

At least one part of the electric anastomat can be repeatedly used, so that the use cost of the electric anastomat is reduced.

When the electric anastomat is used, parameters such as resistance force received when the electric anastomat is fired are detected, and therefore the pathological condition of the tissue is known.

The use safety of the electric anastomat is improved.

The same electric anastomat can be matched with nail bins with different lengths for use, so that the equipment models are reduced or the use cost is reduced.

When the electric stapler is used, a parameter such as blood oxygen saturation is detected, and thus a lesion state of the tissue is known.

The invention provides in a first aspect an electric stapler with a detachable power module, comprising:

a body capable of cutting tissue and firing staples to close a wound surface for hemostasis, the body having an interface plate;

the power module can be detachably connected to the main body and comprises a control unit, the power module further comprises a motor and/or a battery assembly, and when the main body and the power module are connected together, the control unit is electrically connected with the interface board.

Preferably, the power module is provided with a case bracket protruding from a surface of the power module, the case bracket being at least partially inserted into the main body in a state where the main body and the power module are coupled together.

Preferably, the interface board is provided with a power module connection detection switch, and the housing bracket can trigger the power module connection detection switch in a state where the main body and the power module are connected together.

Preferably, the shell support is provided with a locking groove, the main body is provided with a plug lock assembly, and the locking groove can be matched with the plug lock assembly to connect and lock the power module and the main body.

Preferably, the power module includes the motor, and the motor and the main body are connected through a transmission mechanism in a state where the main body and the power module are connected together.

Preferably, the power module is located at a rear side of the main body.

Preferably, the bottom of the main body is provided with a handle, and the power module is positioned below the handle or is at least a part of the handle.

Preferably, the power module comprises a power module body and a power module housing, the module body being mounted within the power module housing.

Preferably, the power module housing comprises:

a rear case capable of at least partially housing the power module body, the power module body including the motor and the control unit;

the front shell is provided with a patch panel and a coupler, the coupler can be rotatably installed on the front shell, an output shaft of the motor is connected with the coupler, and the control unit is connected with the patch panel.

Preferably, the front shell is provided with a bolt, the bolt comprises a first bolt and a second bolt which can move along a first direction and a third bolt which can move along a second direction, the first bolt and the second bolt are matched with the third bolt through inclined planes, so that when the third bolt moves along the second direction, the first bolt and the second bolt correspondingly move along the first direction, and the first direction and the second direction are perpendicular to each other.

In a second aspect, the present invention provides a power module housing for an electric stapler, the power module housing comprising:

a rear housing configured to at least partially house a power module body for the electric stapler, the power module body including a motor and a control unit;

the front shell is provided with an adapter plate and a coupler, the coupler can be rotatably installed on the front shell, an output shaft of the motor can be connected with the coupler in a torsion-resistant mode, and the control unit can be connected with the adapter plate.

A third aspect of the present invention provides an electric stapler capable of detecting a firing resistance, the electric stapler including:

the firing mechanism comprises a screw rod, a screw rod sleeve and a firing rod, the firing rod is connected to the screw rod sleeve, the screw rod sleeve is sleeved on the screw rod, the screw rod sleeve can be driven to move along the front-back direction through the rotation of the screw rod, and therefore the firing rod moves along the front-back direction along with the screw rod sleeve;

the pressure sensor is positioned at the rear end of the firing rod, and when the firing rod is subjected to resistance in forward movement, the firing rod transmits force to the pressure sensor.

Preferably, the screw rod sleeve is provided with an accommodating groove, the end parts of the pressure sensor and the firing rod are embedded into the accommodating groove, and the pressure sensor is located between the bottom of the accommodating groove and the end part of the firing rod.

Preferably, the electric anastomat is provided with an interface board, the interface board is provided with a sensor interface, and the pressure sensor is electrically connected with the sensor interface.

Preferably, the powered stapler includes jaws provided with an oximetry sensor electrically connected to the sensor interface.

Preferably, the screw rod sleeve is provided with a pin inserted into the screw rod sleeve, and the end of the pin is positioned in a gap between threads of the screw rod, so that the pin is matched with the threads.

Preferably, the electric stapler includes:

a body, the body comprising: the interface board is provided with a power module connection detection switch; and the firing mechanism;

Preferably, the power module includes the motor, and the motor and the lead screw are connected through a transmission mechanism in a state where the main body and the power module are connected together.

Preferably, the electric stapler further comprises:

the return switch is used for controlling the movement of the firing rod; and

the return sliding block is arranged in a mode of sliding along the front-back direction and can trigger the return switch when sliding along the front-back direction;

the trigger rod is provided with a first trigger surface and a trigger mounting portion, the first trigger surface faces the front side, when the trigger rod moves forwards and reaches a first preset position, the first trigger surface triggers the return slider, the trigger mounting portion is located in front of the first trigger surface, a trigger can be mounted in the trigger mounting portion, and the trigger can trigger the return slider when the trigger rod reaches a second preset position.

Preferably, the trigger mounting part is a groove which partially surrounds the circumference of the firing rod or forms an annular groove around the firing rod.

Preferably, the trigger mounting portion is a hole or opening.

Preferably, the return slider is connected with a return push button, and the return push button is exposed from the surface of the main body of the electric stapler, so that the return slider can trigger the return switch by pushing the return push button.

In a fourth aspect, the present invention provides an electric stapler having a return control function, including:

the firing mechanism comprises a firing rod, and the firing rod can move along the front and back directions of the electric anastomat;

the return switch is used for controlling the movement of the firing rod; and

the trigger rod is provided with a first trigger surface and a trigger mounting portion, the first trigger surface faces the front side, when the trigger rod moves forwards and reaches a first preset position, the first trigger surface can trigger the return sliding block, the trigger mounting portion is located in front of the first trigger surface, a trigger can be mounted in the trigger mounting portion, and the trigger can trigger the return sliding block when the trigger rod reaches a second preset position.

Preferably, the trigger mounting portion is a hole or opening.

Preferably, the trigger mounting groove is spaced from the first trigger surface by a distance of 10 mm to 50 mm.

Preferably, the firing bar is further provided with a second trigger surface located in front of the trigger mounting slot, the second trigger surface facing rearward, the second trigger surface being capable of triggering the return slide when the firing bar moves rearward and reaches a third predetermined position.

Preferably, the firing mechanism further comprises a screw rod and a screw rod sleeve, the firing rod is connected to the screw rod sleeve, the screw rod sleeve is sleeved on the screw rod, the screw rod sleeve can be driven to move along the front-back direction through the rotation of the screw rod, and therefore the firing rod moves along the front-back direction along with the screw rod sleeve;

the electric anastomat further comprises a pressure sensor, the pressure sensor is located at the rear end of the firing rod, and when resistance is applied to forward movement of the firing rod, the firing rod transmits force to the pressure sensor.

Preferably, the electric anastomat is provided with an interface board, the return switch is arranged on the interface board, the interface board is provided with a sensor interface, and the pressure sensor is electrically connected with the sensor interface.

Preferably, the electric stapler includes:

a body comprising the firing mechanism;

the power module can be detachably connected to the main body and comprises a control unit and a motor and/or a battery assembly, and the control unit is electrically connected with the interface board.

Preferably, the front end of the electric anastomat is provided with a jaw, and the jaw is provided with a replaceable nail bin.

The fifth aspect of the present invention provides a detachable electric stapler capable of measuring a blood oxygen saturation level, the electric stapler including:

the main body comprises a jaw closing mechanism, the main body is provided with an interface board, the jaw closing mechanism comprises a jaw, the jaw is arranged at the front end of the main body, and the jaw is provided with an oxygen saturation degree sensor;

Preferably, the jaw is provided with a staple anvil and a staple cartridge, the oximetry sensor being connected to the staple anvil and/or the staple cartridge.

Preferably, the blood oxygen saturation sensor is a reflective blood oxygen saturation sensor or a transmissive blood oxygen saturation sensor.

Preferably, the transmissive oximetry sensor includes a transmitting end and a receiving end disposed on the staple anvil and the staple cartridge, respectively.

Preferably, the jaw closing mechanism comprises a connecting block and a firing rod sleeve, the connecting block is sleeved on the firing rod sleeve and can move along the firing rod sleeve in the front-back direction, the connecting block moves forwards to close the jaws, and the connecting block moves backwards to open the jaws.

Preferably, the oximetry sensor is electrically connected to the interface board by a lead disposed at the firing bar sleeve.

Preferably, the oximetry sensor is provided with a plurality of electrical contacts by which the oximetry sensor is electrically connected with the interface board by connecting with leads provided at the firing bar sleeve.

Preferably, the jaw is openable in an up-down direction, and the jaw is swingable in a left-right direction.

Preferably, the power module is located at a rear side of the main body.

By adopting the technical scheme, at least one of the following beneficial effects can be obtained.

(i) The control unit of the electric stapler and at least one of the motor and the battery can be detached from the main body, and the detached portion can be reused by being sterilized or by replacing a disposable sterile power module housing, thereby reducing the use cost of the electric stapler.

(ii) The rear end of the firing rod is provided with a pressure sensor, so that the resistance received by the electric anastomat during firing is detected, the thickness of the tissue can be judged through the resistance, and the doctor can judge the pathological change condition of the tissue.

(iii) The electric anastomat has a return function, and the use safety is improved.

(iv) The trigger rod is provided with a groove capable of installing the trigger piece, the trigger piece is installed in the groove or detached from the groove, the same electric anastomat can be matched with nail bins with different lengths to be used through simple adjustment, the application range of the electric anastomat is enlarged, and the use cost of the burden of a patient is reduced.

(v) By installing a blood oxygen saturation sensor at the jaw, the blood oxygen saturation of the tissue can be measured, and a doctor can judge the pathological condition of the tissue through the blood oxygen saturation.

(vi) Most of the existing anastomats apply power by operating a manual grab handle, the force is limited, and a pulse type power mode is presented, so that mucosa layers are separated, fall off and curled. The electric anastomat is used, the anastomat is accurately pushed to perform percussion motion through the motor, so that larger thrust can be obtained, and percussion power can be kept continuous, so that complications of sticking surgery are avoided.

Drawings

Fig. 1 shows a schematic structural view of a motorized stapler according to the present invention.

Fig. 2 shows an exploded view of a powered stapler according to the invention.

Fig. 3 shows an exploded view of another angle of the powered stapler according to the invention.

Fig. 4 shows a schematic view of the powered stapler according to the invention with the power module removed.

Fig. 5 shows a cross-sectional view along the line a-a in fig. 4.

Fig. 6 shows a close-up view of the powered stapler according to the present invention with the power module and main housing removed.

Fig. 7 shows another enlarged partial view of the electric stapler according to the present invention with the power module and the main housing removed.

Fig. 8 shows a partially enlarged view of the electric stapler according to the present invention with the main housing removed.

Fig. 9 shows a partially enlarged view of the portion C in fig. 8.

Fig. 10 shows a schematic view of the cartridge of the electric stapler according to the present invention.

Fig. 11 shows an exploded view of the power module of the powered stapler according to the invention.

Fig. 12 shows a schematic structural view of a power module of the electric stapler according to the present invention.

Fig. 13 shows a cross-sectional view taken along line B-B of fig. 12.

Fig. 14 shows a cross-sectional view of a power module housing of a power module of the electric stapler according to the present invention.

Fig. 15 shows an exploded view of the power module housing of the power module of the electric stapler according to the present invention.

FIG. 16 shows a partial schematic of the firing mechanism of the powered stapler according to the invention.

FIG. 17 illustrates a partial structural view of a firing mechanism of a powered stapler in accordance with another embodiment of the invention.

FIG. 18 illustrates a partial structural schematic of a firing mechanism of a powered stapler in accordance with yet another embodiment of the invention.

Description of the reference numerals

1 main casing 11

12 jaw closure mechanism 121 handle 121a first press-contact fitting part 122a reset button 122a second press-contact fitting part 122b third press-contact fitting part 123 reset button safety 124a fourth press-contact fitting part 124b fifth press-contact fitting part 125 reset button safety reset spring 126 connecting block 128 firing bar sleeve 129 jaw

13 firing mechanism 131 screw 132 screw rod cover 132a pressure sensor 132b receiving slot 133 firing rod 133a first trigger surface 133b second trigger surface 133c slot 134 trigger 135 trigger return spring 136 trigger safety 137a return slide block 137a return push button 138 firing block 139 pin

14 interface board 141 trigger switch 142 jaw closure detection switch 143 power module connection detection switch 144 return switch 145 electrical connector

15 support

16 cell assembly

17 plug lock assembly 171 lock button 172 lock spring

181-anvil 182-staple-cartridge 183 oxyhemoglobin saturation sensor

2 Power Module

21 power module body 211 motor 212 motor support 213 control unit 214 control unit connector

22 power module casing 221 rear shell 221a mounting slot 221b removal button 222 front shell 222a front shell panel 222b front shell cover plate 223 coupling 224 casing bracket 224a positioning slot 224b locking slot 225 adaptor plate 226 first plug 227 second plug 228 third plug 229 plug spring

F front-back direction W right-left direction.

Detailed Description

Exemplary embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the detailed description is intended only to teach one skilled in the art how to practice the invention, and is not intended to be exhaustive or to limit the scope of the invention.

If not specifically stated, the front-back direction F refers to the front-back direction of the electric stapler, the front refers to the end pointing to the patient when the electric stapler is used, and the back refers to the end pointing to the operator when the electric stapler is used; the left-right direction W refers to the left-right direction of the electric stapler, the left refers to the left side of the operator, and the right refers to the right side of the operator.

As shown in fig. 1 to 17, the present invention provides an electric stapler including a main body 1 and a power module 2, wherein the main body 1 and the power module 2 are detachably connected. The electric anastomat is a medical surgical instrument, the main body 1 can be used for one time, a new main body 1 can be used in each operation, and the power module 2 can be used for repeated sterilization.

The main body 1 includes a housing 11, a jaw closure mechanism 12, a firing mechanism 13, an interface board 14, a bracket 15, and a battery assembly 16. A bracket 15 is disposed within the housing 11, the bracket 15 being configured to support components mounted within the housing 11, such as the jaw closing mechanism 12, the firing mechanism 13, and/or the interface board 14.

As shown in fig. 3 and 6, the interface board 14 is connected to the bracket 15, for example, the interface board 14 is located above the bracket 15. The interface board 14 is provided with an electrical connector 145, a power interface, a sensor interface and a plurality of switches. The plurality of switches include, for example, a firing switch 141, a jaw closure detection switch 142, a power module 2 connection detection switch 143, and a return switch 144, which can be located below the interface board 14 to facilitate activation of the switches by components located below the interface board 14. The electrical connector 145 may be a blade connector, and the main body 1 and the power module 2 may be electrically connected through the electrical connector 145.

As shown in fig. 1-4, the jaw closure mechanism 12 includes a grip 121, a reset button 122, a reset button return spring 123, a reset button safety 124, a reset button safety return spring 125, a linkage 126, a connecting block 127, a firing bar sleeve 128, and jaws 129.

The handle 121 is rotatably connected to the frame 15, the firing bar sleeve 128 is fixedly connected to the frame 15, the firing bar sleeve 128 extends in a front-to-back direction, and the connecting block 127 is sleeved on the firing bar sleeve 128 such that the connecting block 127 can move back and forth along the firing bar sleeve 128. One end of the link 126 is hinged to the grip 121, and the other end of the link 126 is hinged to the connecting block 127. A jaw 129 is provided at the front end of the firing bar sleeve 128, the jaw 129 can be opened in the up-down direction, and the jaw 129 can be swung in the left-right direction W. Rotation of the handle grip 121 may drive the linkage block 127 via the linkage 126 back and forth along the firing bar sleeve 128, which may cause the jaws 129 to close when the linkage block 127 is moved forward, and the handle grip 121 may trigger the jaw closure detection switch 142. Movement of the connecting block 127 rearwardly opens the jaws 129 so that the grip 121 no longer triggers the jaw closure detection switch 142.

The reset button 122 may be rotatably coupled to the bracket 15, and a reset button reset spring 123 may be disposed in front of the reset button 122, the reset button reset spring 123 being a compression spring. The return button return spring 123 has one end abutting against the holder 15 and the other end abutting against the return button 122. The reset button return spring 123 causes the reset button 122 to have a tendency to swing back, i.e., the reset button 122 has a tendency to swing in a clockwise direction when viewed from left to right.

As shown in fig. 3 and 5, the grip 121 is provided with a first pressing and matching portion 121a, the reset button 122 is provided with a second pressing and matching portion 122a, and the first pressing and matching portion 121a and the second pressing and matching portion 122a are at least partially located in the same vertical plane. When the jaw 129 is opened as viewed from right to left, the first abutting engagement portion 121a and the second abutting engagement portion 122a contact each other in the rotation direction of the reset button 122, and the first abutting engagement portion 121a blocks the reset button 122 from swinging in the counterclockwise direction. When the grip 121 is gripped, the grip 121 is rotated clockwise, so that the second abutting engagement portion 122a and the first abutting engagement portion 121a are displaced in the rotational direction of the reset button 122. The reset button 122 rotates counterclockwise under the action of the reset button reset spring 123, so that the second pressing and matching part 122a abuts against the first pressing and matching part 121a, and at this time, the handle 121 cannot rotate (counterclockwise). That is, after the grip 121 is gripped to close the jaw 129, the second abutting portion 122a abuts against the first abutting portion 121a, so that the grip 121 cannot rotate counterclockwise, and the grip 121 is prevented from returning to the initial position to open the jaw 129 again.

The first abutting portion 121a and the second abutting portion 122a can be displaced in the rotational direction of the grip 122 by rotating the reset button 122, and the grip 121 can be returned to the initial position. It is also desirable to prevent inadvertent operation of the reset button 122 to return the grip 121 to the initial position to reopen the jaws 129 during firing after the jaws 129 have been closed.

As shown in fig. 6, the reset button fuse 124 is hinged to the bracket 15 at a substantially middle position, and the reset button fuse 124 may be disposed at the rear of the reset button 122. The reset button safety return spring 125 is an extension spring, and one end of the reset button safety return spring 125 is connected to the bracket 15 and the other end is connected to the reset button safety 124. The reset button fuse 124 is caused to have a tendency to swing in a counterclockwise direction when viewed from left to right. The reset button 122 is provided with a third press-fitting portion 122b, the reset button fuse 124 is provided with a fourth press-fitting portion 124a and a fifth press-fitting portion 124b, and the fourth press-fitting portion 124a and the fifth press-fitting portion 124b may be located at both end portions of the reset button fuse 124.

As shown in fig. 6, the reset button fuse return spring 125 has a tendency to rotate the reset button fuse 124 in a counterclockwise direction when viewed from left to right. When the jaws 129 are closed, the reset button fuse return spring 125 holds the fourth press fit portion 124a of the reset button fuse 124 behind the third press fit portion 122b, blocking the reset button 122 from rotating in the counterclockwise direction. The fifth press-fit portion 124b is located behind the screw rod sleeve 132, and when the screw rod sleeve 132 moves to the rear end of the screw rod 131, the screw rod sleeve 132 presses against the fifth press-fit portion 124b, so that the reset button fuse 124 overcomes the elastic force of the reset button fuse reset spring 125, and the reset button fuse 124 rotates clockwise. The fourth press-fit portion 124a of the reset button fuse 124 may be staggered from the third press-fit portion 122b to enable the reset button 122 to rotate in a counterclockwise direction.

1-4, the firing mechanism 13 includes a lead screw 131, a lead screw sleeve 132, a firing bar 133, a trigger 134, a trigger return spring 135, a trigger safety 136, a return slide 137, and a firing block 138.

The screw 131 is rotatably connected to the bracket 15, and the screw 131 is connected to an output shaft of a motor 211 (see fig. 11) of the power module 2 through a transmission mechanism, for example, through a coupling 223 (see fig. 15) or through a gear engagement, so that the motor 211 can drive the screw 131 to rotate. The screw rod sleeve 132 is sleeved on the screw rod 131, the screw rod sleeve 132 is provided with a hole, a pin 139 is inserted into the hole and connected to the screw rod sleeve 132, and the end part of the pin 139 is positioned in the gap between the threads of the screw rod 131. The screw boss 132 is provided with a convex rib, and the holder 15 is provided with a groove extending in the axial direction of the screw 131, into which the rib is fitted. When the screw 131 rotates, the screw sleeve 132 can be driven to move back and forth in the axial direction of the screw 131 by the engagement of the pin 139 with the screw. It will be appreciated that the pin 139 is easily machined to a high degree of precision, so that the clearance between the pin 139 and the thread is small and the movement of the lead screw sleeve 132 driven by the lead screw 131 is highly precise.

The screw sleeve 132 is provided with a pressure sensor 132a, the pressure sensor 132a is located behind the firing bar 133, and the firing bar 133 transmits force to the pressure sensor 132a when resistance is applied to the firing of the firing bar 133. The resistance that firing bar 133 received can be detected through pressure sensor 132a, and the size of resistance can be relevant with the thickness of tissue or pathological change, and the resistance that receives when detecting the percussion can have more comprehensive understanding to the closed condition of wound. The pressure sensor 132a is electrically connected to the sensor interface, and can supply power to the pressure sensor 132a and transmit signals, so that the pressure value can be read and displayed in real time.

As shown in fig. 16, the wire rod sleeve 132 is provided with a receiving groove 132b capable of receiving at least an end portion of the firing rod 133, a part of a cross section of the receiving groove 132b may be T-shaped, and fitting the end portion of the firing rod 133 into the receiving groove 132b may limit a movable range of the firing rod 133 with respect to the wire rod sleeve 132 in the front-rear direction F. A pressure sensor 132a may also be embedded in the receiving slot 132b, with the pressure sensor 132a being located between the bottom of the receiving slot 132b and the end of the firing bar 133. The firing bar 133 can have a small range of motion in the fore-aft direction F relative to the wire rod sleeve 132 such that the end of the firing bar 133 can press against the pressure sensor 132a located behind the firing bar 133, thereby causing the pressure sensor 132a to output a corresponding pressure signal. A display device may be provided on the electric stapler to display the pressure information, and the pressure signal of the pressure sensor may also be transmitted to other display devices (e.g., medical equipment or a display) to display the pressure information on the display device.

In another possible embodiment, as shown in FIG. 17, the screw sleeve 132 is provided with a receiving slot 132b capable of receiving the end of the firing bar 133, the receiving slot 132b may be T-shaped in cross-section, and the insertion of the end of the firing bar 133 into the receiving slot 132b may secure the firing bar 133 in the forward and rearward direction F. The screw boss 132 is integrated with a pressure sensor 132 a. When the firing bar 133 is resisted from moving forward, the pressure sensor 132a is deformed by force and can output a corresponding pressure signal according to the magnitude of the deformation.

It can be understood that, as shown in fig. 18, even if the screw sleeve 132 is not provided with the pressure sensor 132a, the electric stapler can cut the tissue and close the wound surface normally, and only the resistance of the firing rod 133 when firing can not be detected.

The firing bar 133 is inserted into the firing bar sleeve 128, and the firing bar 133 is coupled to the wire bar sleeve 132 such that the firing bar 133 can move back and forth with the wire bar sleeve 132. Jaw 129 is provided with a staple anvil 181 and a staple cartridge 182, staple cartridge 182 being used to place titanium staples. When the firing bar 133 moves forward, a knife positioned in the jaws 129 can be pushed to cut tissue and fire the titanium staples in the staple cartridge 182, so that the titanium staples close the wound surface to stop bleeding.

Referring also to fig. 10, a blood oxygen saturation sensor 183 is also disposed at the jaw 129, the blood oxygen saturation sensor 183 may be coupled to a front end of the staple cartridge 182, and the blood oxygen saturation sensor 183 may measure the blood oxygen saturation before, during, and/or after surgery.

The blood oxygen saturation refers to the maximum solubility of oxygen in blood, and the blood and oxygen are combined mainly by hemoglobin. And detecting the blood oxygen saturation by adopting a blood oxygen saturation sensor. The hemoglobin concentration and the blood oxygen saturation are calculated by directing a blood oxygen saturation sensor at the selected tissue, measuring the intensity of light reflected through and/or through the tissue using red light, e.g., 660nm wavelength, and near infrared light, e.g., 940nm wavelength, as incident light sources. By monitoring the blood oxygen saturation, the blood oxygen saturation of the tissue can be obtained, the blood transport state of the tissue can be reflected, and the tissue can be judged to be a healthy tissue or a pathological tissue. For example, if the blood oxygen saturation level of the tissue is far lower than that of the healthy tissue, the tissue is considered as the pathological tissue.

According to the spectral characteristics of oxygenated hemoglobin (HbO2) and reduced hemoglobin (Hb) in a red light region (wavelength of 600-700 nm) and an infrared light region (wavelength of 800-1000 nm), the absorption difference of the oxygenated hemoglobin and the reduced hemoglobin in the red light region is very large, and the light absorption degree and the light scattering degree of blood are related to the blood oxygen saturation; in the infrared spectrum, the absorption difference between oxygenated hemoglobin and reduced hemoglobin is large, and the light absorption degree and light scattering degree of blood are mainly related to the content of hemoglobin, so that the absorption spectra are different according to the content of oxygenated hemoglobin and reduced hemoglobin, and the blood oxygen saturation sensor can accurately reflect the blood oxygen saturation of tissues according to the content of oxygenated hemoglobin and reduced hemoglobin.

Referring to fig. 10, an electric stapler using a reflective blood oxygen saturation sensor 183 is provided, and the blood oxygen saturation sensor 183 may be integrally formed with a staple cartridge 182 or an anvil 181 (see fig. 1). When the oximetry sensor 183 is disposed at the staple cartridge 182 or the anvil 181 in an integrated manner, the oximetry sensor 183 may be connected to the interface board 14 by a lead disposed at the firing bar sleeve 128, enabling power supply and data collection of the oximetry sensor. The blood oxygen saturation sensor 183 may also be combined with the staple cartridge 182 or the anvil block 181 in a separate manner. When the oximetry sensor 183 is provided in a separate manner, a plurality of electrical contacts may be provided at the oximetry sensor 183, with the oximetry sensor 183 being connected to the interface board 14 by the plurality of electrical contacts and the lead wires provided at the firing bar sleeve 128.

Alternatively, the blood oxygen saturation sensor 183 may be a transmission type blood oxygen saturation sensor, the transmission type blood oxygen saturation sensor includes a transmitting end and a receiving end, the transmitting end and the receiving end are respectively disposed on the nail anvil block and the nail bin, and the monitoring of the blood oxygen saturation is accomplished by monitoring the transmission intensity of the tissue to the dual-wavelength infrared light.

Further, referring also to FIG. 9, the firing bar 133 is provided with a first trigger surface 133a and a second trigger surface 133 b. The first and

second trigger surfaces

133a and 133b may be formed by machining a radially smaller portion of the firing bar 133 having first and

second trigger surfaces

133a and 133b on opposite ends thereof. The first trigger surface 133a faces the front side, and the second trigger surface 133b faces the rear side.

Referring to fig. 5, 6 and 9, the return slide 137 is slidably disposed in the front-to-back direction F, such as the return slide 137 is sleeved to the firing bar 133 and positioned between the first and

second trigger surfaces

133a and 133 b. When the firing bar 133 moves forward and reaches the first predetermined position, the first trigger surface 133a is used to trigger the return slide 137, which in turn triggers the return switch 144, which turns off the motor 211 to stop the firing bar 133 from advancing or to retract the firing bar 133 by, for example, reversing the motor 211. When the firing bar 133 is retracted rearward and reaches a third predetermined position, the second trigger surface 133b is used to trigger the return slide 137, which in turn triggers the return switch 144 to stop the firing bar 133 from reversing.

The firing bar 133 is further provided with a trigger mount, for example, the trigger mount can be a slot 133c, the slot 133c being located between the first and

second trigger surfaces

133a and 133b, and the slot 133c can partially surround the circumference of the firing bar 133 or form an annular groove around the circumference of the firing bar 133. According to the length of the staple cartridge 182 along the front-back direction F, the distance that the firing bar 133 needs to extend forward is different, the longer staple cartridge 182 needs the firing bar 133 to move forward for firing titanium staples (staples), and the shorter staple cartridge 182 needs the distance that the firing bar 133 moves forward to be correspondingly shortened. By embedding a trigger, such as a snap ring, in the slot 133c, when the firing bar 133 moves forward and reaches a second predetermined position, the snap ring will trigger the return slide 137, and thus the return switch 144, to turn off the motor 211 to stop the firing bar 133 from advancing. The return sled 137 is triggered by the first trigger surface 133a such that the forward travel distance of the firing bar 133 is reduced for use with a shorter staple cartridge 182. The same electric anastomat can be matched with the nail bins 182 with different lengths for use through simple adjustment, and the application range of the electric anastomat is enlarged. The distance between the groove 133c and the first trigger surface 133a may be 10 mm to 50 mm, for example, the staple cartridge 182 may have a length of both 45 mm and 60 mm, and the distance between the groove 133c and the first trigger surface 133a is 15 mm. The slot receives the trigger when a cartridge 182 having a length of 45 mm is used, and the slot does not receive the trigger when a cartridge 182 having a length of 60 mm is used. The slot 133c may also be replaced by a hole or opening in which a corresponding pin or other triggering member is disposed to form a triggering surface that triggers the return slide 137.

To avoid failure of the electric stapler to retract the firing bar 133, the firing bar 133 may also have a manually controlled retraction feature. The return slide 137 is connected to a return push button 137a (see fig. 3), the return push button 137a is exposed from the surface of the main housing 11, and pushing the return push button 137a causes the return slide 137 to trigger a return switch 144, thereby retracting the firing bar 133.

As shown in FIG. 7, when viewed from right to left, the trigger 134 is hingedly attached to the handle 121, the trigger return spring 135 is an extension spring, and the trigger return spring 135 has one end attached to the frame 15 and the other end attached to the trigger 134. the trigger return spring 135 tends to rotate the trigger 134 in a counterclockwise direction to maintain the trigger 134 in an unfired condition. The firing block 138 is hinged to the frame 15, and when the trigger 134 is pulled, the trigger 134 rotates clockwise and contacts the firing block 138 to rotate the firing block 138 in a counterclockwise direction, and the firing block 138 presses the firing switch 141, and the firing switch 141 can control the motor to rotate.

As shown in FIG. 9, the trigger guard 136 is hingedly attached to the grip 121, with the trigger guard 136 being located on the rear side of the trigger 134. The trigger guard 136 or grip 121 is provided with two holding portions that can hold the trigger guard 136 in place and can switch the trigger guard 136 between the two positions by toggling the trigger guard 136. When the trigger guard 136 is moved to the forward position, it can abut against the trigger 134 to prevent accidental triggering of the trigger 134; the trigger guard 136 will not interfere with the action of the trigger 134 when it is moved to the rearward position.

Referring to fig. 1 to 3 and 7, the main body 1 is provided with a plug lock assembly 17, the plug lock assembly 17 includes a lock knob 171 and a lock spring 172, and the lock spring 172 abuts against the lock knob 171 to make the lock knob 171 have a movement tendency of being inserted into a lock groove 224b (refer to fig. 11). When the power module 2 and the main body 1 are coupled together, the locking spring 172 causes the locking button 171 to be inserted into the locking groove 224b, thereby preventing the power module 2 and the main body 1 from being disengaged. The locking button 171 is partially exposed on the surface of the main casing 11, and the locking button 171 can be manually pushed out of the locking groove 224b, so that the power module 2 can be separated from the main body 1.

Referring to fig. 1 to 3 and 6 to 8, a handle for grasping when operating the electric stapler is provided at the bottom of the main body 1. A battery assembly 16 is attached to the bracket 15, the battery assembly 16 is located at the rear side of the grip 121, and the battery assembly 16 may be a part of the handle or disposed below the handle.

As shown in fig. 11 to 15, the power module 2 includes a power module main body 21 and a power module case 22, and the power module main body 21 is mounted in the power module case 22.

The power module main body 21 includes a motor 211 (which may include a speed reducer), a motor bracket 212, a control unit 213, and a control unit connector 214. The power module case 22 includes a rear case 221 and a front case 222, and the rear case 221 and the front case 222 are connected to form a closed cavity that can accommodate the power module main body 21, and the shape of the cavity is similar to that of the power module main body 21. The power module case 22 can block and isolate contamination such as bacteria, and the front case 222 can transmit electric power and an electric signal, and is provided with a power transmission structure, so that the driving force of the power module 2 is effectively transmitted into the main body 1, and the driving of the electric stapler is completed.

The front case 222 includes a front case panel 222a and a front case cover 222b, and the front case panel 222a and the front case cover 222b are fixedly coupled. The coupling 223 is rotatably coupled to the front case 222, and when the power module 2 is mounted to the main body 1, the coupling 223 is used to couple the output shaft of the motor 211 to the lead screw 131 so that the motor 211 can drive the lead screw 131 to rotate. Specifically, the front shell cover plate 222b is provided with a circular stepped hole, the stepped hole is a through hole, the periphery of the coupler 223 is provided with an annular protrusion, the coupler 223 is inserted into the stepped hole, and the protrusion corresponds to a stepped portion of the stepped hole, so that the coupler 223 is axially limited. The front case panel 222a and the front case cover 222b are connected to each other, and the coupling 223 is rotatably mounted in the stepped hole.

A housing bracket 224 is fixedly attached to the front shell 222, the housing bracket 224 extending forwardly to project from the face of the power module housing 22. The housing bracket 224 is provided with positioning grooves 224a, the positioning grooves 224a extending in the front-rear direction F. When the motor 211 is mounted in the power module case 22, the motor bracket 212 is inserted into the positioning groove 224a, so that it is possible to prevent noise from being generated due to collision between the motor 211 and the power module case 22 due to a gap between the motor 211 and the power module case 22.

When the power module 2 and the main body 1 are connected together, the housing bracket 224 is at least partially inserted into the main body 1, the housing bracket 224 can trigger the power module connection detection switch 143, and the power module connection detection switch 143 can signal that the power module 2 is installed. The housing bracket 224 is provided with a locking groove 224b, and the locking groove 224b can be inserted by the locking button 171 to lock the power module 2 and the main body 1.

The adapter plate 225 is fixedly connected to the front housing 222, and the adapter plate 225 is connected to the control unit 213 via the control unit connector 214. When the power module 2 and the main body 1 are connected together, the adapter plate 225 and the electrical connector 145 form an electrical connection.

The front case cover 222b is provided with grooves for receiving the first, second and

third pins

226, 227 and 228, the grooves guiding the first, second and

third pins

226, 227 and 228, the first and

second pins

226 and 227 being movable in the left-right direction W, and the third pin 228 being movable in the up-down direction, the left-right direction W and the up-down direction being perpendicular to each other. A latch spring 229 is disposed within the recess, the latch spring 229 being a compression spring, the latch spring 229 causing the first latch 226 and the second latch 227 to have a tendency to move away from a centerline of the front housing 222 in the left-right direction W. The first and

second pins

226 and 227 are provided with first inclined surfaces toward the rear case 221, the first inclined surfaces extending more toward the rear side as the first inclined surfaces are more toward the center line of the left-right direction W of the front case 222. When the front case 222 and the rear case 221 are mounted, the front case 222 is inserted into the rear case 221, and the edge of the rear case 221 may press the first slope, thereby compressing the latch spring 229 and retracting the first latch 226 and the second latch 227.

The first and

second pins

226 and 227 are provided with second slopes toward the third pin 228, the second slopes extending more toward the lower side as the second slopes are more toward the center line of the front case 222. The third latch 228 is provided with a third inclined surface engaged with the second inclined surface, and by the engagement of the second inclined surface and the third inclined surface, the first latch 226 and the second latch 227 can move toward the center line of the front case 222 against the elastic force of the latch spring 229 when the third latch 228 moves upward. The rear case 221 is provided with a removal knob 221b, the removal knob 221b may be elastically coupled to the rear case 221 by a rubber ring, the removal knob 221b corresponds to the third latch 228, and pressing the removal knob 221b may move the third latch 228 upward to be retracted from the corresponding mounting groove of the rear case 221, thereby retracting the first latch 226 and the second latch 227 from the corresponding mounting groove of the rear case 221.

The inner side edge position of the rear case 221 is provided with a mounting groove 221a, and the front case 222 and the rear case 221 are coupled by partially inserting the first and

second pins

226 and 227 into the mounting groove 221 a.

It can be understood that the surgical instruments in the operation need to be sterilized or disposable instruments, and the anastomats in the prior art, both electric anastomats and traditional manual anastomats, are disposable instruments, particularly electric anastomats, and are high in disposable cost. Moreover, as a disposable electric anastomat, high-quality motors with high indexes cannot be selected necessarily due to the consideration of economy, service life and the like, so that motor failure can become hidden trouble in operation.

The power module 2 and the main body 1 are detachably arranged, so that the main body 1 can be used for one time, and the power module 2 can be used repeatedly. The power module shell 22 can be a disposable sterile shell, the power module main body 21 is arranged in the power module shell 22 and then connected with the main body 1, the repeated use of the power module main body 21 can reduce the use cost of the electric anastomat, and therefore a better-quality motor can be selected without increasing the use cost.

While specific embodiments of the present invention have been described in detail above, the following description is also necessary.

(1) Although in the embodiment, the motor 211 and the lead screw 131 of the main body 1 are connected by the coupling 223. However, the invention is not limited thereto, but they may also be connected by other transmission mechanisms, such as gears.

(2) Although in the embodiment the power module 2 comprises a control unit 213 and an electric motor 211. However, the invention is not limited thereto, and the power module 2 may comprise one or more of a control unit, a motor and a battery.

(3) Although in the specific embodiment the power module 2 is located at the rear side of the main body 1. However, the present invention is not limited thereto, and the battery assembly 16 may be detachably coupled with the main body 1 as the power module 2 or a part of the power module.

(4) Although in the specific embodiment, the power module 2 includes a disposable, sterile power module housing 22, such that the power module 2 need not be sterilized by replacing the power module housing 22. However, the invention is not limited thereto and the power module may also be used with a reusable housing that can be sterilized and the power module may be sterilized prior to surgery.

In addition, it should be noted that the protection scope of the present invention is not limited to the specific embodiments described in the above embodiments, and those skilled in the art can make various reasonable modifications and combinations of features within the scope of the present invention.

Claims

1. An electric stapler capable of detecting firing resistance, comprising:

the firing mechanism (13) comprises a screw rod (131), a screw rod sleeve (132) and a firing rod (133), the firing rod (133) is connected to the screw rod sleeve (132), the screw rod sleeve (132) is sleeved on the screw rod (131), the screw rod sleeve (132) can be driven to move along the front-back direction (F) through the rotation of the screw rod (131), so that the firing rod (133) moves along the front-back direction (F) along with the screw rod sleeve (132), the screw rod sleeve (132) is provided with a pin (139) inserted into the screw rod sleeve (132), and the end part of the pin (139) is positioned in a gap between threads of the screw rod (131) to enable the pin (139) to be matched with the threads;

a pressure sensor (132 a), the pressure sensor (132 a) located at a rear end of the firing bar (133), the firing bar (133) transmitting force to the pressure sensor (132 a) when resistance is placed on the firing bar (133) against forward movement.

2. The electric stapler according to claim 1, wherein the wire rod sleeve (132) is provided with a receiving groove (132 b), the pressure sensor (132 a) and an end of the firing rod (133) are embedded in the receiving groove (132 b), and the pressure sensor (132 a) is located between a bottom of the receiving groove (132 b) and the end of the firing rod (133).

3. The electric stapler according to claim 1, characterized in that it is provided with an interface board (14), said interface board (14) being provided with a sensor interface, said pressure sensor (132 a) being electrically connected with said sensor interface.

4. The powered stapler according to claim 3, characterized in that it comprises jaws (129), said jaws (129) being provided with a blood oxygen saturation sensor (183), said blood oxygen saturation sensor (183) being electrically connected with said sensor interface.

5. The powered stapler of claim 1, wherein the powered stapler comprises:

a body (1), the body (1) comprising: the interface board (14), the interface board (14) is provided with a power module connection detection switch (143); and the firing mechanism (13);

a power module (2), the power module (2) being detachably connectable to the main body (1), the power module (2) comprising a control unit (213), the power module (2) further comprising a motor (211) and/or a battery assembly, the control unit (213) being electrically connected with the interface board (14) when the main body (1) and the power module (2) are connected together.

6. The electric stapler according to claim 5, wherein the power module (2) comprises the motor (211), and the motor (211) and the lead screw (131) are connected by a transmission mechanism in a state that the main body (1) and the power module (2) are connected together.

7. The powered stapler of claim 1, further comprising:

a return switch (144), the return switch (144) for controlling movement of the firing bar (133); and

the return sliding block (137) is arranged in a sliding mode along the front-back direction (F), and the return sliding block (137) can trigger the return switch (144) when sliding along the front-back direction (F);

wherein, firing pole (133) are provided with first trigger surface (133 a) and trigger piece installation department, first trigger surface (133 a) are towards the front side, when firing pole (133) move forward and reach first predetermined position, first trigger surface (133 a) trigger return slider (137), the trigger piece installation department is located the place ahead of first trigger surface (133 a), can install the trigger piece in the trigger piece installation department, the trigger piece can be when firing pole (133) reach second predetermined position return slider (137).

8. The powered stapler of claim 7, wherein the trigger mount is a groove (133 c), the groove (133 c) partially encircling a circumference of the firing bar (133) or forming an annular groove around the firing bar (133).

9. The powered stapler of claim 7, wherein the trigger mount is a hole.

10. The electric stapler according to claim 7, wherein a return push button (137 a) is connected to the return slider (137), the return push button (137 a) being exposed from a surface of the main body (1) of the electric stapler, so that the return slider (137) can trigger the return switch (144) by pushing the return push button (137 a).