A linear cutting stapler with firing feedback and method

Abstract

The present invention discloses a linear cutting stapler and method with firing feedback, comprising a nail pushing plate, a nail magazine cavity and a firing assembly, wherein the nail pushing plate is embedded in the nail magazine cavity, and the firing assembly pushes the cutting knife to abut against the nail pushing plate through a transmission component to drive the nail pushing plate; the side wall of the nail magazine cavity is provided with a first protrusion and a plurality of second protrusions, and the first protrusion and the second protrusion are both arranged along the height of the nail magazine cavity; the first protrusion is arranged close to the firing assembly; a positioning groove is provided on the nail pushing plate, and the first protrusion and the second protrusion can be embedded in the positioning groove. The present invention facilitates the judgment of the progress of cutting and anastomosis.

Description

Technical Field

[0001] The present invention relates to the field of laparoscopic linear cutting stapler equipment, and in particular to a linear cutting stapler with firing feedback and a method thereof. Background Art

[0002] Minimally invasive laparoscopic surgery is a surgery that uses special medical devices under endoscopic monitoring to perform the same operations as open surgery and achieve the same surgical results. This technology has significant advantages, such as small incisions, with a small abdominal incision of 0.5cm to 1cm; mild pain, no need for laparotomy, low pain, intravenous anesthesia, and the surgery is completed while the patient is asleep; fast recovery, reduced organ damage and interference with organ function, shortened postoperative recovery time, and patients can get out of bed 6-8 hours after surgery. Minimally invasive surgery is an inevitable trend in the development of surgery. Due to the late start in China, the technology is relatively backward. In recent years, with the improvement of people's health awareness and the increase in residents' disposable income, the domestic market for minimally invasive laparoscopic linear cutting staplers has been growing rapidly, and the demand for minimally invasive laparoscopic linear cutting staplers will continue to grow.

[0003] The laparoscopic linear cutting stapler is an important instrument for minimally invasive surgery. It is used together with the stapler assembly during surgery and is suitable for cutting, transection and anastomosis of tissues in minimally invasive surgeries such as general surgery, gynecology, urology and thoracic surgery. Generally, one laparoscopic linear cutting stapler is used in one operation, and multiple stapler assemblies are used. During the operation, the doctor needs to always understand the operating status of the instrument, especially the progress of cutting and anastomosis. The prior art is to judge the progress of cutting and anastomosis by observing the position of the cutting knife and combining the scale marked on the stapler seat. However, minimally invasive laparoscopic surgery is performed under endoscopic monitoring. Due to the limitations of space and endoscopic field of view, as well as the posture of the instrument itself, it is difficult for the operator to observe the progress of cutting and suturing with the naked eye. In addition, the position of the cutting knife can only judge the progress of cutting, and cannot determine the progress of anastomosis. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a linear cutting stapler and method with firing feedback, which is convenient for judging the progress of cutting and stapleing.

[0005] In order to solve the above technical problems, the present invention provides a linear cutting stapler with firing feedback, comprising a nail pushing plate, a nail magazine cavity and a firing assembly, wherein the nail pushing plate is embedded in the nail magazine cavity, and the firing assembly pushes the cutting knife to abut against the nail pushing plate through a transmission component to drive the nail pushing plate; the side wall of the nail magazine cavity is provided with a first protrusion and a plurality of second protrusions, and the first protrusion and the second protrusion are both arranged along the height of the nail magazine cavity; the first protrusion is arranged close to the firing assembly; a positioning groove is opened on the nail pushing plate, and the first protrusion and the second protrusion can be embedded in the positioning groove.

[0006] Furthermore, an avoidance groove is provided on the nail pushing plate, and the depth of the avoidance groove is smaller than the depth of the positioning groove.

[0007] Furthermore, a gap is left between the second protrusion and the bottom of the nail magazine cavity.

[0008] Furthermore, a gap is left between the end surface of the second protrusion and the bottom wall of the positioning groove.

[0009] Furthermore, the first protrusion and the second protrusion are both chamfered.

[0010] Furthermore, the second protrusions are distributed at equal intervals.

[0011] Furthermore, a sensor is provided on the firing assembly.

[0012] Furthermore, the side wall of the nail magazine cavity is provided with marking scales.

[0013] The present invention also aims to provide a method for applying a nail magazine assembly with firing feedback, comprising the following steps:

[0014] S1, the nail pushing plate is embedded in the nail bin, and the first protrusion is embedded in the positioning groove;

[0015] S2, the firing assembly pushes the cutting knife through the transmission component to drive the nail pushing plate to move in the nail bin;

[0016] S3. The second protrusion is embedded in the second positioning groove, and the mechanical signal generated when the second protrusion and the positioning protrusion are locked is transmitted to the firing assembly through the cutting knife.

[0017] Furthermore, after step S3, the method further includes:

[0018] S4. When the received mechanical signal is greater than the preset value, the anastomosis is carried out normally; otherwise, the pushing of the firing assembly is stopped;

[0019] S5. Count the number of times the mechanical signal is received to assist in determining the anastomotic position.

[0020] Beneficial effects of the present invention:

[0021] In the initial position, the first protrusion is embedded in the positioning groove to limit the relative position between the push plate and the nail magazine cavity to prevent the position of the push plate from being displaced relative to the nail magazine cavity during transportation and loading and unloading, thereby affecting the subsequent confirmation of the cutting position and the matching position; when the second protrusion is embedded in the positioning groove, a clamping force will be generated between the second protrusion and the positioning groove, thereby causing the force between the push plate and the nail magazine cavity to change, thereby generating a mechanical signal; when the firing assembly drives the push plate to move through the cutting knife, the force exerted by the firing assembly on the push plate will also change accordingly, thereby enabling the operator to receive the mechanical signal between the push plate and the nail magazine cavity; because the position of the second protrusion is pre-set on the push plate, the matching position can also be determined by the mechanical signal between the second protrusion and the positioning groove; at the same time, the mechanical signal between the push plate and the firing assembly needs to be transmitted through the cutting knife, so in the process of determining the mechanical signal, the operator can also determine the cutting position. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the present invention;

[0023] Figure 2 is a schematic diagram of the nail magazine cavity of the present invention;

[0024] Figure 3 It is a schematic diagram of the nail pushing plate in the present invention.

[0025] Explanation of the numbers in the figure: 1, cutting knife; 2, nail pushing plate; 21, positioning groove; 22, avoidance groove; 3, nail magazine cavity; 31, first protrusion; 32, second protrusion. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0027] Reference Figure 1-Figure 3 As shown, an embodiment of a linear cutting stapler with firing feedback of the present invention includes a nail pushing plate 2, a nail magazine cavity 3, a cutting knife 1 and a firing assembly, wherein the nail pushing plate 2 is embedded in the nail magazine cavity 3, and can use the guide fins located in the middle of the nail pushing plate 2 to drive the titanium nail placed in the nail magazine cavity 3 to move upward, so that the titanium nail can penetrate the tissue to complete the suturing of the tissue. The firing assembly drives the nail pushing plate 2 to move in the nail magazine cavity 3 through the cutting knife 1, so as to cut the tissue with the cutting knife 1. The firing assembly includes a firing handle, and the firing handle can drive the cutting knife to move through a transmission component. The transmission component includes various forms such as crank transmission, which belongs to the prior art and will not be described in detail here.

[0028] A first protrusion 31 and a plurality of second protrusions 32 are provided on the side wall of the nail magazine cavity 3, and the first protrusion 31 and all the second protrusions 32 are arranged along the height direction of the nail magazine cavity 3. At the same time, a positioning groove 21 is provided on the side wall of the guide fin of the nail pushing plate 2, and the first protrusion 31 and the second protrusion 32 can be embedded in the positioning groove 21. The first protrusion 31 is located on the side of the nail magazine assembly close to the cutting knife 1, and the second protrusion 32 is arranged in the direction away from the cutting knife 1. In the initial position, the first protrusion 31 is embedded in the positioning groove 21 to limit the relative position between the nail pushing plate 2 and the nail magazine cavity 3, so as to prevent the position of the nail pushing plate 2 from being displaced relative to the nail magazine cavity 3 during transportation and loading and unloading, thereby affecting the confirmation of the subsequent cutting position and the anastomosis position.

[0029] When the push plate 2 moves in the nail magazine cavity 3 under the drive of the firing assembly, the first protrusion 31 and the positioning groove 21 are separated, and the second protrusion 32 can be embedded in the positioning groove 21. When the second protrusion 32 is embedded in the positioning groove 21, a clamping force will be generated between the second protrusion 32 and the positioning groove 21, so that the force between the push plate 2 and the nail magazine cavity 3 changes, thereby generating a mechanical signal. When the firing assembly drives the push plate 2 to move through the cutting knife 1, the force of the firing assembly on the push plate 2 will also change accordingly, so that the operator can receive the mechanical signal between the push plate 2 and the nail magazine cavity 3. Because the position of the second protrusion 32 is pre-set on the push plate 2, the matching position can also be determined by the mechanical signal between the second protrusion 32 and the positioning groove 21. At the same time, the mechanical signal between the push plate and the firing assembly needs to be transmitted through the cutting knife 1, so in the process of determining the mechanical signal, the operator can also determine the cutting position. The mechanical signal is generated by the interlocking force between the second protrusion 32 and the positioning groove 21 to realize the judgment of the anastomosis position and the cutting position, which avoids the situation in the prior art where it is difficult to judge the anastomosis position in a surgery with a narrow field of view, and the situation where the cutting position is in place but the anastomosis position is not in place due to the breakage or damage of the push nail piece. In addition, the interlocking force between the second protrusion 32 and the positioning groove 21 makes the mechanical signal more stable, and there will be no misjudgment due to the inability to see the marking scale clearly in a narrow field of view. In addition, because adding a marking scale to the stapler cavity 3 requires a separate process, and the material of the marking scale needs to be medical grade, the cost of the stapler assembly is relatively high. Therefore, by using the interlocking force between the second protrusion 32 and the positioning groove 21 to judge the anastomosis position and the cutting position, the processing cost of the stapler can be reduced.

[0030] The second protrusions 32 are evenly spaced in a direction away from the cutting blade 1. The evenly spaced second protrusions 32 make it easier to determine the matching position and the cutting position, which is convenient for the operator to use and improves the efficiency of determination.

[0031] The push nail plate 2 is provided with an avoidance groove 22, and the depth of the avoidance groove 22 is less than the depth of the positioning groove 21. The avoidance groove 22 is located on the guide fin of the push nail plate 2, and is located on the side of the push nail plate 2 away from the cutting knife 1. When the firing assembly drives the push nail plate 2 to move in the nail magazine cavity 3, the second protrusion 32 is pre-engaged with the avoidance groove 22, and then embedded in the positioning groove 21. In this embodiment, the avoidance groove 22 is arranged adjacent to the positioning groove 21, so when the second protrusion 32 is pushed to separate from the positioning groove 21, the second protrusion 32 will be pushed into the avoidance groove 22, thereby reducing the distance that the top of the second protrusion 32 is pushed when the second protrusion 32 is separated from the positioning groove 21, so that the avoidance groove 22 is arranged to facilitate the second protrusion 32 embedded in the positioning groove 21 to be pushed out, thereby facilitating the user's operation.

[0032] When the second protrusion 32 is embedded in the positioning groove 21, a gap is left between the second protrusion 32 and the bottom wall of the nail magazine cavity 3, so that a mechanical signal can be generated when the second protrusion 32 and the positioning groove 21 are embedded, thereby facilitating the separation of the second protrusion 32 and the positioning groove 21.

[0033] In addition, a gap is left between the lower surface of the second protrusion 32 and the bottom of the staple cartridge cavity 3, so that a mechanical signal can be generated when the second protrusion 32 and the positioning groove 21 are embedded, thereby facilitating the separation of the second protrusion 32 and the positioning groove 21. In this embodiment, no gap is left between the lower surface of the first protrusion 31 and the staple cartridge cavity 3, so that the stability of the first protrusion 31 and the positioning groove 21 when embedded can be increased, thereby further preventing the position of the staple push plate 2 from being inaccurate at the initial position, thereby affecting the subsequent judgment of the anastomosis position and the cutting position.

[0034] The first protrusion 31 and the second protrusion 32 are both chamfered, and the chamfers are used to facilitate the first protrusion 31 and the second protrusion 32 to be separated from the positioning groove 21 for the convenience of the operator.

[0035] Furthermore, a sensor is provided on the firing assembly, and in this embodiment, the sensor is preferably a pressure sensor. The sensor is used to detect the mechanical signal received by the firing assembly, which is convenient for the operator to judge.

[0036] In another embodiment, a marking scale is further provided on the staple cartridge cavity 3, and the marking scale can further assist the operator in determining the anastomosis position and the cutting position, thereby improving the accuracy of position determination.

[0037] A method for using a linear cutting stapler with firing feedback comprises the following steps:

[0038] S1, the nail pushing plate 2 is embedded in the nail bin, and the first protrusion 31 is embedded in the positioning groove 21 in the initial position;

[0039] S2, the firing assembly drives the nail pushing plate 2 to move in the nail bin through the cutting knife 1, so that the first protrusion 31 and the positioning groove 21 are separated;

[0040] S3, as the nail pushing plate 2 continues to move, the second protrusion 32 can be embedded in the second positioning groove 21, and the mechanical signal generated when the second protrusion 32 and the positioning protrusion are locked is transmitted to the firing assembly through the cutting knife 1;

[0041] S4, when the received mechanical signal is greater than the preset value, the anastomosis is carried out normally; otherwise, the pushing of the firing assembly is stopped; in this embodiment, the preset value is the force between the nail pushing plate 2 and the nail magazine cavity 3 when the nail pushing plate 2 moves between the two second protrusions 32;

[0042] S5. Count the number of times the mechanical signal is received to assist in determining the anastomotic position. Because the second protrusions 32 in this embodiment are evenly distributed on the side wall of the staple cartridge cavity 3, the operator can determine the anastomotic position and the cutting position based on the number of mechanical signals counted.

[0043] The above-described embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or changes made by those skilled in the art based on the present invention are within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A linear cutting stapler with firing feedback, characterized in that: It includes a nail pushing plate, a nail magazine cavity and a firing assembly, wherein the nail pushing plate is embedded in the nail magazine cavity, and the firing assembly abuts against the nail pushing plate through a cutting knife to drive the nail pushing plate; the side wall of the nail magazine cavity is provided with a first protrusion and a plurality of second protrusions, and the first protrusion and the second protrusion are both arranged along the height of the nail magazine cavity; the first protrusion is arranged close to the firing assembly; a positioning groove is opened on the nail pushing plate, and the first protrusion and the second protrusion can be embedded in the positioning groove.

2. The linear cutting stapler with firing feedback according to claim 1, characterized in that: The pin pushing plate is provided with an avoidance groove, and the depth of the avoidance groove is less than the depth of the positioning groove.

3. The linear cutting stapler with firing feedback according to claim 1, characterized in that: A gap is left between the second protrusion and the bottom of the nail magazine cavity.

4. The linear cutting stapler with firing feedback according to claim 1, characterized in that: A gap is left between the end surface of the second protrusion and the bottom wall of the positioning groove.

5. The linear cutting stapler with firing feedback according to claim 1, characterized in that: The first protrusion and the second protrusion are both chamfered.

6. The linear cutting stapler with firing feedback according to claim 1, characterized in that: The second protrusions are distributed at equal intervals.

7. The linear cutting stapler with firing feedback according to claim 1, characterized in that: A sensor is arranged on the firing assembly.

8. The linear cutting stapler with firing feedback according to claim 1, characterized in that: The side wall of the nail magazine cavity is provided with marking scales.

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