CN115530902A

CN115530902A - Anastomat

Info

Publication number: CN115530902A
Application number: CN202211026995.XA
Authority: CN
Inventors: 张天赐; 陈毅豪; 贾二文
Original assignee: Institute of Flexible Electronics Technology of THU Zhejiang
Current assignee: Institute of Flexible Electronics Technology of THU Zhejiang
Priority date: 2022-08-25
Filing date: 2022-08-25
Publication date: 2022-12-30

Abstract

The application relates to an anastomat, including forced induction device and nail storehouse, forced induction device is arranged in monitoring anastomat clamping process's squeezing force, and the upper surface distribution of nail storehouse has the nail groove, and forced induction device sets up in at least one side of nail storehouse upper surface along the length direction of nail storehouse, and forced induction device's upper surface matches with the upper surface height in nail groove, and forced induction device and the regional noncoincidence in nail groove place. The stapler of this application can be at the clamping process of stapler's real-time supervision nail storehouse and the human tissue between squeezing force size through the integration of pressure sensing device and nail storehouse, through the high selection of real-time squeezing force change guide doctor's nail height of seam nail, promotes and uses the sutural treatment effect of stapler.

Description

Anastomat

Technical Field

The application relates to the technical field of medical instruments, in particular to an anastomat.

Background

Suturing is an indispensable and very important link in surgery. In modern surgical operations, staplers are widely used due to their excellent suturing properties. However, parameters such as the thickness of human tissue, the height of staples and the magnitude of the compression force of the stapler all affect the suturing effect, and improper parameter selection often results in poor suturing effect. For example, when the tissue is thick, the use of staples having a low height may result in excessive compression of the tissue, rupture of the submucosal vessels, bleeding of the mucosa, etc.; when the tissue is thin, the use of the high-height staples can result in the failure to effectively close thick blood vessels, resulting in poor staple formation, tissue bleeding and the like. In addition to the tissue thickness, the magnitude of the pressing force can also have a crucial influence on the stitching effect. If the squeezing force is too large, the tissue is easily damaged, and meanwhile, after the clamping force is unloaded, the resilience force of the tissue is also large, so that potential risk of secondary damage of the tissue is caused.

Due to the complex diversity of human tissues, the surgeon often selects staples and adjusts the squeezing force according to experience when performing the suturing operation by using the stapler, which further increases the risk of the operation. Therefore, how to accurately help the doctor to select the height of the staple and judge the magnitude of the squeezing force has important significance for improving the suturing effect of the anastomat.

Disclosure of Invention

To above-mentioned technical problem, the application provides an anastomat, through the integration of pressure induction device and nail storehouse, can be at the clamping process of anastomat real-time supervision nail storehouse and the human tissue between the squeezing force size, through the high selection of real-time squeezing force change guide doctor's nail height of seam, promote the treatment effect of using the anastomat to sew up.

In order to solve the technical problem, the application provides an anastomat, including forced induction device and nail storehouse, the forced induction device is arranged in monitoring anastomat clamping process's the power of squeezing, the upper surface distribution of nail storehouse has the nail groove, the forced induction device is followed the length direction setting of nail storehouse is in at least one side of nail storehouse upper surface, the forced induction device's upper surface with the upper surface height in nail groove matches, the forced induction device with the nail groove place region does not coincide.

The pressure sensing device comprises a first portion and a second portion, and the first portion and the second portion are arranged on two sides of the upper surface of the nail bin respectively along the length direction of the nail bin.

The signal input circuit of the first part is connected with the signal input circuit of the second part by a time-sharing multiplexing circuit, the first signal output circuit of the first part is connected with the first signal output circuit of the second part, the second signal output circuit of the first part is connected with the second signal output circuit of the second part, and the ground wire of the first part is connected with the ground wire of the second part.

Wherein, the difference in height of the upper surface of pressure-sensitive device and the upper surface of nail groove is less than or equal to 0.5mm.

Wherein, the thickness of the pressure sensing device is 0.2 mm-1 mm.

The pressure sensing device comprises a circuit board and a plurality of pressure sensing structures distributed on the circuit board, wherein the pressure sensing structures comprise a first resistor, a second resistor, a third resistor and a fourth resistor which are connected to form an electric bridge, and the first resistor and the third resistor are strain sensing resistors.

Wherein the first resistor and the second resistor are connected in series to form a first structure, the third resistor and the fourth resistor are connected in series to form a second structure, and the first structure and the second structure are connected in parallel,

alternatively, the first and second electrodes may be,

the first resistor and the fourth resistor are connected in series to form a third structure, the second resistor and the third resistor are connected in series to form a fourth structure, and the third structure and the fourth structure are connected in parallel.

Hard substrates are respectively arranged at the positions of the second resistor and the fourth resistor, and the thickness of each hard substrate is 0.005-1 mm.

The pressure sensing structures are distributed on the circuit board in an array mode along the length direction of the circuit board.

The pressure sensing structure comprises a plurality of pressure sensing structures, a plurality of first signal output ends, a plurality of second signal output ends and a plurality of ground wires, wherein the signal input ends of the pressure sensing structures are connected with each other through a time-sharing multiplexing circuit, the first signal output ends of the pressure sensing structures are connected with each other, the second signal output ends of the pressure sensing structures are connected with each other, and the ground wires of the pressure sensing structures are connected with each other.

Drawings

FIG. 1 is one of the schematic structural views of a stapler according to an embodiment of the application;

FIG. 2 is a second schematic diagram of a stapler according to an embodiment of the present application;

FIG. 3 is a third schematic diagram of a stapler according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a pressure sensing apparatus according to an embodiment of the present application;

FIG. 5 is one of the schematic structural diagrams of a pressure sensing structure according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a pressure sensing structure according to an embodiment of the present application;

FIG. 7 is an equivalent circuit diagram of a pressure sensing structure shown in accordance with an embodiment of the present application;

FIG. 8 is an equivalent circuit diagram of a pressure sensing device according to an embodiment of the present application;

fig. 9 is a graph illustrating a pressure sensing structure versus voltage signal output according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application is provided for illustrative purposes, and other advantages and capabilities of the present application will become apparent to those skilled in the art from the present disclosure.

In the following description, reference is made to the accompanying drawings that describe several embodiments of the application. It is to be understood that other embodiments may be utilized and that mechanical, structural, electrical, and operational changes may be made without departing from the spirit and scope of the present application. The following detailed description is not to be taken in a limiting sense, and the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Although the terms first, second, etc. may be used herein to describe various elements in some instances, these elements should not be limited by these terms. These terms are only used to distinguish one element from another.

Also, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes" and/or "including," when used in this specification, specify the presence of stated features, steps, operations, elements, components, items, species, and/or groups, but do not preclude the presence, or addition of one or more other features, steps, operations, elements, components, species, and/or groups thereof. The terms "or" and/or "as used herein are to be construed as inclusive or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a; b; c; a and B; a and C; b and C; A. b and C ". An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some way.

Fig. 1 is a schematic structural view of a stapler according to an embodiment of the present application. Fig. 2 is a second schematic structural diagram of the stapler according to the embodiment of the present application. Fig. 3 is a third schematic structural diagram of a stapler according to an embodiment of the present application. As shown in fig. 1 to 3, the present application provides a stapler, which includes a pressure sensing device 100 and a staple cartridge 200, wherein the pressure sensing device 100 is used for monitoring a pressing force during a clamping process of the stapler, a plurality of raised staple grooves 202 are distributed on an upper surface of the staple cartridge 200, the pressure sensing device 100 is disposed on at least one side of the surface of the staple cartridge 200 along a length direction of the staple cartridge 200, the upper surface of the pressure sensing device 100 is matched with the upper surfaces of the staple grooves 202 in height, and an area where the pressure sensing device 100 and the staple grooves 202 are located is not overlapped.

When the stapler performs an anastomosis operation on the human tissue, the stapler generates a pressing force on the human tissue, and the pressing force is applied to the pressure sensing device 100 and is then detected by the pressure sensing device 100. The stapler of the embodiment of the application can monitor the squeezing force (namely the contact pressure between the staple cartridge 200 and human tissues) in real time in the clamping process of the stapler through the integration of the pressure sensing device 100 and the staple cartridge 200, guides a doctor to select the staple height through the change of the squeezing force, adjusts the related action of the stapler in real time, and improves the stapling effect of the stapler.

Optionally, the pressure sensing apparatus 100 comprises a first portion 104 and a second portion 105, and the first portion 104 and the second portion 105 are respectively disposed on two sides of the upper surface of the staple cartridge 200 along the length direction of the staple cartridge 200. The pressure-sensitive devices 100 are disposed at both sides of the upper surface of the magazine 200 to prevent the pressure-sensitive devices 100 from interfering with the staple grooves 202. Therefore, the pressure sensing device 100 is integrated on the surface of the nail bin 200 of the anastomat, the pressure sensing device 100 does not influence the normal nail outlet of the anastomat, and the direct measurement of the tissue squeezing force of the anastomat in the sewing process is realized.

Alternatively, the first portion 104 and the second portion 105 may be electrically connected. When the first section 104 and the second section 105 are electrically connected, the signal input circuit of the first section 104 and the signal input circuit of the second section 105 are not connected to each other but connected to the time-division multiplexing circuit, the first signal output circuit of the first section 104 is connected to the first signal output circuit of the second section 105, the second signal output circuit of the first section 104 is connected to the second signal output circuit of the second section 105, and the ground line of the first section 104 is connected to the ground line of the second section 105. In this way, the number of wires required for the pressure sensing apparatus 100 can be reduced by sharing the first signal output circuit, the second signal output circuit, and the ground between the first portion 104 and the second portion 105.

The pressure sensing device 100 is closely attached to the surface of the stapler cartridge 200, and has a thickness aligned with the upper surface of the staple groove 202 of the staple cartridge 200, or slightly lower or higher than the upper surface of the staple groove 202. Illustratively, the height difference between the upper surface of the pressure sensing device 100 and the upper surface of the staple groove 202 may be less than or equal to 0.5mm. The overall thickness of the pressure sensing device 100 may be 0.2mm to 1mm to accommodate different types of staple cartridges 200.

As shown in fig. 4 to 5, the pressure sensing apparatus 100 includes a circuit board 106 and a plurality of pressure sensing structures 101 distributed on the circuit board 106, and specifically, each of the first portion 104 and the second portion 105 includes the circuit board 106 and the plurality of pressure sensing structures 101 distributed on the circuit board 106. The pressure sensing structures 101 are distributed on the circuit board 106 in an array along the length direction of the circuit board 106, and the pressure sensing structures 101 are parallel to each other. The pressure sensing apparatus 100 is composed of a plurality of pressure sensing structures 101, and the number of the pressure sensing structures 101 may be determined according to different situations. Each pressure sensing structure 101 can detect the pressing force at the corresponding position, the adopted array type pressure sensing structure 101 mode can measure the tissue pressing force of a plurality of areas, and the plurality of pressure sensing structures 101 jointly form a pressing force cloud chart of the whole anastomat nail bin 200 plane.

The pressure sensing structure 101 comprises a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4 which are connected to form a bridge, wherein the first resistor R1 and the third resistor R3 are strain sensing resistors. The single pressure Sensing structure 101 includes at least 4 resistors, wherein the first Resistor R1 and the third Resistor R3 are strain Sensing resistors, and the resistance value changes under the action of a pressing Force, and may be a pressure ink, a pressure sensitive Resistor, a strain gauge, an FSR (Force Sensing Resistor) resistance type pressure sensor or other strain Sensing resistors. The second resistor R2 and the fourth resistor R4 may be strain-sensitive resistors or non-strain-sensitive resistors. The plurality of resistors are connected by the conductive material 102 to form a current loop. The conductive material 102 may be carbon paste, silver paste, carbon nanotube, graphene, or the like.

As shown in fig. 6, the hard substrates 103 are respectively disposed at the positions of the second resistor R2 and the fourth resistor R4, and the thickness of the hard substrate 103 is 0.005mm to 1mm. The second resistor R2 and the fourth resistor R4 are fixed to the hard substrate 103. When a pressure force acts on the pressure sensing structure 101, the second resistor R2 and the fourth resistor R4 are fixed on the hard substrate 103, and basically do not deform under the action of the stress, so that the resistance value does not change. And the first resistor R1 and the third resistor R3 generate large deformation under the action of squeezing force, so that the resistance value is changed. By detecting the change of the resistance values of the first resistor R1 and the third resistor R3, the magnitude of the pressing force can be calculated. The thickness of the hard substrate 103 is 0.005mm to 1mm depending on the magnitude of the pressing force to be detected, and the material may be hard metal, hard plastic, ceramic, glass, or the like.

In one embodiment, when the first resistor R1 and the second resistor R2 are connected in series to form a bridge, the third resistor R3 and the fourth resistor R4 are connected in series to form a second structure, and the first structure and the second structure are connected in parallel, or the first resistor R1 and the fourth resistor R4 are connected in series to form a third structure, the second resistor R2 and the third resistor R3 are connected in series to form a fourth structure, and the third structure and the fourth structure are connected in parallel.

As shown in fig. 7, in a specific measurement, either end of V1 and V2 can be used as a voltage input end, and the other end can be used as a signal output end. If V1+ and V1-are used as voltage input points, V2+ and V2-are used as signal output ends, at this time, the first resistor R1 and the second resistor R2 are connected in series to form a first structure, the third resistor R3 and the fourth resistor R4 are connected in series to form a second structure, and the first structure and the second structure are connected in parallel, or vice versa. If V2+ and V2-are used as signal input points, V1+ and V1-are used as voltage output ends, at this time, the first resistor R1 and the fourth resistor R4 are connected in series to form a third structure, the second resistor R2 and the third resistor R3 are connected in series to form a fourth structure, and the third structure and the fourth structure are connected in parallel. When the squeezing force acts on the first resistor R1 and the third resistor R3, variable voltage signal output is generated, the voltage output signal and the magnitude of the squeezing force are in a linear relation, and the magnitude of the squeezing force can be reversely deduced through the value of the voltage.

In one embodiment, the signal input terminals of the pressure sensing structures 101 are not connected to each other and are connected to the time division multiplexing circuit, the first signal output terminals of the pressure sensing structures 101 are connected to each other, the second signal output terminals of the pressure sensing structures 101 are connected to each other, and the ground lines of the pressure sensing structures 101 are connected to each other. It should be noted that, the time division multiplexing circuit takes time as a parameter for division transmission, so that the circuit connection states of the pressure sensing structures 101 do not overlap with each other on the time axis, that is, the circuits of the pressure sensing structures 101 are connected in different time periods, so that the pressure sensing structures 101 can respectively output voltage output signals of the stress applied to the pressure sensing structures 101 without interfering with each other.

It is worth mentioning that a single pressure sensing structure 101 needs to have 4 wires led out, including 2 signal wires and 2 power supply wires. When a plurality of pressure-sensitive structures 101 are present, the number of signal lines and power supply lines also increases, making it difficult to design wiring on a narrow surface of the magazine 200. Based on this, the embodiment of the application provides a multiplexed press force measuring circuit to reduce the number of wires required as much as possible. Referring to fig. 8, fig. 8 shows a measurement circuit composed of three pressure-sensing structures 101, namely, a first pressure-sensing structure 1041, a second pressure-sensing structure 1042 and a third pressure-sensing structure 1043, and the measurement circuits of different numbers of pressure-sensing structures 101 can be equivalently implemented in the same manner. Wherein Vout + and Vout-are two signal output terminals shared by the first pressure sensing structure 1041, the second pressure sensing structure 1042 and the third pressure sensing structure 1043, and a difference value therebetween is in a linear relationship with a force applied to the pressure sensing structure 101. By adopting a multiplexing measuring circuit, the number of required leads can be effectively reduced, and the wiring design on the narrow surface of the nail bin 200 is convenient.

Specifically, the signal output terminals of different pressure sensing structures 101 are short-circuited with each other, so that there are only two signal output lines of the plurality of pressure sensing structures 101. At the voltage input of the pressure sensing structure 101, the Ground lines GND (Ground) thereof are shorted together. The voltage input ends Vin of the different pressure sensing structures 101 are controlled to realize the measurement of the different pressure sensing structures 101. For example, when Vin1 is input, the signal output end and the first pressure sensing structure 1041 can be measured; when Vin2 is input, the signal output end and the stress of the second pressure sensing structure 1042 can be measured; when Vin3 is input, the signal output end and the stress of the third pressure sensing structure 1043 can be measured. When there are 3 pressure sensing structures 101 in the measurement circuit, a total of only 6 leads are required. By analogy, when there are N pressure sensing structures 101, only N +3 leads are needed, and this design greatly improves the wiring utilization ratio of the pressure sensing apparatus 100.

The data acquisition of the pressure sensing device 100 is similar to the wheatstone bridge differential signal acquisition, and can be displayed in real time after filtering, operational amplification and analog/digital conversion. Fig. 9 is a graph illustrating a pressure sensing structure versus voltage signal output according to an embodiment of the present application. As shown in fig. 9, the abscissa is the pressure value of the pressure sensing structure 101, and the ordinate is the output voltage of the pressure sensing structure 101, and experiments prove that the stress magnitude of the pressure sensing structure 101 and the voltage signal show a high linear correlation, so that the pressure sensing structure 101 can accurately measure the squeezing force.

The stapler of this application embodiment, including forced induction device and nail storehouse, forced induction device is arranged in monitoring the squeezing force of anastomat clamping process, and the upper surface distribution of nail storehouse has the nail groove, and forced induction device sets up in at least one side of nail storehouse upper surface along the length direction of nail storehouse, and forced induction device's upper surface matches with the upper surface height in nail groove, and forced induction device and the regional noncoincidence in nail groove place. The stapler of this application can be at the clamping process of stapler's real-time supervision nail storehouse and the human tissue between squeezing force size through the integration of pressure sensing device and nail storehouse, through the high selection of real-time squeezing force change guide doctor's nail height of seam nail, promotes and uses the sutural treatment effect of stapler.

The above embodiments are merely illustrative of the principles and utilities of the present application and are not intended to limit the application. Any person skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of the present application.

Claims

1. The anastomat is characterized by comprising a pressure sensing device and a nail bin, wherein the pressure sensing device is used for monitoring the squeezing force in the clamping process of the anastomat, nail grooves are distributed on the upper surface of the nail bin, the pressure sensing device is arranged on at least one side of the upper surface of the nail bin along the length direction of the nail bin, the upper surface of the pressure sensing device is matched with the height of the upper surface of the nail grooves, and the pressure sensing device is not overlapped with the area where the nail grooves are located.

2. The stapler of claim 1, wherein the pressure sensing device includes a first portion and a second portion disposed on either side of an upper surface of the staple cartridge along a length of the staple cartridge.

3. The stapler according to claim 2, wherein the signal input circuit of the first section is connected to the signal input of the second section by a time-division multiplexing circuit, the first signal output circuit of the first section is connected to the first signal output circuit of the second section, the second signal output circuit of the first section is connected to the second signal output circuit of the second section, and the ground line of the first section is connected to the ground line of the second section.

4. The stapler of claim 1, wherein a height difference between an upper surface of the pressure sensing device and an upper surface of the staple channel is less than or equal to 0.5mm.

5. The stapler according to claim 1, wherein the pressure sensing device has a thickness of 0.2mm to 1mm.

6. The stapler of claim 1, wherein the pressure sensing device comprises a circuit board and a plurality of pressure sensing structures distributed on the circuit board, the pressure sensing structures comprising a first resistor, a second resistor, a third resistor and a fourth resistor connected to form a bridge, wherein the first resistor and the third resistor are strain sensing resistors.

7. The stapler of claim 6, wherein the first resistor and the second resistor are connected in series to form a first structure, the third resistor and the fourth resistor are connected in series to form a second structure, the first structure and the second structure being connected in parallel,

alternatively, the first and second electrodes may be,

8. The anastomat of claim 6 or 7, wherein the second resistor and the fourth resistor are respectively provided with a hard substrate, and the thickness of the hard substrate is 0.005 mm-1 mm.

9. The stapler of claim 6, wherein the pressure sensing structures are distributed on the circuit board in a matrix along a length of the circuit board.

10. The stapler of claim 6, wherein the signal input terminals of the plurality of pressure sensing structures are connected to a time-division multiplexing circuit, the first signal output terminals of the plurality of pressure sensing structures are connected to each other, the second signal output terminals of the plurality of pressure sensing structures are connected to each other, and the ground lines of the plurality of pressure sensing structures are connected to each other.