anastomat

Abstract

The application relates to an anastomat, comprising a pressure sensing device and a nail bin, the pressure sensing device is used for monitoring the pressing force in the clamping process of the anastomat, the upper surface of the nail bin is distributed with nail grooves, 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 upper surface height of the nail groove, and the pressure sensing device does not coincide with the area where the nail groove is located. The anastomat can monitor the pressing force between the nail bin and human tissues in real time in the clamping process of the anastomat through the integration of the pressure sensing device and the nail bin, the selection of the nail height is guided by the real-time pressing force change, and the treatment effect of the anastomat is improved.

Description

Technical Field

[0001] This application relates to the field of medical device technology, specifically to a stapler. Background Technology

[0002] Suturing is an essential and crucial step in surgical procedures. In modern surgery, staplers are widely used due to their excellent suturing performance. However, parameters such as tissue thickness, staple height, and staple compression force all affect the suturing outcome; inappropriate parameter selection often leads to poor results. For example, when the tissue is thick, using staples with a lower height can cause excessive tissue compression, resulting in submucosal vascular rupture and mucosal bleeding. Conversely, when the tissue is thin, using staples with a higher height may fail to effectively compress larger blood vessels, leading to poor staple formation and tissue bleeding. Besides tissue thickness, the compression force also has a critical impact on the suturing outcome. Excessive compression force can easily cause tissue damage, and after the clamping force is released, the tissue's rebound force will be greater, leading to a potential risk of secondary tissue damage.

[0003] For surgeons, due to the complexity and diversity of human tissues, the selection of staples and adjustment of compression force when using staplers for suturing often rely on experience. This experience-based approach further increases the risk of surgery. Therefore, accurately assisting surgeons in selecting staple height and judging compression force is crucial for improving the suturing effect of staplers. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a stapler that, through the integration of a pressure sensing device and a staple cartridge, can monitor the magnitude of the compressive force between the staple cartridge and human tissue in real time during the stapler's clamping process. By analyzing the real-time changes in compressive force, the application guides the physician in selecting the appropriate staple height, thereby improving the treatment effect of stapler suturing.

[0005] To solve the above-mentioned technical problems, this application provides a stapler, including a pressure sensing device and a staple cartridge. The pressure sensing device is used to monitor the squeezing force during the stapler clamping process. The upper surface of the staple cartridge has staple grooves distributed thereon. The pressure sensing device is disposed on at least one side of the upper surface of the staple cartridge along the length direction of the staple cartridge. The upper surface of the pressure sensing device is height-matched with the upper surface of the staple grooves. The area where the pressure sensing device and the staple grooves are located does not overlap.

[0006] The pressure sensing device includes a first part and a second part, which are respectively disposed on both sides of the upper surface of the staple cartridge along the length direction of the staple cartridge.

[0007] The signal input circuit of the first part is connected to the signal input circuit of the second part via a time-division multiplexing circuit. The first signal output circuit of the first part is connected to the first signal output circuit of the second part. The second signal output circuit of the first part is connected to the second signal output circuit of the second part. The ground wire of the first part is connected to the ground wire of the second part.

[0008] The height difference between the upper surface of the pressure sensing device and the upper surface of the nail groove is less than or equal to 0.5 mm.

[0009] The thickness of the pressure sensing device is 0.2 mm to 1 mm.

[0010] The pressure sensing device includes a circuit board and a plurality of pressure sensing structures distributed on the circuit board. The pressure sensing structure includes a first resistor, a second resistor, a third resistor and a fourth resistor connected to form a bridge circuit, wherein the first resistor and the third resistor are strain sensing resistors.

[0011] In this configuration, 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.

[0012] or,

[0013] 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.

[0014] The second resistor and the fourth resistor are respectively provided with a hard substrate, and the thickness of the hard substrate is 0.005mm to 1mm.

[0015] The pressure sensing structures are arranged in an array on the circuit board along its length.

[0016] The signal input terminals of the multiple pressure sensing structures are connected to a time-division multiplexing circuit, the first signal output terminals of the multiple pressure sensing structures are interconnected, the second signal output terminals of the multiple pressure sensing structures are interconnected, and the ground wires of the multiple pressure sensing structures are interconnected.

[0017] This application relates to a stapler, including a pressure sensing device and a staple cartridge. The pressure sensing device monitors the compressive force during the stapler's clamping process. The upper surface of the staple cartridge has staple grooves distributed therein. The pressure sensing device is disposed on at least one side of the upper surface of the staple cartridge along its length. The upper surface of the pressure sensing device is height-matched to the upper surface of the staple grooves, but the areas where the pressure sensing device and the staple grooves are located do not overlap. By integrating the pressure sensing device and the staple cartridge, this stapler can monitor the magnitude of the compressive force between the staple cartridge and human tissue in real time during the stapler's clamping process. The real-time changes in compressive force guide the surgeon in selecting the staple height, thereby improving the treatment effect of stapler suturing. Attached Figure Description

[0018] Figure 1 This is one of the structural schematic diagrams of a stapler shown according to an embodiment of this application;

[0019] Figure 2 This is a second schematic diagram of the structure of the stapler shown according to an embodiment of this application;

[0020] Figure 3 This is the third schematic diagram of the anastomosis device shown according to the embodiments of this application;

[0021] Figure 4 This is a schematic diagram of the pressure sensing device according to an embodiment of this application;

[0022] Figure 5 This is one of the structural schematic diagrams of the pressure sensing structure shown in the embodiments of this application;

[0023] Figure 6 This is one of the structural schematic diagrams of the pressure sensing structure shown in the embodiments of this application;

[0024] Figure 7 This is an equivalent circuit diagram of the pressure sensing structure shown in the embodiments of this application;

[0025] Figure 8 This is an equivalent circuit diagram of a pressure sensing device shown according to an embodiment of this application;

[0026] Figure 9 This is a graph showing the pressure sensing structure and voltage signal output according to an embodiment of this application. Detailed Implementation

[0027] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification.

[0028] In the following description, reference is made to the accompanying drawings, which illustrate several embodiments of the present application. It should be understood that other embodiments may also be used, and changes in mechanical composition, structure, electrical and operational aspects may be made without departing from the spirit and scope of the present application. The following detailed description should not be considered limiting, and the terminology used herein is for describing particular embodiments only and is not intended to limit the present application.

[0029] Although the terms first, second, etc., are used in some instances to describe various elements herein, these elements should not be limited by these terms. These terms are only used to distinguish one element from another.

[0030] Furthermore, 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 should be further understood that the terms “comprising,” “including,” indicate the presence of the stated feature, step, operation, element, component, item, kind, and / or group, but do not preclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms “or” and “and / or” as used herein are to be interpreted inclusively, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” Exceptions to this definition occur only when combinations of elements, functions, steps, or operations are inherently mutually exclusive in some way.

[0031] Figure 1 This is one of the structural schematic diagrams of a stapler shown according to an embodiment of this application. Figure 2 This is a second schematic diagram of the structure of the stapler shown according to an embodiment of this application. Figure 3 This is the third schematic diagram of the anastomosis device shown according to an embodiment of this application. Figures 1 to 3 As shown in the figure, this application provides a stapler, including a pressure sensing device 100 and a staple cartridge 200. The pressure sensing device 100 is used to monitor the squeezing force during the stapler clamping process. The upper surface of the staple cartridge 200 is distributed with a plurality of raised staple grooves 202. The pressure sensing device 100 is disposed on at least one side of the surface of the staple cartridge 200 along the length direction of the staple cartridge 200. The upper surface of the pressure sensing device 100 is height matched with the upper surface of the staple groove 202. The area where the pressure sensing device 100 and the staple groove 202 are located does not overlap.

[0032] When the stapler performs anastomosis on human tissue, it generates a squeezing force on the tissue. This squeezing force acts on the pressure sensing device 100 and is detected by it. In this embodiment, the stapler, through the integration of the pressure sensing device 100 and the staple cartridge 200, can monitor the squeezing force (i.e., the contact pressure between the staple cartridge 200 and the human tissue) in real time during the stapler's clamping process. Changes in the squeezing force guide the surgeon in selecting the staple height, allowing for real-time adjustments to the stapler's actions and improving the suturing effect.

[0033] Optionally, the pressure sensing device 100 includes a first part 104 and a second part 105, which are respectively disposed on both sides of the upper surface of the staple cartridge 200 along the length direction of the staple cartridge 200. Disposing the pressure sensing device 100 on both sides of the upper surface of the staple cartridge 200 prevents interference between the pressure sensing device 100 and the staple groove 202. In this way, the pressure sensing device 100 is integrated into the surface of the staple cartridge 200 of the stapler, and the pressure sensing device 100 does not affect the normal staple ejection of the stapler, realizing direct measurement of the tissue compression force of the stapler during suturing.

[0034] Optionally, the first part 104 and the second part 105 can be electrically connected. When the first part 104 and the second part 105 are electrically connected, the signal input circuit of the first part 104 is not connected to the signal input circuit of the second part 105, but is connected to a time-division multiplexing circuit. The first signal output circuit of the first part 104 is connected to the first signal output circuit of the second part 105, the second signal output circuit of the first part 104 is connected to the second signal output circuit of the second part 105, and the ground wire of the first part 104 is connected to the ground wire of the second part 105. In this way, by sharing the first signal output circuit, the second signal output circuit, and the ground wire between the first part 104 and the second part 105, the number of wires required for the pressure sensing device 100 can be reduced.

[0035] The pressure sensing device 100 is in close contact with the surface of the staple cartridge 200, and its thickness is aligned with the upper surface of the staple groove 202 of the staple cartridge 200, or may be slightly lower or slightly higher than the upper surface of the staple groove 202. For example, 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 0.5 mm. The overall thickness of the pressure sensing device 100 may be 0.2 mm to 1 mm to accommodate different types of staple cartridges 200.

[0036] like Figures 4 to 5As shown, the pressure sensing device 100 includes a circuit board 106 and a plurality of pressure sensing structures 101 distributed on the circuit board 106. Specifically, both the first part 104 and the second part 105 include a circuit board 106 and a plurality of pressure sensing structures 101 distributed on the circuit board 106. The pressure sensing structures 101 are arranged in an array along the length of the circuit board 106, and the plurality of pressure sensing structures 101 are parallel to each other. The pressure sensing device 100 is composed of a plurality of pressure sensing structures 101, the number of which can be determined depending on different situations. Each pressure sensing structure 101 can detect the pressing force at a corresponding position. The array-type pressure sensing structure 101 can measure the tissue pressing force in multiple areas. The plurality of pressure sensing structures 101 together form a pressing force cloud map of the entire stapler cartridge 200 plane.

[0037] The pressure sensing structure 101 includes a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4 connected to form a bridge circuit. The first resistor R1 and the third resistor R3 are strain-sensitive resistors. A single pressure sensing structure 101 contains at least four resistors, where the first resistor R1 and the third resistor R3 are strain-sensitive resistors whose resistance changes under pressure. These resistors can be pressure ink, a piezoresistive resistor, a strain gauge, an FSR (Force Sensing Resistor) resistive pressure sensor, or other strain-sensitive resistors. The second resistor R2 and the fourth resistor R4 can be strain-sensitive resistors or non-strain-sensitive resistors. Multiple resistors are connected through a conductive material 102 to form a current loop. The conductive material 102 can be carbon paste, silver paste, carbon nanotubes, graphene, etc.

[0038] like Figure 6 As shown, a rigid substrate 103 is provided at the locations of the second resistor R2 and the fourth resistor R4, with a thickness of 0.005 mm to 1 mm. The second resistor R2 and the fourth resistor R4 are fixed to the rigid substrate 103. When a pressing force is applied to the pressure sensing structure 101, the second resistor R2 and the fourth resistor R4, fixed to the rigid substrate 103, do not deform significantly under stress, and therefore their resistance values ​​remain unchanged. However, the first resistor R1 and the third resistor R3 undergo significant deformation under the pressing force, and their resistance values ​​change. By detecting the changes in 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 rigid substrate 103 depends on the magnitude of the pressing force to be detected and can be 0.005 mm to 1 mm. The material can be hard metal, hard plastic, ceramic, glass, etc.

[0039] In one embodiment, when the connection forms a bridge, 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, 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.

[0040] like Figure 7 As shown, in specific measurements, either V1 or V2 can be used as a voltage input terminal, and the other as a signal output terminal. If V1+ and V1- are used as voltage input points, then V2+ and V2- are used as signal output terminals. In this case, the first resistor R1 and the second resistor R2 are connected in series to form the first structure, and the third resistor R3 and the fourth resistor R4 are connected in series to form the second structure. The first and second structures are then connected in parallel, and vice versa. If V2+ and V2- are used as signal input points, then V1+ and V1- are used as voltage output terminals. In this case, the first resistor R1 and the fourth resistor R4 are connected in series to form the third structure, and the second resistor R2 and the third resistor R3 are connected in series to form the fourth structure. The third and fourth structures are then connected in parallel. When a pressing force is applied to the first resistor R1 and the third resistor R3, a variable voltage signal is generated, and this voltage output signal has a linear relationship with the magnitude of the pressing force. The magnitude of the pressing force can be deduced from the voltage value.

[0041] In one embodiment, the signal input terminals of the plurality of pressure sensing structures 101 are not interconnected but connected to a time-division multiplexing circuit. The first signal output terminals of the plurality of pressure sensing structures 101 are interconnected, the second signal output terminals of the plurality of pressure sensing structures 101 are interconnected, and the ground wires of the plurality of pressure sensing structures 101 are interconnected. It should be noted that the time-division multiplexing circuit uses time as the parameter for segmented transmission. Therefore, the circuit connection states of each pressure sensing structure 101 do not overlap on the time axis. That is, the circuits of each pressure sensing structure 101 are connected at different times, so that each pressure sensing structure 101 can output the voltage output signal of the stress it receives, without interference.

[0042] It is worth noting that a single pressure sensing structure 101 requires four leads, including two signal lines and two power lines. When multiple pressure sensing structures 101 exist, the number of signal and power lines increases, making wiring design difficult on the confined surface of the staple cartridge 200. Therefore, this application proposes a multiplexed pressing force measurement circuit to minimize the number of required leads. Please refer to... Figure 8 , Figure 8A measurement circuit consisting of three pressure sensing structures 101—a first pressure sensing structure 1041, a second pressure sensing structure 1042, and a third pressure sensing structure 1043—is shown. Measurement circuits with different numbers of pressure sensing structures 101 can be equivalently implemented. Vout+ and Vout- are two shared signal output terminals of the first pressure sensing structure 1041, the second pressure sensing structure 1042, and the third pressure sensing structure 1043, and their difference is linearly related to the magnitude of the force applied to the pressure sensing structure 101. Using a multiplexed measurement circuit effectively reduces the number of required leads, facilitating wiring design on the confined surface of the staple cartridge 200.

[0043] Specifically, the signal output terminals of different pressure sensing structures 101 are short-circuited to each other, resulting in only two signal output lines for multiple pressure sensing structures 101. The ground wires (GND) of the voltage input terminals of the pressure sensing structures 101 are short-circuited together. Measurement of different pressure sensing structures 101 can be achieved by controlling the voltage input terminals (Vin) of different pressure sensing structures 101. For example, when Vin1 is input, the signal output terminal is connected to the force on the first measurable pressure sensing structure 1041; when Vin2 is input, the signal output terminal is connected to the force on the second measurable pressure sensing structure 1042; when Vin3 is input, the signal output terminal is connected to the force on the third measurable pressure sensing structure 1043, and so on. When there are 3 pressure sensing structures 101 in the measurement circuit, only 6 leads are needed in total. Similarly, when there are N pressure sensing structures 101, only N+3 leads are needed. This design greatly improves the wiring utilization rate of the pressure sensing device 100.

[0044] The data acquisition of the pressure sensing device 100 is similar to that of the Wheatstone bridge differential signal acquisition. It can be displayed in real time after filtering, operational amplification, and analog-to-digital conversion. Figure 9 This is a graph showing the pressure sensing structure and voltage signal output according to an embodiment of this application. Figure 9 As shown, the horizontal axis represents the pressure value of the pressure sensing structure 101, and the vertical axis represents the output voltage of the pressure sensing structure 101. Experiments have shown that the magnitude of the force on the pressure sensing structure 101 and the voltage signal exhibit a high degree of linear correlation, enabling the pressure sensing structure 101 to accurately measure the pressing force.

[0045] The stapler of this application includes a pressure sensing device and a staple cartridge. The pressure sensing device monitors the compressive force during the stapler's clamping process. The upper surface of the staple cartridge has staple grooves distributed therein. The pressure sensing device is disposed on at least one side of the upper surface of the staple cartridge along its length. The upper surface of the pressure sensing device is height-matched to the upper surface of the staple grooves, but the area where the pressure sensing device and the staple grooves are located does not overlap. By integrating the pressure sensing device and the staple cartridge, the stapler of this application can monitor the magnitude of the compressive force between the staple cartridge and human tissue in real time during the stapler's clamping process. The real-time changes in compressive force guide the surgeon in selecting the staple height, improving the treatment effect of suturing with the stapler.

[0046] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A stapler, characterized in that, It includes a pressure sensing device and a staple cartridge. The pressure sensing device is used to monitor the squeezing force during the clamping process of the stapler. The upper surface of the staple cartridge has staple grooves. The pressure sensing device is disposed on at least one side of the upper surface of the staple cartridge along the length direction of the staple cartridge. The upper surface of the pressure sensing device is height-matched with the upper surface of the staple groove. The area where the pressure sensing device and the staple groove are located does not overlap. The pressure sensing device includes a first part and a second part, which are respectively disposed on both sides of the upper surface of the staple cartridge along the length direction of the staple cartridge; The pressure sensing device includes a circuit board and multiple pressure sensing structures distributed on the circuit board. The pressure sensing structures are arranged in an array along the length of the circuit board, and the multiple pressure sensing structures are parallel to each other.

2. The stapler according to claim 1, characterized in that, The signal input circuit of the first part is connected to the signal input circuit of the second part via a time-division multiplexing circuit. The first signal output circuit of the first part is connected to the first signal output circuit of the second part. The second signal output circuit of the first part is connected to the second signal output circuit of the second part. The ground wire of the first part is connected to the ground wire of the second part.

3. The stapler according to claim 1, characterized in that, The height difference between the upper surface of the pressure sensing device and the upper surface of the nail groove is less than or equal to 0.5 mm.

4. The stapler according to claim 1, characterized in that, The thickness of the pressure sensing device is 0.2mm to 1mm.

5. The stapler according to claim 1, characterized in that, The pressure sensing structure includes 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.

6. The stapler according to claim 5, characterized in that, 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. or, 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.

7. The stapler according to claim 5 or 6, characterized in that, A hard substrate is provided at the location of the second resistor and the fourth resistor, and the thickness of the hard substrate is 0.005mm to 1mm.

8. The stapler according to claim 5, characterized in that, The signal input terminals of the multiple pressure sensing structures are connected to a time-division multiplexing circuit, the first signal output terminals of the multiple pressure sensing structures are interconnected, the second signal output terminals of the multiple pressure sensing structures are interconnected, and the ground wires of the multiple pressure sensing structures are interconnected.

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