Device for preventing empty firing of surgical instrument
By using an infrared detection device in the electric stapler to detect whether the anvil is fully attached, the problem of empty firing in the prior art is solved, achieving high precision and rapid prevention of empty firing, and ensuring surgical safety and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2026-03-31
AI Technical Summary
Existing electric staplers lack effective anti-dry firing devices, which affects the safety and efficiency of surgery. Furthermore, existing devices have low detection accuracy and slow speed, which cannot guarantee the smooth progress of surgery.
An infrared detection device is used to detect whether the anvil is fully attached to the stapler head by setting an infrared absorbing coating or material on the connecting bushing. This controls the opening and closing of the motor circuit to ensure that the stapler fires only when the anvil is in place.
It achieves high-precision and rapid empty-fire detection, avoids accidental firing, ensures the safety and smooth progress of surgery, and reduces surgical costs and the risk of patient injury.
Smart Images
Figure CN224056026U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical devices, specifically a device for preventing the empty firing of surgical instruments. Background Technology
[0002] Anastomosing devices, as surgical instruments that replace traditional manual anastomosis, are widely used in surgical fields such as cardiothoracic surgery, gastrointestinal surgery, and urology. The working principle of an anastomosing device is similar to that of a stapler; it achieves tissue cutting, suturing, and functional reconstruction by firing implanted staples into the tissue.
[0003] During the anastomosis procedure, the operator clamps the tissue between the anvil and the staple cartridge, controls the movement of the anvil to clamp the tissue, and then fires the blade electrically or manually. The blade passes through the clamped tissue, and the staple pusher drives the staples through the clamped tissue to form a staple. The ends of the two cut tissues are then sutured together to complete the anastomosis procedure.
[0004] Anastomosing devices are broadly classified into manual and electric firing types. Only when the anvil and the working head of the device work together to compress the tissue can the cutting and closure components be activated. If a working head without an anvil or with the anvil not fully attached inside the working head is fired directly, a dry firing will occur. Accidental dry firing by the operator can lead to minor consequences, such as rendering the working head unusable and requiring replacement of the working head or the entire anvil, increasing surgical costs and preparation time. In severe cases, a dry firing can cause the staples to fall into other tissues, causing further injury to the patient and preventing the surgery from being completed in one attempt.
[0005] The anti-dry firing detection device is mainly used in electric staplers. The detection device can detect whether the anvil is fully attached to the working head of the stapler body and control the opening and closing of the firing circuit. Electric staplers equipped with the anti-dry firing detection device avoid dry firing during surgical preparation and operation, eliminate operator error firing, and ensure the safety and success of the operation.
[0006] Defects in existing technology and their causes:
[0007] 1. Currently, most electric staplers do not have a device to prevent dry firing, and rely mainly on the surgeon's clinical experience to prevent dry firing, which places high demands on the surgeon's experience.
[0008] 2. Some staplers are equipped with devices to prevent dry firing. These devices mainly rely on an elastic element at the bottom of the anastomosis assembly. The opening and closing of the circuit is controlled by the deformation of the elastic element. However, the detection response is inaccurate and slow. There is a possibility that the anvil may be attached to the working head, but the elastic element may not be deformed in time, resulting in failure to fire and making it impossible to guarantee the smooth operation of the surgery. Summary of the Invention
[0009] The purpose of this invention is to provide a device for preventing accidental firing of surgical instruments, aiming to prevent accidental firing of electric staplers and improve surgical safety.
[0010] The objective of this utility model is achieved through the following technical solution: a device for preventing dry firing of surgical instruments, comprising a stapler body and an anvil assembly disposed at the front port of the stapler body. The anvil assembly includes an anvil head for staple forming and a connecting bushing disposed at the rear side of the anvil head. An infrared detection device is provided inside the stapler body, and the infrared detection device is connected to the control circuit of the stapler body. An infrared transceiver is provided on the infrared detection device. When the infrared transceiver receives reflected infrared light, the control circuit disconnects the drive motor circuit; when the infrared transceiver does not receive reflected infrared light, the control circuit closes the drive motor circuit.
[0011] The outer wall of the connecting bushing is provided with an infrared absorbing part, which is a coating that can absorb infrared rays emitted by the infrared transceiver, or the infrared absorbing part is an embedded infrared absorbing material. When the anvil assembly is inserted into place, the infrared absorbing part on the connecting bushing faces the infrared transceiver.
[0012] Furthermore, the infrared detection device is provided with an output pin, and the control circuit of the anastomosis device is provided with a receiving terminal that is electrically connected to the output pin.
[0013] Furthermore, the coating or infrared absorbing material extends along the axial direction of the connecting bushing to form a sensing area with a certain width, and the infrared irradiation area of the infrared transceiver is smaller than the width of the sensing area.
[0014] Furthermore, the front boundary line of the sensing area corresponds to the minimum distance between the anvil assembly and the stapler body that can be fired; the rear boundary line of the sensing area corresponds to the maximum distance between the anvil assembly and the stapler body that can be fired.
[0015] Furthermore, the infrared absorbing material is ABS plastic or PC plastic.
[0016] Compared with the prior art, the advantages of this utility model are:
[0017] 1. The outer wall of the connecting bushing is coated with a coating that can absorb infrared rays. The light source and signal receiver of the infrared transceiver are located inside the stapler body. This allows for the detection of whether the anvil head is installed in place without affecting the strength and function of the structure, thus preventing accidental firing of the electric stapler.
[0018] 2. Infrared transceivers are not prone to failure, are unaffected by the environment, can respond quickly, and have high sensing accuracy.
[0019] 3. The coating on the connecting bushing has a certain width, and the front and rear coating lines can control the range of infrared light blocking, so that the stapler can only perform the firing operation within the limited staple gap, ensuring the smooth operation of the surgery. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of an embodiment of a device for preventing the empty firing of surgical instruments according to the present invention.
[0021] Figure 2 This is a schematic diagram of the disassembled state of a device used to prevent dry firing of surgical instruments.
[0022] Labeling: 1 Anvil assembly, 1-1 Anvil head, 1-2 Connecting bushing, 1-3 Coating, 2 Anastomosing device body, 3 Infrared detection device, 3-1 Infrared transceiver, 3-2 Output pin, 4 Fixed shaft, 5 Control circuit, 5-1 Receiving terminal. Detailed Implementation
[0023] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:
[0024] like Figures 1 to 2 The diagram shown is a schematic representation of an embodiment of a device for preventing the misfire of surgical instruments provided by this utility model.
[0025] A device for preventing dry firing of surgical instruments includes a stapler body 2 and an anvil assembly 1 located at the front port of the stapler body 2. The anvil assembly 1 includes an anvil head 1-1 for staple forming and a connecting sleeve 1-2 located on the rear side of the anvil head 1-1. The stapler body 2 is provided with a fixed shaft 4 that is inserted and engaged with the connecting sleeve 1-2. An infrared detection device 3 is provided inside the stapler body 2. The infrared detection device 3 is connected to the control circuit 5 of the stapler body 2. The infrared detection device 3 is provided with an infrared transceiver 3-1. When the infrared transceiver 3-1 receives reflected infrared light, the control circuit 5 disconnects the drive motor circuit; when the infrared transceiver 3-1 does not receive reflected infrared light, the control circuit 5 closes the drive motor circuit.
[0026] The outer wall of the connecting bushing 1-2 is provided with an infrared absorbing part. The infrared absorbing part is a coating 1-3 that can absorb infrared rays emitted by the infrared transceiver 3-1, or the infrared absorbing part is an embedded infrared absorbing material. When the anvil assembly 1 is inserted into place, the infrared absorbing part on the connecting bushing 1-2 faces the infrared transceiver 3-1. The infrared detection device 3 is provided with an output pin 3-2, and the control circuit 5 of the anastomosis device body 2 is provided with a receiving terminal 5-1 that is electrically connected to the output pin 3-2.
[0027] The coating 1-3 or infrared absorbing material extends along the axial direction of the connecting bushing 1-2 to form a sensing area with a certain width, and the infrared irradiation area of the infrared transceiver 3-1 is smaller than the width of the sensing area.
[0028] The front boundary line of the sensing area corresponds to the minimum distance between the anvil assembly 1 and the stapler body 2 that can be fired; the rear boundary line of the sensing area corresponds to the maximum distance between the anvil assembly 1 and the stapler body 2 that can be fired.
[0029] The working principle of this utility model is as follows:
[0030] The anvil assembly 1 is pushed into the stapler body 2, which has extended out of the fixed shaft 4, along the axial direction. After the connecting sleeve 1-2 is engaged with the fixed shaft 4, the connecting sleeve 1-2 can follow the retraction of the fixed shaft 4 and enter the interior of the stapler body 2.
[0031] When the anastomosis device body 2 is powered on, the internal infrared transceiver 3-1 continuously emits infrared rays and receives the reflected infrared rays.
[0032] The output pin 3-2 of the infrared detection device 3 is connected to the receiving terminal 5-1 of the control circuit 5 on the anastomosis device body 2. When the infrared light emitted by the infrared transceiver 3-1 can be reflected back and received without obstruction, the infrared detection device 3 transmits the signal to the control circuit. The circuit of the drive motor controlled by the control circuit is in the open state, and the anastomosis device cannot perform the firing operation. Only when the connecting sleeve 1-2 retracts into the interior of the anastomosis device body 2 along with the fixed shaft 4, and the infrared transceiver 3-1 is in the coating area 1-3 on the connecting sleeve 1-2, the infrared light emitted by the infrared transceiver 3-1 is completely absorbed by the coating area 1-3, and the infrared light cannot be reflected back. The transceiver has no response, the circuit of the drive motor controlled by the control circuit is in the closed state, and the anastomosis device can perform the firing operation.
[0033] The infrared detection device detects whether the anvil assembly 1 is installed in place, and transmits the detection signal to the control circuit. The control circuit controls whether the drive motor circuit is open or closed, so that the firing cannot be performed if the anvil assembly 1 is not fully installed, thus avoiding dry firing and ensuring the smooth operation of the surgery.
[0034] The coating 1-3 on the connecting bushing 1-2 has a certain width. When the infrared light emitted by the infrared transceiver 3-1 is not absorbed by the coating or is only partially absorbed, the infrared detection device 3 determines that the anvil assembly 1 is not installed in place, and the drive motor circuit is disconnected. When the rear coating line of the coating 1-3 moves to the position where the infrared light is just completely absorbed, the anvil assembly 1 is determined to be fully attached to the working head of the stapler body 2. At this time, the gap between the anvil head 1-1 and the cutting stapler assembly on the stapler body 2 is the maximum staple gap.
[0035] When the front coating line of coating 1-3 moves to the position where the infrared light is just completely absorbed, the gap between the anvil head 1-1 and the cutting and anastomosis components on the anastomosis device body 2 is the minimum staple gap.
[0036] By controlling the front and rear coating lines of coating 1-3, the staple gap can be strictly and precisely controlled to meet the squeezing and staple formation requirements of tissues of different thicknesses, making the surgery safer and more stable.
[0037] Correspondingly, coatings 1-3 can be replaced with materials that can absorb infrared radiation, such as ABS, PC, etc., which can absorb infrared radiation, on the connecting bushing. Their effect is the same as that of the coating.
[0038] Compared to mechanical structure detection methods, the air-firing detection sensor uses an infrared detection device to determine whether the anvil head 1-1 is properly attached. The infrared detection device boasts high precision, capable of detecting whether the anvil head 1-1 is fully attached to the working head of the stapler body 2 with millimeter-level accuracy. Because the infrared signal is unaffected by light intensity and the coating will not come into contact with other components and detach, the infrared detection device can reliably detect whether the anvil head 1-1 is properly attached in complex surgical environments, is less susceptible to interference, and exhibits high stability.
Claims
1. A device for preventing empty firing of a surgical instrument, comprising a stapler body (2) and a butt seat assembly (1) arranged at the front end of the stapler body (2), the butt seat assembly (1) comprising an anvil head (1-1) for forming of staple and a connecting shaft sleeve (1-2) arranged at the rear side of the anvil head (1-1), and the stapler body (2) is provided with a fixed shaft (4) for plug-in cooperation with the connecting shaft sleeve (1-2), characterized in that: the stapler body (2) is internally provided with an infrared detection device (3), the infrared detection device (3) is connected with a control circuit (5) of the stapler body (2), the infrared detection device (3) is provided with an infrared transceiver (3-1), when the infrared transceiver (3-1) receives reflected infrared rays, the control circuit (5) opens the driving motor circuit; when the infrared transceiver (3-1) cannot receive reflected infrared rays, the control circuit (5) closes the driving motor circuit; the outer wall of the connecting shaft sleeve (1-2) is provided with an infrared absorption part, the infrared absorption part is a coating (1-3) capable of absorbing infrared rays emitted by the infrared transceiver (3-1), or the infrared absorption part is an embedded infrared absorption material, when the butt seat assembly (1) is plugged into place, the infrared absorption part on the connecting shaft sleeve (1-2) is opposite to the infrared transceiver (3-1). The infrared detection device (3) is provided with an output pin (3-2), and the control circuit (5) of the stapler body (2) is provided with a receiving terminal (5-1) electrically connected with the output pin (3-2). The coating (1-3) or the infrared absorption material extends along the axial direction of the connecting shaft sleeve (1-2) to form an induction area with a certain width, and the infrared ray irradiation area of the infrared transceiver (3-1) is smaller than the width of the induction area.
2. The apparatus for preventing a dry fire of a surgical instrument of claim 1, wherein: The front boundary line of the induction area corresponds to the minimum distance at which the butt seat assembly (1) and the stapler body (2) can be fired; the rear boundary line of the induction area corresponds to the maximum distance at which the butt seat assembly (1) and the stapler body (2) can be fired.
3. The apparatus for preventing a surgical instrument from being fired without an object in the jaws of the instrument of claim 1, wherein: The infrared absorption material is ABS plastic or PC material plastic.
4. The apparatus for preventing a dry fire of a surgical instrument of claim 3, wherein: 5. The apparatus for preventing a dry fire of a surgical instrument of claim 1, wherein: