Endoscope anti-fog device and endoscope with puncture and anti-fog functions

Abstract

The endoscope anti-fog device comprises a sleeve arranged on the outer side of an endoscope in a sleeving mode, a blowing cavity is formed by the sleeve and the side wall of the outer side of the endoscope, a blowing assembly is arranged at the operation end, the cross section of the blowing cavity is annular, a flow guide cavity is formed in the blowing cavity to guide the airflow shape, and the radial size of the blowing cavity is smaller than one tenth of the radius of the cross section of the endoscope. The endoscope with the puncture and anti-fog functions comprises the device and a puncture end. According to the device, the structural design is additionally arranged in the air blowing cavity, laminar flow is changed into turbulent flow gas, stains such as mist and blood on the surface of the lens are effectively removed, it is ensured that the endoscope lens is always kept highly clean, and the imaging quality is not interfered. Therefore, the risk of impacting human tissues is avoided. Meanwhile, the device is further integrated with a puncture outfit, the problem that puncture and endoscopic surgery operation of an existing puncture instrument are performed step by step is solved, operation complexity is avoided, and the risk of cross infection is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, and in particular to an endoscope anti-fogging device and an endoscope with puncture and anti-fogging functions. Background Art

[0002] In the field of modern medicine, endoscopy is a revolutionary advancement. It allows doctors to establish a channel through a puncture device and then directly observe the lesions deep inside the patient's body with an endoscope without performing major invasive surgery. Through the slender tube, the endoscope lens can reach hard-to-reach parts of the human body and transmit high-definition images to the display screen in real time, providing doctors with an intuitive and comprehensive in-vivo perspective, greatly improving the accuracy of diagnosis, postoperative aesthetics and treatment efficiency.

[0003] Although traditional endoscopes play an important role in the medical field, the problem of lens cleaning has always troubled medical staff. During traditional surgery or examination, the surface of the endoscope lens is very easy to adhere to body tissues, body fluids or other stains. These stains are not only difficult to clean, but also very easy to breed bacteria, increasing the risk of cross infection. More importantly, the adhesion of stains will seriously affect the imaging quality of the lens, causing blurred, distorted or shadowed images, thereby interfering with the doctor's accurate judgment of the condition. Therefore, those skilled in the art have tried to prevent fogging of the lens by temperature control, eliminating near-infrared stray light and blowing methods. The blowing method often has a sleeve outside the endoscope, and the gas of the blowing tube is controlled by a valve, and the fluid is used to take away the fog in front of the lens, the tissue and blood that block the field of view. Although the blowing method is low in cost, it is not widely used. Because doctors need to control the valve to blow, but they are not very familiar with valves and flow control, and the anti-fog effect of gas flow at normal temperature and pressure is not ideal, and the fog attached to the lens cannot be effectively removed. However, turning the valve wide to increase the gas flow and flow rate without restraint sometimes creates the risk of damaging patient tissues. Summary of the invention

[0004] According to the first and second embodiments of the present invention, in order to solve the above-mentioned deficiencies in the prior art, an endoscope anti-fogging device is provided, comprising a sleeve mounted on the outside of the endoscope, the sleeve and the outer side wall of the endoscope forming a blowing cavity, the blowing component is arranged at the operating end, the blowing component comprises a switch and an air inlet, the switch controls the gas to be transported to one end of the endoscope lens through the blowing cavity, the cross-section of the blowing cavity is annular, and the radial dimension of the blowing cavity is less than one tenth of the radius of the cross-section of the endoscope.

[0005] Preferably, a flow-guiding cavity is provided on the outer side wall of the endoscope or the inner side wall of the sleeve, and the gas flows along the shape of the flow-guiding cavity.

[0006] Preferably, the flow-guiding cavity is arranged on the outer side wall of the endoscope, and the flow-guiding cavity comprises at least one thread groove, and the thread groove spirally extends with the outer side wall of the endoscope as the parent surface.

[0007] Preferably, the flow-guiding cavity comprises two thread grooves, and the two thread grooves are in the shape of double-start reverse threads.

[0008] Preferably, the helix angle of the thread groove is 28-36 degrees.

[0009] Preferably, the flow-guiding cavity comprises a plurality of gas extrusion grooves, the central axes of the gas extrusion grooves are parallel to the central axis of the sleeve, and the widths of the gas extrusion grooves gradually decrease in the direction from the operating end to the endoscope lens.

[0010] Preferably, the width ratio of the gas extrusion groove at the gas inlet end to the gas outlet end is 5:1.

[0011] Preferably, the angle between the side wall of the gas extrusion groove and the central axis of the gas extrusion groove is 12-20 degrees.

[0012] Preferably, on the plane where the cross section of the sleeve is located, the bottom cross section of the gas extrusion groove is in a right angle or arc shape.

[0013] According to the endoscope anti-fog device of an embodiment of the present invention, the device can convert the laminar gas of the prior art into turbulent gas near the lens by adding a structural design in the blowing cavity. This special airflow pattern can effectively remove stains such as fog, blood, and tissue fragments on the lens surface, ensuring that the endoscope lens always remains highly clean and the imaging quality is not disturbed. At the same time, compared with the traditional blowing method, the high pressure of the turbulent gas is concentrated and released near the lens surface, avoiding the risk of high-speed airflow directly impacting human tissue and ensuring the safety of the surgical process. Even in high-demand cleaning scenarios, it can protect surrounding tissues from damage while ensuring the cleaning effect, reducing surgical risks. By pre-calculating the structure designed with parameters such as gas flow rate and pressure, it is not necessary to control the gas valve in real time during surgery, which reduces the doctor's operating burden during the operation and improves the doctor's surgical experience.

[0014] According to the third embodiment of the present invention, in order to solve the problem that puncture by puncture instruments and endoscopic surgical operations are performed in steps, an endoscope with puncture and anti-fog functions is provided, comprising an endoscope, an endoscope anti-fog device is provided on the outside of the endoscope, and a puncture end is provided at the end of the sleeve away from the blowing component, and the puncture end punctures human tissue.

[0015] According to an embodiment of the present invention, an endoscope with puncture and anti-fog functions is combined with the first embodiment device with the existing endoscope in consideration of convenience in practical applications, and is further integrated with the puncture device. The anti-fog device itself does not require substantial modification of the existing equipment, and its processing and maintenance costs are relatively low. Furthermore, the existing puncture instrument puncture and endoscopic surgery operations are performed in steps, which avoids cumbersome operations and reduces the risk of cross infection.

[0016] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a first embodiment of a flow-guiding cavity of an endoscope anti-fog device according to an embodiment of the present invention;

[0018] Figure 2 It is a schematic diagram of a second embodiment of the flow-guiding cavity of the anti-fog device for endoscope according to an embodiment of the present invention;

[0019] Figure 3 is an overall schematic diagram of an endoscope anti-fogging device according to a third embodiment of the present invention;

[0020] Figure 4 Schematic diagram of internal gas storage tanks according to the first, second and third embodiments of the present invention. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings to further illustrate the present invention.

[0022] First, combine Figures 1 to 4 The endoscope anti-fogging device according to the embodiment of the present invention is widely used in minimally invasive surgery, laparoscopic surgery, ENT surgery, oral surgery, endoscopic examination and other scenarios. In this embodiment, it is particularly suitable for anti-fogging, defogging, and stain removal of endoscopes with an endoscope radius of 1mm to 8mm, and laparoscopic surgery is used as an example for explanation.

[0023] The anti-fogging device for endoscopes according to the first and second embodiments of the present invention has an overall structure as shown in FIG. Figure 3As shown, the difference between it and the third embodiment is only whether the end of the sleeve 1 includes a puncture end 6. Specifically, the endoscope anti-fogging device includes a sleeve 1 that is sleeved on the outside of the endoscope to form a closed or semi-closed space surrounding the endoscope. This is the basic structure for achieving gas blowing and lens anti-fogging. The sleeve 1 and the outer side wall of the endoscope form a blowing cavity 11, which is a gas channel; the blowing component 2 is arranged at the operating end 31. The blowing component 2 is responsible for generating and controlling the flow of gas. It is usually installed in a position that is convenient for doctors to operate, such as on an operating handle. The blowing component 2 includes a switch 21 and an air inlet 22. The switch 21 controls the gas to be delivered to one end of the endoscope lens 32 through the blowing cavity 11. In the prior art, this switch 21 is usually a gas valve. During the operation, the doctor can adjust the valve to increase the size of the gas flow.

[0024] Specifically, the cross-section of the blowing cavity is annular. The design of the annular blowing cavity enables the gas to be evenly distributed around the endoscope lens 32. The radial dimension of the blowing cavity 11 is less than one tenth of the radius of the endoscope cross-section. The smaller size of the blowing cavity 11 combined with the annular shape of the air outlet can produce a higher gas flow rate and pressure, forming an annular high-pressure laminar flow and producing a jet effect, thereby more effectively removing stains and fog on the lens surface.

[0025] Preferably, if Figure 1 , 2 As shown, a flow-guiding cavity is provided on the outer side wall of the endoscope or the inner side wall of the sleeve 1, and the gas flows along the shape of the flow-guiding cavity. The flow-guiding cavity is provided to guide the gas to flow along a specific path, thereby stimulating turbulence on the basis of laminar flow. Turbulence has stronger mixing and cleaning capabilities, and can more effectively remove stubborn stains on the lens surface. At the same time, through the carefully designed flow-guiding cavity, it can be ensured that turbulence is only stimulated near the lens, avoiding unnecessary interference with distant tissues. Based on the empirical cleaning threshold, the concentrated airflow impacts the lens surface, and the maximum flow rate v≥20m / s. According to the parameters of the prior art, the Reynolds number Re>4000 required to form turbulence is derived, and the flow rate at this time needs v>588m / s. The realization based on the prior art is not realistic. It is currently difficult to increase the pressure to the required flow rate for the blowing component 2, and it is necessary to greatly increase the complexity of the structure and the boosting components. Even if it is achieved, the impact pressure and relative speed friction on human tissue will cause damage, seriously affecting the safety of the operation. Therefore, by providing a flow-guiding cavity on the outer side wall of the endoscope or the inner side wall of the sleeve 1, turbulence can be formed through structural changes while the flow rate meets the threshold value of human safety.

[0026] The first embodiment of the flow-guiding cavity:

[0027] Preferably, if Figure 1As shown, the flow-guiding cavity is arranged on the outer side wall of the endoscope, and its processing cost is less than that on the inner side wall of the sleeve 1. Specifically, the flow-guiding cavity includes at least one thread groove 51, and the thread groove 51 spirally extends with the outer side wall of the endoscope as the parent surface. Designing the flow-guiding cavity into the shape of the thread groove 51 can guide the gas to flow along the spiral path and generate a rotating airflow. This rotating airflow has a centrifugal effect, which can increase the local flow velocity near the lens and improve the cleaning efficiency. At the same time, the design of the thread groove 51 also increases the contact area between the gas and the lens surface.

[0028] Preferably, if Figure 1 As shown, the flow-guiding cavity includes two thread grooves 51, and the two thread grooves 51 are double-ended reverse threaded. The design of two double-ended reverse thread grooves 51 can generate additional shear force in the airflow. This shear force helps to break the laminar flow state and promote the generation of turbulence. Turbulence has a stronger disturbance ability and can more effectively remove tiny stains and fog on the lens surface.

[0029] Preferably, the helix angle of the thread groove 51 is 28-36 degrees. Controlling the helix angle of the thread groove 51 within the range of 28-36 degrees can balance the axial and tangential velocity components of the airflow. This balance helps to ensure that the gas forms a stable and efficient clean airflow near the lens while reducing direct impact on surrounding tissues.

[0030] The second embodiment of the flow-guiding cavity:

[0031] It can be arranged on the outer side wall of the endoscope or on the inner side wall of the sleeve 1. Preferably, the flow-guiding cavity is arranged on the outer side wall of the endoscope. In the second embodiment, as shown in FIG. Figure 2 As shown, the flow-guiding cavity specifically includes a plurality of gas extrusion grooves 52, the central axis of the gas extrusion groove 52 is parallel to the central axis of the sleeve 1, and the width of the gas extrusion groove 52 gradually decreases along the direction from the operating end 31 to the endoscope lens 32. The groove width gradually decreases along the direction from the operating end 31 to the endoscope lens 32, and the flow rate and pressure of the gas can be gradually adjusted. Since the width of the entrance end is greater than the outlet end, the gas will be subject to gradually decreasing space restrictions when passing through the groove, and thus forced to compress. When the gas is ejected at a certain angle, it will more easily exert a lateral force on the surface of the endoscope lens. This design helps to form a high-pressure, high-speed clean airflow near the lens, while reducing interference with distant tissues.

[0032] Preferably, if Figure 2 As shown, the width ratio of the gas extrusion groove 52 at the gas inlet end and the gas outlet end is 5:1. By precisely controlling the width ratio, the energy of the input gas can be more effectively utilized, unnecessary energy loss can be reduced, the efficiency ratio can be optimized, and a balance between effective cleaning and no harm to human tissue can be achieved.

[0033] Preferably, if Figure 2 As shown, the angle between the side wall of the gas extrusion groove 52 and the central axis of the gas extrusion groove 52 is 12-20 degrees. The appropriate angle design allows the gas to turn more smoothly when flowing in the groove, reduces the flow resistance, and seeks the best balance between the balancing turbulence effect and the effective gas injection pressure.

[0034] Preferably, on the plane where the cross section of the sleeve 1 is located, the bottom cross section of the gas extrusion groove 52 is right-angled or arc-shaped. Designing the bottom cross section of the flow-guiding cavity to be rectangular can optimize the distribution and stability of the airflow, and the gas extrusion groove 52 has a stronger effect of increasing the local flow velocity and a better injection effect, but the turbulence formation effect is not as good as the threaded groove 51. The bottom of the groove is designed to be in an arc shape to help the formation of turbulence, taking into account both cleaning efficiency and surgical safety.

[0035] Preferably, if Figure 3 , 4 As shown, the switch 21 is a button, and the blowing assembly 2 also includes a gas storage tank 23 connected to the blowing cavity 11, and sealing rings 24 are respectively provided at both ends of the gas storage tank 23. The clean gas source commonly used in the prior art for storing and releasing gas in medical devices is adopted, but when it is specifically applied to this embodiment, the size design of the parts and the selection of the spring elastic force are adaptively designed according to the specific scene of the application (specific surgical scene, etc.), specifically: during the button rebound process, the gas enters the gas storage tank 23 and fills the gas storage tank 23, and the button is pressed, and the gas storage tank 23 releases the gas therein into the blowing cavity 11. The doctor only needs to press the button once to start the gas blowing, and it is automatically inflated during the button rebound process. It should be further explained that the spring rebound time of the button of this embodiment and the air intake volume of the air inlet are designed according to the preset gas volume threshold. Specifically, in combination with the structure of the guide cavity and the lens size, the airflow velocity, pressure and Reynolds value threshold (key parameter for exciting turbulence) required for a single cleaning are adaptively derived, and the volume threshold of each air intake is further derived, which is the preset gas volume threshold. By presetting the gas volume, when using this embodiment, the doctor only needs one simple press operation to automatically adjust and maintain the optimal gas flow, without having to be distracted by controlling the valve or adjusting the flow during the operation, thereby greatly simplifying the operation process, allowing the doctor to focus more on the operation itself, and improving the accuracy and efficiency of the operation.

[0036] Above, refer to Figures 1 to 4An endoscope anti-fog device according to an embodiment of the present invention is described. The device can convert the laminar gas of the prior art into turbulent gas near the lens by adding a structural design in the blowing cavity 11. This special airflow pattern can effectively remove stains such as fog, blood, and tissue fragments on the lens surface, ensuring that the endoscope lens 32 always remains highly clean and the imaging quality is not disturbed. At the same time, compared with the traditional blowing method, the high pressure of the turbulent gas is concentrated and released near the lens surface, avoiding the risk of high-speed airflow directly impacting human tissue and ensuring the safety of the surgical process. Even in high-demand cleaning scenarios, it can protect surrounding tissues from damage while ensuring the cleaning effect, reducing surgical risks. By pre-calculating the structure designed with parameters such as gas flow rate and pressure, it is not necessary to control the gas valve in real time during surgery, which reduces the doctor's operating burden during the operation and improves the doctor's surgical experience.

[0037] Secondly, combined Figure 3 According to the third embodiment of the present invention, in order to solve the problem that the puncture instrument puncture and endoscopic surgery are performed in steps, an endoscope with puncture and anti-fog functions is provided, comprising an endoscope, an endoscope anti-fog device is arranged outside the endoscope, and a puncture end 6 is arranged at the end of the sleeve 1 away from the blowing component 2, and the puncture end 6 punctures human tissue. This multi-functional design greatly improves the efficiency and safety of the operation.

[0038] Above, refer to Figures 1 to 4 The endoscope with puncture and anti-fog functions according to the third embodiment of the present invention is described. Considering the convenience in practical application, the first embodiment device is combined with the existing endoscope and further integrated with the puncture device. The anti-fog device itself does not require a major modification of the existing equipment, and its processing and maintenance costs are relatively low. Furthermore, the existing puncture instrument puncture and endoscopic surgery operations are performed in steps, which avoids cumbersome operations and reduces the risk of cross infection.

[0039] When in use, there is no need to replace the instrument after the trocar pierces the human tissue. The position of the endoscope relative to the trocar end is adjusted to the position where the doctor needs to present the image. The gas forms an annular high-pressure laminar flow in the blowing cavity, and through the guidance of the flow-guiding cavity (such as threaded grooves, gas extrusion grooves, etc.), a rotation or extrusion effect is generated, realizing the conversion from laminar flow to turbulent flow and directional impact, directly acting on the surface of the endoscope lens, removing stains and fog locally, and keeping the lens clear.

[0040] In the description of the present invention, it should be noted that, unless otherwise specified, “plurality” means two or more than two; the orientations or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “inner”, “outer”, “top”, and “bottom” are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] It should be noted that, in this specification, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0042] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

Claims

1. An endoscope anti-fogging device, comprising a sleeve sleeved on the outside of an endoscope, wherein the sleeve and the outer side wall of the endoscope form a blowing cavity, and a blowing component is arranged at an operating end 3, and the blowing component comprises a switch and an air inlet, wherein the switch controls the gas to be delivered to one end of the endoscope lens through the blowing cavity, characterized in that: The cross section of the blowing cavity is annular, and the radial dimension of the blowing cavity is smaller than one tenth of the radius of the cross section of the endoscope.

2. The endoscope anti-fogging device according to claim 1, characterized in that: A flow-guiding cavity is provided on the outer side wall of the endoscope or the inner side wall of the sleeve, and the gas flows along the shape of the flow-guiding cavity.

3. The endoscope anti-fogging device according to claim 2, characterized in that: The flow-guiding cavity is arranged on the outer side wall of the endoscope, and the flow-guiding cavity comprises at least one thread groove, and the thread groove spirally extends with the outer side wall of the endoscope as the parent surface.

4. The endoscope anti-fogging device according to claim 3, characterized in that: The flow-guiding cavity comprises two thread grooves, and the two thread grooves are in the shape of double-start reverse threads.

5. The endoscope anti-fogging device according to claim 4, characterized in that: The helix angle of the thread groove is 28-36 degrees.

6. The endoscope anti-fogging device according to claim 2, characterized in that: The flow-guiding cavity comprises a plurality of gas extrusion grooves, the central axes of the gas extrusion grooves are parallel to the central axis of the sleeve, and the widths of the gas extrusion grooves gradually decrease along the direction from the operating end to the endoscope lens.

7. The endoscope anti-fogging device according to claim 6, characterized in that: The width ratio of the gas extrusion groove at the gas inlet end to the gas outlet end is 5:

1.

8. The endoscope anti-fogging device according to claim 7, characterized in that: The angle between the side wall of the gas extrusion groove and the central axis of the gas extrusion groove is 12-20 degrees.

9. The endoscope anti-fogging device according to any one of claims 6 to 8, characterized in that: On the plane where the cross section of the sleeve is located, the bottom cross section of the gas extrusion groove is in a right angle or arc shape.

10. An endoscope with puncture and anti-fogging functions, comprising an endoscope, characterized in that: The endoscope is provided with an endoscope anti-fogging device according to any one of claims 1 to 9 on the outside, and a puncture end is provided at the end of the sleeve away from the blowing assembly, and the puncture end punctures human tissue.

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