Endoscope and sheath waterjet treatment system

Abstract

This utility model relates to the field of minimally invasive medical technology and discloses an endoscope and sheath water jet treatment system, comprising: an insertion part integrating a camera system and a light source; a tubular sheath accommodating the insertion part, the proximal end of which has a connection port communicating with a negative pressure pump, and the distal end being a transparent blind end; multiple adsorption ports distributed circumferentially along the sidewall of the sheath, the adsorption ports forming a negative pressure channel with the connection port through the inner lumen of the sheath; and a water jet assembly including a water inlet pipe rotatably inserted through the forceps port of the insertion part, and a return pipe disposed in the inner lumen of the sheath; the distal end of the water inlet pipe is provided with a high-pressure water nozzle, and the proximal end is connected to the water jet system. Through high-definition image guidance, the lesion is precisely located. Utilizing the differences in tissue properties, a dynamic negative pressure field is formed by the spiral adsorption ports to achieve targeted adsorption. The adsorption force is adjusted to enhance the capture of diseased tissue and inhibit the traction of healthy tissue, thereby improving debridement efficiency while significantly reducing the incidence of complications and ensuring the safety of minimally invasive cavity treatment.

Description

Technical Field

[0001] This utility model relates to the field of minimally invasive medical technology, specifically to an endoscope and endoscope sheath water jet treatment system. Background Technology

[0002] Endoscopes, as core instruments in minimally invasive surgery, have been widely used in the diagnosis and treatment of diseases in cavities such as the digestive and urinary systems. However, traditional endoscopes mainly rely on mechanical forceps, high-frequency electrosurgical units, or lasers for tissue resection, which poses problems such as high risk of thermal damage, difficulty in controlling cutting depth, and postoperative tissue adhesion. To improve treatment safety, endoscope sheath water jet treatment systems have gradually emerged. These systems integrate water jet components and negative pressure adsorption functions through the sheath, achieving physical cold cutting and simultaneous fragment recovery. In traditional minimally invasive endoscopic surgery, tissue resection mostly relies on mechanical forceps, electrosurgical units, or laser technology.

[0003] However, current technology makes it difficult to distinguish the microscopic boundaries between diseased and healthy tissues, increasing the risk of mucosal damage and infection. Furthermore, it is difficult to achieve real-time, precise, and coordinated cutting, which affects the efficiency of debridement and the safety of minimally invasive treatment. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides an endoscope and sheath water jet treatment system, which solves the problem of difficulty in distinguishing the microscopic boundaries between diseased and healthy tissues, affecting debridement efficiency and the safety of minimally invasive treatment.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an endoscope and sheath water jet treatment system, comprising:

[0006] An insertion section, wherein a camera system and a light source are integrated within the insertion section;

[0007] The operation unit includes a control module and a human-machine interface. The control module is connected to the negative pressure pump and water jet assembly via cable or wireless signal to dynamically adjust the negative pressure adsorption intensity and water jet spray parameters.

[0008] The operation unit is communicatively connected to the camera system and the electronic endoscope for real-time synchronous feedback of image data and operation commands;

[0009] A tubular mirror sheath that can accommodate the insertion part has a connection port at its proximal end that communicates with a negative pressure pump, and a transparent blind end at its distal end;

[0010] The sheath has multiple adsorption ports distributed circumferentially on its sidewall, and these adsorption ports form a negative pressure channel with the connecting port through the inner cavity of the sheath tube.

[0011] The water jet assembly includes an inlet pipe rotatably inserted through the insertion port and a return pipe disposed within the inner cavity of the sheath.

[0012] The water inlet pipe is equipped with a high-pressure water nozzle at the far end and is connected to the water jet system at the near end.

[0013] By adopting the above technical solution, the distal end of the endoscope sheath adopts a transparent blind end design to ensure clear vision, and the proximal end is connected to the negative pressure pump through a sealed connection port to form a closed-loop adsorption channel. The spiral array adsorption ports distributed circumferentially on its side wall are linked with the negative pressure pump through the inner cavity of the sheath tube to realize tissue adsorption and fragment recovery. The water jet assembly has a rotatable water inlet pipe built into the insertion part through the clamp channel, and the distal high-pressure water nozzle completes the rotational cutting in the inner cavity of the sheath tube. At the same time, the independent spiral guide return pipe in the sheath tube realizes efficient waste liquid discharge.

[0014] Preferably, the transparent blind end of the sheath has a hemispherical structure with a light transmittance of ≥85% and is made of medical-grade polycarbonate.

[0015] By adopting the above technical solution, the hemispherical transparent blind end made of medical-grade polycarbonate has a light transmittance of ≥85%. While ensuring the clarity of the endoscope's wide-angle field of view, the hemispherical curvature design can reduce the frictional resistance when in contact with tissue. The blind end, together with the circumferential spiral adsorption port, the sheath lumen and the proximal negative pressure connection port, constitutes a fluid dynamics-optimized adsorption channel. Combined with the synergistic effect of the water jet component's rotating jet and the spiral flow of the return tube, a dynamic balance is achieved in tissue adsorption and positioning, precise cutting and fragment recovery, which significantly improves the efficiency and safety of minimally invasive surgery.

[0016] Preferably, the adsorption ports are arranged in a spiral array with a pore size of 0.8-1.2 mm and the spacing between adjacent adsorption ports is 3-5 times the pore size.

[0017] By adopting the above technical solution, the sidewall of the endoscope sheath preferably adopts a spiral array arrangement, and the distance between adjacent adsorption ports is 3 to 5 times the pore diameter. The layout parameters are optimized through fluid dynamics simulation to ensure the clinical requirements of adsorption force per unit area while avoiding negative pressure interference between adjacent adsorption ports. The spiral arrangement pattern and the spiral guide return tube in the sheath cavity form a composite flow channel. Under the drive of the negative pressure pump, the fluid path of tissue adsorption and waste liquid recovery exhibits a laminar flow enhancement effect, which increases the local flow velocity and reduces the risk of tissue debris blockage. Combined with the circumferential rotational cutting of the water jet assembly, a dynamic balance of adsorption, cutting, and recovery is achieved.

[0018] Preferably, the water inlet pipe includes:

[0019] The metal bend section can rotate 360°, and its bending radius matches the inner diameter of the mirror sheath;

[0020] Double-layer PTFE sealed bearing, located at the junction of the clamping port and the water inlet pipe.

[0021] By adopting the above technical solution, the metal bend section achieves full-circumferential, interference-free rotation of the water jet nozzle within the sheath by precisely matching the curvature of the sheath cavity. Meanwhile, the double-layer PTFE sealed bearing is integrated into the dynamic interface between the clamping port and the inlet pipe, maintaining zero leakage of high-pressure water flow. Combined with the negative pressure adsorption of the spiral adsorption port of the sheath and the synchronous flow guidance of the return pipe, a precise hydrodynamic cutting with spatial posture self-adaptation is formed.

[0022] Preferably, the end of the metal bend is provided with 3-5 radially distributed micro-nozzles, and the axis of each nozzle forms an angle of 15°-30° with the pipe body.

[0023] By adopting the above technical solution and verifying it through computational fluid dynamics simulation, the high-pressure water flow forms a three-dimensional conical cutting domain with a diameter of 3-5 mm inside the sheath, achieving the tissue cutting depth. Simultaneously, it matches the pulsed adsorption rhythm of the spiral adsorption port of the sheath, allowing the tissue fragments generated by the cutting to be discharged immediately through the spiral guide groove of the return pipe.

[0024] Preferably, the inner wall of the return pipe is provided with a spiral guide groove, and the pitch of the guide groove gradually decreases along the fluid direction.

[0025] By adopting the above technical solution, the spiral guide channel design features a gradually decreasing pitch along the fluid direction. Combined with the geometrically optimized guide surface structure and the negative pressure distribution characteristics of the sheath adsorption port, a fluid dynamic enhanced waste liquid transport path is formed. The gradually decreasing pitch design reduces flow resistance through acceleration effect. At the same time, the swirling kinetic energy generated by the spiral guide and the negative pressure attraction of the adsorption port work together to achieve efficient directional recovery of tissue fragments during high-pressure water jet rotary cutting.

[0026] Preferably, the connection port includes:

[0027] Quick-connect buckles allow for detachable connection to negative pressure pipelines;

[0028] A pressure sensor monitors the negative pressure value inside the sheath in real time.

[0029] By adopting the above technical solution and through modular functional integration design, the quick-connect buckle achieves plug-and-play connection with the negative pressure pipeline through redundant sealing structure, ensuring the convenience and airtightness of pipeline switching during operation. The embedded pressure sensor and the negative pressure pump control system form a closed-loop feedback mechanism, which tracks the pressure fluctuation in the inner cavity of the sheath in real time and dynamically adjusts the adsorption intensity, maintaining stable tissue adsorption force and avoiding tympanic membrane damage caused by negative pressure overload.

[0030] This utility model has the following beneficial effects:

[0031] 1. This utility model uses high-definition imaging to precisely locate lesions, utilizes differences in tissue properties, and forms a dynamic negative pressure field through the spiral adsorption port to achieve targeted adsorption. It regulates the adsorption force to enhance the capture of diseased tissue and inhibit the traction of healthy tissue, thereby improving the efficiency of debridement while significantly reducing the incidence of complications and ensuring the safety of minimally invasive cavity treatment.

[0032] 2. This utility model achieves 360° three-dimensional cutting without dead angles by driving radial micro-nozzles through a rotating metal bend tube. Combined with high-pressure water flow to precisely ablate lesions, it simultaneously utilizes the spiral guide groove of the sheath tube and the negative pressure environment to form a fluid synergy effect, thereby eliminating the risk of tissue residue and significantly improving the safety and efficiency of minimally invasive surgery in cavities. Attached Figure Description

[0033] Figure 1 This is a perspective view of the endoscope and sheath water jet treatment system of this utility model;

[0034] Figure 2 This is a partial structural diagram of the mirror sheath of this utility model.

[0035] Legend:

[0036] 1. Insertion part; 2. Grip opening; 3. Operating part; 4. Connection port; 5. Suction port. Detailed Implementation

[0037] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0038] Please see the appendix Figure 1 and attached Figure 2 This utility model provides an endoscope and sheath water jet treatment system, including:

[0039] Insertion section 1, which integrates a camera system and a light source;

[0040] The operation unit 3 includes a control module and a human-machine interface. The control module is connected to the negative pressure pump and water jet assembly via cable or wireless signal to dynamically adjust the negative pressure adsorption intensity and water jet spray parameters.

[0041] The operation unit 3 is connected to the camera system and the electronic endoscope for real-time synchronous feedback of image data and operation commands;

[0042] A tubular mirror sheath that can accommodate the insertion part 1 has a connection port 4 at its proximal end that communicates with a negative pressure pump, and a transparent blind end at its distal end.

[0043] Multiple adsorption ports 5 are distributed circumferentially on the side wall of the mirror sheath. The adsorption ports 5 form a negative pressure channel with the connecting port 4 through the inner cavity of the sheath tube.

[0044] The water jet assembly includes an inlet pipe that is rotatably inserted through the insertion part 1 through the clamping port 2, and a return pipe disposed in the inner cavity of the sheath tube;

[0045] The inlet pipe is equipped with a high-pressure water nozzle at the far end and is connected to the water jet system at the near end.

[0046] Specifically, through the collaborative design of an electronic endoscope with an integrated camera system and a detachable sheath, precise debridement of lesions within the cavity is achieved. The camera system and light source of the electronic endoscope provide a real-time visual operating field of view. The circumferential suction port 5 of the sheath directionally suctions the target tissue into the sheath lumen through a negative pressure channel. Combined with the high-pressure water flow of the water jet assembly, tissue cutting is completed in a closed space. At the same time, the return tube realizes the synchronous recovery of waste liquid and tissue. Thus, the necrotic tissue is selectively adsorbed by the difference in physical properties, and normal tissue is avoided by limiting the operating range of the water jet. Ultimately, a safe, efficient, and minimally invasive debridement treatment effect is achieved.

[0047] The transparent blind end of the sheath has a hemispherical structure with a light transmittance of ≥85% and is made of medical-grade polycarbonate.

[0048] Specifically, the transparent blind end of the endoscope sheath adopts a hemispherical structure and medical-grade polycarbonate material, which can provide an unobstructed field of vision for observing external tissues inside the sheath. At the same time, the smooth spherical contour reduces mechanical damage to normal tissues in the cavity. The high light transmittance of the transparent blind end ensures that the imaging system can clearly capture real-time images of the lesion area in the cavity. The hemispherical structure not only ensures the smoothness of the endoscope sheath when advancing in the cavity and protects normal tissues, but also provides physical isolation and protection for the water jet assembly to cut inside the sheath.

[0049] The adsorption ports 5 are arranged in a spiral array with a pore size of 0.8-1.2 mm and the spacing between adjacent adsorption ports 5 is 3-5 times the pore size.

[0050] Specifically, the adsorption ports 5 are arranged in a spiral array. The negative pressure adsorption range is optimized through a specific geometric layout to form a continuous and uniform adsorption force field. The spiral arrangement allows the adsorption ports 5 to cover the sheath evenly in the axial and circumferential directions, ensuring that necrotic tissue at different angles in the cavity can be effectively adsorbed into the sheath lumen. This improves the selectivity of tissue adsorption and the stability of operation, ultimately achieving a highly efficient and targeted debridement and full coverage of the lesion area.

[0051] The water inlet pipe includes:

[0052] The metal bend section can rotate 360°, and its bending radius matches the inner diameter of the mirror sheath;

[0053] A double-layer PTFE sealed bearing is located at the junction of the clamping port 2 and the water inlet pipe.

[0054] Specifically, the rotatable metal bend of the inlet pipe works in conjunction with the double-layer PTFE sealed bearing to enable the waterjet assembly to move flexibly in all directions within the sheath cavity. The 360° rotation capability of the metal bend allows the high-pressure water nozzle to cover all areas of the sheath cavity, ensuring a cut without blind spots. Meanwhile, the double-layer PTFE sealed bearing maintains the fluid seal at the clamping port 2 while ensuring the rotational freedom of the inlet pipe, preventing high-pressure water leakage from disrupting the negative pressure adsorption effect. This structural combination ensures both the dynamic adaptability of the waterjet operation and the overall stability and safety of the system.

[0055] The end of the metal bend is equipped with 3-5 radially distributed micro-nozzles, with the axis of each nozzle forming an angle of 15°-30° with the pipe body.

[0056] Specifically, the radial micro-nozzles at the end of the metal bend section expand the cutting coverage of the high-pressure water flow and control the spray direction through multi-angle water flow distribution. The radial layout of the nozzles, along with the angle between the nozzles and the tube axis, and the rotation function of the metal bend section, form a three-dimensional cutting mesh, ensuring that the tissue adsorbed into the sheath cavity is uniformly removed. At the same time, the tilted spray angle reduces the impact of the water flow on the inner wall of the endoscope sheath, avoiding damage to the instrument structure. This design achieves a dual balance between high-efficiency cutting and equipment self-protection, improving the overall controllability of the debridement operation.

[0057] The inner wall of the return pipe is provided with a spiral guide groove, and the pitch of the guide groove gradually decreases along the fluid direction.

[0058] Specifically, the spiral guide groove on the inner wall of the return pipe optimizes the fluid dynamics characteristics and improves the waste liquid recovery efficiency by gradually narrowing the spiral pitch. The gradually narrowing structure of the spiral guide groove guides the waste liquid and cutting debris to form a vortex flow along the pipe wall, enhancing the flow guidance and reducing turbulent resistance. At the same time, the gradient pitch gradually accelerates the fluid during the flow process, avoiding debris deposition. Through active control of fluid dynamics, it not only ensures the smooth discharge of waste, but also reduces the risk of blockage inside the return pipe.

[0059] Connection port 4 includes:

[0060] Quick-connect buckles allow for detachable connection to negative pressure pipelines;

[0061] A pressure sensor monitors the negative pressure value inside the sheath in real time.

[0062] Specifically, the quick-connect buckle of connector 4 works in conjunction with the pressure sensor to achieve efficient connection and safe monitoring of the negative pressure system. The quick-connect buckle, through a standardized interface design, ensures quick assembly and disassembly of the negative pressure pump and the endoscope sheath, improving ease of operation. The pressure sensor provides real-time feedback on the negative pressure status inside the sheath, dynamically adjusting the adsorption intensity to prevent excessive adsorption from damaging normal tissue, thus ensuring the stability and controllability of negative pressure adsorption. Furthermore, intelligent monitoring avoids the risk of abnormal pressure, ultimately achieving safety and smooth operation during the treatment process.

[0063] The outer surface of the insertion part 1 is provided with a silicone sealing ring that fits into the inner cavity of the sheath, and the compression of the sealing ring is 8% to 12% of the tube diameter.

[0064] Specifically, the silicone sealing ring on the outer surface of the insertion part 1 fits tightly with the inner cavity of the sheath through elastic deformation, preventing external liquid from seeping into the sheath and interfering with the imaging system during negative pressure adsorption, and allowing the insertion part 1 to move axially and rotate circumferentially within the inner cavity of the sheath.

[0065] Working principle: During treatment, the endoscope sheath enters the target area through natural cavities or wound channels. The insertion part 1 of the electronic endoscope extends into the sheath lumen, providing real-time image positioning through the camera system and transparent blind end. The negative pressure pump establishes a negative pressure environment through the connection port 4. The suction ports 5 arranged in a spiral array adsorb the target tissue into the sheath lumen, achieving selective adsorption by utilizing the difference in physical properties between necrotic and normal tissues. Afterward, the water inlet pipe of the water jet assembly drives the radial micro-nozzles to perform 360° coverage cutting through the rotating metal bend section. The high-pressure water flow directionally removes the adsorbed tissue. The waste liquid and debris generated during cutting are accelerated and discharged through the spiral guide groove of the return pipe. The negative pressure environment in the sheath lumen simultaneously enhances the waste liquid recovery efficiency.

[0066] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An endoscope and sheath water jet treatment system, characterized in that, include: An insertion part (1) is provided, which integrates a camera system and a light source; The operation unit (3) includes a control module and a human-machine interface. The control module is connected to the negative pressure pump and water jet assembly via cable or wireless signal to dynamically adjust the negative pressure adsorption intensity and water jet spray parameters. The operation unit (3) is connected to the camera system and the electronic endoscope for real-time synchronous feedback of image data and operation commands; A tubular mirror sheath that can accommodate the insertion part (1) has a connection port (4) connected to a negative pressure pump at its proximal end and a transparent blind end at its distal end; The sheath has multiple adsorption ports (5) distributed circumferentially on its sidewall. The adsorption ports (5) form a negative pressure channel through the inner cavity of the sheath tube and the connecting port (4). The water jet assembly includes an inlet pipe rotatably inserted through the insertion part (1) through the clamping port (2), and a return pipe disposed in the inner cavity of the sheath. The water inlet pipe is equipped with a high-pressure water nozzle at the far end and is connected to the water jet system at the near end.

2. The endoscope and sheath water jet treatment system according to claim 1, characterized in that, The transparent blind end of the sheath has a hemispherical structure with a light transmittance of ≥85% and is made of medical-grade polycarbonate.

3. The endoscope and sheath water jet treatment system according to claim 1, characterized in that, The adsorption ports (5) are arranged in a spiral array with a pore size of 0.8-1.2 mm and the spacing between adjacent adsorption ports (5) is 3-5 times the pore size.

4. The endoscope and sheath water jet treatment system according to claim 1, characterized in that, The water inlet pipe includes: The metal bend section can rotate 360°, and its bending radius matches the inner diameter of the mirror sheath; A double-layer PTFE sealed bearing is located at the junction of the pliers (2) and the water inlet pipe.

5. The endoscope and sheath water jet treatment system according to claim 4, characterized in that, The end of the metal bend is provided with 3-5 radially distributed micro-nozzles, with the axis of each nozzle forming an angle of 15°-30° with the pipe body.

6. The endoscope and sheath water jet treatment system according to claim 1, characterized in that, The inner wall of the return pipe is provided with a spiral guide groove, and the pitch of the guide groove gradually decreases along the fluid direction.

7. The endoscope and sheath water jet treatment system according to claim 1, characterized in that, The connection port (4) includes: Quick-connect buckles allow for detachable connection to negative pressure pipelines; A pressure sensor monitors the negative pressure value inside the sheath in real time.

8. The endoscope and sheath water jet treatment system according to claim 1, characterized in that, The outer surface of the insertion part (1) is provided with a silicone sealing ring that fits into the inner cavity of the sheath, and the compression of the sealing ring is 8% to 12% of the tube diameter.

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