Multi-lumen visual catheter

Abstract

The present application relates to the technical field of medical devices, in particular to a multi-lumen visual catheter, comprising a catheter main body, an imaging assembly and a positive traction mechanism are arranged on the catheter main body, the positive traction mechanism comprises a traction balloon and two positioning balloons arranged on both sides of the traction balloon along the axial direction of the catheter main body, the traction balloon expands or shrinks along the axial direction of the catheter main body, the positioning balloons expand or shrink along the radial direction of the catheter main body, a filling and discharging pipeline is arranged in the catheter main body, and the filling and discharging pipeline is independently communicated with the traction balloon and the two positioning balloons. The multi-lumen visual catheter overcomes the defects of poor pushing, unstable positioning and single function of the existing lumen catheter, provides a visual catheter capable of active traction and accurate positioning, and improves the smoothness, safety and functionality of the operation in the lumen.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a multi-cavity visual catheter. Background Technology

[0002] Visual catheters play a vital role in minimally invasive examinations and treatments in human cavities (such as the intestines, bile ducts, and esophagus). Their structure can be referenced in the Chinese utility model patent with authorization announcement number CN222324087U, entitled "Visual Intestinal Obstruction Catheter." Traditional visual catheters rely primarily on external force to advance within human cavities. In areas with bends, narrow passages, or tortuous sections, they are prone to encountering significant resistance and obstructed progress, impacting treatment efficiency, increasing patient discomfort, and in some cases, failing to reach the target treatment area, thus affecting operational safety and reliability. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a multi-cavity visual catheter that can be actively pulled and precisely positioned to improve the smoothness, safety and functionality of intracavitary operations.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a multi-cavity visual catheter, including a catheter body, an imaging component and an active traction mechanism on the catheter body, the active traction mechanism including a traction balloon and two positioning balloons disposed on both sides of the traction balloon along the axial direction of the catheter body, the traction balloon expanding or contracting along the axial direction of the catheter body, the positioning balloons expanding or contracting along the radial direction of the catheter body, and an inflation / deflation channel provided inside the catheter body, the inflation / deflation channel being independently connected to the traction balloon and the two positioning balloons respectively.

[0005] Furthermore, the catheter body includes a handle section, an insertion section, and a working section. Both the handle section and the insertion section are provided with inflation and deflation channels. The handle section is connected to one end of the insertion section. A positioning balloon is connected to the other end of the insertion section and one end of the traction balloon, respectively. Another positioning balloon is connected to the other end of the traction balloon and the working section, respectively. The imaging component is set on the working section.

[0006] Furthermore, the charging and discharging pipeline includes a first pipeline, a second pipeline, and a third pipeline. The handle section is provided with a first interface, a second interface, and a third interface. The two ends of the first pipeline are respectively connected to the first interface and a positioning balloon. The two ends of the second pipeline are respectively connected to the second interface and a traction balloon. The two ends of the third pipeline are respectively connected to the third interface and another positioning balloon. The first interface, the second interface, and the third interface are all provided with valves.

[0007] Furthermore, the inflation / deflation pipeline includes a main pipe and branch pipes. One end of the main pipe extends out of the main body of the conduit from the handle section. The traction balloon and two positioning balloons are each connected to the main pipe through a branch pipe, and valves are provided on the branch pipes.

[0008] Furthermore, both the positioning balloon and the traction balloon include an elastic tube and a balloon body. The elastic tube of one positioning balloon is connected to the elastic tube and the insertion section of the traction balloon, respectively. The elastic tube of the other positioning balloon is connected to the elastic tube and the working section of the traction balloon, respectively. The balloon body is sleeved outside the elastic tube. The inflation / deflation tube extends into the elastic tube and passes through the tube wall of the elastic tube before communicating with the balloon body.

[0009] Furthermore, the main body of the balloon is cylindrical in shape, and the diameter of the main body of the traction balloon is smaller than that of the main body of the positioning balloon. The outer wall of the main body of the balloon is provided with an annular groove.

[0010] Furthermore, the elastic tube is provided with a groove, and the balloon body is provided with a buckle that engages with the groove.

[0011] Furthermore, both the grip section and the insertion section are equipped with tool channels, and the grip section, insertion section, and working section are all equipped with line channels.

[0012] The beneficial effects of this invention are as follows: A multi-lumen visual catheter addresses the problems of traditional catheters lacking active traction and positioning structures, which easily damage the lumen mucosa with repeated pushing and are prone to displacement during operation, affecting imaging stability and operational accuracy. The active traction mechanism of this invention adopts a balloon combination structure of "two-sided positioning + middle traction". The two positioning balloons expand radially and fit and fix against the inner wall of the lumen, which can realize the fixed positioning of the catheter in the lumen. The middle traction balloon expands / contracts axially, using axial deformation to generate traction force. By switching the expansion / contraction state of the traction balloon and the positioning balloon, the radial positioning and axial traction work together to drive the entire catheter to actively "peristally" move forward in the lumen, enabling the imaging component to perform inspection operations. The inflation and deflation tube provides an expansion / contraction medium delivery channel for the three balloons, realizing precise control of the expansion / contraction of the three balloons, replacing the traditional external force pushing, realizing the autonomous and smooth forward movement of the catheter in the lumen, and avoiding the problems of high pushing resistance and jamming. The multi-cavity visual catheter of the present invention overcomes the shortcomings of existing cavity catheters, such as poor advancement, unstable positioning, and limited functionality, and provides a visual catheter that can be actively pulled and precisely positioned, thereby improving the smoothness, safety and functionality of intracavitary operations. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a multi-lumen visual catheter; Figure 2 This is another structural diagram of a multi-lumen visual catheter; Figure 3 This is a partial schematic diagram of a multi-lumen visual catheter; Figure 4 A cross-sectional view of a multi-lumen visual catheter; Figure 5This is a schematic diagram of the positioning balloon. Figure 6 This is a schematic diagram of the main body of the catheter; Figure 7 This is another structural diagram of the catheter body; Label Explanation: 1. Catheter body; 11. Inflation / depression tubing; 111. First tubing; 112. Second tubing; 113. Third tubing; 114. Main tube; 115. Branch tube; 12. Handle section; 121. First interface; 122. Second interface; 123. Third interface; 13. Insertion section; 14. Working section; 2. Imaging assembly; 3. Active traction mechanism; 31. Traction balloon; 32. Positioning balloon; 321. Elastic tube body; 322. Balloon body. Detailed Implementation

[0014] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0015] Please refer to Figures 1 to 7 As shown, a multi-cavity visual catheter of the present invention includes a catheter body 1, an imaging component 2 and an active traction mechanism 3 on the catheter body 1, the active traction mechanism 3 includes a traction balloon 31 and two positioning balloons 32 disposed on both sides of the traction balloon 31 along the axial direction of the catheter body 1, the traction balloon 31 expands or contracts along the axial direction of the catheter body 1, and the positioning balloons 32 expand or contracts along the radial direction of the catheter body 1, the catheter body 1 is provided with an inflation / deflation channel 11, the inflation / deflation channel 11 is independently connected to the traction balloon 31 and the two positioning balloons 32 respectively.

[0016] The beneficial effects described above are as follows: The active traction mechanism 3 of the present invention adopts a balloon combination structure of "two-sided positioning + middle traction". After the two positioning balloons 32 expand radially, they fit and fix against the inner wall of the cavity, which can realize the fixed-point positioning of the catheter in the cavity. The middle traction balloon 31 expands / contracts axially, and generates traction force by using axial deformation. By switching the expansion / contraction state of the traction balloon 31 and the positioning balloon 32, the radial positioning and axial traction are combined to drive the entire catheter to actively "peristalse" forward in the cavity, so that the imaging component 2 can perform inspection operations. The inflation and deflation pipe 11 provides an expansion / contraction medium delivery channel for the three balloons, realizing precise control of the expansion / contraction of the three balloons, replacing the traditional external force push, realizing the autonomous and smooth forward movement of the catheter in the cavity, and avoiding the problems of large pushing resistance and jamming.

[0017] In an optional embodiment, the catheter body 1 includes a handle section 12, an insertion section 13, and a working section 14. Both the handle section 12 and the insertion section 13 are provided with inflation and deflation channels 11. The handle section 12 is connected to one end of the insertion section 13. A positioning balloon 32 is connected to the other end of the insertion section 13 and one end of the traction balloon 31, respectively. Another positioning balloon 32 is connected to the other end of the traction balloon 31 and the working section 14, respectively. The imaging component 2 is disposed on the working section 14.

[0018] The beneficial effects described above are as follows: the catheter body 1 is designed in segments, with a handle section 12 for operator hand-held control, an insertion section 13 for inserting into the cavity, and an imaging component 2 mounted on the working section 14 for visual observation; two positioning balloons 32 connect the insertion section 13, the traction balloon 31, and the working section 14, forming a continuous traction and positioning structure; the imaging component 2 is positioned at the front end of the working section 14 to ensure that the field of view covers the working area. The segmented structure conforms to ergonomics and cavity operation logic, making it convenient to hold and easy to insert; the front-mounted imaging component 2 ensures a clear field of view, the balloons are rationally arranged, and the traction and positioning functions are unobstructed, adapting to complex movement within the cavity.

[0019] In an optional embodiment, the charging / discharging pipe 11 includes a first pipe 111, a second pipe 112, and a third pipe 113. The handle section 12 is provided with a first interface 121, a second interface 122, and a third interface 123. The two ends of the first pipe 111 are respectively connected to the first interface 121 and a positioning balloon 32. The two ends of the second pipe 112 are respectively connected to the second interface 122 and a traction balloon 31. The two ends of the third pipe 113 are respectively connected to the third interface 123 and another positioning balloon 32. The first interface 121, the second interface 122, and the third interface 123 are all provided with valves.

[0020] The beneficial effects described above are as follows: the inflation / deflation pipeline 11 is divided into independent first, second, and third pipelines 113, corresponding to the two positioning balloons 32 and the traction balloon 31, respectively. The three interfaces of the handle section 12 are connected to each pipeline, and valves are installed at the interfaces to achieve independent inflation / deflation control of each balloon. The independent inflation / deflation pipeline 11 ensures that the actions of the three balloons do not interfere with each other, avoids media crossflow, and improves operational controllability; each balloon can be individually adjusted for expansion / contraction, resulting in high operational precision; the valves enable instant opening and closing of the channels, preventing media backflow and improving operational safety.

[0021] In an optional embodiment, the filling and discharging pipeline 11 includes a main pipe 114 and a branch pipe 115. One end of the main pipe 114 extends out of the main tube body 1 from the handle section 12. The traction balloon 31 and the two positioning balloons 32 are each connected to the main pipe 114 through a branch pipe 115. A valve is provided on the branch pipe 115.

[0022] The beneficial effects described above are as follows: The filling / discharging pipeline 11 adopts an integrated structure of "main pipe 114 + branch pipe 115". A single main pipe 114 extends from the handle section 12, and three branch pipes 115 are connected to three balloons respectively. The valves on the branch pipes 115 enable independent control of each balloon, simplifying the internal tubing layout of the catheter. The integrated tubing reduces the overall diameter of the catheter and lowers the insertion resistance of the lumen; the single main pipe 114 design simplifies the manufacturing process and reduces production costs, while retaining independent control functionality through the valves on the branch pipes 115.

[0023] In an optional embodiment, both the positioning balloon 32 and the traction balloon 31 include an elastic tube 321 and a balloon body 322. The elastic tube 321 of one positioning balloon 32 is connected to the elastic tube 321 of the traction balloon 31 and the insertion section 13, respectively. The elastic tube 321 of the other positioning balloon 32 is connected to the elastic tube 321 of the traction balloon 31 and the working section 14, respectively. The balloon body 322 is sleeved outside the elastic tube 321. The inflation / deflation pipe 11 extends into the elastic tube 321 and passes through the tube wall of the elastic tube 321 before communicating with the balloon body 322.

[0024] The beneficial effects described above are as follows: The balloon is composed of an elastic tube 321 and a balloon body 322. The elastic tube 321 serves as a supporting framework, connecting each segment of the catheter with adjacent balloons, ensuring the overall continuity of the catheter. The balloon body 322 is fitted over the elastic tube 321, and the inflation / deflation channel 11 passes through the wall of the elastic tube 321 and communicates with the balloon body 322, ensuring accurate delivery of the medium to the inside of the balloon. The elastic tube 321 enhances the overall flexibility and flexural strength of the catheter, adapting to bends in the lumen. The nested connection between the balloon body 322 and the elastic tube 321 provides a stable structure, preventing the balloon from falling off, and ensuring a reliable seal in the inflation / deflation channel with no risk of leakage.

[0025] In an optional embodiment, the balloon body 322 is cylindrical in shape, the diameter of the balloon body 322 of the traction balloon 31 is smaller than the diameter of the balloon body 322 of the positioning balloon 32, and the outer wall of the balloon body 322 is provided with an annular groove.

[0026] The beneficial effects described above are as follows: the main body of the balloon 322 is cylindrical, increasing the contact area with the inner wall of the cavity and improving positioning stability; the diameter of the traction balloon 31 is smaller than that of the positioning balloon 32, ensuring a gap between the traction balloon 31 and the inner wall of the cavity when the positioning balloon 32 contacts the inner wall of the cavity; the annular groove on the outer wall increases the friction between the balloon and the cavity mucosa, preventing slippage. The cylindrical balloon fits snugly against the inner wall of the cavity, making positioning more secure; the differential diameter design balances traction effect and cavity patency; the annular groove improves anti-slip performance and ensures effective transmission of traction action.

[0027] In an optional embodiment, the elastic tube 321 is provided with a slot, and the balloon body 322 is provided with a buckle that engages with the slot.

[0028] The beneficial effects described above are: the slot of the elastic tube 321 and the buckle of the balloon body 322 form a snap-fit ​​engagement, realizing the rapid assembly and firm connection of the balloon body 322 and the elastic tube 321. The elastic tube 321 and the balloon body 322 of appropriate shape and size can be selected as needed. The snap-fit ​​structure eliminates the need for additional bonding or welding, making assembly convenient and the connection stable. At the same time, it prevents the balloon from falling off during the expansion and contraction process, thus improving product reliability.

[0029] In an optional embodiment, both the grip section 12 and the insertion section 13 are provided with tool channels, and the grip section 12, the insertion section 13 and the working section 14 are all provided with line channels.

[0030] The beneficial effects described above are as follows: Traditional catheters are mostly single-cavity structures, capable of only basic delivery or imaging functions, and cannot simultaneously meet the needs of active traction, independent positioning, and parallel operation of multiple tools, making it difficult to satisfy the requirements of efficient and safe operation within complex cavities. In this invention, the handle section 12 and insertion section 13 are provided with tool channels for delivering tools for biopsy, drug administration, ablation, and other procedures; the three-section wiring channel is used to pass through the lead wires and signal lines of the imaging component 2, achieving separation of imaging and operational functions. The multi-cavity design enables visual observation and parallel operation of multiple tools, resulting in high functional integration; the channel separation avoids mutual interference between wiring and tools, ensuring stable imaging and smooth operation.

[0031] The multi-lumen visual catheter is equipped with a medical pneumatic / hydraulic controller. This controller is sealed to the inflation / deflation tubing interface of the handle section and has a built-in pressure sensor, solenoid valve and programmable logic controller (PLC). It can preset the timing parameters and pressure parameters of balloon inflation / contraction to achieve automated control.

[0032] Initial state: All balloons are in a contracted state, and the working section of the catheter is inserted into the body cavity to the initial position.

[0033] Step 1: Primary positioning. The controller fills the positioning balloon near the insertion section with medium until the pressure reaches 0.2MPa~0.3MPa. The positioning balloon expands radially and fits and fixes against the inner wall of the cavity. The pressure holding time is ≥1s.

[0034] Step 2: Axial traction. The controller fills the traction balloon with medium until the pressure reaches 0.1MPa~0.2MPa. The traction balloon expands axially along the direction of the cavity, and the expansion time is 2s~3s. This causes the positioning balloon near the working section and the working section to move 5mm~10mm in the forward direction.

[0035] Step 3: Secondary positioning. The controller fills the positioning balloon near the working section with medium until the pressure reaches 0.2MPa~0.3MPa. The positioning balloon expands radially and fits and fixes against the inner wall of the cavity. The pressure holding time is ≥1s.

[0036] Step 4: Reset and contract. The controller releases the medium from the positioning balloon and traction balloon near the insertion segment until the pressure drops to 0 MPa. The two balloons return to the contracted state, with a contraction time of 1 to 2 seconds, which moves the insertion segment forward by 5 to 10 mm.

[0037] Step 5: Cyclic advancement, repeat steps 1-4 to achieve autonomous and continuous "peristaltic" advancement of the catheter within the cavity. The advancement distance per cycle is 5mm~10mm, and the cycle frequency and advancement distance can be adjusted by the controller.

[0038] Please refer to Figures 1 to 7 As shown, Embodiment 1 of the present invention is as follows: The multi-lumen visual catheter includes a catheter body 1, which is divided into a handle section 12, an insertion section 13, and a working section 14. The handle section 12 is fixedly connected to one end of the insertion section 13, and the other end of the insertion section 13 is connected to a first positioning balloon 32. The end of the positioning balloon 32 away from the insertion section 13 is connected to a traction balloon 31. The end of the traction balloon 31 away from the positioning balloon 32 is connected to a second positioning balloon 32. The end of the second positioning balloon 32 away from the traction balloon 31 is connected to the working section 14. An imaging component 2 is fixedly installed at the front end of the working section 14.

[0039] Both the positioning balloon 32 and the traction balloon 31 are composed of an elastic tube 321 and a cylindrical balloon body 322. The elastic tube 321 of the first positioning balloon 32 is connected to the insertion section 13 and the elastic tube 321 of the traction balloon 31, respectively. The elastic tube 321 of the second positioning balloon 32 is connected to the elastic tube 321 of the traction balloon 31 and the working section 14, respectively. The balloon body 322 is sleeved on the outside of the elastic tube 321. The diameter of the balloon body 322 of the traction balloon 31 is smaller than the diameter of the balloon body 322 of the positioning balloon 32. Multiple annular grooves are opened on the outer wall of the balloon body 322.

[0040] The catheter body 1 has independent first pipe 111, second pipe 112 and third pipe 113 inside. The handle section 12 has a first interface 121, a second interface 122 and a third interface 123. Valves are installed in the first interface 121, the second interface 122 and the third interface 123. The first pipe 111 is connected at both ends to the first interface 121 and the balloon body 322 of the first positioning balloon 32. The second pipe 112 is connected at both ends to the second interface 122 and the balloon body 322 of the traction balloon 31. The third pipe 113 is connected at both ends to the third interface 123 and the balloon body 322 of the second positioning balloon 32. The inflation and deflation pipe 11 passes through the wall of the elastic tube 321 and is sealed and connected to the balloon body 322.

[0041] Tool channels are provided inside the grip section 12 and the insertion section 13, and wiring channels are provided inside the grip section 12, the insertion section 13 and the working section 14. The wires of the imaging component 2 are run through the wiring channels.

[0042] Working principle: During operation, the working section 14 of the catheter is inserted into the human cavity. Gas or liquid (such as medical sterile gas, physiological saline, etc.) is injected into the filling and discharging channel 11 through the first channel 111, the second channel 112, and the third channel 113 of the handle section 12. When the push is not smooth, the first positioning balloon 32 is controlled to expand radially and fit and fix against the inner wall of the cavity. Then, the traction balloon 31 is controlled to extend in the forward direction, supporting and driving the second positioning balloon 32 and the working section 14 forward. Subsequently, the second positioning balloon 32 is controlled to expand radially and fix, while the first positioning balloon 32 and the traction balloon 31 are contracted. The first positioning balloon 32 separates from the inner wall of the cavity, and the traction balloon 31 contracts axially, driving the insertion section 13 forward. The above actions are repeated to achieve the smooth and autonomous forward movement of the catheter. The imaging component 2 transmits images of the inside of the cavity in real time, and the tool channel can be used to insert working tools to complete the examination or treatment.

[0043] The multi-lumen visual catheter in this embodiment can achieve active traction and advancement of the catheter, solving the problem of poor pushing within the lumen; the independent tube precisely controls the balloon movement, ensuring firm positioning and efficient traction; the multi-lumen design takes into account both visualization and operational functions, making operation convenient and safe.

[0044] Please refer to Figures 1 to 7 As shown, the difference between Embodiment 2 and Embodiment 1 of the present invention is as follows: A single main tube 114 is installed inside the catheter body 1. One end of the main tube 114 extends out of the catheter body 1 from the handle section 12. The end of the main tube 114 inside the catheter is connected to three branch tubes 115. The three branch tubes 115 are respectively connected to the balloon bodies 322 of the two positioning balloons 32 and the traction balloon 31. Each branch tube 115 is equipped with an independent valve. The rest of the structure is completely the same as in Embodiment 1. The medium is injected uniformly through the main tube 114 outside the handle section 12, and the valve of the corresponding branch tube 115 is opened. The medium enters the target balloon through the branch tube 115, realizing the inflation and deflation control of a single balloon. Closing the valve can block the flow of medium and keep the balloon in an inflated state. The rest of the traction, positioning, imaging and operation principles are the same as in Embodiment 1. This embodiment simplifies the internal tubing layout of the catheter, reduces the overall outer diameter of the catheter, further reduces the insertion resistance of the cavity, and reduces the stimulation of the cavity mucosa. The single main tube 114 design reduces the processing difficulty and production cost, while retaining the independent control function of the balloon, solving the technical problems of complex tubing and large catheter diameter. In this embodiment, the conveying medium of the filling and discharging pipeline is medical sterile saline or medical sterile nitrogen; the working pressure range of the filling and discharging medium is 0.1MPa~0.3MPa, and the pressure holding accuracy is ±0.02MPa; the pressure resistance value at the connection seal between the filling and discharging pipeline and the balloon is not less than 0.5MPa, and there is no media leakage.

[0045] Please refer to Figures 1 to 7 As shown, Embodiment 3 of the present invention is as follows: A slot is formed on the outer wall of the elastic tube 321 of the positioning balloon 32 and the traction balloon 31. A buckle is integrally formed on the inner wall of the balloon body 322 to match the slot. The balloon body 322 is fixed to the outside of the elastic tube 321 by the buckle and the slot. The remaining structure is completely consistent with Embodiment 1. During assembly, the balloon body 322 is directly placed onto the elastic tube 321, and the buckle automatically engages with the slot to complete the fixation. During use, the force generated by the balloon's expansion and contraction is offset by the snap-fit ​​structure, preventing the balloon from shifting or falling off. The remaining traction positioning, inflation and deflation control, and operational imaging principles are the same as in Embodiment 1. Balloon assembly eliminates the need for adhesive bonding, improving production efficiency. The snap-fit ​​structure is more stable than nested connections, completely solving the problem of balloon detachment and shifting during repeated expansion and contraction, extending product lifespan, and improving operational safety.

[0046] Please refer to Figures 1 to 7 As shown, Embodiment 4 of the present invention is as follows: A sealed mounting groove is opened at the front end of the working section 14. The imaging component 2 is sealed and embedded in the mounting groove. The outside of the mounting groove is wrapped with a transparent flexible protective sleeve, which is seamlessly connected to the working section 14. A buffer sponge layer is pasted on the inner wall of the circuit channel, and the wires of the imaging component 2 are passed through the buffer sponge layer. The rest of the structure is completely the same as in Embodiment 1. The transparent protective sleeve does not affect the imaging field of view and avoids damage to the imaging lens by cavity secretions and mucous membranes. The buffer sponge layer absorbs the vibration generated by the advancement of the catheter and the movement of the balloon, preventing the wires from shaking and causing image blurring. The rest of the traction positioning and operating principle are the same as in Embodiment 1. It effectively isolates the cavity environment from the interference of the imaging component 2, eliminates image jitter caused by vibration, solves the technical problems of unstable imaging and easy lens contamination, and improves the accuracy of visual observation. The handle section is made of medical-grade ABS engineering plastic, the insertion section and the working section are made of medical-grade PTFE, the elastic tube body is made of medical-grade silicone rubber, and the balloon body is made of medical-grade polyurethane.

[0047] Please refer to Figures 1 to 7 As shown, Embodiment 5 of the present invention is as follows: The elastic tube 321 of the positioning balloon 32 and the traction balloon 31 is designed as a corrugated flexible structure, and the main body 322 of the balloon is designed as a spindle shape that is narrow at both ends and wide in the middle. Flexible folds are formed on the side wall of the main body 322 of the traction balloon 31. The rest of the structure is completely consistent with the aforementioned embodiment one. The corrugated elastic tube 321 improves the flexibility of the catheter and can bend freely with the curves of the cavity; the spindle-shaped balloon reduces the contact resistance when turning, and the flexible folds ensure that the traction balloon 31 can extend and contract axially without affecting radial bending, and can pass smoothly through the corners of the cavity during cyclic traction positioning. This improves the adaptability of the catheter to turning, solves the technical problems of difficult catheter movement in tortuous and corner cavities and balloon jamming, and expands the applicable range of the catheter.

[0048] The nominal diameter of the traction balloon is 8mm~10mm, the wall thickness is 0.3mm~0.5mm, the axial expansion rate is 150%~200%, the width of the annular groove is 2mm~3mm, and the depth is 0.5mm~0.8mm; The nominal diameter of the positioning balloon is 12mm~15mm, the wall thickness is 0.4mm~0.6mm, the radial expansion rate is 200%~250%, the width of the annular groove is 2mm~3mm, and the depth is 0.5mm~0.8mm; Overall nominal outer diameter of the catheter: 6mm~8mm; Tool channel (grip section / insertion section): nominal inner diameter 3mm~5mm; Line channel (entire section): Nominal inner diameter 1mm~2mm; Balloon snap-fit: The buckle and the slot are interference fit, with a fit clearance of 0.05mm~0.1mm.

[0049] Please refer to Figures 1 to 7 As shown, Embodiment Six of the present invention is as follows: The imaging component is a miniature endoscope camera module, which includes a lens, a CMOS image sensor, and a signal transmission module; Resolution: 1080P (1920×1080); Field of view: 120°~150°; Operating voltage: 3.3V, operating current: 50mA~80mA; Lens material: Sapphire (scratch-resistant and stain-resistant); Wire: Medical shielded wire, outer diameter 0.5mm~0.8mm.

[0050] Installation method: A sealed mounting groove is opened on the end face of the working section, and the imaging component is sealed and embedded in the mounting groove; Primary sealing: A medical-grade fluororubber O-ring is installed between the mounting slot and the imaging component; Secondary protection: The outside of the installation groove is wrapped with a medical-grade high-transmittance silicone rubber protective sleeve (transmittance ≥90%), and the protective sleeve is seamlessly sealed to the working section by ultrasonic welding process; Vibration damping structure: A buffer sponge layer (0.2mm~0.3mm thick) is pasted on the inner wall of the line channel, and the conductors are run through the sponge layer.

[0051] In summary, this invention, through a balloon mechanism of "radial positioning on both sides and axial traction in the middle," enables the catheter to move autonomously and smoothly within the body cavity, completely solving the problems of high resistance and poor advancement in traditional catheters. Independent or integrated inflation and deflation channels ensure precise and controllable balloon movement, with secure positioning and no slippage. The segmented catheter body, combined with a multi-cavity design, integrates visual observation and multi-tool operation functions, making it convenient to operate and comprehensive in function. Optimized balloon connections, imaging protection, and flexible bending structures further enhance the product's safety, stability, and applicability, making it suitable for minimally invasive examinations and treatments in various body cavities such as the intestines and bile ducts.

[0052] The above embodiments are only used to explain the technical solutions of the present invention and not to limit it. Although the above embodiments have provided specific descriptions of the present invention, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications and equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A multi-lumen visual catheter, characterized in that, The catheter body (1) includes an imaging component (2) and an active traction mechanism (3). The active traction mechanism (3) includes a traction balloon (31) and two positioning balloons (32) located on both sides of the traction balloon (31) along the axial direction of the catheter body (1). The traction balloon (31) expands or contracts along the axial direction of the catheter body (1), and the positioning balloons (32) expand or contracts along the radial direction of the catheter body (1). The catheter body (1) is provided with an inflation / deflation channel (11), which is independently connected to the traction balloon (31) and the two positioning balloons (32).

2. The multi-lumen visual catheter according to claim 1, characterized in that, The catheter body (1) includes a handle section (12), an insertion section (13) and a working section (14). Both the handle section (12) and the insertion section (13) are provided with inflation and deflation channels (11). The handle section (12) is connected to one end of the insertion section (13). A positioning balloon (32) is connected to the other end of the insertion section (13) and one end of the traction balloon (31). Another positioning balloon (32) is connected to the other end of the traction balloon (31) and the working section (14). The imaging component (2) is set on the working section (14).

3. The multi-lumen visual catheter according to claim 2, characterized in that, The charging and discharging pipeline (11) includes a first pipeline (111), a second pipeline (112) and a third pipeline (113). The handle section (12) is provided with a first interface (121), a second interface (122) and a third interface (123). The two ends of the first pipeline (111) are connected to the first interface (121) and a positioning balloon (32) respectively. The two ends of the second pipeline (112) are connected to the second interface (122) and a traction balloon (31) respectively. The two ends of the third pipeline (113) are connected to the third interface (123) and another positioning balloon (32) respectively. The first interface (121), the second interface (122) and the third interface (123) are all provided with valves.

4. The multi-lumen visual catheter according to claim 2, characterized in that, The filling and discharging pipeline (11) includes a main pipe (114) and a branch pipe (115). One end of the main pipe (114) extends out of the main body (1) of the catheter from the handle section (12). The traction balloon (31) and two positioning balloons (32) are each connected to the main pipe (114) through a branch pipe (115). A valve is provided on the branch pipe (115).

5. The multi-lumen visual catheter according to claim 2, characterized in that, Both the positioning balloon (32) and the traction balloon (31) include an elastic tube (321) and a balloon body (322). The elastic tube (321) of one positioning balloon (32) is connected to the elastic tube (321) and the insertion section (13) of the traction balloon (31) respectively. The elastic tube (321) of the other positioning balloon (32) is connected to the elastic tube (321) and the working section (14) of the traction balloon (31) respectively. The balloon body (322) is sleeved outside the elastic tube (321). The inflation and deflation tube (11) extends into the elastic tube (321) and passes through the tube wall of the elastic tube (321) before communicating with the balloon body (322).

6. The multi-lumen visual catheter according to claim 5, characterized in that, The balloon body (322) is cylindrical in shape. The diameter of the balloon body (322) of the traction balloon (31) is smaller than the diameter of the balloon body (322) of the positioning balloon (32). The outer wall of the balloon body (322) is provided with an annular groove.

7. The multi-lumen visual catheter according to claim 5, characterized in that, The elastic tube (321) is provided with a slot, and the balloon body (322) is provided with a buckle that engages with the slot.

8. The multi-lumen visual catheter according to claim 2, characterized in that, Both the grip section (12) and the insertion section (13) are equipped with tool channels, and the grip section (12), the insertion section (13) and the working section (14) are equipped with line channels.

Images