Electronic choledochoscope

Abstract

The utility model relates to the field of medical apparatus and instruments, disclose a kind of electronic choledochoscope, the choledochoscope includes head end, curved part, insertion part, operating part and connecting part, head end is equipped with first pressure sensor for real-time monitoring internal pressure;Insertion part includes mirror body pipe and the sleeve tube that can be moved along its axial direction, sleeve tube front end is equipped with balloon, balloon inner wall is equipped with second pressure sensor for real-time monitoring balloon expansion pressure;Operating part is equipped with sleeve tube control mechanism and balloon pressurization interface of the control sleeve tube movement.The utility model provides into support by movable sleeve, realizes safe controllable expansion by balloon pressure monitoring, guarantees the pressure stability in operation by head end pressure monitoring, effectively solve the problem that choledochoscope enters biliary duct difficultly, support is insufficient, expansion damage and pressure out of control, improve the safety and efficiency of operation.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an electronic cholangioscope. Background Technology

[0002] With the development of minimally invasive surgical techniques, electronic cholangioscopy, due to its advantages such as small diameter, flexibility, and clear imaging, has been widely used in the diagnosis and treatment of biliary system diseases, such as cholangioscopic lithotripsy, stone removal, biliary stent placement, biliary stricture dilation and incision. Current electronic cholangioscopy typically consists of a tip, a bending section, an insertion section, an operating section, and a connecting section. The tip is equipped with a camera module and a light source, and the bending section uses a serpentine frame for angle adjustment.

[0003] However, existing electronic cholangioscopy systems still have the following technical problems in clinical practice:

[0004] 1. When a cholangioscope needs to enter the common bile duct or intrahepatic bile duct from the cystic duct, it is often obstructed by the closed spiral valve of the cystic duct, making it difficult or even impossible for the cholangioscope to enter.

[0005] 2. The insertion part of the cholangioscope is relatively long, and it is not supported enough when moving in the body, making it easy to bend. It is difficult for doctors to accurately control the direction of the scope, especially when entering the branch bile duct.

[0006] 3. For large-diameter common bile duct stones, dilation of the cystic duct is often required before stone removal. However, current dilation procedures are often performed blindly without real-time pressure feedback, which can easily cause excessive damage to the smooth muscle and spiral valve of the cystic duct, affecting the patient's postoperative recovery.

[0007] 4. During intraoperative irrigation and aspiration of waste fluid, the pressure inside the bile duct may be too low or too high due to improper operation. Too low a pressure will affect the field of vision and irrigation effect, while too high a pressure may cause serious complications such as bile duct damage, spread of infection, or even bile duct perforation.

[0008] Therefore, there is an urgent need for an electronic cholangioscope that can provide support for cholangioscope insertion, safe dilation, and controllable intraoperative pressure. Utility Model Content

[0009] The present invention aims to overcome at least one of the above-mentioned defects of the prior art and provide an electronic cholangioscope. The cholangioscope provides entry support through a movable cannula, achieves safe expansion through balloon pressure monitoring, and ensures intraoperative pressure safety through tip pressure monitoring, thereby solving the problems of difficult entry of the cholangioscope, insufficient support, expansion damage, and uncontrolled pressure.

[0010] To achieve the above objectives, this utility model provides the following technical solution: an electronic cholangioscope, comprising a tip, a bending section, an insertion section, an operating section, and a connecting section; the tip is provided with a first pressure sensor for real-time monitoring of pressure within the patient's body; the insertion section includes a scope tube and a cannula movable along the axial direction of the scope tube, the front end of the cannula being provided with an inflatable balloon, and the inner wall of the balloon being provided with a second pressure sensor for real-time monitoring of the balloon's expansion pressure; the operating section is provided with a cannula control mechanism for controlling the movement of the cannula, and a pressurization interface for filling the balloon with an expansion medium; the first pressure sensor and the second pressure sensor are electrically connected and / or signal connected to an external host.

[0011] Preferably, the axial sliding stroke of the sleeve is sufficient to cover at least the length of the bend, so that the bend can be wrapped within it when the sleeve moves forward.

[0012] Preferably, the cannula control mechanism includes an unlockable positioning structure for selectively locking the cannula at multiple positions on the endoscope tube. Specifically, the cannula control mechanism includes a button, a clip, and a spring. The endoscope tube has a slot, and the clip, supported by the spring, engages in the slot to fix the position of the cannula. When the button is pressed, the clip disengages from the slot, allowing the cannula to move along the endoscope tube.

[0013] Preferably, the first pressure sensor and the second pressure sensor are connected to an external host through independent signal channels. The host is equipped with a display unit that displays the internal pressure and the balloon dilation pressure, respectively, so that doctors can monitor the two types of pressure at the same time.

[0014] Preferably, the first pressure sensor can be a miniature piezoresistive, capacitive, or fiber optic pressure sensor, integrated within the head end, and transmits the pressure signal to the external host via a signal line within the connector. This sensor directly contacts the internal environment, reflecting real-time pressure changes within the bile duct.

[0015] Preferably, the second pressure sensor can be a thin-film pressure sensor, a fiber optic pressure sensor, or a miniature pneumatic sensor, attached to the inner surface of the balloon, and transmits the pressure signal to the external host through a wire inside the cannula. The second pressure sensor can provide real-time pressure feedback during balloon inflation, helping doctors precisely control the inflation force.

[0016] Preferably, the travel of the sleeve should at least cover the length of the bend to ensure effective support for the bend as the sleeve moves forward. In some embodiments, the sleeve travel may further cover part of the insertion portion to enhance overall support rigidity. When the sleeve moves to its foremost position, its inner wall adheres to the outer wall of the endoscope tube, forming a rigid support to prevent the bend and the insertion portion from bending when passing through narrow areas.

[0017] Preferably, the balloon can be a compliant, semi-compliant, or non-compliant balloon, and its shape can be cylindrical, spherical, or eccentric to adapt to different anatomical structures, with its maximum expanded diameter matching the target bile duct diameter. This application allows for the selection of balloons of appropriate sizes based on different anatomical structures and lesion conditions.

[0018] Preferably, the operating part is further provided with a Luer connector that communicates with the inside of the endoscope tube for connecting a rinsing or suction device.

[0019] Those skilled in the art should understand that the first pressure sensor and the second pressure sensor serve different safety control objectives: the former is used to prevent pressure abnormalities caused by intraoperative irrigation / suction, and the latter is used to prevent over-expansion damage during balloon dilation. The two work together to improve surgical safety.

[0020] Preferably, a sealing structure is provided between the sleeve and the endoscope tube to prevent liquid from entering the gap between them, ensuring smooth operation and avoiding contamination.

[0021] Compared with the prior art, the beneficial effects of this utility model include:

[0022] 1. This invention provides effective support through a movable balloon dilation cannula, solving the problem of difficult insertion. Specifically, the cannula of this invention can move axially along the endoscope tube. When it is necessary to enter the common bile duct from the cystic duct, the cannula can be moved forward to wrap around the curved portion and part of the insertion portion, thereby providing additional rigid support for the cholangioscope. The automatic locking structure of the cannula control mechanism allows for one-handed operation, enabling the doctor to easily apply pushing force to push the cholangioscope into the common bile duct, avoiding the problem of traditional cholangioscopes bending and being difficult to control in the body due to insufficient support.

[0023] 2. This invention achieves safe and controllable expansion through real-time monitoring of the balloon's expansion pressure. A thin-film pressure sensor is installed on the inner surface of the balloon, which monitors the pressure between the balloon and the bile duct wall in real time during expansion. The doctor can precisely control the inflation volume based on the pressure reading, avoiding complications such as smooth muscle tearing and spiral valve damage caused by blind expansion, thus improving surgical safety.

[0024] 3. This invention ensures stable intraoperative pressure by real-time monitoring of the pressure at the tip of the device. The miniature pressure sensor at the tip continuously monitors the pressure within the patient's body, especially during irrigation or suction procedures. Doctors can adjust the irrigation flow rate or suction negative pressure promptly based on the pressure readings to prevent excessively high or low pressure within the bile duct, thus avoiding damage to the patient's tissues and organs and reducing the risk of postoperative complications.

[0025] 4. This utility model integrates multiple functions such as support, expansion, and pressure monitoring onto the same cholangioscope, avoiding the cumbersome operation of frequently changing instruments during surgery, shortening the operation time, reducing patient trauma, and improving surgical efficiency.

[0026] 5. This utility model achieves safer, more efficient, and more controllable cholangioscopy through the coordinated operation of the movable cannula, the balloon pressure monitoring, and the tip pressure monitoring: the forward movement of the cannula provides support for passing through narrowed areas; the balloon dilation pressure monitoring ensures safe dilation; and the tip pressure monitoring continuously ensures pressure safety throughout the entire operation.

[0027] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0028] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0029] Figure 1 This is a schematic diagram of the overall structure of an electronic cholangioscope with a balloon dilation cannula and pressure monitoring capability according to the present invention.

[0030] Figure 2 for Figure 1 A schematic diagram of the main components of the head end;

[0031] Figure 3 for Figure 1 Enlarged structural diagram of the middle insertion section;

[0032] Figure 4 for Figure 1 A diagram showing the state where the insertion part is pushed towards the head end and locked in a certain position;

[0033] Figure 5 for Figure 1 The diagram shows the balloon in its inflated state.

[0034] Figure 6 This is a schematic diagram showing the cooperation between the sleeve control mechanism and the middle part of the insertion section in a preferred embodiment of the present invention;

[0035] The same or similar reference numerals in the accompanying drawings represent the same or similar structures.

[0036] Reference numerals: 1-Head end, 111-Camera module, 112-LED light source, 113-First pressure sensor, 114-Instrument channel outlet, 2-Bend, 3-Insertion, 31-Endoscope tube, 32-Cannula, 33-Balloon, 34-Second pressure sensor, 4-Operating part, 41-Pressure interface, 42-Cannula control mechanism, 43-Button, 44-Card, 45-Spring, 46-Slot, 47-Luer connector, 48-Seal, 5-Connecting part. Detailed Implementation

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

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the following description is only a preferred embodiment of the present invention and does not constitute a limitation on the scope of protection of the present invention.

[0039] Please refer to Figures 1 to 6 According to one aspect of this application, an electronic cholangioscope is provided, the electronic cholangioscope having a balloon dilatation cannula and a pressure sensor for monitoring pressure, including a head end 1, a bending part 2, an insertion part 3, an operating part 4, and a connecting part 5. The head end 1 is provided with a first pressure sensor 113 for monitoring internal pressure; the insertion part 3 includes a scope tube 31 and a cannula 32 sleeved outside the scope tube 31, the cannula 32 being movable axially along the scope tube 31, the front end of the cannula 32 being provided with an inflatable balloon 33, the inner wall of the balloon 33 being provided with a second pressure sensor 34 for monitoring the balloon 33 expansion pressure; the operating part 4 is provided with a cannula control mechanism 42 for controlling the movement of the cannula 32 and selectively locking it, and a pressurization interface 41 for filling the balloon 33 with an expansion medium; the first pressure sensor 113 and the second pressure sensor 34 are connected to an external host via signal lines.

[0040] Preferably, the travel of the sleeve 32 should at least cover the length of the bend 2 to ensure effective wrapping support for the bend 2 as the sleeve 32 moves forward. In some embodiments, the travel of the sleeve 32 may further cover part of the insertion portion 3 to enhance overall support rigidity. When the sleeve 32 moves to its foremost position, its inner wall adheres to the outer wall of the mirror tube 31, forming rigid support and preventing the bend 2 and the insertion portion 3 from bending when passing through narrow sections.

[0041] Preferably, the sleeve control mechanism 42 includes an unlockable positioning structure for selectively locking the sleeve 32 at multiple positions on the endoscope tube 31.

[0042] Preferably, the first pressure sensor 113 and the second pressure sensor 34 are respectively connected to an external host through independent signal channels, and the host is provided with a display unit that displays the internal pressure and the inflation pressure of the balloon 33 respectively.

[0043] Preferably, the first pressure sensor 113 is integrated into the head end 1, and the second pressure sensor 34 is attached to the inner surface of the balloon 33 and connected to the signal line through a wire embedded in the wall of the sleeve 32.

[0044] Preferably, the cannula control mechanism 42 includes a button 43, a clip 44, and a spring 45. The endoscope tube 31 has a slot 46. The clip 44, supported by the spring 45, engages in the slot 46 to fix the position of the cannula 32. When the button 43 is pressed, the clip 44 disengages from the slot 46, allowing the cannula 32 to move along the endoscope tube 31. This structure allows for one-handed operation, facilitating quick adjustment and automatic locking of the cannula 32 by the surgeon as needed during surgery. In some embodiments of this invention, the cannula control mechanism 42 can employ existing structures such as a button type, rotary type, magnetic type, or elastic snap type, as long as it enables the movement and selective locking of the cannula 32.

[0045] Preferably, the first pressure sensor 113 can be a miniature piezoresistive, capacitive, or fiber optic pressure sensor, integrated within the tip 1, and transmits the pressure signal to an external host via a signal line within the connecting portion 5. This sensor directly contacts the internal environment, reflecting real-time pressure changes within the bile duct. Preferably, the second pressure sensor 34 can be a thin-film pressure sensor, a fiber optic pressure sensor, or a miniature pneumatic sensor, attached to the inner surface of the balloon 33, and transmits the pressure signal to an external host via a wire inside the cannula 32. This sensor can provide real-time pressure feedback during balloon 33 expansion, helping doctors precisely control the expansion force.

[0046] Preferably, the balloon 33 can be a compliant balloon, a semi-compliant balloon, or a non-compliant balloon, and its shape can be cylindrical, spherical, or eccentric to adapt to different anatomical structures. Its maximum diameter after expansion matches the diameter of the target bile duct. A balloon 33 of appropriate size can be selected according to different anatomical structures and lesion conditions.

[0047] Preferably, a sealing structure is provided between the sleeve 32 and the mirror tube 31 to prevent liquid from entering the gap between them.

[0048] Preferably, the operating part 4 is further provided with a Luer connector 47 that communicates with the inside of the endoscope tube 31 for connecting a rinsing or suction device.

[0049] Specifically, according to a preferred embodiment of this application, an electronic cholangioscope with a balloon dilation cannula and pressure monitoring capability is provided, including a tip 1, a bending portion 2, an insertion portion 3, an operating portion 4, and a connecting portion 5. The tip 1 may be equipped with an image module 111, an LED light source 112, a first pressure sensor 113, and an instrument channel outlet 114, all electrically and / or signal-connected. The first pressure sensor 113 may be a miniature pressure sensor, mounted on the front or side surface of the tip 1, in direct contact with the patient's internal environment, for real-time monitoring of intrabiliary pressure.

[0050] The bending section 2 can be composed of a snake bone and an elastic sheath for wrapping the snake bone. The connection method and material of the snake bone can be achieved using existing technologies applicable to the field of medical devices. The bending angle of the snake bone can be controlled by existing control components and connection methods such as the angle knob on the operating section 4 to adjust the field of view of the cholangioscope.

[0051] The insertion part 3 may include a scope tube 31 and a sleeve 32. The scope tube 31 is preferably a flexible tube, and its interior may have a working channel for accommodating the camera module 111, light source, signal lines, etc. The sleeve 32 is sleeved on the outside of the scope tube 31, and the inner diameter of the sleeve 32 can substantially fit the outer periphery of the scope tube 31. The sleeve 32 can slide along the axial direction of the scope tube 31. Further, a balloon 33 is fixed to the front end of the sleeve 32. The balloon 33 can be made of an inflatable medical polymer material, and a second pressure sensor 34 (e.g., a thin-film pressure sensor) can be attached to its inner surface. The balloon 33 is connected to the pressurization interface 41 on the operation part 4 through an inflation channel provided in the wall of the sleeve 32. The pressurization interface 41 can be connected to an inflation device (such as a syringe or pressure pump) through a standard Luer connector 47. The first pressure sensor 113 can transmit signal to the external host via a signal line built into the endoscope tube 31 through the connecting part 5. The signal line of the second pressure sensor 34 can also be led along the inside of the sleeve 32 to the operation part 4, and then transmitted to the host via the connecting part 5. The proximal end of the balloon 33 can be sealed and fixed to the outer wall of the front end of the sleeve 32 by heat fusion or adhesive bonding. The distal end of the balloon 33 can be a free end. During inflation, the balloon 33 gradually expands from the distal end to the proximal end.

[0052] The operating unit 4 is equipped with a cannula control mechanism 42 and several functional components. Further, the cannula control mechanism 42 includes a button 43, a clip 44, and a spring 45, wherein the materials and structures of the button 43, clip 44, and spring 45 can be implemented using existing technologies applicable to this application. Multiple slots 46 are provided on the outer wall of the endoscope tube 31. The clip 44, under the elastic force of the spring 45, engages with the corresponding slot 46, thereby fixing the cannula 32 in a certain position. When the doctor presses the button 43, the clip 44 moves downwards and disengages from the slot 46, at which point the cannula 32 can be pushed back and forth along the endoscope tube 31. After releasing the button 43, the spring 45 causes the clip 44 to re-engage with the current slot 46, achieving automatic locking. This structure allows the doctor to move and position the cannula 32 with one hand, making operation convenient. It should be noted that the sleeve control mechanism 42 in this embodiment adopts a button-type locking structure, but in other embodiments, existing rotary locking sleeves, elastic buckles or magnetic positioning structures can also be used, as long as the sleeve 32 can be selectively fixed after sliding along the lens tube 31.

[0053] The axial sliding stroke of the cannula 32 should be at least equal to the length of the bend 2 to ensure that the cannula 32 can completely wrap around the bend 2 when it moves forward. After the bend 2 is wrapped, the rigid structure of the cannula 32 can resist the natural bending tendency of the bend 2, providing effective axial support for the cholangioscope. The rigid structure of the cannula 32 can be implemented using existing medical device materials suitable for this application.

[0054] The operating unit 4 is equipped with a Luer connector 47, which can be used to connect structures such as irrigation or suction tubing to inject saline or aspirate waste fluid during the operation.

[0055] The connecting part 5 may include connecting cables and electrical connectors for connecting signals and power supply lines of devices such as the camera module 111, LED light source 112, first pressure sensor 113, and second pressure sensor 34 to an external host. The front end face of the head end 1 has a mounting hole, in which the first pressure sensor 113 is embedded. Its sensing surface is flush with or slightly protrudes from the front end face of the head end 1, and the sensor body is sealed and fixed to the head end 1 with medical adhesive. The second pressure sensor 34 can be attached to the inner wall of the balloon 33 using medical silicone. Its lead extends along the inner wall of the balloon 33 to the front end of the sleeve 32, passes through a pre-set wire channel within the sleeve 32 wall, and is led along the sleeve 32 wall to the operating part 4, and then connected to the external host via the connecting part 5.

[0056] When performing surgery using the electronic cholangioscope of this embodiment, the following steps can be followed:

[0057] 1. In the initial state, the cannula 32 is located at the rear end of the insertion part 3, and the balloon 33 is in an uninflated state.

[0058] 2. The choledochoscope is inserted through the cystic duct. When it encounters obstruction at the spiral valve of the cystic duct, the doctor presses button 43 and pushes the cannula 32 forward, allowing the tip of the cannula 32 to pass over the bend 2 until the balloon 33 is close to the tip 1. Releasing button 43 causes the card 44 to automatically engage with the slot 46, locking the cannula 32 in place. At this point, the cannula 32 covers the bend 2 and part of the insertion section 3, providing rigid support for the choledochoscope and preventing it from bending under thrust.

[0059] 3. With the support of the cannula 32, the doctor can easily push the choledochoscope into the common bile duct.

[0060] 4. If dilation of the cystic duct is required to remove larger stones, keep the cannula 32 in place and inject gas or liquid into the balloon 33 through the pressurization port 41, causing the balloon 33 to gradually inflate. During inflation, the second pressure sensor 34 monitors the pressure inside the balloon 33 in real time and displays the pressure value on the main unit screen. The doctor adjusts the inflation volume according to the pressure value to inflate the balloon 33 to the appropriate diameter, avoiding over-inflation that could cause tissue damage.

[0061] 5. During irrigation or suction operations, the first pressure sensor 113 continuously monitors the pressure inside the patient's body. If the pressure is abnormal (too high or too low), the doctor can adjust the irrigation flow or suction negative pressure in a timely manner to ensure the safety of the operation.

[0062] 6. After dilation or stone removal, the medium inside the balloon 33 is extracted through the pressurization port 41 to cause it to contract; press the button 43 to move the cannula 32 back to the initial position and restore the normal bending performance of the cholangioscope.

[0063] According to another preferred embodiment of this application, the balloon 33 is an eccentric balloon, and a sealing element 48 is provided in the cannula control mechanism 42. The structure and material of the sealing element 48 can be implemented using existing technologies suitable for this application. The sealing element 48 ensures that the cannula control mechanism 42 and the endoscope tube 31 are always in a sealed state. When the cannula 32 is tightly fitted with the human body cavity, it can maintain the internal pressure of the patient's body. The material and structure of the sealing element 48 can be implemented using existing technologies suitable for this application.

[0064] This invention relates to an electronic cholangioscope with a compact structure and simple operation. It can be widely used for the diagnosis and treatment of biliary system diseases, especially suitable for cases requiring dilation and stone removal, such as cystic duct stenosis and common bile duct stones. Its integrated pressure monitoring function significantly improves the safety and controllability of the procedure, and has promising clinical application prospects.

[0065] It should be noted that the above description is only a preferred embodiment of the present utility model. All equivalent alternatives or obvious modifications of the implementation methods given in the specification that can be reasonably predicted by those skilled in the art to achieve the purpose of the present utility model are also included within the protection scope of the present utility model.

[0066] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0067] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An electronic cholangioscope, the electronic cholangioscope having a balloon dilation cannula and a pressure sensor for monitoring pressure, comprising a tip, a bending portion, an insertion portion, an operating portion, and a connecting portion, characterized in that, The head end is provided with a first pressure sensor for monitoring internal pressure. The insertion part includes a scope tube and a sleeve sleeved outside the scope tube. The sleeve can move along the axial direction of the scope tube. The front end of the sleeve is provided with an inflatable balloon. The inner wall of the balloon is provided with a second pressure sensor for monitoring the balloon expansion pressure. The operating unit is provided with a cannula control mechanism for controlling the movement of the cannula and selectively locking it, and a pressurization port for inflating the balloon with an expansion medium. The first pressure sensor and the second pressure sensor are electrically connected and / or signal connected to an external host.

2. The electronic cholangioscope according to claim 1, characterized in that, The axial sliding stroke of the sleeve is sufficient to cover at least the length of the bend, so that the bend can be wrapped within it when the sleeve moves forward.

3. The electronic cholangioscope according to claim 1, characterized in that, The cannula control mechanism includes an unlockable positioning structure for selectively locking the cannula at multiple positions on the endoscope tube.

4. The electronic cholangioscope according to claim 1, characterized in that, The first pressure sensor and the second pressure sensor are respectively connected to the external host through independent signal channels. The external host is equipped with display units that display the intracorporeal pressure and the balloon dilation pressure, respectively.

5. The electronic cholangioscope according to claim 1, characterized in that, The first pressure sensor is integrated inside the head end, and the second pressure sensor is attached to the inner surface of the balloon. The first pressure sensor and the second pressure sensor are connected to a signal line through a wire embedded in the sleeve wall.

6. The electronic cholangioscope according to claim 3, characterized in that, The sleeve control mechanism includes a button, a clip, and a spring. The endoscope tube is provided with a slot. The clip is inserted into the slot under the support of the spring to fix the position of the sleeve. When the button is pressed, the clip disengages from the slot so that the sleeve can move along the endoscope tube.

7. The electronic cholangioscope according to claim 1, characterized in that, The first pressure sensor is a miniature pressure sensor, and the second pressure sensor is a thin-film pressure sensor.

8. The electronic cholangioscope according to claim 1, characterized in that, The balloon is a compliant or semi-compliant balloon, and its maximum diameter after expansion matches the diameter of the target bile duct.

9. The electronic cholangioscope according to claim 1, characterized in that, A sealing structure is provided between the sleeve and the endoscope tube to prevent liquid from entering the gap between them.

10. The electronic cholangioscope according to claim 1, characterized in that, The operating section is also provided with a Luer connector that communicates with the inside of the endoscope tube for connecting a rinsing or suction device.

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