Visual and controllable digestive tract potential monitoring multifunctional catheter

Abstract

The invention relates to the technical field of medical equipment, in particular to a visible and controllable digestive tract potential monitoring multifunctional catheter which comprises a catheter body, an operating handle and an external assembly matched with the operating handle, a plurality of electrodes are distributed on the catheter body at intervals, and the electrodes are attached to the surface of the catheter body to form a ring. A wire matched with the electrode is arranged in the catheter and extends to the electrode from the operating handle. The electrodes are arranged on the catheter body, when the catheter body intervenes in the digestive tract, the electrodes can be driven to the designated position, and potential monitoring is conducted from the interior of the digestive tract; therefore, the potential monitoring intensity can be improved, the potential condition in the digestive tract can be better monitored for a long time, and a more accurate monitoring result can be conveniently obtained.

Description

Technical Field

[0001] The invention relates to the technical field of medical equipment, and in particular to a multifunctional catheter for visually and controllably monitoring gastrointestinal potential. Background Art

[0002] Esophageal and gastrointestinal electricity is an important branch of electrophysiology. As an objective bioelectric indicator of gastrointestinal functional activity, changes in gastrointestinal electrical waveforms and parameters can be used to diagnose gastrointestinal diseases and determine the efficacy of treatment. Multi-organ system disorders in the human body are closely related to functional disorders of the autonomic nervous system and neuroendocrine system. By decoupling continuous monitoring of esophageal electrocardiograms and sympathetic vagus nerve electrical activity along the esophagus and gastrointestinal tract, the state and functional changes of autonomic nervous function and effector organs can be understood.

[0003] The content of electrical activity monitoring includes electrical activity indicators from the esophagus (upper, middle and lower segments) to the stomach, duodenum and jejunum. This monitoring observes the rhythmic state of the digestive tract for a long time (several hours to tens of days), compares it with the movement state of the digestive tract, obtains the correlation between the electrical activity indicators of the digestive tract and the movement indicators, and thus judges the coordination state of the human digestive tract. The electrical signals generated by these sympathetic nerve activities can be directly obtained from the digestive tract with high resolution, which can be used as basic data for monitoring and evaluation of the autonomic nervous state.

[0004] At present, due to the limitation of monitoring equipment, the monitoring of gastrointestinal potential can only be limited to in vitro gastrointestinal potential monitoring in most cases, that is, monitoring the skin gastrointestinal potential graph (EGG) in vitro through an electrogastroenterogram. In clinical practice, the following conditions exist when monitoring gastrointestinal electrical signals through in vitro skin: the gastrointestinal electrical signals are very weak, and the amplitude of the gastrointestinal electrical signals is generally only in the microvolt level (uV); the gastrointestinal electrical signals are very slow, and the frequency of the gastrointestinal electrical signals of normal people is generally only about 0.05Hz (ie 3CPM), and the central frequency of the intestinal electrical signals is about 0.2Hz (ie 12CPM).

[0005] Therefore, it is very difficult to monitor gastrointestinal electrical signals through the skin outside the body. The reason is that, on the one hand, the gastrointestinal electrical signal activity is measured through external electrodes, and the monitored signal is very weak due to the thick body tissue, which can easily lead to misjudgment or omission of gastrointestinal electrical signals due to monitoring accuracy and interference from other physiological electrical signals; on the other hand, due to the slow characteristics of gastrointestinal electrical signals, long-term monitoring is required to understand the gastrointestinal movement.

[0006] From another perspective, if the gastrointestinal mucosal potential is measured directly from the body, its potential signal is at the millivolt level (mV), which is much higher than the microvolt level (uV) of the skin gastrointestinal potential signal. At the same time, the mucosal electrode is closer to the muscularis propria, the origin layer of gastrointestinal electrical activity, thereby reducing the interference of external gastrointestinal signals. Therefore, directly measuring the gastrointestinal mucosal potential from the body is a more valuable monitoring solution.

[0007] At present, in vivo gastrointestinal mucosal potential monitoring is mainly carried out through surgery, such as clamping the gastric mucosa with a monitoring head in the stomach through endoscopic minimally invasive surgery. This solution has the following problems:

[0008] At present, the in vivo gastrointestinal mucosal potential monitoring can be completed through the natural cavity with the assistance of endoscopes. For example, the gastric mucosa is clamped in the stomach with a monitoring head with the assistance of gastroscopy. This solution has the following problems:

[0009] 1. It requires expensive endoscope equipment and the assistance of professional endoscopists to complete the implantation. Patients often need anesthesia. The cost and technical threshold are not low, and the anesthesia risk is also high. It is not suitable for universal use and has a high threshold for use.

[0010] 2. The endoscope cannot be placed in the patient's body for a long time. If the monitoring electrode falls off or shifts in the body, it cannot be adjusted in time and the endoscope operation needs to be performed again, which is time-consuming and laborious.

[0011] 3. The monitoring sites are limited because the wires and monitoring heads are relatively large and the number of implanted monitoring heads is limited;

[0012] 4. The monitoring head clamps the gastric mucosa, which can cause gastric mucosal damage, so it cannot be left in place for a long time.

[0013] It is also possible to directly open the digestive tract through surgery. For example, some patent application documents disclose solutions for measuring gastrointestinal mucosal potential from within the body. However, there are some defects, such as:

[0014] Patent application with publication number CN114072052A discloses a "device for measuring digestive tract congestion", which measures gastrointestinal bioimpedance by implanting a wireless measuring device to determine whether the digestive tract has inflammation and edema (bioimpedance decreases when edema occurs). This solution has the following problems:

[0015] 1. This patent is a device for measuring bioimpedance, which needs to emit current itself and calculate the resistance through the tissue. It is not a device for measuring the bioelectric potential itself.

[0016] 2. It needs to be implanted into the patient's gastrointestinal mucosa through surgery, which is a traumatic measurement and causes harm to the patient's body.

[0017] 3. The position of the bias electrode is difficult to fix. There are cases where the bias electrode cannot be fixed due to inaccurate positioning, or surgical implantation is required for placement and fixation, which increases the incision.

[0018] Patent application with publication number AU2010284772A1 discloses "System and method for mapping gastrointestinal electrical activity", which monitors gastrointestinal electrical signals with high precision by arranging electrode arrays in the gastrointestinal tract, and displays gastrointestinal electrical potentials in the form of graphics and animations in a variety of display forms through subsequent data processing, mainly used for diagnosis and guidance of treatment of gastric rhythm disorders and gastric motility disorders. This solution has the following problems:

[0019] 1. Short retention time affects the accuracy of monitoring results. This scheme requires the electrodes to be stretched out for monitoring, occupying the gastrointestinal space, and using convex electrodes to press into the mucosa. Although this is conducive to signal enhancement, it is not conducive to long-term retention (the scheme states that the monitoring time is 5 to 15 minutes), so it is impossible to monitor changes in gastrointestinal potential over a long period of time.

[0020] 2. Inconvenient to use, and other methods are required for placement and use. For example, surgery is required to place the electrode at the predetermined position in the human body for potential monitoring, and the implanted electrode can only be positioned during the surgery, which is not suitable for visual and controllable positioning, monitoring displacement, secondary positioning, etc. during long-term retention.

[0021] 3. Single function. The catheter only serves as an object for the electrode to attach to. It plays the role of fixing, transporting, and stretching the electrode. It cannot realize functions such as gastrointestinal nutrition and drug delivery, exhaust, and providing diagnosis and treatment channels.

[0022] It can be seen that there is still room for improvement in the existing technology, and adjustments and optimization should be made to increase the ease of use of gastrointestinal potential monitoring. It should be able to be placed freely and quickly in the gastrointestinal tract to be monitored while avoiding trauma, and at the same time be able to achieve long-term indwelling for monitoring and observation, and be able to perform endoscopic operations on the monitored area, and simultaneously realize auxiliary operations such as nutrition supply and drug supply.

[0023] Therefore, a more reasonable technical solution should be proposed to solve the technical problems existing in the prior art. Summary of the invention

[0024] In order to overcome at least one of the defects mentioned above, the present invention proposes a visually controllable multifunctional catheter with potential monitoring, which is used to improve the convenience of operation during insertion, perform long-term potential monitoring in the catheter, and can achieve stable monitoring of the catheter potential signal and determine its changing pattern.

[0025] In order to achieve the above-mentioned purpose, the multifunctional catheter disclosed in the present invention can adopt the following technical solutions:

[0026] A multifunctional catheter for visually and controllably monitoring gastrointestinal potential comprises a catheter body and an operating handle, and an external component that cooperates with the operating handle. A plurality of electrodes are spaced apart on the catheter body and the electrodes are attached to the surface of the catheter body to form a ring. A wire that cooperates with the electrode is arranged in the catheter, and the wire extends from the operating handle to the electrode.

[0027] The multifunctional catheter disclosed above is used to intervene through the human mouth and nose or the fistula of the body, so as to monitor the potentials of multiple locations in the human digestive tract in real time, and can be kept in place painlessly for a long time, thereby achieving higher-precision monitoring and providing judgment data on the current situation of the human digestive tract.

[0028] Furthermore, the electrode is constructed to be arranged around the catheter body, and the structure of the electrode corresponds to the catheter body. The specific details are not limited to a single one. Here, an optimization is made and one of the feasible options is proposed: the electrode as a whole is a circular ring structure, and a conductive surface or a plurality of conductive areas are formed on the outer surface of the circular ring structure. The conductive surface and the conductive area are smoothly transitioned with the outer wall surface of the catheter. When such a scheme is adopted, when the catheter body is inserted into the human body, extends along the human digestive tract and is retained in the digestive tract, the electrode can fully fit with the inner wall of the human digestive tract, and then the potential data can be monitored. Since the electrode only obtains the potential signal by fitting, it will not cause invasive damage to the human body, and therefore will not cause pain to the patient, nor will it harm the human body.

[0029] Furthermore, in order to make the electrode better fit the inner wall of the digestive tract and improve the accuracy of potential monitoring, an optimization is made here and one of the feasible options is proposed: the conductive surface or conductive area of ​​the electrode protrudes from the peripheral surface of the catheter. When such a solution is adopted, the electrode can better fit the inner wall of the digestive tract, and use the elasticity of the inner wall of the digestive tract to maintain a stable and reliable fit. When the electrode forms a ring-shaped conductive surface, the entire conductive ring surface can protrude from the peripheral surface of the catheter; when the electrode forms multiple conductive areas on the ring, the surface of the conductive area protrudes from the peripheral surface of the catheter, which can minimize the expansion force inside the digestive tract.

[0030] Furthermore, the catheter body matched with the electrode is used to deliver the electrode to a set position in the human digestive tract. In order to keep the electrode in contact with the inner wall of the digestive tract while reducing the scratch and friction damage to the digestive tract, the integrity of the catheter and electrode structure can be improved. An optimization is performed here and one of the feasible options is proposed: the surface of the catheter forms an annular protrusion to smoothly match the conductive surface of the electrode, or the surface of the catheter forms a plurality of bulge-shaped protrusions to smoothly match the conductive area of ​​the electrode.

[0031] Furthermore, when the electrode forms an annular conductive surface, the electrode is in a circular ring shape; when the electrode forms multiple conductive areas, the composition structure of the electrode can be constructed in a variety of forms, which are not limited to a single one. Here, an optimization is made and one of the feasible options is proposed: the electrode includes a plurality of conductive blocks arranged in an array, and the conductive blocks are conductively connected, and the surface of each conductive block is a conductive area. When such a scheme is adopted, multiple conductive areas are connected, and any conductive block that is in contact with the inner wall of the digestive tract can realize the monitoring of the potential, that is, the monitoring function of the block electrode is realized.

[0032] Furthermore, in some other solutions, the electrode can be constructed into more structures to realize the structural design of multiple conductive areas. Here, optimization is performed and one feasible option is proposed: the electrode includes a plurality of cross-arranged conductive strips, a hollow structure is formed between the conductive strips, and the surface of the conductive strips forms a conductive area. When such a solution is adopted, multiple conductive strips can be formed in one piece.

[0033] Furthermore, in order to achieve the electrode protruding from the catheter body, other solutions can be adopted. Here, we optimize and propose one of the feasible options: a micro-balloon is formed on the catheter body to support and lift the electrode outward, and an air path component that matches the micro-balloon is set in the operating handle. When such a solution is adopted, the balloon can be propped up by the air path component, but this micro-balloon is different from the conventional balloon that needs to be fully expanded to fit the entire inner wall of the digestive tract. The micro-balloon only needs to be expanded to an outer diameter that is slightly larger than the tube diameter, such as 1 to 2 mm. This can increase the probability of contact between the electrode and the digestive tract without affecting the flexibility of the entire pipeline, and will not produce pressure on the inner wall of the digestive tract like a conventional balloon, resulting in the problem of local damage to the inner wall of the digestive tract after long-term retention.

[0034] Furthermore, the catheter body can adapt to the direction of the human digestive tract and bend accordingly according to the human digestive tract, so as to better fit the digestive tract, ensure better monitoring accuracy, and reduce the discomfort of the human body; the bending control of the catheter body can be achieved through a variety of schemes, which are not limited to the only one. Here, an optimization is made and one of the feasible options is proposed: a coil for controlling the bending direction is built into the catheter body, and the direction of the coil is adjusted by the control mechanism; the tube hole of the catheter body is a working cavity, and a first cavity for arranging an imaging component is formed in the tube wall of the catheter body, and a second cavity for conveying gas and liquid is also formed, as well as a gastric orifice cavity connected to the stomach cavity for material delivery; the operating handle is connected to the rear end of the catheter body, and includes a cavity opening structure that is connected and cooperated with the working cavity, the first cavity, the second cavity and the gastric orifice cavity, and is used to control the movement of the catheter body, and the external component is used to assist in holding, power supply, processing and transmitting signals, and connecting a display device for real-time monitoring and transmitting information to a data center. When such a solution is adopted, ventilation, fluid flow, lighting, imaging monitoring and other operations can be performed through the catheter body, and the operating handle can be used for holding control, and more real-time data and energy can be transmitted through external components. The catheter body is built with a snake tube, which can accurately control the bending direction and extension direction, thereby improving the accuracy of control, improving the convenience of use, and avoiding some unnecessary harm to the human body.

[0035] Furthermore, the control mechanism is used to control the bending direction of the coiled tube, thereby improving the accuracy of control. The control mechanism can adopt a variety of feasible solutions, which are not limited to the only one. Here, optimization is made and one feasible option is proposed: the control mechanism includes a plurality of traction wires, the front end of which is connected to the front end of the coiled tube and is spaced apart on the circumference to pull the coiled tube to bend in the corresponding direction, and the rear end of the traction wire extends to the operating handle and is controlled by the operating handle. When such a solution is adopted, by pulling the corresponding traction wire, the coiled tube can be guided to bend in the corresponding direction, so that the bending direction of the catheter body can be more accurately controlled.

[0036] Furthermore, the operating handle is formed at the rear end of the catheter body, and a split structure can be adopted. Here, optimization is made and one of the feasible options is proposed: the operating handle is docked and connected with the catheter body, the first cavity is connected to the operating handle and the internal imaging component communicates with the control circuit, the second cavity is connected to the operating handle and cooperates with the injection interface, the gastric orifice cavity is connected to the operating handle and cooperates with the gastric orifice interface, and the working cavity is connected to the operating handle and cooperates with the working interface. When such a solution is adopted, multiple operations can be controlled more conveniently from the operating handle.

[0037] The external components include several external handles and several data cables. The external handles and data cables are directly matched to the operating handles, and / or the data cables are matched to the external handles and then matched to the operating handles. The lighting components and cameras connected to the operating handles can be connected to the display devices in a wireless or wired manner through the external handles to achieve functions such as opening and closing control, real-time monitoring, and information transmission to the data center. When such a solution is adopted, batteries can be set in some external handles to power the entire catheter and integrate components such as the control motherboard; another special external handle can be set to assist in holding operation.

[0038] Compared with the prior art, some beneficial effects of the technical solution disclosed in the present invention include:

[0039] By setting electrodes on the catheter body, when the catheter body intervenes in the digestive tract, the electrodes can be driven to a specified position to monitor the potential from inside the digestive tract; this can improve the intensity of potential monitoring, better monitor the potential conditions inside the digestive tract over a long period of time, and facilitate obtaining more accurate monitoring results. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only represent some embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 It is a front view schematic diagram of the catheter body and the operating handle.

[0042] Figure 2 It is a top view schematic diagram of the catheter body and the operating handle.

[0043] Figure 3 It is a side view schematic diagram of the catheter body and the operating handle.

[0044] Figure 4 This is a schematic diagram of the internal components of the operating handle when viewed from above.

[0045] Figure 5 It is a schematic diagram of the internal structure of the operating handle when viewed from the front.

[0046] Figure 6 It is a schematic diagram of the cross-sectional structure of the front end of the catheter body when viewed from the side.

[0047] Figure 7 It is a schematic diagram of the cross-sectional structure when looking down at the front end of the catheter body.

[0048] Figure 8 for Figure 6Schematic diagram of the cross-sectional structure of AA.

[0049] Fig. 9 Schematic diagram of catheter insertion into the digestive tract.

[0050] Fig.10 Schematic diagram of the arrangement of electrodes and wires on the catheter body.

[0051] Fig.11 Schematic diagram of the raised structure of the electrode on the catheter body.

[0052] Fig.12 for Fig.11 The first schematic diagram of the BB section.

[0053] Fig.13 for Fig.11 The second schematic diagram of the BB section.

[0054] Fig.14 for Fig.11 A third schematic diagram of the BB section.

[0055] Fig.15 There are 7 selectable structures for the conductive surface or conductive area on the electrode.

[0056] Fig.16 Schematic diagram of catheter insertion into the human digestive tract.

[0057] In the above drawings, the meanings of the various marks are as follows:

[0058] 1. Catheter body; 101. Protrusion; 110. Electrode; 111. Wire; 2. Operating handle; 11. Camera; 12. Light set; 13. Working cavity; 14. Coil; 15. Traction wire; 17. Second cavity; 18. Gastric orifice cavity; 19. Identification; 21. Operating part; 22. Working interface; 23. Injection interface; 24. Gastric orifice interface; 26. Fixing interface; 27. Rotating wheel; 28. Data interface. DETAILED DESCRIPTION

[0059] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0060] In view of the problems existing in the prior art, the following embodiments are optimized and overcome the defects existing in the prior art. In order to improve the convenience of using a catheter to monitor potential in the digestive tract, it can be placed freely and quickly in the monitored gastrointestinal part while avoiding trauma, and can be left in place for a long time for monitoring and observation, and can perform endoscopic operations on the monitored part, and can simultaneously perform auxiliary operations such as nutrition supply and drug supply, the following embodiments provide a multifunctional catheter for visual and controllable gastrointestinal potential monitoring, which can overcome the problems existing in the existing gastrointestinal potential monitoring technology, such as the monitoring electrode is not easy to be quickly and accurately placed in the human digestive tract, and cannot maintain an accurate monitoring position for a long time without trauma after placement, the monitoring electrode cannot be in good contact with the gastrointestinal mucosa, and cannot be monitored in real time and concurrent auxiliary treatment.

[0061] Example

[0062] like Figures 1 to 16 As shown, this embodiment provides a multifunctional catheter for visually controllable gastrointestinal potential monitoring, including a catheter body 1 and an operating handle 2, and an external component that cooperates with the operating handle 2. A plurality of electrodes 110 are spaced apart on the catheter body 1 and the electrodes 110 are attached to the surface of the catheter body 1 to form a ring shape. A wire 111 that cooperates with the electrode 110 is arranged in the catheter, and the wire 111 extends from the operating handle 2 to the electrode 110.

[0063] The multifunctional catheter disclosed in this embodiment is used to intervene through the human mouth and nose or the fistula of the body, so as to monitor the potentials of multiple locations in the human digestive tract in real time, and can be kept in place painlessly for a long time, thereby achieving higher-precision monitoring and providing judgment data on the current situation of the human digestive tract.

[0064] Preferably, the catheter body 1 and the operating handle 2 are designed and manufactured in an integrated manner, and compared with the reusable assembled guide device, no assembly or disassembly is required, and the operation is easy. At the same time, the catheter body 1 and the operating handle 2 are disposable instruments, and compared with the reusable assembled guide device, no cleaning or disinfection is required, and the catheter body 1 and the operating handle 2 are clean and hygienic.

[0065] Preferably, the material of the electrode 110 can be selected from materials such as Pt, Ti, Cu or medical stainless steel, which can resist acid and alkali corrosion in the digestive tract and have biocompatibility, ensuring that the electrode 110 will not corrode during the catheter indwelling period and will not cause harm to the human body. The surface of the electrode 110 can also be plated to form a gold-plated layer or other corrosion-resistant layer to enhance the protection of the electrode 110 and the human body.

[0066] Preferably, the tube diameter size of the catheter body 1 is varied, the outer diameter of the intestinal end is Φ1.5 to Φ8 mm, and the outer diameter of the esophagus and stomach ends is 0 to 5 mm larger than the outer diameter of the intestinal end, so that it is easy to be inserted into the patient's body and has an appropriate working channel; the length of the catheter body 11 also has different specifications, ranging from 40 cm to 250 cm, to adapt to the physiological characteristics of different patients, such as infants, children, adults, etc.

[0067] The electrode 110 is constructed to be arranged around the catheter body 1. The structure of the electrode 110 corresponds to the catheter body 1. The specific details are not limited to the only one. This embodiment is optimized and adopts one of the feasible options: the electrode 110 is a circular ring structure as a whole, and a conductive surface or a plurality of conductive areas are formed on the outer surface of the circular ring structure. The conductive surface and the conductive area are smoothly transitioned with the outer wall of the catheter. When such a scheme is adopted, when the catheter body 1 is inserted into the human body, extends along the human digestive tract and is retained in the digestive tract, the electrode 110 can fully fit with the inner wall of the human digestive tract, and then monitor the potential data. Since the electrode 110 only obtains the potential signal by fitting, it will not cause invasive damage to the human body, so it will not cause pain to the patient and will not harm the human body.

[0068] In order to make the electrode 110 better fit the inner wall of the digestive tract and improve the accuracy of potential monitoring, this embodiment is optimized and adopts one of the feasible options: the conductive surface or conductive area of ​​the electrode 110 protrudes from the peripheral surface of the catheter. When such a solution is adopted, the electrode 110 can better fit the inner wall of the digestive tract, and use the elasticity of the inner wall of the digestive tract to maintain a stable and reliable fit. When the electrode 110 forms a ring-shaped conductive surface, the entire conductive ring surface can protrude from the peripheral surface of the catheter; when the electrode 110 forms multiple conductive areas on the ring, the surface of the conductive area protrudes from the peripheral surface of the catheter, which can minimize the expansion force inside the digestive tract.

[0069] The catheter body 1 matched with the electrode 110 is used to deliver the electrode 110 to a set position in the human digestive tract. In order to keep the electrode 110 in contact with the inner wall of the digestive tract while reducing the scratching and friction damage to the digestive tract, the integrity of the catheter and the electrode 110 structure can be improved. This embodiment is optimized and adopts one of the feasible options: the surface of the catheter forms an annular protrusion 101 to smoothly match the conductive surface of the electrode 110, or the surface of the catheter forms a plurality of bulge-shaped protrusions 101 to smoothly match the conductive area of ​​the electrode 110.

[0070] When the electrode 110 forms an annular conductive surface, the electrode 110 is in a circular ring shape; when the electrode 110 forms multiple conductive areas, the composition structure of the electrode 110 can be constructed in a variety of forms, which are not limited to a single one. This embodiment optimizes and adopts one of the feasible options: the electrode 110 includes a plurality of conductive blocks arranged in an array, and the conductive blocks are conductively connected, and the surface of each conductive block is a conductive area. When such a scheme is adopted, multiple conductive areas are connected, and any conductive block that is in contact with the inner wall of the digestive tract can realize the monitoring of the potential, that is, the monitoring function of the block electrode 110 is realized.

[0071] In some other solutions, the electrode 110 can be constructed into more structures to realize the structural design of multiple conductive areas. This embodiment optimizes and adopts one of the feasible options: the electrode 110 includes a plurality of cross-arranged conductive strips, a hollow structure is formed between the conductive strips, and the surface of the conductive strips forms a conductive area. When such a solution is adopted, multiple conductive strips can be integrally formed.

[0072] In order to achieve that the electrode 110 protrudes from the catheter body 1, other solutions can also be adopted. This embodiment is optimized and adopts one of the feasible options: a micro-balloon for supporting and lifting the electrode 110 outward is formed on the catheter body 1, and an air path component matching the micro-balloon is arranged in the operating handle 2. When such a solution is adopted, the balloon can be propped up by the air path component, but this micro-balloon is different from the conventional balloon that needs to be fully expanded to fit the entire inner wall of the digestive tract. The micro-balloon only needs to be expanded to an outer diameter that is slightly larger than the tube diameter, such as 1 to 2 mm. This can increase the probability of the electrode 110 contacting the digestive tract without affecting the flexibility of the entire pipeline, and will not produce pressure on the inner wall of the digestive tract like a conventional balloon, resulting in the problem of local damage to the inner wall of the digestive tract after long-term retention.

[0073] The catheter body 1 can adapt to the direction of the human digestive tract and bend accordingly according to the human digestive tract, so as to better fit the digestive tract, ensure better monitoring accuracy, and reduce the discomfort of the human body; the bending control of the catheter body 1 can be achieved through a variety of schemes, which are not limited to the only one. This embodiment is optimized and adopts one of the feasible options: a coil 14 for controlling the bending direction is built into the catheter body 1, and the direction of the coil 14 is adjusted by the control mechanism; the tube hole of the catheter body 1 is a working cavity 13, and a first cavity for arranging an imaging component is formed in the tube wall of the catheter body 1. A second cavity 17 for conveying gas and liquid is also formed, and a gastric orifice cavity 18 connected to the stomach cavity for material delivery is formed; the operating handle 2 is connected to the rear end of the catheter body 1, and includes a cavity opening structure connected and matched with the working cavity 13, the first cavity, the second cavity 17 and the gastric orifice cavity 18, and is used to control the movement of the catheter body 1, and the external component is used to assist in holding, power supply, processing and transmitting signals, and connecting a display device for real-time monitoring and transmitting information to a data center. When such a solution is adopted, corresponding ventilation, fluid flow, lighting, imaging monitoring and other operations can be performed through the catheter body 1, and the operating handle 2 can be held for control, and more real-time data and energy can be transmitted through external components. The catheter body 1 is built with a coil 14, which can accurately control the bending direction and extension direction, thereby improving the accuracy of control, improving the convenience of use, and avoiding some unnecessary harm to the human body.

[0074] The control mechanism is used to control the bending direction of the coiled tube 14, thereby improving the control accuracy. The control mechanism can adopt a variety of feasible solutions, which are not limited to the only one. This embodiment is optimized and adopts one of the feasible options: the control mechanism includes a plurality of traction wires 15, the front end of the traction wires 15 is connected to the front end of the coiled tube 14 and is spaced apart on the circumference to pull the coiled tube 14 to bend in the corresponding direction, and the rear end of the traction wires 15 extends to the operating handle 2 and is controlled by the operating handle 2. When such a solution is adopted, by pulling the corresponding traction wires 15, the coiled tube 14 can be guided to bend in the corresponding direction, so that the bending direction of the catheter body 1 can be more accurately controlled.

[0075] The operating handle 2 is formed at the rear end of the catheter body 1 and can adopt a split structure. This embodiment is optimized and adopts one of the feasible options: the operating handle 2 is docked and connected with the catheter body 1, the first cavity is connected to the operating handle 2 and the internal imaging component communicates with the control circuit, the second cavity 17 is connected to the operating handle 2 and cooperates with the injection port 23, the gastric orifice cavity 18 is connected to the operating handle 2 and cooperates with the gastric orifice port 24, and the working cavity 13 is connected to the operating handle 2 and cooperates with the working port 22. When such a solution is adopted, multiple operations can be more conveniently controlled from the operating handle 2.

[0076] The external components include several external handles and several data cables. The external handles and the data cables are directly matched to the operating handle 2, and / or the data cables are matched to the external handles and then matched to the operating handle 2. The lighting components and the camera 11 connected to the operating handle 2 can be connected to the display device in a wireless or wired manner through the external handles to achieve functions such as opening and closing control, real-time monitoring, and information transmission to the data center. When such a solution is adopted, batteries can be set in some external handles to power the entire catheter and integrate components such as the control motherboard; another special external handle can be set to assist in holding operation.

[0077] The catheter provided in this embodiment performs corresponding ventilation, fluid flow, lighting, imaging monitoring and other operations through the catheter body 1, is controlled by holding at the operating handle 2, and transmits more real-time data and energy through external components. The coil 14 built into the catheter body 1 can accurately control the bending direction and extension direction, thereby improving the accuracy of control, improving the convenience of use, and avoiding some unnecessary harm to the human body.

[0078] Preferably, the outer wall material of the catheter body 1 can be made of medical-grade polyurethane, polyether-type polyurethane and other materials with excellent biocompatibility and patient compliance to ensure safe insertion, which can achieve the following effects: a) biocompatibility, which will not dissolve, corrode, or release toxic and harmful substances in the body fluid environment of various body cavities; b) patient compliance, which is flexible during operation and retention and will not cause friction to the body cavity mucosa to form ulcers and other inflammatory reactions (peristalsis of the digestive tract and shear force generated by the physiological curvature of the digestive tract).

[0079] Preferably, the working hole of the catheter body 1 is connected to the working hole interface, and the size of the working hole is Φ0.5~Φ5mm, which can realize multiple functions such as water injection, suction, infusion of nutrient solution, drug administration, and guiding diagnostic equipment. It can adapt to different enteral nutrition plans and provide a diagnostic channel. Diagnostic tools can reach the predetermined body cavity position through the diagnostic channel to complete diagnostic work.

[0080] Preferably, the water injection hole size of the catheter body 1 is Φ0.1~Φ1mm, and the air injection and water injection holes are two holes on the end face, but they are combined into one channel in the tube, which can be used to inject air into the cavity to bulge the gastrointestinal cavity, inject water to clean the cavity wall, and clean the camera 11 at the same time.

[0081] In this embodiment, the control mechanism is used to control the bending direction of the coiled tube 14, thereby improving the accuracy of control. The control mechanism can adopt a variety of feasible solutions, which are not limited to the only one. This embodiment is optimized and adopts one of the feasible options: the control mechanism includes a plurality of traction wires 15, the front end of the traction wires 15 is connected to the front end of the coiled tube 14 and is spaced on the circumference to pull the coiled tube 14 to bend in the corresponding direction, and the rear end of the traction wires 15 extends to the operating handle 2 and is controlled by the operating handle 2. When such a solution is adopted, by pulling the corresponding traction wires 15, the coiled tube 14 can be guided to bend in the corresponding direction, so that the bending direction of the catheter body 1 can be more accurately controlled.

[0082] Preferably, the snake bone of the catheter body 1 is controlled by the traction wire 15, the control wheel 27, and the push rod to form a direction guidance system, which can realize flexible and timely controllable direction guidance in one dimension, two directions, and 0-180° in each direction. Compared with the gravity guide head or the magnetic control guide head, it has the advantages of more direct, simple, fast, accurate, large control range, and real-time control. In conjunction with the above-mentioned visualization system, the direction guidance system can realize two functions: a) It can be placed in the specified position easily and quickly during the insertion process; b) Secondary quick positioning function. The catheter inserted into the human digestive system is easily pulled from the oral side to cause the catheter to shift. At this time, the operating doctor needs to perform secondary positioning of the catheter. The operator only needs to simply connect the control device to immediately complete the secondary positioning of the catheter again.

[0083] Preferably, the operating handle 2 has a circuit board inside, which is connected to the camera 11, the lighting lamp group 12 and the electrode 110 in the catheter body 1 through a wire 111, and is used to receive video signals, control the opening and closing of the lighting lamp group 12, and receive the potential signal of the electrode 110. At the same time, the circuit board has a battery, a video signal processing module and a wireless transmission / reception module, which are used to connect to an external display and operating device (such as a computer, a tablet computer, a mobile phone, etc. with dedicated software installed).

[0084] Preferably, the operating handle 2 has a data interface 28 (USB / Type-C, etc.) connected to the circuit board on the outside, which is used for signal connection and charging / power supply with external devices through an external data cable or an external handle. At the same time, the external handle is also convenient for holding during operation.

[0085] Preferably, the operating handle 2 has a fixing interface 26 on the outside for extracorporeal retention and fixation / outer diameter handle fixation. On the one hand, it serves as a fixing device for the external handle when operated by a doctor, and on the other hand, it is convenient to hang and fix on a bedside, equipment bracket, infusion rack, etc. outside the patient's body when retained, so as to meet the needs of easy retention and fixation outside the patient's body and improve patient compliance.

[0086] The imaging assembly in this embodiment is used to detect the inside of the digestive tract to obtain image data, and it can be constructed in a variety of schemes, which are not limited to the only one. This embodiment is optimized and adopts one of the feasible options: the imaging assembly includes a harness extending along the first cavity, and also includes an illuminator and a camera 11, and the illuminator and the camera 11 are located at the front of the catheter body 1. When such a scheme is adopted, the illuminator can be arranged around the camera 11 to provide a more uniform lighting effect, thereby obtaining a better imaging effect.

[0087] Preferably, the lighting lamp group 12 on the end surface of the catheter body 1 can be LED lamp beads, or waterproof lighting methods such as light guides.

[0088] In this embodiment, the same cavity is used to transport gas and liquid. In order to guide and balance the delivery pressure during the delivery process, the structure of the second cavity 17 is optimized and the following feasible option is adopted: the second cavity 17 forms two outlets when extending to the front end of the catheter body 11, and the two outlets are symmetrically arranged on both sides of the first cavity. When such a solution is adopted, the two outlets can transport gas and liquid to the gastrointestinal tract, bulge the gastrointestinal cavity, and clean and flush the front of the imaging component, so as to obtain clear image data.

[0089] The gastric orifice cavity 18 is used to connect the gastric cavity for ventilation and also to deliver substances required for treatment. Its arrangement is not limited to a single one. This embodiment optimizes and adopts one of the feasible options: the gastric orifice cavity 18 extends along the catheter body 1 and forms an opening at the gastric cavity in the middle of the catheter body 1. When such a solution is adopted, substances required for treatment can be delivered directly to the stomach through the catheter body 1.

[0090] Preferably, the size of the stomach hole of the catheter body 1 is Φ0.1-Φ2 mm, which is located in the stomach section of the catheter body 1 and can realize multiple functions such as gastric exhaust and intragastric drug administration.

[0091] When controlling the coiled tube 14, multi-directional bending can be achieved through simple operations. Specifically, multiple solutions can be adopted, which are not limited to the only one. This embodiment optimizes and adopts one of the feasible options: the operating handle 2 is provided with a rotating wheel 27, the number of the traction wires 15 is two and they are arranged at a circumferential angle of 180°, and the two traction wires 15 are both wound around the rotating wheel 27 and controlled by the rotating wheel 27 to achieve relative tensioning action. When such a solution is adopted, the coiled tube 14 can be reciprocatedly bent on a plane by reciprocatingly rotating the rotating wheel 27.

[0092] In order to improve the convenience of operation, this embodiment is optimized and adopts one of the feasible options: the operating handle 2 is also provided with an operating member 21 for driving the rotating wheel 27 to rotate. When such a solution is adopted, the operating member 21 can be constructed as an operating disk, an operating handle, and the like.

[0093] The operating handle 2 is formed at the rear end of the catheter body 1 and can adopt a split structure. This embodiment is optimized and adopts one of the feasible options: the operating handle 2 is docked and connected with the catheter body 1, the first cavity is connected to the operating handle 2 and the internal imaging component communicates with the control circuit, the second cavity 17 is connected to the operating handle 2 and cooperates with the injection port 23, the gastric orifice cavity 18 is connected to the operating handle 2 and cooperates with the gastric orifice port 24, and the working cavity 13 is connected to the operating handle 2 and cooperates with the working port 22. When such a solution is adopted, multiple operations can be more conveniently controlled from the operating handle 2.

[0094] In order to conveniently check the intervention length of the catheter body 1, this embodiment is optimized and adopts one of the feasible options: a length mark 19 is provided on the catheter body 1 to mark the intervention length. When such a solution is adopted, the length mark 19 includes a scale.

[0095] The external assembly can use a variety of components to achieve more functional requirements, and is not specifically limited. This embodiment is optimized and adopts one of the feasible options: the external assembly includes a plurality of external handles and a plurality of data cables, and the external handles and the data cables are directly matched to the operating handle 2, and / or the data cables are matched to the external handles and then the external handles are matched to the operating handle 2. When such a solution is adopted, batteries can be set in some external handles to power the entire catheter, and the control motherboard and other components are integrated at the same time; another special external handle can be set to assist in holding operation.

[0096] Preferably, in this embodiment, a fixed interface 26 and a data interface 28 are provided on the operating handle 2 for connecting an external handle and a data cable.

[0097] Preferably, the outer surface and inner cavity of the catheter body 1 are evenly coated with lubricant to ensure smooth catheter placement and prevent nutrient solution from sticking and clogging.

[0098] Preferably, the outer surface of the catheter body 1 has a length mark 19 to facilitate the operator to judge the insertion length of the pipeline.

[0099] Preferably, the camera 11 on the end face of the catheter body 1 adopts a self-sealed high-pixel (50,000 to 10 million pixels) CMOS / CCD sensor with an outer envelope size of Φ0.5 to Φ4 mm.

[0100] The visualization system composed of the camera 11 and the lighting lamp group 12 on the end face of the catheter body 1 has two functions, namely a) providing intuitive visual guidance during the insertion process to reduce the difficulty of insertion; and b) dynamically and continuously monitoring the state of the body cavity during the indwelling period to facilitate observation of whether the catheter is displaced during the indwelling process and changes in the gastrointestinal physiological state.

[0101] When implemented according to the above scheme, the following effects can be achieved:

[0102] 1) The visual and controllable function allows this patented catheter to be quickly and accurately placed in the predetermined position through the natural cavity of the human body without the need for other tools or invasive surgery.

[0103] 2) Once it reaches the position, it can be left in the body for a long time for continuous testing without fear of displacement or causing harm to the human body.

[0104] 3) The electrode 110 is firm and stable, and can detect the required potential data more sensitively and accurately.

[0105] 4) The integrated structural design requires no storage and maintenance, nor does it require complicated assembly and operation procedures, which greatly facilitates the use of clinical operators.

[0106] 5) It also has the functions of enteral nutrition, drug administration, and access to diagnostic and treatment equipment, making it convenient to carry out targeted diagnosis and treatment of patients at the same time while obtaining gastrointestinal potential data.

[0107] 6) The digestive tract can be stimulated by applying appropriate voltage and current to two or more specific electrodes 110 in the digestive tract, thereby achieving the effect of regulating the digestive tract function.

[0108] When the scheme disclosed in the above embodiment is used, some actual cases are listed for illustration.

[0109] Case 1

[0110] A multifunctional catheter for visual and controllable gastrointestinal potential monitoring, wherein the outer diameter of the intestinal end of the catheter body 1 is Φ4mm, the overall length is 140cm, and the outer diameter of the esophagus and stomach ends is Φ5mm, and the catheter is suitable for adult males with a height of 170cm.

[0111] Eleven electrodes 110 are arranged on the outer surface of the catheter body 1 along the length direction. The electrodes are ring-shaped and correspond to the positions of the digestive tract in the body, including the upper esophagus, middle esophagus, lower esophagus, cardia, gastric fundus, gastric antrum, pylorus, descending duodenum, horizontal duodenum, ascending duodenum, and jejunum.

[0112] The electrode 110 has a width of 5 mm, and the electrode pattern is as shown in the figure below, surrounding the outer wall of the catheter. The catheter wall at the electrode protrudes 0.5 mm, that is, the outer diameter is Φ6 mm in the esophagus and stomach, and the outer diameter is Φ5 mm in the intestine. The electrode is made of Pt material and has a thickness of 0.1.

[0113] The camera 11 on the end face of the catheter body 1 adopts a self-sealed 160,000-pixel CMOS sensor with an outer envelope size of Φ1 mm.

[0114] The lighting lamp group 12 on the end surface of the catheter body 1 adopts a light guide lighting method that surrounds the camera 11.

[0115] The working hole 13 of the catheter body 1 is connected to the working hole interface 22, and the size of the working hole is Φ2 mm.

[0116] The gas injection and water injection holes 17 of the catheter body 1 are connected to the gas injection and water injection hole interface 23. The size of the gas injection / water injection hole is Φ0.3mm. The gas injection / water injection hole is two holes on the end surface, but the two holes are combined into one channel in the tube.

[0117] The stomach hole 18 of the catheter body 1 is connected to the stomach hole interface 24, the size of the stomach hole is Φ0.5 mm, and it is located in the stomach section of the catheter.

[0118] The outer wall material 16 of the catheter body 1 is made of medical grade polyurethane, and the outer surface and the inner cavity are evenly covered with a water-based lubricating layer.

[0119] The outer surface of the catheter body 1 has length markings. Starting from the end, each scale point is 1 cm, and the size is marked every 10 cm.

[0120] The snake bone 14 of the catheter body 1 is controlled by the traction wire 15, the control wheel 27, and the push rod 21 to form a direction guidance system, which can realize flexible and timely controllable direction guidance in one dimension, two directions, and each 0 to 180 degrees.

[0121] The operating handle 2 has an outer envelope size of Φ30mm×40mm and a weight of 50g.

[0122] The operating handle 2 has a circuit board 25 inside, which is connected to the camera 11 and the lighting lamp group 12 in the catheter body 1 through wires. The operating handle has a micro switch for photo and video control. The operating handle 2 has a Type-C data interface 28 connected to the circuit board 25 outside, which is used to connect signals and charge / power with external devices through an external data line 29 or an external handle 210.

[0123] The outside of the operating handle 2 is provided with a fixing interface 26 for extracorporeal retention and fixation / outer diameter handle fixation.

[0124] Directions:

[0125] 1. Soak the catheter body 1 with saline;

[0126] 2. The external handle 210 is connected to the operating handle 2 via the data interface 28 and the fixed interface 26;

[0127] 3. Connect the external video display device to the external handle 210 via wifi to detect the video effect and lighting effect;

[0128] 4. Connect the working hole interface 22 to the suction device; connect the gas / water injection hole interface 23 to the gas injection device; connect the stomach hole interface 24 to the exhaust device;

[0129] 5. Raise the patient's head of bed 30 degrees and place him / her in right lateral position;

[0130] 6. Insert the catheter from the patient's nostril / oral cavity, through the pharynx, through the esophagus and into the stomach. During this process, flush the pharynx and stomach through the water injection hole 17 as needed to prevent the camera from being blocked by foreign objects in the body. Suction the excess intracavitary liquid through the working hole 13, control the catheter to push and rotate through the external handle, and control the push rod 21 to drive the control wheel 27 and the traction wire 15 to control the snake bone 14 to move forward and adjust the direction and angle;

[0131] 7. After entering the stomach, the external handle is rotated and the snake bone 14 is controlled to control the camera 11 to observe the position of the stomach, until the pylorus where the upper duodenum and the stomach are connected is found, and the catheter tip is controlled to pass through the pylorus and enter the duodenum;

[0132] 8. Continue to advance until the catheter tip is observed through the camera to have passed through the ascending part of the duodenum and entered the duodenal jejunal flexure;

[0133] 9. Confirm the placement by the external length mark of the catheter;

[0134] 10. Remove the suction equipment and gas / water injection equipment and feed according to standard procedures;

[0135] 11. The stomach is connected to the exhaust device through the stomach hole and the stomach hole interface 24 to exhaust gas when necessary;

[0136] 12. Through the working hole interface 22 and the working hole 13, a collector can be placed to extract gastrointestinal features;

[0137] 13. Connect with the connection and fixing device on the bed through the fixing interface 26 to ensure external fixation;

[0138] 14. Place the external ground electrode on the inner ankle of the patient's right calf;

[0139] 15. Connect the external data line 29 to the operating handle 2 through the data interface 28, and use the external video display device and recording device to continuously observe and record the potentials of 11 electrodes in the digestive tract for a long time, including the upper esophagus, the middle esophagus, the lower esophagus, the cardia, the fundus of the stomach, the antrum of the stomach, the pylorus, the descending part of the duodenum, the horizontal part of the duodenum, the ascending part of the duodenum, and the jejunum. Since the digestive tract is in a closed state most of the time (without eating), the electrodes can fit with the corresponding positions of the digestive tract, thereby detecting the electrical activities at the corresponding positions;

[0140] 16. 24 hours non-stop or when observation is needed, connect the external data line 29 to the operating handle 2 through the data interface 28, and observe the insertion position through the external video display device. If displacement occurs, connect the external handle 210 to control the catheter to reach the specified position again.

[0141] Case 2

[0142] The catheter morphology was consistent with that in case 1.

[0143] Directions:

[0144] Other usage methods are the same as in case 1, except that:

[0145] Through external equipment, a suitable microcurrent Ii, such as 500μA (microampere) microcurrent, is applied to two or more specific electrodes in the digestive tract within a specific period of time (1 to 10 minutes), and the voltage Vi between the electrodes is measured at the same time, so that the bioimpedance Ri of the digestive tract between the electrodes can be calculated. The applied current is a sinusoidal alternating current, and by changing the frequency of the applied current (low-frequency current cannot pass through the cell membrane and is related to the extracellular fluid content, and high-frequency current can pass through the cell membrane and is related to the total amount of body fluid), static bioimpedance and dynamic bioimpedance can be measured. For example, when a sinusoidal alternating current with a frequency of 1 Hz is applied, the digestive tract bioimpedance obtained by measurement is a static bioimpedance index. By comparing it with the normal bioimpedance index of the human body, it can be determined whether there is inflammation or edema in this section of the digestive tract. When a sinusoidal alternating current with a frequency of 20 Hz is applied, the digestive tract bioimpedance obtained by measurement is a dynamic bioimpedance index, which means that the blood perfusion in this section of the digestive tract (blood supply to the digestive tract as the heart beats) can be measured. Compared with the patient's respiratory and electrocardiogram indicators, it can help determine whether there is insufficient blood perfusion in this section of the patient's digestive tract.

[0146] Case 3

[0147] The catheter morphology was consistent with that in case 1.

[0148] Directions:

[0149] Other usage methods are the same as in case 1, except that:

[0150] When the doctor determines that the patient's digestive tract has abnormal rhythm and needs electrical signal stimulation, an external device is used to apply a suitable voltage Vi to two or more specific electrodes in the digestive tract, such as a sinusoidal alternating voltage with a frequency of 30Hz, -1V and a duration of 1 minute, thereby regulating gastric function.

[0151] Case 4

[0152] In this case, the length of the catheter was adjusted, specifically the overall length of the catheter was adjusted to 80cm, and the method of use was changed to use it through gastric fistula.

[0153] Specifically, the catheter is inserted through the patient's gastrostomy. During this process, the stomach is flushed through the second cavity as needed to prevent the camera from being blocked by foreign objects in the body. Excessive intracavitary fluid is sucked through the working cavity 13. The catheter is pushed and rotated by the external handle. At the same time, the operating part 21 is controlled to drive the rotating wheel 27 and the traction wire 15 to control the snake bone 14 to move forward and adjust the direction and angle. The potential of 7 electrodes in the digestive tract, including the fundus of the stomach, the antrum of the stomach, the pylorus, the descending part of the duodenum, the horizontal part of the duodenum, the ascending part of the duodenum, and the jejunum, is continuously observed and recorded through an external video display device and a recording device.

[0154] The rest of the content in this case is the same as that in Case 1 and will not be repeated here.

[0155] Case 5

[0156] In this case, the length of the catheter was adjusted, specifically the overall length of the catheter was adjusted to 50cm, and the method of use was changed to enterostomy.

[0157] Specifically, the catheter is inserted through the patient's enterostomy. During this process, the intestine is flushed through the second cavity as needed to prevent the camera from being blocked by foreign objects in the body. Excessive intracavitary fluid is sucked through the working cavity 13. The catheter is pushed and rotated by the external handle. At the same time, the control operating member 21 drives the control wheel 27 and the traction wire 15 to control the snake bone 14 to move forward and adjust the direction and angle. The potential of the electrodes at the descending duodenum, the horizontal duodenum, the ascending duodenum, and the jejunum is continuously observed and recorded for a long time through an external video display device and a recording device.

[0158] The rest of the content in this case is the same as that in Case 1 and will not be repeated here.

[0159] Case 6

[0160] This case is for patients who do not need gastrointestinal feeding. In order to further improve the adaptability of long-term catheterization and not affect the patient's normal eating, the diameter of the catheter was adjusted, including:

[0161] 1) The outer diameter of the intestinal end of the catheter body 1 is Φ2mm, and the outer diameter of the esophagus and stomach ends is Φ3mm;

[0162] 2) The catheter wall at the electrode is convex 0.5mm, that is, the outer diameter is Φ4mm in the esophagus and stomach, and Φ3mm in the intestine;

[0163] 3) The camera 11 on the end face of the catheter body 1 adopts a self-sealed 40,000-pixel CMOS sensor with an outer envelope size of Φ0.5 mm.

[0164] 4) The working hole 13 of the catheter body 1 has a size of Φ0.5 mm.

[0165] The rest of the content in this case is the same as that in Case 1 and will not be repeated here.

[0166] The above are the implementation methods listed in this embodiment, but this embodiment is not limited to the above optional implementation methods. Those skilled in the art can arbitrarily combine the above methods to obtain other various implementation methods. Anyone can derive other various implementation methods under the inspiration of this embodiment. The above specific implementation methods should not be understood as limiting the protection scope of this embodiment. The protection scope of this embodiment should be based on the definition in the claims.

Claims

1. A multifunctional catheter for visually and controllably monitoring gastrointestinal potential, characterized in that: The invention comprises a catheter body (1), an operating handle (2), and an external component matched with the operating handle (2); a plurality of electrodes (110) are spaced apart on the catheter body (1), and the electrodes (110) are attached to the surface of the catheter body (1) to form a ring; a wire (111) matched with the electrode (110) is arranged in the catheter, and the wire (111) extends from the operating handle (2) to the electrode (110).

2. The multifunctional catheter for visually and controllably monitoring gastrointestinal potential according to claim 1, characterized in that: The electrode (110) is a circular ring structure as a whole, and a conductive surface or a plurality of conductive areas are formed on the outer surface of the circular ring structure. The conductive surface and the conductive area are smoothly transitioned and matched with the outer wall surface of the catheter.

3. The multifunctional catheter for visually and controllably monitoring gastrointestinal potential according to claim 2, characterized in that: The conductive surface or conductive area of ​​the electrode (110) protrudes from the peripheral surface of the catheter.

4. The multifunctional catheter for visually and controllably monitoring gastrointestinal potential according to claim 3, characterized in that: The surface of the catheter forms an annular protrusion (101) to smoothly match the conductive surface of the electrode (110), or the surface of the catheter forms a plurality of bulge-shaped protrusions (101) to smoothly match the conductive area of ​​the electrode (110).

5. The multifunctional catheter for visually and controllably monitoring gastrointestinal potential according to claim 2, characterized in that: The electrode (110) comprises a plurality of conductive blocks arranged in an array, and the conductive blocks are conductively connected to each other, and the surface of each conductive block is a conductive area.

6. The multifunctional catheter for visually and controllably monitoring gastrointestinal potential according to claim 2, characterized in that: The electrode (110) comprises a plurality of conductive strips arranged crosswise, a hollow structure is formed between the conductive strips, and a conductive area is formed on the surface of the conductive strips.

7. The multifunctional catheter for visually and controllably monitoring gastrointestinal potential according to claim 3, characterized in that: A micro-balloon for supporting and lifting the electrode (110) outward is formed on the catheter body (1), and an air path component matching the micro-balloon is arranged in the operating handle (2).

8. The multifunctional catheter for visually and controllably monitoring gastrointestinal potential according to claim 1, characterized in that: A coil (14) for controlling the bending direction is built into the catheter body (1), and the direction of the coil (14) is adjusted by a control mechanism; the tube hole of the catheter body (1) is a working cavity (13), and a first cavity for arranging an imaging component is formed in the tube wall of the catheter body (1), and a second cavity (17) for conveying gas and liquid, and a gastric orifice cavity (18) connected to the stomach cavity for material conveyance are also formed; the operating handle (2) is connected to the rear end of the catheter body (1), and includes a cavity opening structure that is connected and coordinated with the working cavity (13), the first cavity, the second cavity (17) and the gastric orifice cavity (18), and is used to control the movement of the catheter body (1); the external component is used to assist in holding, power supply, process and transmit signals, and connect a display device for real-time monitoring and transmit information to a data center, etc.

9. The multifunctional catheter for visually controllable gastrointestinal potential monitoring according to claim 8, characterized in that: The control mechanism comprises a plurality of traction wires (15), the front ends of which are connected to the front ends of the coiled tube (14) and are spaced apart on the circumference to pull the coiled tube (14) to bend in a corresponding direction, and the rear ends of the traction wires (15) extend to the operating handle (2) and are controlled by the operating handle (2).

10. The multifunctional catheter for visually and controllably monitoring gastrointestinal potential according to claim 8, characterized in that: The operating handle (2) is docked and connected to the catheter body (1), the first cavity is connected to the operating handle (2) and the internal imaging component communicates with the control circuit, the second cavity (17) is connected to the operating handle (2) and cooperates with the injection port (23), the gastric orifice cavity (18) is connected to the operating handle (2) and cooperates with the gastric orifice port (24), and the working cavity (13) is connected to the operating handle (2) and cooperates with the working port (22).

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