A visualization catheter and a cutting knife with the visualization catheter

Abstract

The present invention relates to a visualization catheter for minimally invasive interventional surgery of the pancreatic and bile ducts, comprising a catheter body and a traction wire as an incision knife, wherein the distal end of the catheter body can be bent, turned and rotated under the action of the traction wire to change the insertion direction and angle, and the catheter body is provided with a visual lumen and a working lumen, wherein the visual lumen is provided with a micro video image sensor and an illumination element at the distal end of the catheter body, and the distal end of the catheter body is also provided with a transparent cap for ensuring the field of view and increasing the field of view angle of the camera module. The present invention, through the support of the micro video image sensor and the transparent cap, is helpful for finding the lumen and determining its running direction, accurately guiding intubation and related diagnosis and treatment, can perform intubation under direct vision, can distinguish the pancreatic duct and the bile duct by observing the image, reduces or avoids the time of exposure of the operating physician and the patient to radiation, can improve the success rate of selective intubation, and reduces the occurrence of complications.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a visualization catheter and a cutting knife with a transparent cap for ensuring the visual field and capable of adjusting the direction of the visualization catheter. Background Art

[0002] Endoscopic retrograde cholangiopancreatography (ERCP) refers to the technique of inserting a duodenoscope into the descending part of the duodenum, finding the duodenal papilla, inserting a contrast catheter from the biopsy duct to the papilla opening, injecting contrast agent, and then taking an X-ray to display the pancreatic and bile ducts. On this basis, interventional treatments such as duodenal sphincterotomy, endoscopic nasobiliary drainage, endoscopic bile internal drainage, common bile duct lithotomy, bile and pancreatic duct tumor stent drainage, biopsy, local radiotherapy, and radiofrequency therapy can be performed.

[0003] With the advancement of imaging technology, MRCP has gradually replaced diagnostic ERCP due to its advantages of being non-invasive, free of X-ray radiation, and not requiring contrast agents, becoming the preferred diagnostic method for pancreatic and biliary diseases. ERCP has gradually shifted to the treatment of pancreatic and biliary diseases. Since ERCP does not require laparotomy, has little trauma, and a short operation time, it can greatly reduce the pain of patients, has fewer complications than surgical operations, and greatly shortens hospitalization time, making it very popular with patients. In just a few decades, ERCP has achieved great results in clinical practice and has become an important treatment for pancreatic and biliary diseases today.

[0004] The most critical and difficult technique in the operation is selective bile duct or pancreatic duct cannulation, because if the cannulation is unsuccessful, subsequent diagnosis and treatment cannot be performed. Through the improvement of the technique and the advancement of the instrument, the success rate of selective bile duct and pancreatic duct cannulation has been significantly improved, but the success rate after improvement is still unsatisfactory, and it needs to be performed under X-ray guidance, and the incidence of complications is high.

[0005] Especially when selectively cannulating the bile duct or pancreatic duct, the digestive tract mucosa will block the front end of the lens and affect observation, making it impossible to accurately find the cavity or observe the diseased mucosa, thus affecting the insertion of the scope and diagnosis, and even failing to insert the scope to the ideal position, affecting the diagnosis and treatment of the disease. Currently, there is no simple and safe method for selectively cannulating the bile and pancreatic ducts under direct vision without the help of X-rays or intracavitary ultrasound. Summary of the invention

[0006] The purpose of the present invention is to provide a visualization catheter to solve the problem that the digestive tract mucosa blocks the lens, affects the insertion of the lens, diagnosis and treatment, and realizes intubation and related diagnosis and treatment operations under direct vision. At the same time, it does not require X-ray guidance, and can be intubated under direct vision. The pancreatic duct and bile duct can be distinguished by observing the image, thereby reducing or avoiding the time of exposure of the operating physician and the patient to radiation, and at the same time can improve the success rate of selective intubation and reduce the occurrence of some complications. At the same time, other related diagnosis and treatment can be performed under direct vision.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] A visualization catheter, used for minimally invasive interventional surgery of the pancreatic and bile ducts, comprises a catheter body and a traction wire with direction adjustment and cutting functions, wherein the insertion end of the catheter body is the distal end and the other end is the proximal end, and the distal end of the catheter body can be bent and turned under the action of the traction wire;

[0009] The catheter body is provided with at least one visual cavity for accommodating the optical imaging system and a working cavity for auxiliary instruments to pass through. The visual cavity and the working cavity both pass through from the proximal end to the distal end of the catheter body. The visual cavity is provided with a miniature video image sensor and a lighting element at the distal end of the catheter body. The distal end of the catheter body is also provided with a transparent cap for ensuring the field of view and increasing the field of view angle of the camera module.

[0010] The present invention utilizes the support function of the miniature video image sensor and the front-end conical transparent cap to prop up the duct mucosa at the front end of the lens, ensure and widen the field of view, and help find the lumen and determine its running direction to guide the intubation. The video image sensor at the front transparent part can be used to ensure the field of view, thereby guiding the nipple intubation under direct vision, and guiding the further selective bile duct or pancreatic duct intubation under direct vision, and further selecting the common bile duct or common hepatic duct intubation under direct vision, and further selecting the left and right hepatic ducts and intrahepatic bile duct intubation under direct vision, avoiding the difficulties and possible complications caused by blind intubation.

[0011] Furthermore, the transparent cap is a conical transparent cap, or a round tube with a tapered front end, made of a fully transparent material, with a length of 0.1cm-5cm, preferably 0.2cm-2cm, gradually tapering, and an outer diameter of 0.1mm-4mm at the front end.

[0012] Furthermore, the miniature video image sensor and lighting element are 0.1cm-5cm away from the terminal, preferably 0.2cm-2cm away. The miniature video image sensor and lighting element may be in the same plane or not in the same plane to reduce the occupied cross-sectional area. At the same time, the two will not affect each other to cause viewing angle obstruction or unclear imaging (such as shadow area), and can effectively increase the field of view of the camera module.

[0013] Furthermore, a plurality of cavities are provided in the transparent cap, which can be used for repeated flushing and suction to wash out stones, pus, parasites, etc. in the bile and pancreatic ducts to ensure the field of vision and guide diagnosis and treatment under direct vision.

[0014] Furthermore, the catheter length is 180cm-260cm, and the front 160cm surface is coated with a super-slip coating to give the catheter good synchronous rotation. Combined with the traction wire, the direction of the catheter can be flexibly adjusted to facilitate insertion and superselection of the common bile duct, pancreatic duct, cystic duct, common hepatic duct, left and right hepatic ducts, and intrahepatic bile duct.

[0015] Furthermore, the miniature video image sensor is a tiny endoscope with a size of 0.1 to 4.0 mm.

[0016] Furthermore, a lighting element is provided on the side of the video image sensor, and the lighting element can be a tiny LED light group or other light source.

[0017] Furthermore, the transparent cap is integrally formed with the catheter body, or is detachably arranged on the catheter body.

[0018] Furthermore, the working cavity includes an injection cavity and / or a liquid suction cavity, and can be externally connected to an electric suction and water injection device.

[0019] The catheter can be used to deliver accessories from the access route to the target location in the pancreaticobiliary anatomy and displays real-time video when connected to a digital imaging controller.

[0020] The catheter is used in conjunction with a digital controller, which can provide the catheter with a light source and image processing functions. The doctor delivers the catheter to the diagnosis and treatment site through the working channel of the duodenoscope.

[0021] The miniature video image sensor transmits light from the controller to the distal terminal of the catheter through the catheter cable, and transmits the video signal captured by the video sensor to the controller for image processing and display;

[0022] A port is provided at the proximal end of the working channel, where accessories are inserted. A Y-port connector (packaging accessory) may also be optionally connected thereto to provide a sealing mechanism for accessories inserted into the working channel, while allowing liquid to be injected without removing the accessories.

[0023] The present invention passes a visualization catheter device through the biopsy hole of a duodenoscope to reach the papilla area of ​​the descending duodenum, and observes the papilla from a video image sensor. The visualization catheter device has the advantage that intubation can be performed under direct vision, and the pancreatic duct and bile duct can be distinguished by observing the image, thereby reducing or avoiding the exposure time of the operating physician and the patient to radiation, and at the same time improving the success rate of selective intubation and avoiding the occurrence of some complications.

[0024] The transparent cap with a conical structure at the front transparent part plays a supporting role, stretching the duct mucosa at the front end of the lens, ensuring and widening the field of view, and helping to find the lumen and determine its running direction to guide intubation. The video image sensor at the front transparent part can be used to ensure the field of view, thereby guiding the nipple intubation under direct vision, and guiding further selective bile duct or pancreatic duct intubation under direct vision, and further selecting the common bile duct or common hepatic duct intubation under direct vision, and further selecting the left and right hepatic ducts and intrahepatic bile duct intubation under direct vision, avoiding the difficulties and possible complications caused by blind intubation, and repeatedly flushing and suctioning to wash out stones, pus, parasites, etc. in the bile and pancreatic ducts to ensure a clear field of view, and guiding diagnosis and treatment under direct vision. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of a specific application of the visualization catheter of the present invention;

[0026] Figure 2 It is a schematic diagram of the local structure of the visualization catheter of the present invention;

[0027] Figure 3 for Figure 2 Schematic diagram of the cross section at A in the middle;

[0028] Figure 4 for Figure 2 Schematic diagram of the cross section at B;

[0029] Figure 5 for Figure 2 Schematic diagram of the cross section at C in the middle;

[0030] Figure 6 for Figure 2 Schematic diagram of the cross section at D or E;

[0031] In the figure: 1-catheter body; 2-traction wire; 3-operating handle; 4-working channel connector; 5-suction port; 6-flushing port; 7-cable connector; 8-outer tube; 9-transparent cap; 101-mini video image sensor; 102-illumination element; 103-suction tube or flushing tube; 104-working cavity; 105-visible cavity. DETAILED DESCRIPTION

[0032] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figure 1 , a cutter used for minimally invasive pancreaticobiliary interventional surgery with a visualization catheter.

[0034] Reference Figure 2-6The visualization catheter includes a catheter body 1 and a traction wire 2 as a cutting knife. The insertion end of the catheter body 1 is the distal end, and the other end is the proximal end. The distal end of the catheter body 1 can be bent and turned under the action of the traction wire 2, which is achieved by controlling the operating handle 3. The catheter body 1 is provided with a visual cavity 105 for accommodating an optical imaging system and a working cavity 104 for auxiliary instruments to pass through. The visual cavity 105 and the working cavity 104 are both through from the proximal end to the distal end of the catheter body 1. The visual cavity 104 is provided with a micro video image sensor 101 at the distal end of the catheter body 1. The distal end of the catheter body 1 is also provided with a transparent cap 9 for ensuring the field of view of the camera module.

[0035] Among them, the miniature video image sensor 101 is a tiny endoscope with a size of 0.1 to 4 mm. The side of the video image sensor 101 is provided with an illumination element 102, which can be a tiny LED lamp group or other light source. The miniature video image sensor 101 and the illumination element 102 are connected to the proximal cable connector 7 through a data line passing through the visual cavity 105. This setting can perform intubation under direct vision, and the pancreatic duct and bile duct can be distinguished by observing the image, which can reduce the exposure time of the operating physician and the patient to X-rays, and at the same time can improve the success rate of selective intubation, reduce the occurrence of some complications, and at the same time can perform other related diagnosis and treatment under direct vision.

[0036] The distance between the micro video image sensor and the lighting element and the terminal is 0.1cm-5cm, preferably 0.2cm-2cm. The micro video image sensor 101 and the lighting element 102 can be in the same plane or not in the same plane to reduce the occupied cross-sectional area. At the same time, the two will not affect each other to cause visual obstruction or unclear imaging (such as shadow area), which can effectively increase the field of view of the camera module.

[0037] The transparent cap 9 is a tubular transparent cap with a tapered front end, which is made of a fully transparent material, with an outer diameter of 0.1mm-4mm at the front end. The transparent cap is integrally formed with the catheter body, or is detachably arranged on the catheter body. The transparent cap with a tapered structure at the front transparent part plays a supporting role, which stretches the duct mucosa at the front end of the lens, ensures and widens the field of view, and helps to find the lumen and determine its running direction to guide the intubation. The video image sensor at the front transparent part can be used to ensure the field of view, thereby guiding the nipple intubation under direct vision, and guiding further selective bile duct or pancreatic duct intubation under direct vision, and further selecting the common bile duct or common hepatic duct intubation under direct vision, and further selecting the left and right hepatic ducts and intrahepatic bile duct intubation under direct vision, so as to avoid the difficulties and possible complications caused by blind intubation.

[0038] Figure 1 The figure is a schematic diagram of applying the visualization catheter of the present invention to a disposable bile and pancreatic duct imaging catheter.

[0039] The imaging catheter is provided with an operating handle 3, which can control the traction wire 2 to achieve the bending and turning of the distal end of the catheter body 1. The imaging catheter is provided with a suction port 5 or a flushing port 6 connected to the suction tube or flushing tube 103, and a working channel connector 4 connected to the working cavity 104, which can be connected to external devices respectively. A Y-type port connector (packaging accessory) can be optionally connected to the working cavity port accessory insertion point to provide a sealing mechanism for the accessories inserted in the working channel, and liquid can be injected without removing the accessories. The suction tube and the flushing tube 103 can be as follows Figure 3 You can set them individually or share a channel.

[0040] The catheter is used to deliver accessories from the access route to the target location in the pancreaticobiliary anatomical area and can display real-time video when connected to a digital imaging controller. The tiny endoscope and LED light group or other light source in the visual cavity transmit light from the controller to the distal end of the catheter through the catheter cable, and transmit the video signal captured by the video sensor to the controller for image processing and display. The catheter is used in conjunction with a digital controller, which can provide the catheter with light source and image processing functions. The doctor delivers the catheter to the diagnosis and treatment site through the working channel of the duodenoscope.

[0041] At the beginning of the operation, the catheter is passed through the duodenoscope or other endoscope into the duodenal papilla, so that the catheter contacts the papilla. At this time, part of the transparent cap at the distal end of the catheter enters the papilla, and the transparent cap is used to open the papilla opening, observe the duct in the papilla, determine the direction of the bile duct and pancreatic duct, and insert the catheter along the bile duct or pancreatic duct. At the same time, the catheter can be further selectively inserted. If insertion is difficult, the insertion direction can be adjusted by tightening or loosening or rotating the catheter with a scalpel, and the insertion can be made easier by combining the adjustment of the duodenoscope or other endoscope. If the papilla is small and deep insertion is difficult, the papilla can be cut with a scalpel to make it easier for the catheter to enter the duct. Other instruments, such as sampling forceps, can be inserted from the working channel of the catheter. Under visual support, the lesion can be directly removed or the tissue can be grasped. The end of the conical transparent cap is provided with an injection or suction pipe, which has a higher flushing efficiency. The syringe or aspirator can be connected at the same time. The injection water is convenient for flushing the human cavity to facilitate observation.

[0042] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A visualization catheter for minimally invasive pancreatic and bile duct interventional surgery, comprising a catheter body and a traction wire with direction adjustment and incision functions, wherein the insertion end of the catheter body is the distal end and the other end is the proximal end, and the distal end of the catheter body can be bent and turned under the action of the traction wire; It is characterized in that The catheter body is provided with at least one visual cavity for accommodating the optical imaging system and a working cavity for the auxiliary instrument to pass through, and both the visual cavity and the working cavity are connected from the proximal end to the distal end of the catheter body. The visual cavity is provided with a miniature video image sensor and a lighting element at the distal end of the catheter body. The distal end of the catheter body is also provided with a transparent cap for ensuring the field of view and increasing the field of view angle of the camera module; the transparent cap is a conical transparent cap, or a round tube with a conical front end, and is made of a fully transparent material; the miniature video image sensor is a tiny endoscope, the size of which is 0.2~4.0mm, and the distance from the terminal is 0.1cm-5cm.

2. A visualization catheter according to claim 1, It is characterized in that The transparent cap has a length of 0.1 cm to 5 cm, gradually becomes thinner, and has an outer diameter of 0.1 mm to 4 mm at the end.

3. A visualization catheter according to claim 2, It is characterized in that The transparent cap is integrally formed with the catheter body, or is detachably arranged on the catheter body.

4. A visualization catheter according to claim 1, It is characterized in that The lighting element is at a distance of 0.1 cm to 5 cm from the terminal.

5. A visualization catheter according to claim 1, It is characterized in that The working cavity includes an injection cavity and / or a liquid suction cavity, and can be externally connected to an electric suction or water injection device.

6. A visualization catheter according to claim 1, It is characterized in that The surface of the catheter body is coated with a super-slip coating.

7. A visualization catheter according to claim 1, It is characterized in that The working length of the catheter is 150cm-350cm, and the diameter at the end gradually decreases from 1.7mm-3.6mm to 0.5mm-3mm.

8. A visualization catheter according to claim 7, It is characterized in that The catheter has 2-5 independent lumens with an inner diameter of 1-2.5 mm.

9. A cutting knife, It is characterized in that The incision knife is provided with a visualization catheter as claimed in any one of claims 1-8.

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