Disposable balloon stone extraction catheter

Abstract

The application relates to the technical field of medical devices, in particular to a disposable balloon stone extraction catheter which comprises a catheter main body, a balloon, a tee joint, two groups of mounting assemblies, a liquid injection interface, a gas injection interface, a branch pipe, a guide piece, a guide head and an image collector; the tee joint is arranged at one end of the catheter main body, the liquid injection interface and the gas injection interface are connected with the tee joint through corresponding mounting assemblies respectively, the branch pipe is connected with the tee joint, the guide piece is arranged in the catheter main body, and the guide head is connected with the guide piece; the image collector is connected with the guide head; the mounting assembly comprises a positioning pipe, a connecting pipe, a sliding piece, a spring, a sleeve and a locking block; the positioning pipe is connected with the liquid injection interface or the gas injection interface, the connecting pipe is connected with the tee joint, and the sleeve is fixedly connected with the positioning pipe; in this way, the technical problem that the liquid injection joint and the gas injection joint need to be discarded and the cost is high when the balloon stone extraction catheter in the prior art is discarded after use is solved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a disposable balloon lithotripsy catheter. Background Technology

[0002] Balloon lithotripsy catheters are medical devices commonly used in minimally invasive interventional surgeries. They are primarily suitable for removing stones from natural or artificial cavities within the body, such as bile duct stones and urinary system stones. These catheters typically consist of a catheter body, a balloon, connectors, and a filling channel. Their working principle involves inserting the catheter into the location of the stone via an endoscope or puncture channel, then inflating the balloon by injecting a medium. The balloon's pushing, pulling, or dragging action then removes the stone from the body.

[0003] However, when existing balloon stone removal catheters are discarded after use, both the external fluid injection connector and the air injection connector must be discarded, which is costly. Summary of the Invention

[0004] The purpose of this invention is to provide a disposable balloon stone retrieval catheter, which solves the technical problem that in the prior art, both the fluid injection connector and the air injection connector need to be discarded after use, resulting in high costs.

[0005] To achieve the above objectives, the present invention provides a disposable balloon lithotripsy catheter, comprising a catheter body, a balloon, a three-way connector, two sets of installation components, an injection port, an inflation port, a branch tube, a guide, a guide head, and an image acquisition device; The balloon is disposed on the catheter body, the three-way connector is disposed at one end of the catheter body, the liquid injection port and the gas injection port are respectively connected to the three-way connector through the corresponding mounting components, the branch tube is connected to the three-way connector, the guide is disposed inside the catheter body, the guide head is connected to the guide, and the image acquisition device is connected to the guide head. The mounting assembly includes a positioning tube, a connecting tube, a sliding member, a spring, a sleeve, and a locking block. The positioning tube is connected to the liquid injection port or the gas injection port. The connecting tube is connected to the tee connector. The sleeve is fixedly connected to the positioning tube and has a guide groove. The sliding member is slidably connected to the guide groove. The two ends of the spring are fixedly connected to the sliding member and the sleeve, respectively. The positioning tube has an installation groove and a through hole. The connecting tube is placed in the installation groove and has a locking groove. The locking block is slidably connected to the through hole and placed in the locking groove. The sliding member has a groove.

[0006] The sliding member includes a displacement ring and a force-applying ring. The displacement ring is slidably connected to the guide groove, and the force-applying ring is fixedly connected to the displacement ring. The force-applying ring has a chamfered structure, and the positioning tube has a rounded corner structure.

[0007] The guide head is a thermoplastic polyurethane elastomer soft head or a silicone rubber soft head; the surface of the guide is coated with a hydrophilic lubricating coating, which is a polyvinylpyrrolidone coating, a polyethylene glycol coating, or a polyacrylamide coating.

[0008] The balloon is made of nylon 12, polyurethane or block polyether amide resin material by blow molding process.

[0009] The catheter body is made of medical-grade polyether block amide, polytetrafluoroethylene or polyamide material by extrusion molding; the three-way connector is made of polycarbonate or acrylonitrile-butadiene-styrene copolymer material by injection molding.

[0010] The image acquisition device includes: an image acquisition module, an illumination module, an analog-to-digital conversion module, an image preprocessing module, and a signal transmission module; The image acquisition module is a miniature CMOS image sensor or a CCD image sensor, used to acquire real-time images of the bile duct or pancreatic duct. The lighting module includes at least two LED light sources symmetrically arranged around the image acquisition module to provide adjustable brightness lighting; The analog-to-digital converter module is used to convert the analog signal output by the image acquisition module into a digital signal; The image preprocessing module includes a field-programmable gate array or a digital signal processor, used to perform bad pixel correction, gamma correction, white balance adjustment and demosaic algorithms on digital image signals; The signal transmission module uses low-voltage differential signal or coaxial cable transmission to send the processed image data to an external computer.

[0011] The image preprocessing module includes an image enhancement unit and an edge detection unit. The image enhancement unit uses an adaptive histogram equalization algorithm or a contrast-limited adaptive histogram equalization algorithm to enhance image contrast. The edge detection unit uses the Canny operator or the Sobel operator to extract the stone contour and mark the stone boundary position.

[0012] This invention provides a disposable balloon stone retrieval catheter. In practical use, the catheter body is inserted into the bile duct, the stone is accurately located, and the balloon passes through the stone. Inflation is then performed through the inflation connector to inflate the balloon, followed by stone removal. After use, when some disposable components need to be discarded, pressing the sliding member causes the spring to contract and the groove to move, aligning the groove with the through hole. Pulling the corresponding part of the tee connector moves the corresponding connecting tube. As the connecting tube moves, it presses against the locking block, which slides within the through hole, placing the locking block in the groove. Continuing to pull slides the connecting tube out of the mounting groove, completing disassembly. This avoids discarding the injection or inflation connectors, and facilitates installation. This method solves the technical problem in existing balloon stone retrieval catheters where both the injection and inflation connectors must be discarded after use, resulting in high costs. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0014] Figure 1 This is a schematic diagram of the structure of the present invention.

[0015] Figure 2 This is a partial structural schematic diagram of the present invention.

[0016] Figure 3 This is the invention Figure 2 A cross-sectional view of the AA line structure.

[0017] Figure 4 This is a block diagram illustrating the principle of the image acquisition device of the present invention.

[0018] In the diagram: 1-Catheter body, 2-Balloon, 3-T-connector, 4-Injection port, 5-Injection port, 6-Branch tube, 7-Guide component, 8-Guide head, 9-Image acquisition unit, 10-Positioning tube, 11-Connecting tube, 12-Spring, 13-Sleeve, 14-Locking block, 15-Displacement ring, 16-Force ring, 17-Image acquisition module, 18-Illumination module, 19-Analog-to-digital conversion module, 20-Image preprocessing module, 21-Signal transmission module, 22-Image enhancement unit, 23-Edge detection unit, 24-Image defogging module, 25-Stone size measurement module. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0020] Please refer to Figures 1 to 4 , Figure 1 This is a schematic diagram of the structure of the present invention. Figure 2 This is a partial structural schematic diagram of the present invention. Figure 3 This is the invention Figure 2 A cross-sectional view of the AA line structure. Figure 4 This is a schematic diagram of the image acquisition device of the present invention. An embodiment of the present invention provides a disposable balloon stone retrieval catheter, including a catheter body 1, a balloon 2, a three-way connector 3, two sets of installation components, an injection port 4, an inflation port 5, a branch pipe 6, a guide 7, a guide head 8, and an image acquisition device 9; the installation components include a positioning tube 10, a connecting tube 11, a sliding component, a spring 12, a sleeve 13, and a locking block 14; the sliding component includes a displacement ring 15 and a force-applying ring 16; the image acquisition device 9 includes an image acquisition module 17, an illumination module 18, an analog-to-digital conversion module 19, an image preprocessing module 20, and a signal transmission module 21; the image preprocessing module 20 includes an image enhancement unit 22 and an edge detection unit 23; the aforementioned solution solves the technical problem in the prior art where both the injection and inflation connectors of the balloon stone retrieval catheter must be discarded after use, resulting in high costs.

[0021] In this specific embodiment, the balloon 2 is disposed on the catheter body 1, the three-way connector 3 is disposed at one end of the catheter body 1, the liquid injection port 4 and the gas injection port 5 are respectively connected to the three-way connector 3 through corresponding mounting components, the branch pipe 6 is connected to the three-way connector 3, the guide member 7 is disposed inside the catheter body 1, the guide head 8 is connected to the guide member 7, the image acquisition device 9 is connected to the guide head 8, the positioning tube 10 is connected to the liquid injection port 4 or the gas injection port 5, the connecting tube 11 is connected to the three-way connector 3, the sleeve 13 is fixedly connected to the positioning tube 10, the sleeve 13 has a guide groove, the sliding member is slidably connected to the guide groove, the two ends of the spring 12 are respectively fixedly connected to the sliding member and the sleeve 13, the positioning tube 10 has an installation groove and a through hole, the connecting tube 11 is placed in the installation groove, the connecting tube 11 has a locking groove, the locking block 14 is slidably connected to the through hole and placed in the locking groove, and the sliding member has a groove. In practical use, the catheter body 1 is inserted into the bile duct, the location of the stone is accurately positioned, and the balloon 2 passes through the stone. Inflation of the balloon 2 is then performed through the inflation connector 5, followed by stone removal. After use, when some disposable components need to be discarded, pressing the sliding member causes the spring 12 to contract and the groove to move, aligning the groove with the through hole. Pulling the corresponding part of the tee connector 3 moves the corresponding connecting tube 11. As the connecting tube 11 moves, it presses against the locking block 14, which slides within the through hole, placing the locking block 14 in the groove. Continuing to pull slides the connecting tube 11 out of the mounting groove, completing the disassembly. This avoids discarding the injection port 4 or the inflation port 5, and facilitates installation. This method solves the technical problem in existing balloon stone removal catheters where both the injection and inflation connectors need to be discarded after use, resulting in high costs.

[0022] The displacement ring 15 is slidably connected to the guide groove, and the force-applying ring 16 is fixedly connected to the displacement ring 15. The force-applying ring 16 has a chamfered structure, and the positioning tube 10 has a rounded corner structure. The force-applying ring 16 can more easily apply force to drive the displacement ring 15 to move.

[0023] Secondly, the guide head 8 is a thermoplastic polyurethane elastomer soft head or a silicone rubber soft head; the surface of the guide member 7 is coated with a hydrophilic lubricating coating, which is a polyvinylpyrrolidone coating, a polyethylene glycol coating, or a polyacrylamide coating.

[0024] The balloon 2 is made of nylon 12, polyurethane or block polyether amide resin material by blow molding process.

[0025] The catheter body 1 is made of medical-grade polyether block amide, polytetrafluoroethylene or polyamide material by extrusion molding; the three-way connector 3 is made of polycarbonate or acrylonitrile-butadiene-styrene copolymer material by injection molding.

[0026] Meanwhile, the image acquisition module 17 is a miniature CMOS image sensor or CCD image sensor, used to acquire real-time images of the bile duct or pancreatic duct; The lighting module 18 includes at least two LED light sources symmetrically arranged around the image acquisition module 17 for providing adjustable brightness lighting; The analog-to-digital conversion module 19 is used to convert the analog signal output by the image acquisition module 17 into a digital signal; The image preprocessing module 20 includes a field-programmable gate array or a digital signal processor, used to perform bad pixel correction, gamma correction, white balance adjustment and demosaic algorithms on digital image signals. The signal transmission module 21 uses low-voltage differential signal or coaxial cable transmission to send the processed image data to an external computer.

[0027] Furthermore, the image enhancement unit 22 uses an adaptive histogram equalization algorithm or a contrast-limited adaptive histogram equalization algorithm to enhance image contrast; the edge detection unit 23 uses the Canny operator or the Sobel operator to extract the stone contour and mark the stone boundary position.

[0028] Furthermore, the image acquisition unit 9 also includes an image dehazing module 24, which uses a dark channel prior algorithm or a fast dehazing algorithm based on an atmospheric scattering model to perform dehazing enhancement processing on the acquired wet environment image.

[0029] Finally, the image acquisition device 9 also includes a stone size measurement module 25, which includes at least two equally spaced reference point light sources or a calibration unit based on the geometry of the guide head 8, used to calculate the maximum transverse diameter of the stone according to the ratio of the number of pixels occupied by the stone in the image to the calibration reference value.

[0030] Working principle: In actual use, the catheter body 1 is inserted into the bile duct, the location of the stone is accurately positioned, and the balloon 2 passes through the stone. Inflation is performed through the inflation connector 5 to inflate the balloon 2. Then, the stone is removed. After use, when some disposable components need to be discarded, the sliding member is pressed, which causes the spring 12 to contract and move the groove so that the groove is aligned with the through hole. Then, the corresponding part of the three-way connector 3 is pulled to move the corresponding connecting tube 11. As the connecting tube 11 moves, it abuts against the locking block 14 and slides it in the through hole, so that the locking block 14 is placed in the groove. Continue pulling to slide the connecting tube 11 out of the mounting groove to complete the disassembly. This avoids the need to discard the liquid injection interface 4 or the inflation interface 5, and facilitates installation. This method solves the technical problem of the existing balloon stone removal catheter, where both the liquid injection connector and the inflation connector need to be discarded after use, which is costly.

[0031] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A disposable balloon lithotripsy catheter, characterized in that, It includes the catheter body, balloon, three-way connector, two sets of installation components, liquid injection port, gas injection port, branch tubing, guide components, guide head, and image acquisition device; The balloon is disposed on the catheter body, the three-way connector is disposed at one end of the catheter body, the liquid injection port and the gas injection port are respectively connected to the three-way connector through the corresponding mounting components, the branch tube is connected to the three-way connector, the guide is disposed inside the catheter body, the guide head is connected to the guide, and the image acquisition device is connected to the guide head. The mounting assembly includes a positioning tube, a connecting tube, a sliding member, a spring, a sleeve, and a locking block. The positioning tube is connected to the liquid injection port or the gas injection port. The connecting tube is connected to the tee connector. The sleeve is fixedly connected to the positioning tube and has a guide groove. The sliding member is slidably connected to the guide groove. The two ends of the spring are fixedly connected to the sliding member and the sleeve, respectively. The positioning tube has an installation groove and a through hole. The connecting tube is placed in the installation groove and has a locking groove. The locking block is slidably connected to the through hole and placed in the locking groove. The sliding member has a groove.

2. The disposable balloon lithotripsy catheter as described in claim 1, characterized in that, The sliding component includes a displacement ring and a force-applying ring. The displacement ring is slidably connected to the guide groove, and the force-applying ring is fixedly connected to the displacement ring. The force-applying ring has a chamfered structure, and the positioning tube has a rounded corner structure.

3. The disposable balloon lithotripsy catheter as described in claim 2, characterized in that, The guide head is a thermoplastic polyurethane elastomer soft head or a silicone rubber soft head; the surface of the guide is coated with a hydrophilic lubricating coating, which is a polyvinylpyrrolidone coating, a polyethylene glycol coating, or a polyacrylamide coating.

4. The disposable balloon lithotripsy catheter as described in claim 3, characterized in that, The balloon is made of nylon 12, polyurethane, or block polyetheramide resin material by blow molding.

5. The disposable balloon lithotripsy catheter as described in claim 4, characterized in that, The catheter body is made of medical-grade polyether block amide, polytetrafluoroethylene or polyamide material by extrusion molding; the three-way connector is made of polycarbonate or acrylonitrile-butadiene-styrene copolymer material by injection molding.

6. The disposable balloon lithotripsy catheter as described in claim 5, characterized in that, The image acquisition device includes: an image acquisition module, an illumination module, an analog-to-digital conversion module, an image preprocessing module, and a signal transmission module; The image acquisition module is a miniature CMOS image sensor or a CCD image sensor, used to acquire real-time images of the bile duct or pancreatic duct. The lighting module includes at least two LED light sources symmetrically arranged around the image acquisition module to provide adjustable brightness lighting; The analog-to-digital converter module is used to convert the analog signal output by the image acquisition module into a digital signal; The image preprocessing module includes a field-programmable gate array or a digital signal processor, used to perform bad pixel correction, gamma correction, white balance adjustment and demosaic algorithms on digital image signals; The signal transmission module uses low-voltage differential signal or coaxial cable transmission to send the processed image data to an external computer.

7. The disposable balloon lithotripsy catheter as described in claim 6, characterized in that, The image preprocessing module includes an image enhancement unit and an edge detection unit; the image enhancement unit uses an adaptive histogram equalization algorithm or a contrast-limited adaptive histogram equalization algorithm to enhance image contrast; the edge detection unit uses the Canny operator or the Sobel operator to extract the stone contour and mark the stone boundary position.

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