Double-cavity catheter and confocal probe assembly

Abstract

The double-cavity catheter comprises an operating handle and a catheter, the operating handle is provided with a guide wire guiding channel, a confocal probe guiding channel and a catheter containing cavity, the rear end of the catheter is arranged in the catheter containing cavity, and the interior of the catheter is divided into a guide wire cavity channel and a confocal probe cavity channel. The guide wire cavity channel and the guide wire guiding channel are communicated through a leading-in opening formed in the catheter to form an obtuse angle; a guide block is further arranged on the side, close to the rear end of the catheter, of the leading-in opening. The guide wire is steered through the guide block so as to adapt to the guide wire guide channel and the guide wire cavity channel, the control convenience of the guide wire is improved, and the guide block is integrally arranged in the catheter or the operation handle, so that the whole device is more compact in structure and more convenient to use in the assembling process. The utility model further provides a confocal probe assembly, the confocal probe assembly comprises the double-cavity catheter, a confocal probe, a guide wire and a confocal handle, the confocal probe and the guide wire are inserted into the double-cavity catheter at the same time, convenience of biliopancreatic duct imaging is improved, and operation risks are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of endoscopes, in particular to a double-lumen catheter and a confocal probe assembly of an endoscope. Background Art

[0002] Endoscopic retrograde cholangiopancreatography (ERCP) involves inserting a duodenoscope into the descending duodenum, identifying the duodenal papilla, and then inserting a contrast catheter through the biopsy duct to the papilla opening. After contrast agent is injected, X-rays are taken to visualize the pancreatic and bile ducts. Because ERCP requires no surgery, it is less invasive, has a shorter operative time, and has fewer complications than surgery, significantly shortening hospital stays, making it a popular procedure for patients. In the field of biliary and pancreatic duct imaging, commonly used intubation methods are guidewire and blind insertion. The blind insertion method requires high technical requirements and can easily cause damage to the bile duct and pancreatic duct, leading to complications. With the guidewire method, the guidewire occupies the catheter channel, requiring the guidewire to be removed before inserting another instrument during instrument exchange. This process can cause cross-infection and cause pain to the patient. With the development of confocal microendoscopy, which utilizes a confocal microscope to observe tissues and more accurately diagnose disease, there is an urgent need for a medical catheter device that allows for independent insertion of the guidewire and probe to improve diagnostic and treatment efficiency. Utility Model Content

[0003] The present utility model aims to solve at least one of the above-mentioned technical problems and provides a double-lumen catheter, comprising an operating handle 2 and a catheter 1 at one end of which is arranged in the operating handle 2. A guidewire guide channel 21, a confocal probe guide channel 22, and a catheter accommodating cavity 24 are provided inside the operating handle 2. The rear end of the catheter 1 is arranged in the catheter accommodating cavity 24. The confocal probe guide channel 22 and the catheter accommodating cavity 24 are in a straight line. The guidewire guide channel 21 intersects with the catheter accommodating cavity 24 at an obtuse angle. The interior of the catheter 1 is divided into a guidewire cavity 11 and a confocal probe cavity 12. The guidewire cavity 11 is connected to the guidewire guide channel 21 through an introduction port 13 provided on the catheter; the confocal probe cavity 12 is connected to the confocal probe guide channel 22, and a guide block 3 is further provided on the side of the introduction port close to the rear end of the catheter.

[0004] Furthermore, the confocal probe guiding channel 22 is aligned with the confocal probe cavity 12 at the connection point and has the same shape and inner diameter.

[0005] Furthermore, the guide block 3 is a trapezoidal block with an inclined front end, and the upper base of the trapezoidal block slightly protrudes into the guide wire guiding channel 21 .

[0006] Furthermore, the guide block 3 is integrally formed with the catheter 1 or integrally formed with the operating handle.

[0007] Furthermore, an arc-shaped guiding surface 23 is provided on a surface of the guide wire guiding channel 21 adjacent to the confocal probe guiding channel 22 .

[0008] Furthermore, a downward pressing tongue 4 is provided at the front end of the introduction port 13 .

[0009] Furthermore, a catheter distance mark 14 is provided on the outer surface of the front end of the catheter 1, and a catheter development mark 15 is provided inside the front end of the guidewire cavity 11.

[0010] The dual-lumen catheter of the present invention utilizes a confocal probe guide channel and a guidewire guide channel provided within an operating handle, and a confocal probe lumen and a guidewire lumen provided within the catheter, connecting the guidewire guide channel and the guidewire lumen to allow the guidewire to enter and exit the human body. The confocal probe guide channel and the confocal probe lumen are connected to allow the probe to enter and exit the human body, so that the probe and the guidewire can operate independently of each other and can work simultaneously, thereby facilitating the user to diagnose and treat the patient's affected area using a guidewire method. When the guidewire is inserted into the guidewire guide channel, the guide block guides the direction of the guidewire so that the guidewire can enter the designated lumen along the required route to adapt to the steering of the guidewire guide channel and the guidewire lumen, thereby improving the convenience of guidewire manipulation. By integrally providing the guide block in the catheter or operating handle, the entire device becomes more compact and easier to use during assembly. Simultaneously, a marking portion at the front end of the catheter is utilized to facilitate identification of the length and position of the catheter during diagnosis and treatment.

[0011] The utility model also provides a confocal probe assembly, comprising any of the double-lumen catheters described above.

[0012] Furthermore, it also includes a confocal probe 6, a guide wire 5 and a confocal handle 61. The confocal probe 6 can pass through the confocal probe cavity 12 and the confocal probe guide channel 22, and one end of it is connected to the confocal handle 61. The guide wire 5 passes through the guide wire guide channel 21 and the guide wire cavity 11.

[0013] Furthermore, the confocal probe 6 is an optical fiber or a combination of an objective lens and an optical fiber.

[0014] The confocal probe assembly of the present invention simultaneously inserts the confocal probe composed of an optical fiber or an objective lens and an optical fiber, and a guide wire into the double-lumen catheter of the present invention, thereby improving the convenience of bile and pancreatic duct imaging and reducing surgical risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the cross-sectional structure of a confocal probe assembly in an embodiment of the present utility model;

[0016] Figure 2This is a schematic diagram of the cross-sectional structure of a double-lumen catheter in an embodiment of the present utility model;

[0017] Figure 3 This is a schematic cross-sectional view of the operating handle in an embodiment of the present utility model;

[0018] Figure 4 This is a schematic diagram of the catheter structure in an embodiment of the present utility model;

[0019] Figure 5 This is a schematic cross-sectional view of another operating handle in an embodiment of the present utility model.

[0020] Among them: 1. Catheter; 11. Guidewire cavity; 12. Confocal probe cavity; 13. Introduction port; 14. Distance mark; 15. Development mark; 2. Operating handle; 21. Guidewire guide channel; 22. Confocal probe guide channel; 23. Arc-shaped guide surface; 24. Catheter accommodating cavity; 3. Guide block; 4. Depressing tongue; 5. Guidewire; 6. Confocal probe; 61. Confocal handle. DETAILED DESCRIPTION

[0021] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0022] Example 1

[0023] like Figure 1-4 As shown, a dual-lumen catheter comprises an operating handle 2 and a catheter 1 with one end disposed within the operating handle 2. The operating handle 2 is internally provided with a guidewire guide channel 21, a confocal probe guide channel 22, and a catheter accommodating cavity 24. The rear end of the catheter 1 is disposed within the catheter accommodating cavity 24. The confocal probe guide channel 22 and the catheter accommodating cavity 24 are aligned, and the guidewire guide channel 21 intersects the catheter accommodating cavity 24 at an obtuse angle. The interior of the catheter 1 is divided into a guidewire lumen 11 and a confocal probe lumen 12. The guidewire lumen 11 and the guidewire guide channel 21 are connected via an inlet 13 provided on the catheter.

[0024] The confocal probe cavity 12 is connected to the confocal probe guide channel 22. The connection between the confocal probe guide channel 22 and the confocal probe cavity 12 is aligned and has the same shape and inner diameter, so that the confocal probe can smoothly enter the confocal probe cavity 12 from the confocal probe guide channel 22.

[0025] A guide block 3 is also provided on the side of the introduction port close to the rear end of the catheter. The guide block 3 is a trapezoidal block with a sloped front end. The upper bottom of the trapezoidal block slightly protrudes into the guide wire guide channel 21. The guide block 3 is integrally formed with the catheter 1 or integrally formed with the operating handle.

[0026] like Figure 3 As shown, a slightly raised arc-shaped guide surface 23 is provided on one side of the guide wire guide channel 21 adjacent to the confocal probe guide channel 22. After the guide wire enters the guide wire introduction channel, the guide wire head is slightly bent upward under the action of the arc-shaped guide surface 32 to overcome the effect of gravity so that the guide wire head will not be tightly attached to the guide wire introduction channel.

[0027] The front end of the catheter 1 is provided with a catheter distance mark 14, and the front end of the guidewire cavity 11 is provided with a catheter imaging mark 15. Figure 4 As shown, there are three catheter distance markers 13, and the distances between the three catheter distance markers 14 and the front end of the catheter are 10mm, 20mm, and 50mm, respectively. A catheter imaging marker is provided at the front end of the catheter, and a distance marker is provided in the middle of the catheter. During actual operation of the catheter, the position of the catheter can be identified by the catheter imaging marker at the front end, avoiding the problem of being unable to locate the catheter during insertion. There is a distance display marker on the outer surface of the catheter, and the length of the distance display marker can be designed to be 10mm, 20mm, or 50mm as required. When it is used, it will be selected according to the specific situation of the patient. Generally, patients will undergo imaging examinations in the early stage, and the specific range and size of the lesion location can be determined through imaging examinations. The distance display marker can effectively identify the length of the probe entering, and by controlling the length of the probe entering, the lesion location can be accurately detected.

[0028] Example 2

[0029] like Figure 1-5 As shown, based on the embodiment 1, the front end of the introduction port 13 is further provided with a downward pressing tongue 4, as shown in FIG. Figure 5 As shown, at the end of the guidewire guiding channel, the guidewire head turns under the guidance of the guide block 3, and the downward pressing tongue 4 limits the guidewire head in time to prevent it from deviating greatly in turning, so as to smoothly enter the guidewire cavity.

[0030] Example 3

[0031] like Figure 1As shown, a confocal probe assembly includes any of the dual-lumen catheters described in the previous embodiments, as well as a confocal probe 6, a guidewire 5, and a confocal handle 61. The confocal probe 6 can pass through the confocal probe lumen 12 and the confocal probe guide channel 22, and one end of the confocal probe 6 is connected to the confocal handle 61. The guidewire 5 passes through the guidewire guide channel 21 and the guidewire lumen 11. The confocal probe 6 is an optical fiber or a combination of an objective lens and an optical fiber.

[0032] When diagnosis and treatment is required, the probe is passed through the confocal probe guide channel and the confocal probe cavity, and the guide wire is passed through the guide wire guide channel and the guide wire cavity. The probe and guide wire are respectively manipulated during diagnosis and treatment, thereby avoiding the trouble of replacing medical equipment, reducing the possibility of surgical infection, and improving the efficiency of diagnosis and treatment. At the same time, a guide block is provided at the introduction port. When manipulating the guide wire to move inside the catheter, the guide block can conveniently guide the guide wire to turn, thereby smoothly entering the guide wire cavity, thereby improving its convenience of manipulation. At the same time, the marking part is used to facilitate the user to judge the length and position of the catheter entry.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0035] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0036] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0038] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A double-lumen catheter, characterized in that: The invention comprises an operating handle (2), a catheter (1) with one end arranged in the operating handle (2), a guide wire guide channel (21), a confocal probe guide channel (22), and a catheter accommodating cavity (24) being provided inside the operating handle (2), the rear end of the catheter (1) being arranged in the catheter accommodating cavity (24), the confocal probe guide channel (22) and the catheter accommodating cavity (24) being in a straight line, the guide wire guide channel (21) and the catheter accommodating cavity (24) intersecting at an obtuse angle, the interior of the catheter (1) being divided into a guide wire cavity (11) and a confocal probe cavity (12), the guide wire cavity (11) and the guide wire guide channel (21) being connected via an introduction port (13) provided on the catheter; the confocal probe cavity (12) and the confocal probe guide channel (22) being connected, and a guide block (3) being further provided on the side of the introduction port close to the rear end of the catheter.

2. A double-lumen catheter according to claim 1, characterized in that: The connection between the confocal probe guide channel (22) and the confocal probe cavity (12) is aligned and has the same shape and inner diameter.

3. A double-lumen catheter according to claim 1, characterized in that: The guide block (3) is a trapezoidal block with an inclined front end, and the upper base of the trapezoidal block slightly protrudes into the guide wire guiding channel (21).

4. A double-lumen catheter according to claim 3, characterized in that: The guide block (3) is integrally formed with the catheter (1) or integrally formed with the handle.

5. The double-lumen catheter according to claim 1, characterized in that: An arc-shaped guide surface (23) is provided on a side of the guide wire guide channel (21) adjacent to the confocal probe guide channel (22).

6. A double-lumen catheter according to claim 1, characterized in that: The front end of the introduction port (13) is also provided with a downward pressing tongue (4).

7. The double-lumen catheter according to claim 1, characterized in that: A catheter distance mark (14) is provided on the outer surface of the front end of the catheter (1), and a catheter development mark (15) is provided inside the front end of the guidewire cavity (11).

8. A confocal probe assembly, characterized in that: The invention comprises a double-lumen catheter as described in any one of claims 1 to 7.

9. The confocal probe assembly according to claim 8, characterized in that: The invention also comprises a confocal probe (6), a guide wire (5) and a confocal handle (61); the confocal probe (6) can pass through the confocal probe cavity (12) and the confocal probe guide channel (22), and one end of the confocal probe (6) is connected to the confocal handle (61); the guide wire (5) passes through the guide wire guide channel (21) and the guide wire cavity (11).

10. The confocal probe assembly according to claim 9, characterized in that: The confocal probe (6) is an optical fiber or a combination of an objective lens and an optical fiber.

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