Urinary plugging calculus removal catheter capable of achieving negative pressure suction

Abstract

The utility model relates to the technical field of medical instruments, in particular to a urinary plugging calculus removal catheter capable of achieving negative pressure suction, which comprises a catheter body, one end of the catheter body is a plugging part, the other end of the catheter body is connected with a negative pressure device, the plugging part is configured to be switched between an opening state and a containing state, and when the plugging part is in the opening state, the negative pressure device is connected with the negative pressure device. The plugging part is bent to form a spiral plugging structure, and a plurality of suction openings used for sucking broken stones under the negative pressure effect of the negative pressure device are formed in the plugging part. According to the utility model, the plugging part and the suction port on the plugging part are utilized to integrate the functions of plugging, calculus removal and the like, so that the times of taking out and entering a human body cavity caused by insufficient endoscope cavities are reduced, the injury of the instrument to the human body cavity is reduced, the pain of a patient is reduced, and the working efficiency is improved. In addition, the broken stones are sucked through negative pressure, so that the problem that a mesh basket is loose when a traditional mesh basket is pulled during stone removal can be avoided, and stone removal is more thorough.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a urinary tract stone removal catheter capable of negative pressure suction. Background Art

[0002] Urinary tract stone removal catheters are used to endoscopically capture and remove stones and other foreign bodies in the urinary system. However, the mainstream urinary tract stone removal catheters currently in use have the following defects due to their structural limitations:

[0003] 1. During the lithotripsy process, normal saline flushing is required. The water flow may indirectly loosen the stone removal catheter, resulting in incomplete occlusion.

[0004] 2. During the process of extracting the stone removal instrument, the pulling force will loosen the blocked stone removal catheter, allowing smaller stones to escape from the gap in the catheter, resulting in incomplete stone removal. Utility Model Content

[0005] The technical problem to be solved by the present invention is: in order to solve the problem that the stone removal net catheter in the prior art is incompletely blocked and becomes loose under the action of pulling force, thereby allowing smaller-volume gravel to escape from the gaps in the catheter, resulting in incomplete stone removal, a urinary stone removal catheter with negative pressure suction is provided.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: a urinary stone removal catheter capable of negative pressure suction, comprising a catheter body, one end of which is a blocking portion, and the other end of which is connected to a negative pressure device, wherein the blocking portion is configured to be switchable between an open state and a retracted state;

[0007] When the blocking portion is in the open state, the blocking portion bends to form a spiral blocking structure, and a plurality of suction ports are provided on the blocking portion for sucking up gravel under the negative pressure of the negative pressure device; when the blocking portion is deformed to the open state, it blocks the urethra to intercept the gravel, and the suction ports suck the gravel into the interior of the catheter body and then discharge it out of the body.

[0008] Furthermore, an outer tube is provided on the outside of the catheter body, and the blocking part can extend out of the outer tube or be retracted into the outer tube to realize the switching of the blocking part between an open state and a retracted state. When the blocking part is in the retracted state, its shape is adapted to the inner cavity of the outer tube so that it can be accommodated in the inner cavity of the outer tube.

[0009] Furthermore, the front end of the blocking portion has a limiting tube that protrudes in the radial direction to abut against the outer tube to limit the storage state of the blocking portion.

[0010] Furthermore, the blocking portion in the open state is in a variable diameter spiral structure having a plurality of turns, each of which is provided with a plurality of the above-mentioned suction ports on the inner side, and the plurality of suction ports are distributed at intervals along the circumference of the blocking portion.

[0011] Furthermore, a hydrophilic guide head is provided at the front end of the limiting tube, and a hydrophilic coating is coated on the guide head.

[0012] Furthermore, the exterior of the catheter body is coated with a coating layer, and the coating layer is made of PTFE.

[0013] Furthermore, the catheter body is made of memory alloy, which has elastic deformation ability and memory function. After it is put into the outer tube, it can be stretched to form a straight tube that matches the inner cavity of the outer tube, and can be restored to a spiral shape after it is extended out of the outer tube.

[0014] The beneficial effects of the present invention are as follows: the present invention utilizes the blocking part and the suction port thereon to integrate the functions of blocking and stone removal, thereby reducing the number of times the instrument is taken out and enters the human body's cavity due to insufficient number of endoscope cavities, reducing the damage of the instrument to the human body's cavity, and reducing the pain of the patient. In addition, the negative pressure suction of the gravel can avoid the problem of loose net basket caused by pulling during stone removal by the traditional net basket, making the stone removal more thorough. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 It is a structural schematic diagram of the utility model in an open state;

[0017] Figure 2 It is a structural schematic diagram of the utility model in the storage state;

[0018] Figure 3 It is a schematic diagram of the structure of the catheter body;

[0019] In the picture:

[0020] 1. Catheter body; 101. Blocking portion; 1011. Suction port;

[0021] 2. External control;

[0022] 3. Limiting tube;

[0023] 4. Hydrophilic seeker;

[0024] 5. Negative pressure device. DETAILED DESCRIPTION

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams that illustrate the basic structure of the present invention only in a schematic manner. Therefore, they only show components relevant to the present invention, and directions and references (e.g., up, down, left, right, etc.) may be used solely to facilitate the description of features in the drawings. The following detailed description is therefore not to be taken in a limiting sense, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0026] like Figure 1-Figure 3 As shown, a urinary stone removal catheter capable of negative pressure suction includes a catheter body 1, one end of the catheter body 1 is a blocking portion 101, and the other end is connected to a negative pressure device 5, wherein the blocking portion 101 is configured to be switchable between an open state and a retracted state;

[0027] When the blocking portion 101 is in the open state, the blocking portion 101 bends to form a spiral blocking structure to block the urinary tract. When it is in the retracted state, the blocking portion 101 is stretched to form a straight shape that can enter and exit the urethra, and the blocking portion 101 is provided with a plurality of suction ports 1011 for sucking gravel under the negative pressure of the negative pressure device 5.

[0028] During use, the stone removal catheter in the storage state is first sent to the urinary tract stone through the endoscope, and the blocking part 101 is made to reach the front of the stone. Then the blocking part 101 is opened, and the blocking part 101 blocks the urinary tract to prevent the stone from moving forward. Then the negative pressure device 5 is started to form a negative pressure environment inside the catheter body 1. The broken stones enter the catheter body 1 from the suction port 1011 and finally enter the collection bottle. Compared with the traditional net basket that drags the stones out of the human body, the present application can avoid the problem of the net basket loosening caused by pulling the net basket, making the stone removal more thorough.

[0029] In some examples, the outer tube 2 is provided on the outside of the catheter body 1. Driven by a handle device (not shown in the figure), the catheter body 1 can slide relative to the outer tube 2 to allow the blocking portion 101 to extend out of the outer tube 2 or be retracted into the outer tube 2, thereby switching the blocking portion 101 between an open state and a retracted state; in the initial state, the handle device drives the blocking portion 101 to be retracted into the outer tube 2 to be in a retracted state. At this time, the blocking portion 101 is a straight tube, which matches the inner shape of the outer tube 2. Therefore, the stone removal catheter can enter and exit the human body through an endoscope without causing significant damage to the human body. After it reaches the stone location, the handle device drives the blocking portion 101 to extend out of the outer tube 2 and switch to an open state to block the urinary tract and absorb the stone.

[0030] In some examples, the front end of the sealing portion 101 has a limiting tube 3 that protrudes radially to abut against the outer tube 2 to limit the storage state of the sealing portion 101, that is, the outer diameter of the limiting tube 3 is larger than the inner diameter of the outer tube 2, and the limiting tube 3 and the catheter body 1 are matched by but not limited to gluing or riveting processes. When the handle device drives the sealing portion 101 to be retracted into the outer tube 2, when the limiting tube 3 abuts against the outer tube 2, the operator can be reminded that the storage is completed at this time.

[0031] In some examples, the blocking portion 101 in the open state has a variable diameter spiral structure, whose outer shape is roughly conical and whose maximum size matches the size of the urethra to block the urethra. The blocking portion 101 has several circles, and each circle has several suction ports 1011 on the inner side. The suction ports 1011 are distributed at intervals along the circumference of the blocking portion 101. The multiple suction ports 1011 distributed in multiple directions make stone removal more thorough, greatly reduce the risk of lithotripsy, and improve the success rate of the operation.

[0032] In some examples, a hydrophilic guide head 4 is provided at the front end of the limiting tube 3, and the head thereof is a spherical structure. The hydrophilic guide head 4 is coated with a hydrophilic coating. After the hydrophilic coating is activated, it is more convenient for the instrument to enter the urinary tract. The head of the spherical structure can play a guiding role to reduce damage to the human cavity and alleviate the patient's discomfort.

[0033] In some examples, the outside of the catheter body 1 is covered with a coating layer, and the coating layer is made of PTFE. The coating layer can reduce the friction between the catheter body 1 and the outer tube 2, facilitate the switching of the sealing part 101 between the open state and the retracted state, and can also significantly reduce the friction on the human organs and reduce damage to the human body.

[0034] In some examples, the catheter body 1 is made of a memory alloy, which may be but is not limited to nickel-titanium alloy, etc., and has elastic deformation ability and memory function. During the process of the sealing part 101 being retracted into the outer tube 2, it can be stretched into a straight shape under the pulling force of the handle device and the pressure of the outer tube 2, and then can enter the outer tube 2 for storage.

[0035] Working principle;

[0036] like Figure 2 As shown, in the initial state, the handle device pulls the blocking portion 101 back into the outer tube 2 to form a retracted state. At this time, the blocking portion 101 is in a straight tubular shape. The stone removal catheter can enter the human body through an endoscope. After it reaches the stone position, the handle device drives the blocking portion 101 to extend out of the outer tube 2 and switch to an open state to block the urinary tract to prevent the stone from moving forward. Figure 1As shown, the negative pressure device 5 is then started to form a negative pressure environment inside the catheter body 1, and the gravel enters the catheter body 1 from the suction port 1011 and finally enters the collection bottle. After the stone removal is completed, the handle device pulls the sealing part 101 back into the outer tube 2 to form a storage state to facilitate withdrawal from the human body.

[0037] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A urinary tract stone removal catheter capable of negative pressure suction, characterized by: The invention comprises a catheter body (1), one end of the catheter body (1) is a blocking portion (101), and the other end is connected to a negative pressure device (5), and the blocking portion (101) is configured to be switchable between an open state and a retracted state; When the blocking portion (101) is in an open state, the blocking portion (101) bends to form a spiral blocking structure, and a plurality of suction ports (1011) for sucking gravel under the negative pressure of the negative pressure device (5) are provided on the blocking portion (101).

2. The urinary tract stone removal catheter capable of negative pressure suction according to claim 1, characterized in that: The catheter body (1) is sheathed with an outer tube (2), and the blocking portion (101) can extend from the outer tube (2) or be retracted into the outer tube (2) to achieve switching of the blocking portion (101) between an open state and a retracted state.

3. The urinary tract stone removal catheter capable of negative pressure suction according to claim 2, characterized in that: The front end of the blocking portion (101) has a limiting tube (3) that protrudes in the radial direction to abut against the outer tube (2) to limit the storage state of the blocking portion (101).

4. The urinary tract stone removal catheter capable of negative pressure suction according to claim 1, characterized in that: The blocking portion (101) in the open state is a variable diameter spiral structure having a plurality of turns, each of which is provided with a plurality of suction ports (1011) on the inner side, and the plurality of suction ports (1011) are distributed at intervals along the circumference of the blocking portion (101).

5. The urinary tract stone removal catheter capable of negative pressure suction according to claim 3, characterized in that: A hydrophilic guide head (4) is provided at the front end of the position limiting tube (3).

6. The urinary tract stone removal catheter capable of negative pressure suction according to claim 1, characterized in that: The catheter body (1) is externally coated with a coating layer, and the coating layer is made of PTFE.

7. The urinary tract stone removal catheter capable of negative pressure suction according to claim 1, characterized in that: The catheter body (1) is made of memory alloy.

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