Stone plugging device

Abstract

The utility model belongs to the technical field of calculus plugging equipment, and particularly relates to a calculus plugging device. According to the technology, a first guide pipe is vertically arranged, and the first guide pipe is independently sleeved with a second guide pipe; the upper end of the second catheter is hermetically connected to the outer side wall of the first catheter, a balloon communicated with the second catheter is arranged at the lower end of the second catheter, and one end of the balloon is hermetically connected to the first catheter; a third catheter is sleeved on the second catheter above the balloon; a baffle ring for shielding and protecting the balloon is arranged on the third catheter, the baffle ring is made of an elastic material, the baffle ring is horizontally arranged in a natural state, and the diameter of the expanded balloon is smaller than that of the baffle ring; an annular groove is formed in the bottom of the third guide pipe, and a traction assembly used for pulling the baffle ring into the annular groove is arranged on the third guide pipe. According to the utility model, the production cost is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of stone blocking equipment, in particular to a stone blocking device. Background Art

[0002] When treating ureteral stones during urological surgery, an occluder is used. During the operation, the occluder can effectively prevent stones or stone fragments from being washed back into the kidneys, thereby improving the success rate and safety of the operation.

[0003] Most of the occluders currently available in the art include a balloon and a catheter connected to the balloon. When in use, a guide wire and a ureteroscope are first inserted into the ureter. The catheter and balloon are then implanted into the ureter along the guide wire. During the process of pushing the balloon into the ureter, the gap between the stone and the ureteral cavity is observed through the ureteroscope, and the balloon is pushed close to the gap in the ureteral wall, so that the balloon passes over the stone and is finally located at the junction of the ureter and the renal pelvis. The balloon is then inflated, and the ureter can be blocked after the balloon expands. A holmium laser is then used with appropriate energy to crush the stone until the stone is completely crushed into fragments of smaller diameter. During the crushing process, the stone is prevented from entering the kidney from the ureter because the balloon expands and is in a blocking state. After the stone is crushed, the ureteroscope and balloon are slowly withdrawn. During the withdrawal process, the balloon can drag the stone fragments out of the ureteral opening to the bladder.

[0004] During this use process, through the balloon expansion design, when crushing stones, the balloon can block the flying stones and prevent the broken stones from entering the kidneys. However, after the balloon is expanded, the flying stones will splash onto the balloon multiple times, which will also cause damage to the balloon, thereby reducing the service life of the balloon and increasing the cost of use. Utility Model Content

[0005] The purpose of the utility model is to provide a stone occluder to solve the problem of increased production costs.

[0006] The stone occluder includes a vertically arranged first catheter, on which a second catheter is independently sleeved; the upper end of the second catheter is sealedly connected to the outer wall of the first catheter, and the lower end of the second catheter is provided with a balloon connected to it, one end of the balloon is sealedly connected to the first catheter; a third catheter is sleeved on the second catheter above the balloon; the third catheter is provided with a baffle ring for shielding and protecting the balloon, the baffle ring is made of elastic material, and in its natural state, the baffle ring is horizontally arranged and the diameter of the balloon after expansion is smaller than the diameter of the baffle ring; an annular groove is provided at the bottom of the third catheter, and a pulling component for pulling the baffle ring into the annular groove is provided on the third catheter.

[0007] Furthermore, the pulling assembly includes a connecting ring, the outer wall of the connecting ring is fixed on the inner wall of the retaining ring, and the connecting ring is located in the annular groove; a through hole communicating with the interior of the annular groove is opened on the top of the third catheter, and a pull rod is arranged in the through hole, the lower end of the pull rod is fixed on the connecting ring, and the upper end thereof passes through the through hole and is located above the third catheter.

[0008] Furthermore, a handle is fixed to the upper end of the pull rod.

[0009] Furthermore, a first nozzle is provided on the top of the first conduit.

[0010] Furthermore, a through groove communicating with the inside and outside of the second conduit is formed on the top of the second conduit, and an air inlet pipe for connecting to the air pump is provided in the through groove.

[0011] Furthermore, a second nozzle is provided at the air inlet end of the air inlet pipe.

[0012] Furthermore, the balloon is made of polyurethane material.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The utility model provides a retaining ring on the third catheter on one side of the balloon. During the process of crushing stones, the retaining ring can replace the balloon in contact with the crushed stones, thereby preventing the flying stones from directly splashing onto the balloon, achieving the purpose of protecting the balloon, and avoiding the problem of increased production costs due to easy damage of the balloon, thereby saving production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model;

[0016] Figure 2 for Figure 1 A in the middle is an enlarged structural diagram;

[0017] Figure 3 This is a state diagram for the use of the utility model;

[0018] Figure 4 for Figure 1 Main view structure diagram;

[0019] The names of the components in the figure are: 1. First catheter; 2. Second catheter; 3. Handle; 4. Pull rod; 5. Third catheter; 6. Retaining ring; 7. Guide wire; 8. Balloon; 9. Second nozzle; 10. Air inlet pipe; 11. First nozzle; 12. Connecting ring. DETAILED DESCRIPTION

[0020] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings, but this does not limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0021] Example

[0022] The stone occluder described in this embodiment is as follows Figure 1 As shown, the first catheter 1 is vertically arranged, and the first catheter 1 is used to pass a guide wire 7. During the stone surgery, the guide wire 7 is first inserted into the ureter, and then the first catheter 1 enters the ureter along the outside of the guide wire 7, so that the guide wire 7 guides the first catheter 1. During the production process, the first catheter 1 can be made of polymer materials such as polyurethane, nylon, polyethylene, and polyvinyl chloride.

[0023] like Figure 1 As shown, the first conduit 1 is independently covered with a second conduit 2; the upper end of the second conduit 2 is sealedly connected to the outer wall of the first conduit 1, so that the top of the second conduit 2 is fixed to the outer wall of the first conduit 1 all around. Because the upper end of the second conduit 2 is fixed to the first conduit 1, the tube body of the second conduit 2 is in a movable state; during the production process, the second conduit 2 can be made of polymer materials such as polyurethane, nylon, polyethylene, and polyvinyl chloride;

[0024] like Figure 1 The lower end of the second catheter 2 is provided with a balloon 8 connected thereto, and one end of the balloon 8 is sealedly connected to the first catheter 1;

[0025] The balloon 8 is an elliptical structure, with openings at both the upper and lower ends of the balloon 8. The opening at the upper end of the balloon 8 is fixed to a periphery of the bottom of the second catheter 2, and the opening at the lower end of the balloon 8 is fixed to the outer wall of the first catheter 1. Therefore, through the above connection method, when the second catheter 2 is inflated, the balloon 8 can be expanded, and when the gas in the second catheter 2 is deflated, the balloon 8 is deflated. During use, when the first catheter 1 enters the ureter along the guide wire 7, the balloon 8 and the second catheter 2 can also be driven into the ureter.

[0026] The balloon 8 is made of polyurethane material, which mainly has a thermoplastic linear structure and has better stability and resilience.

[0027] like Figure 1 、 Figure 2 and Figure 4As shown, a third catheter 5 is mounted on the second catheter 2 above the balloon 8; the inner wall of the third catheter 5 is fixed to the outer wall of the second catheter 2; during the production process, the third catheter 5 can be made of a polymer material such as polyurethane, nylon, polyethylene, polyvinyl chloride, etc.

[0028] like Figure 1 、 Figure 2 and Figure 3 As shown, the third catheter 5 is provided with a baffle 6 for shielding and protecting the balloon 8. The baffle 6 is made of elastic material. In its natural state, the baffle 6 is arranged horizontally and the diameter of the balloon 8 after expansion is smaller than the diameter of the baffle 6. When there is a stone in the ureter and the stone needs to be broken up by laser, the balloon 8 can be implanted into the ureter through the guide wire 7. When the balloon 8 encounters the stone, the balloon 8 is pushed close to the gap in the ureteral wall, so that the balloon 8 passes over the stone and reaches the ureter on the other side of the stone. Finally, the balloon 8 is located at the junction of the ureter and the renal pelvis. At this time, the balloon 8 can block the passage between the ureter and the kidney. When the balloon 8 moves to the junction of the ureter and the renal pelvis, Because the third catheter 5 is provided with a baffle ring 6, the baffle ring 6 can also move with the balloon 8 to the junction of the ureter and the renal pelvis. When the baffle ring 6 moves, the baffle ring 6 will be close to the stone, replacing the balloon 8 in contact with the stone. Later, when the holmium laser is used to crush the stone, part of the stone will fly during the stone crushing process. Because the diameter of the baffle ring 6 is larger than the diameter of the balloon 8 after expansion, the flying stone can be blocked by the baffle ring 6. Therefore, through the design of the baffle ring 6, the baffle ring 6 can replace the balloon 8 in contact with the flying stone, thereby avoiding direct contact between the stone and the balloon 8, achieving the purpose of protecting the balloon 8, and thus saving production costs. During the production process, the baffle ring 6 can be made of silicone or rubber.

[0029] like Figure 1 and Figure 2 As shown, an annular groove is provided at the bottom of the third conduit 5. Since the third conduit 5 is a tubular structure, an annular groove is provided around the bottom of the third conduit 5.

[0030] like Figure 1 and Figure 2As shown, a connecting ring 12 is provided on the third conduit 5, and the outer wall of the connecting ring 12 is fixed on the inner wall of the retaining ring 6, and the connecting ring 12 is located in the annular groove; a through hole communicating with the inside of the annular groove is opened on the top of the third conduit 5, and a pull rod 4 is provided in the through hole, and the lower end of the pull rod 4 is fixed on the connecting ring 12, and the upper end thereof passes through the through hole and is located above the third conduit 5; this section of the scheme as a whole constitutes a pulling assembly for pulling the retaining ring 6 into the annular groove; the through hole is connected from top to bottom, because the lower end of the pull rod 4 is fixed on the connecting ring 12, When the upper end of the pull rod 4 is pulled upward, the connecting ring 12 can be driven to move upward, because the connecting ring 12 is fixed on the retaining ring 6, thereby driving the retaining ring 6 to move upward, and because the connecting ring 12 is located in the annular groove, the retaining ring 6 can be pulled into the annular groove; when the upper end of the pull rod 4 is pulled downward, the connecting ring 12 can be driven to move downward, because the connecting ring 12 is fixed on the retaining ring 6, thereby driving the retaining ring 6 to move downward, so the retaining ring 6 can be moved out of the annular groove during the downward movement, that is, Figure 3 In the orientation; during use, when the balloon 8 moves into the ureter, the retaining ring 6 can be received in the limiting groove, and then when the balloon 8 moves to the appropriate position, the pull rod 4 is pulled to drive the retaining ring 6 to move out of the limiting groove; the design of receiving the retaining ring 6 in the limiting groove facilitates the smooth movement of the retaining ring 6 into the ureter; during the production process, the connecting ring 12 can be made of silicone or rubber; during the production process, the pull rod 4 can be made of stainless steel or titanium alloy; stainless steel or titanium alloy has a certain elasticity and hardness, so the connecting ring 12 and the retaining ring 6 are pushed as smoothly as possible to move;

[0031] In a specific implementation process, there can be two pull rods 4 in the pulling assembly, so a through hole is opened corresponding to each pull rod 4, and the two pull rods 4 are symmetrically installed, and their bottoms are fixed on the connecting ring 12. Through the design of the two pull rods 4, the process of pushing and pulling the connecting ring 12 and the retaining ring 6 up and down can be smoother and easier;

[0032] like Figure 1 As shown, a handle 3 is fixed to the upper end of the pull rod 4. The design of the handle 3 makes it easier to operate the pull rod 4 to move up and down, thereby making it easier to drive the connecting ring 12 and the retaining ring 6 to move up and down;

[0033] like Figure 1 As shown, a first nozzle 11 is provided at the top of the first catheter 1. The first nozzle 11 is a funnel-shaped structure. Therefore, the design of the first nozzle 11 facilitates the removal of the guide wire 7 from the first catheter 1.

[0034] like Figure 1As shown, a through groove communicating with the inside and outside is provided at the top of the second conduit 2, and an air inlet pipe 10 for connecting to the air pump is provided in the through groove; the through groove is preferably provided at the top of the second conduit 2; when the air inlet pipe 10 is specifically installed, the outer wall of one end of the air inlet pipe 10 is fixed to the groove wall of the through groove. Through the design of the air inlet pipe 10, the air inlet pipe 10 is connected to the air pump, and the gas can inflate the second conduit 2. When the gas moves into the balloon 8 at the bottom of the second conduit 2, it is convenient to inflate the balloon 8. Later, when the air pump is deflated, the gas in the second conduit 2 can be driven back, thereby achieving the purpose of deflation of the balloon 8.

[0035] like Figure 1 As shown, the air inlet end of the air inlet pipe 10 is provided with a second nozzle 9, which is a funnel-shaped structure. Therefore, the design of the second nozzle 9 facilitates connection with the air pump.

[0036] Further preferably, the first conduit 1, the first nozzle 11, the second conduit 2, the third conduit 5, the balloon 8, the second nozzle 9 and the air inlet pipe 10 can be produced by an integrated molding technology during the production process. The integrated molding method can increase the sealing between the components, thereby increasing safety during use;

[0037] In the specific use process: first, the patient is given general anesthesia or spinal anesthesia, and then a ureteroscope is used to enter the bladder through the urethra, and the ureteral opening is found along the interureteral crest. A guide wire 7 is inserted near the opening. After the ureteroscope and the guide wire 7 are implanted into the ureter, the ureteroscope can find the location of the stone, and then the first catheter 1 is operated to be sheathed on the outside of the guide wire 7. Then, the first catheter 1 can be implanted into the ureter along the guide wire 7. Because the second catheter 2, the third catheter 5, the retaining ring 6 and the balloon 8 are all located on the first catheter 1, the second catheter can be inserted into the ureter. 2. The third catheter 5, the retaining ring 6 and the balloon 8 are implanted into the ureter; at this time, the retaining ring 6 is housed in the annular groove; then, under a ureteroscope, the implanted positions of the balloon 8 and the retaining ring 6 can be observed. When the balloon 8 and the retaining ring 6 encounter a stone, the balloon 8 is pushed close to the gap in the ureteral wall, so that the balloon 8 and the retaining ring 6 pass over the stone and into the ureter on the other side of the stone, thereby positioning the balloon 8 and the retaining ring 6 at the junction of the ureter and the renal pelvis. The second nozzle 9 is then connected to the air pump, and the gas can enter the balloon 8 through the air inlet pipe 10 and the second catheter 2. The purpose of inflating the balloon 8 is achieved. When the balloon 8 is expanded, the passage between the ureter and the kidney can be blocked. At this time, the operating rod 4 drives the connecting ring 12 to move toward the notch of the annular groove, thereby driving the retaining ring 6 on the connecting ring 12 to move. The retaining ring 6 can move out of the annular groove during the movement. This is because the retaining ring 6 can rebound through its elasticity and contact the ureter. After that, the holmium laser is used to crush the stones. During the stone crushing process, some stones will splash because the diameter of the retaining ring 6 is larger than the diameter of the balloon 8 after expansion. The stones can be blocked by the retaining ring 6, avoiding the flying broken stones from directly contacting the balloon 8; finally, the ureteroscope, guide wire 7, retaining ring 6 and balloon 8 are withdrawn from the ureter in turn. During the withdrawal process, the retaining ring 6 will contact the wall of the ureter, so the broken stones can be taken out of the ureter by the way; therefore, in this use process, the stones are avoided from directly contacting the balloon 8, which plays the purpose of protecting the balloon 8 and avoids the balloon 8 from being easily damaged as much as possible, thereby solving the problem of the balloon 8 being easily damaged and requiring replacement, saving production costs.

Claims

1. A stone occluder, comprising a first catheter (1) arranged vertically, characterized in that: The first catheter (1) is independently sleeved with a second catheter (2); the upper end of the second catheter (2) is sealedly connected to the outer side wall of the first catheter (1), and the lower end of the second catheter (2) is provided with a balloon (8) connected to the first catheter (1), and one end of the balloon (8) is sealedly connected to the first catheter (1); a third catheter (5) is sleeved on the second catheter (2) above the balloon (8); a retaining ring (6) is provided on the third catheter (5) for shielding and protecting the balloon (8), and the retaining ring (6) is made of elastic material. In its natural state, the retaining ring (6) is horizontally arranged, and the diameter of the balloon (8) after expansion is smaller than the diameter of the retaining ring (6); an annular groove is provided at the bottom of the third catheter (5), and a pulling component for pulling the retaining ring (6) into the annular groove is provided on the third catheter (5).

2. The stone occluder according to claim 1, characterized in that: The pulling assembly includes a connecting ring (12), the outer wall of the connecting ring (12) is fixed on the inner wall of the retaining ring (6), and the connecting ring (12) is located in the annular groove; the top of the third conduit (5) is provided with a through hole communicating with the inside of the annular groove, and a pull rod (4) is arranged in the through hole, the lower end of the pull rod (4) is fixed on the connecting ring (12), and the upper end thereof passes through the through hole and is located above the third conduit (5).

3. The stone occluder according to claim 2, characterized in that: A handle (3) is fixed to the upper end of the pull rod (4).

4. The stone occluder according to claim 1, characterized in that: A first nozzle (11) is provided at the top of the first conduit (1).

5. The stone occluder according to claim 1, characterized in that: A through groove communicating with the inside and outside is provided on the top of the second conduit (2), and an air inlet pipe (10) for connecting to an air pump is provided in the through groove.

6. The stone occluder according to claim 5, characterized in that: The air inlet end of the air inlet pipe (10) is provided with a second nozzle (9).

7. The stone occluder according to claim 1, characterized in that: The balloon (8) is made of polyurethane material.

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