Calculus removal mesh basket assembly convenient for expanding nipple opening

Abstract

The utility model relates to the technical field of ERCP operations, and discloses a calculus removing mesh basket assembly facilitating opening of a nipple opening. Comprising a beam tube, a movable lead screw, a mesh basket body, a fixed handle and a movable handle, wherein the movable lead screw is located in the beam tube, and the two ends of the movable lead screw penetrate out of the beam tube; the mesh basket body is arranged at the end of the movable lead screw; the fixed handle is arranged at the end, away from the mesh basket body, of the beam tube; a guide pipe extending in the beam tube direction is arranged on the outer wall of the beam tube, a hollow guide wire with the two ends penetrating out of the guide pipe is arranged in the guide pipe, a bent part used for being embedded into a nipple opening is integrally arranged at the end, close to the mesh basket body, of the hollow guide wire, and air bags used for expanding the nipple opening are arranged on the two sides of the bent part. An inflation nozzle used for being externally connected with inflation equipment is arranged at the end, away from the bent part, of the hollow guide wire, and when the two air bags are in an inflation state, the two air bags are in a V shape in the nipple opening, and a gap allowing the net basket body to penetrate through is formed in the middle of the two air bags.

Description

Technical Field

[0001] The utility model belongs to the technical field of ERCP surgery, and particularly relates to a stone removal basket component which is convenient for expanding the nipple opening. Background Art

[0002] Endoscopic retrograde cholangiopancreatography (ERCP) is a method of inserting an endoscope into the descending duodenum to find the papilla of the pancreaticobiliary duct opening, then inserting a contrast catheter through the biopsy hole and injecting iodine contrast agent for X-ray examination.

[0003] Endoscopic (retrograde) cholangiopancreatography is mainly performed through a duodenoscope. Conventional endoscopes have the lens on the front side, while this operation is a side-view endoscope with the lens on the left side. During endoscopic cholangiopancreatography, a papillary incision knife is used to superselect the common bile duct. That is, the knife is inserted into the common bile duct through the duodenal papilla. Because this process is performed under X-rays, the direction of the guide wire in the common bile duct can be determined by X-rays, and then the incision knife or angiography catheter is inserted to create contrast agent. The nature of the disease can be determined through the display process, such as stones, tumor lesions, or compression by pancreatic head cancer. With the advancement of examination equipment, such as magnetic resonance imaging (MRCP), the same role can be played in magnetic resonance imaging of the bile and pancreatic duct. In addition to diagnosis, endoscopic cholangiopancreatography can also treat diseases. If there are stones in the common bile duct, this method can be used to determine the location and number of stones, and then use a stone removal basket or stone removal balloon to remove the stones from the common bile duct and discharge them into the intestine.

[0004] At present, a Chinese patent with publication number CN217430105U and publication date September 16, 2022 discloses an efficient stone removal basket, including a bundle tube and an operating rod movably arranged inside the bundle tube. A stone removal basket is provided at one end of the operating rod, and a stone removal filter is provided at the head end of the stone removal basket. The stone removal filter is hollow cylindrical and can be retracted to be accommodated in the bundle tube. The maximum aperture of the side wall mesh is less than 2 mm.

[0005] When in use, by pulling the end of the operating rod, the stone-taking basket at the other end of the operating rod can be retracted, and the retractable stone-taking basket can now grab the stone.

[0006] During endoscopic retrograde cholangiopancreatography, the stone removal basket can be inserted into the duodenal papilla to remove stones in the common bile duct into the duodenum, allowing the stones to be discharged from the intestine to the body. However, in actual surgery, the papilla of some patients is very narrow, so it is very inconvenient for the stone removal basket to enter and exit the papilla, especially when entering the papilla, the stone removal basket often cannot find the correct position of the papilla. Utility Model Content

[0007] The utility model aims to provide a stone removal net basket component which is convenient for expanding the nipple opening and can expand the narrow nipple opening, thereby facilitating the entry and exit of the net basket body.

[0008] The above-mentioned technical purpose of the utility model is achieved through the following technical solutions: a stone removal net basket assembly that is convenient for expanding the nipple opening, comprising a bundle tube, a movable screw rod located in the bundle tube and passing through the bundle tube at both ends, a net basket body arranged at the end of the movable screw rod, a fixed handle arranged at one end of the bundle tube away from the net basket body, and a movable handle arranged at one end of the fixed handle away from the bundle tube and connected to the movable screw rod, wherein the outer wall of the bundle tube is provided with a guide tube extending along the bundle tube direction, the guide tube is provided with a hollow guide wire with both ends passing through the guide tube, the hollow guide wire is integrally provided with a bending portion for being embedded in the nipple opening at one end close to the net basket body, air bags for expanding the nipple opening are provided on both sides of the bending portion, and an inflation nozzle for an external inflation device is provided at the end of the hollow guide wire away from the bending portion. When the two air bags are in an inflated state, the two air bags are V-shaped in the nipple opening and a gap is formed in the middle for the net basket body to pass through.

[0009] In summary, the present invention has the following beneficial effects:

[0010] 1. When using the basket body for stone removal, first insert the hollow guide wire into the nipple opening, with the bent portion of the hollow guide wire entering the nipple opening first. At this time, the external inflation device can be connected to the inflation nozzle. After the inflation nozzle is inflated into the hollow guide wire, the airbags on both sides of the bent portion will begin to inflate. At this time, the two airbags will form a V shape in the nipple opening, and a gap will be formed in the middle for the basket body to pass through.

[0011] Since the bent portion is pressed against the inner wall of the nipple opening through the airbag, the bent portion is locked at the nipple opening. As the hollow guide wire continues to penetrate into the nipple opening, the subsequent hollow guide wire can pass over the bent portion and enter the common bile duct; then the bundle tube can be moved along the hollow guide wire through the guide tube. At this time, the hollow guide wire can guide the bundle tube, and the basket body can quickly enter the common bile duct after passing through the gap between the two airbags. When the basket body returns to the nipple opening with the stone, the basket body can quickly pass through the gap between the two airbags and pass out of the nipple opening, thereby finally expanding the narrow nipple opening, thereby facilitating the entry and exit of the basket body. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 yes Figure 1 Enlarged view of part A in the middle;

[0015] Figure 3 This is a schematic diagram of the structure of the utility model when it is combined with the nipple opening, at which time the air bag is in an inflated state;

[0016] Figure 4 It is a planar cross-sectional view of the structure between the hollow guide wire, the air bag and the nipple opening in the utility model.

[0017] In the figure, 1. bundle tube; 11. fixed handle; 12. guide tube; 2. movable screw rod; 21. basket body; 22. movable handle; 3. hollow guide wire; 31. bending part; 311. air bag; 32. inflation nozzle; 4. nipple opening. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments are described clearly and completely below. Obviously, the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0019] A stone removal basket assembly for expanding the nipple opening, referring to Figure 1 、 Figure 2 This stone removal basket assembly that is convenient for expanding the nipple opening includes a bundle tube 1, a movable screw rod 2, a basket body 21, a fixed handle 11, and a movable handle 22, wherein the movable screw rod 2 extends into the bundle tube 1 and passes through the bundle tube 1 at both ends, and the basket body 21 is connected to one end of the movable screw rod 2, and the basket body 21 is contracted by the movable screw rod 2 at the end of the bundle tube 1; at the same time, the fixed handle 11 is fixed at the end of the bundle tube 1 away from the basket body 21, and the movable handle 22 is arranged on the fixed handle 11 and fixedly connected to the end of the movable screw rod 2 away from the basket body 21, and the movable screw rod 2 in the bundle tube 1 can be driven to contract by pulling the movable handle 22.

[0020] Reference Figure 1 、 Figure 3 、 Figure 4A guide tube 12 extending along the direction of the bundle tube 1 is integrally provided on the outer wall of the bundle tube 1, and a hollow guide wire 3 with both ends passing through the guide tube 12 is provided in the guide tube 12. The interior of the hollow guide wire 3 is hollow, and a bending portion 31 for embedding in the nipple opening 4 is integrally provided at one end of the hollow guide wire 3 close to the basket body 21, and air bags 311 are bonded on both sides of the bending portion 31, which are communicated with the interior of the hollow guide wire 3 and used to expand the nipple opening 4. At the same time, an inflation nozzle 32 for an external inflation device is provided at the end of the hollow guide wire 3 away from the bending portion 31. The inflation device can be a medical air pump. When the two air bags 311 are in an inflated state, the two air bags 311 are V-shaped in the nipple opening 4 and a gap is formed in the middle for the basket body 21 to pass through.

[0021] Principle: When using the basket body 21 for stone removal, the hollow guide wire 3 is first inserted into the nipple opening 4, wherein the bent portion 31 of the hollow guide wire 3 first enters the nipple opening 4. At this time, the inflation nozzle 32 can be connected through the external inflation device. After the inflation nozzle 32 is inflated toward the hollow guide wire 3, the air bags 311 on both sides of the bent portion 31 can begin to swell. At this time, the two air bags 311 can form a V shape in the nipple opening 4, and a gap is formed in the middle for the basket body 21 to pass through.

[0022] Since the bent portion 31 is pressed against the inner wall of the nipple opening 4 through the airbag 311, the bent portion 31 is locked at the nipple opening 4. As the hollow guide wire 3 continues to penetrate into the nipple opening 4, the subsequent hollow guide wire 3 can pass over the bent portion 31 and enter the common bile duct; then the bundle tube 1 can move along the hollow guide wire 3 through the guide tube 12. At this time, the hollow guide wire 3 can guide the bundle tube 1, and the basket body 21 can quickly find the nipple opening position and enter the common bile duct by passing through the gap between the two airbags 311. When the basket body 21 returns to the nipple opening 4 with the stone, the basket body 21 can pass through the gap between the two airbags 311 and quickly pass out of the nipple opening 4, and finally the narrow nipple opening 4 can be expanded, thereby facilitating the entry and exit of the basket body 21.

Claims

1. A stone removal basket assembly for facilitating the expansion of the nipple opening, comprising a bundle tube (1), a movable screw rod (2) located in the bundle tube (1) and extending through the bundle tube (1) at both ends, a basket body (21) arranged at the end of the movable screw rod (2), a fixed handle (11) arranged at one end of the bundle tube (1) away from the basket body (21), and a movable handle (22) arranged at one end of the fixed handle (11) away from the bundle tube (1) and connected to the movable screw rod (2), characterized in that: A guide tube (12) extending in the direction of the bundle tube (1) is provided on the outer wall of the bundle tube (1), and a hollow guide wire (3) with both ends passing through the guide tube (12) is provided in the guide tube (12). The hollow guide wire (3) is integrally provided with a bending portion (31) for embedding in the nipple opening at one end close to the net basket body (21), and air bags (311) for expanding the nipple opening are provided on both sides of the bending portion (31). An inflation nozzle (32) for externally connecting an inflation device is provided at one end of the hollow guide wire (3) away from the bending portion (31). When the two air bags (311) are in an inflated state, the two air bags (311) are V-shaped in the nipple opening, and a gap is formed in the middle for the net basket body (21) to pass through.

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