CN221411302U - Improved ERCP stone removal basket with dilatation balloon - Google Patents

Abstract

An improved ERCP stone removal basket comprises a metal control wire, a catheter and an injection seat. The injection seat is assembled on one end of the catheter, a first channel is arranged in the catheter, the metal control wire penetrates through the injection seat and the first channel, and a metal basket for taking stones is connected to the penetrating end portion. The injection seat is provided with a second injection port, one end, close to the metal basket, of the catheter is provided with an expansion balloon, a second channel which is not communicated with the first channel is arranged in the catheter, and the second channel is communicated with the second injection port and the expansion balloon. The metal basket is an independent structure capable of passing through the guide pipe. Compared with the prior art, the application has the following beneficial effects: the stone taking basket has the expansion function of the balloon catheter, the original two steps of firstly expanding by using the expansion balloon and then replacing the stone taking basket for taking stones are simplified into one step, the operation time is greatly shortened, and the risk of complications caused by twice insertion of bile ducts is effectively avoided.

Description

Improved ERCP stone removal basket with dilatation balloon

Technical Field

The utility model belongs to the field of stone removal net baskets, and in particular relates to an improved ERCP stone removal net basket with an expansion balloon.

Background technique

The stone retrieval basket is a medical device used to capture and remove stones, foreign bodies, etc. in the body cavity. In many medical applications, such as urology, gastroenterology, neurology, etc., the stone retrieval basket has become a common tool.

For example, when used in gastroenterology and general surgery endoscopic treatment of common bile duct stones: the stone removal basket is used to capture and remove stones, foreign bodies, etc. in the common bile duct after successful papillary intubation and incision under duodenoscope. The existing ERCP stone removal basket is usually made of soft metal wire, one end of which is provided with an openable basket, and then a metal wire is seamlessly connected and pre-installed in a catheter. The basket is in a closed state in the catheter and opens when the basket extends from the front end of the catheter. However, the existing technology has some disadvantages:

1. When using the existing ERCP stone removal basket to remove stones from the bile duct, the doctor must first perform a sphincterotomy on the duodenal papilla or dilate the papilla opening with a papilla dilation balloon catheter before inserting the ERCP stone removal basket into the bile duct to remove the stones. This increases the complexity of the operation, consumes extra time and energy, and reduces the efficiency of the operation.

2. Doctors can use ERCP stone basket to remove stones from the common bile duct only after the papillary sphincterotomy. The papillary sphincterotomy increases the risk of complications such as bleeding and duodenal perforation that may occur during the incision.

In summary, the existing stone removal basket technology has problems such as difficult operation, long operation time, and possible damage to cavity tissue, and it is in urgent need of improvement.

Utility Model Content

In view of the above deficiencies in the prior art, the utility model provides an improved ERCP stone removal basket, specifically, an improved ERCP stone removal basket with an expansion balloon.

In order to solve the above technical problems, the utility model solves them through the following technical solutions.

An improved ERCP stone removal basket comprises a metal control line, a catheter and an injection seat. The injection seat is mounted on one end of the catheter, a first channel is provided in the catheter, the metal control line passes through the injection seat and the first channel, and a metal basket for stone removal is connected to the end through which it passes. A second injection port is provided on the injection seat, an expansion balloon is provided at one end of the catheter close to the metal basket, a second channel which is not interconnected with the first channel is provided in the catheter, and the second channel connects the second injection port and the expansion balloon. The metal basket is an independent structure that can pass through the catheter.

Taking bile duct stone removal surgery as an example, the doctor can inject the expansion medium through the second injection port to expand the expansion balloon to open the duodenal papilla opening, so as to facilitate the metal mesh basket to pull out foreign objects such as stones in the bile duct.

As a preferred embodiment of the improved ERCP stone removal basket described in the present application, specifically, the injection seat is provided with a first injection port for injecting contrast agent, so that the present application can have the function of contrast agent injection, which is convenient for doctors to observe the lesions in the bile duct.

As a preferred embodiment of the improved ERCP stone removal basket described in the present application, specifically, the first injection port is connected to the first channel, so that the contrast agent can flow into the bile duct along the first channel, making it convenient for doctors to observe stones in the bile duct.

As a preferred embodiment of the improved ERCP stone removal basket described in the present application, specifically, a one-way valve structure is provided on the second injection port and the first injection port to prevent the backflow of the injected expansion medium and contrast agent.

As a preferred embodiment of the improved ERCP stone removal basket described in the present application, specifically, the metal basket is provided with a guide head at the head, and the guide head is used to guide the metal basket to move in the cavity.

As a preferred embodiment of the improved ERCP stone removal basket described in the present application, specifically, the edge of the end of the guide head adopts a rounded transition to prevent damage to the cavity.

As a preferred embodiment of the improved ERCP stone retrieval basket described in the present application, specifically, the injection seat is equipped with a threaded cap, and the threaded cap is used to seal the first channel.

Compared with the prior art, the present application has the following beneficial effects: the stone removal basket is endowed with the expansion function of the balloon catheter, and the original two steps of first expanding the stone removal basket with an expansion balloon and then replacing the stone removal basket are simplified into one step, which greatly shortens the operation time and effectively avoids the risk of complications caused by two insertions into the bile duct.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a three-dimensional schematic diagram of the present application.

FIG. 2 is a partial enlarged view of point A in FIG. 1 .

FIG. 3 is a schematic structural diagram of an injection seat.

FIG. 4 is a cross-sectional view of the structure of the injection seat in the present application.

FIG5 is a cross-sectional view of the structure of the expansion balloon in the present application.

FIG. 6 is a schematic cross-sectional view of a catheter in the present application.

The following is a description of the markings in the accompanying drawings of the specification:

1. Threaded cap;

2. catheter; 21. first channel; 22. second channel; 24. dilatation balloon;

3. Metal control wire; 31. Net basket control rod;

4. Metal mesh basket; 41. Guide head; 42. Basket wire;

5. injection seat; 51. second injection port; 52. first injection port;

6. Check valve structure.

Detailed ways

The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

In the following embodiments, the same or similar numbers throughout represent the same or similar components or components with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limitations on the present invention.

In the description of the present utility model, it should be understood that the terms: center, longitudinal, transverse, length, width, thickness, up, down, front, back, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model and simplifying the description, and therefore cannot be understood as limiting the present utility model. In addition, the terms: first, second, etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features shown. In the description of the present utility model, unless otherwise clearly specified and limited, the terms: install, connect, connect, etc. should be understood in a broad sense, and ordinary technicians in this field can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

When the stone removal basket of the prior art is used in operations such as common bile duct stone removal, the doctor needs to first use the catheter 2 with the expansion balloon 24 to expand the duodenal papilla opening, and then use the stone removal basket to remove foreign bodies such as stones. Since the catheter 2 with the expansion balloon 24 and the stone removal basket are two different surgical tools, the operation is cumbersome and takes a long time.

The present application proposes an improved ERCP stone removal basket, referring to Figures 1 to 6, which includes a metal control wire 3, a catheter 2 and an injection seat 5. The injection seat 5 is assembled on one end of the catheter 2, and a first channel 21 is provided in the catheter 2. The metal control wire 3 passes through the injection seat 5 and the first channel 21, and is connected to a metal mesh basket 4 for stone removal at the end through which it passes. The metal control wire 3 is provided with a mesh basket control rod 31 at one end of the injection seat 5. A second injection port 51 is provided on the injection seat 5, and an expansion balloon 24 is provided at one end of the catheter 2 close to the metal mesh basket 4. A second channel 22 that is not interconnected with the first channel 21 is provided in the catheter 2, and the second channel 22 connects the second injection port 51 and the expansion balloon 24. The metal mesh basket 4 is an independent structure that can pass through the catheter 2.

Taking the application of the stone removal basket described in this application in bile duct stone removal surgery as an example, the doctor can inject the expansion medium through the second injection port 51 to expand the expansion balloon 24 to open the duodenal papilla opening, thereby facilitating the metal basket 4 to pull out foreign objects such as stones in the bile duct.

In the present application, the metal mesh basket 4 is provided with a guide head 41 at the head, and the guide head 41 is used to guide the metal mesh basket 4 to move in the cavity. The edge of the end of the guide head 41 adopts a rounded transition to prevent damage to the cavity. In particular, the injection seat 5 is equipped with a threaded cap 1, and the threaded cap 1 is used to seal the first channel 21.

In particular, the injection seat 5 is provided with a first injection port 52 for injecting contrast agent. The first injection port 52 is connected to the first channel 21. The contrast agent can flow into the bile duct along the first channel 21, which is convenient for doctors to observe the lesions in the bile duct. In order to prevent the injected expansion medium and contrast agent from flowing back, a one-way valve structure 6 is provided on the second injection port 51 and the first injection port 52.

Preferably, in the present application, the expansion medium filled in the expansion balloon 24 may be air, saline or contrast agent. The metal mesh basket 4 is woven from a basket wire 42 made of nickel-titanium alloy. The expansion balloon 24 is 3 cm long and has a diameter of 1 to 1.2 cm after expansion.

The improved ERCP stone removal basket described in the present application can be applied to the field of gastroenterology, such as in gastroenterology and general surgery endoscopic treatment of common bile duct stones:

1. The doctor first inserts the end with the expansion balloon 24 into the patient's bile duct. At this time, the end of the catheter 2 with the expansion balloon 24 is the intracorporeal end, and the end with the injection seat 5 is the extracorporeal end. Then, the expansion medium is injected through the second injection port 51 to expand the expansion balloon 24 to the set diameter to expand the nipple opening.

2. Insert the metal basket 4 into the first channel 21 and extend it from the inner end of the body to capture the stones in the common bile duct. During this time, inject contrast agent through the first injection port 52 so that the contrast agent can enter the common bile duct along the catheter 2 to facilitate the doctor to observe the location and distribution of stones in the common bile duct.

Compared with the prior art, the present application simplifies the complicated operation that originally required two procedures, namely, first using a balloon to dilate the nipple opening, and then pulling out the balloon and reinserting the metal mesh basket 4 into the bile duct to remove stones, into one procedure of directly performing the mesh basket to remove stones after the nipple opening is dilated with a balloon, without pulling out the balloon. This greatly shortens the operation time and avoids complications caused by two insertions into the bile duct.

The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention shall be based on the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by technicians in this field shall fall within the protection scope of the present invention.

Claims (7)

1. An improved ERCP stone removal basket is characterized by comprising a metal control wire (3), a guide pipe (2) and an injection seat (5);

The injection seat (5) is assembled at one end of the guide pipe (2), a first channel (21) is arranged in the guide pipe (2), the metal control wire (3) passes through the injection seat (5) and the first channel (21), and a metal basket (4) for taking stones is connected at the passing end part;

The injection seat (5) is provided with a second injection opening (51), one end, close to the metal basket (4), of the catheter (2) is provided with an expansion balloon (24), a second channel (22) which is not communicated with the first channel (21) is arranged in the catheter (2), and the second channel (22) is communicated with the second injection opening (51) and the expansion balloon (24);

the metal basket (4) is of an independent structure which can pass through the guide pipe (2).

2. An improved ERCP stone removal basket as claimed in claim 1, wherein said injection seat (5) is provided with a first injection port (52).

3. An improved ERCP stone removal basket as claimed in claim 2 wherein said first injection port (52) communicates with said first channel (21).

4. An improved ERCP stone removal basket as claimed in claim 2 wherein said second (51) and first (52) injection ports are provided with one-way valve structures (6).

5. An improved ERCP stone removal basket according to claim 1, wherein said metal basket (4) is provided with a guide head (41) at the head.

6. An improved ERCP stone basket, as in claim 5, wherein said guide head (41) end edges are rounded.

7. An improved ERCP stone removal basket as claimed in claim 1, wherein said injection seat (5) is fitted with a threaded cap (1).