Integrated incision drainage catheter

Abstract

The integrated incision drainage catheter comprises an inner tube, a drainage tube and an outer tube, a cutting wire is arranged at the front end of the inner tube, the inner tube is provided with an injection cavity, a cutting wire cavity and a guide wire cavity, the cutting wire is located in the cutting wire cavity, the drainage tube and the outer tube are sequentially connected to the inner tube in a sleeved mode from front to back, and the guide wire cavity is located in the guide wire cavity. The rear end of the drainage tube is connected with the front end of the outer tube through a binding wire; when the outer tube is pushed, the drainage tube advances or retreats along the inner tube; the rear end of the inner tube is connected with the handle assembly. According to the integrated incision and drainage catheter, the effects of an incision knife and a biliary tract drainage tube are achieved on one instrument, incision, intubation and drainage can be achieved at the same time, the number of times of instrument exchange is reduced, surgical operation is simplified, the occurrence rate of surgical complications is reduced, and the integrated incision and drainage catheter is safer and more effective.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an integrated incision and drainage catheter. Background Technology

[0002] Endoscopic retrograde cholangiopancreatography (ERCP) involves inserting a duodenoscope into the descending duodenum to locate the duodenal papilla. A contrast catheter is then inserted through the biopsy tube to the papillary opening, and contrast agent is injected before X-ray imaging to visualize the pancreatic and bile ducts. Due to its safety, minimally invasive nature, and effectiveness, ERCP has become an important treatment for pancreatic and biliary diseases. This technique is currently widely used in the diagnosis and treatment of bile duct obstruction, gallstones, bile duct cancer, pancreatic cancer, and chronic pancreatitis. Commonly used instruments in ERCP include a papillary incision device (hereinafter referred to as the incision knife) and a bile duct drainage tube. The incision knife is used during endoscopic sphincterotomy (EST) to incise the sphincter of Oddi at the duodenal papilla, thus enlarging the papillary opening for catheter insertion and stone removal. A bile duct drainage tube is an internal drainage tube used in endoscopic bile duct drainage (EBD) procedures. It is placed at the site of biliary stricture to drain bile. Endoscopic placement of biliary stents is an effective treatment for difficult-to-remove common bile duct stones, multiple stones, etc., especially for elderly patients. In addition, it can quickly relieve biliary obstruction and ensure unobstructed drainage.

[0003] In ERCP stone removal, difficult intubation is often encountered, requiring the sphincter of Oddi to be cut before subsequent stone, obstruction treatment and drainage can be performed. However, existing instruments can only be changed after the sphincter is cut before the bile duct drainage can continue. This repeated instrument change prolongs the operation time, increases the difficulty of the operation, and can lead to complications during multiple operations, causing more discomfort to the patient.

[0004] In response to the problems with existing technologies, there is an urgent need for an integrated incision and drainage catheter that can allow for continued EBD procedures without changing instruments after EST, simultaneously meeting the needs of incision, catheterization, and drainage, thus greatly improving surgical efficiency. Utility Model Content

[0005] The purpose of this invention is to provide an integrated incision and drainage catheter that allows for continued EBD procedures without changing instruments after EST, simultaneously meeting the needs of incision, catheterization, and drainage, thus greatly improving surgical efficiency.

[0006] According to one aspect of this utility model, an integrated incision and drainage catheter is provided, comprising an inner tube, a drainage tube, and an outer tube. The inner tube has a cutting wire at its front end and is provided with an injection chamber, a cutting wire chamber, and a guide wire chamber. The cutting wire is located in the cutting wire chamber. The drainage tube and the outer tube are sequentially sleeved on the inner tube from front to back. The rear end of the drainage tube is connected to the front end of the outer tube by a binding wire. When the outer tube is pushed, the drainage tube moves forward or backward along the inner tube. The rear end of the inner tube is connected to the handle assembly.

[0007] Preferably, the drainage tube has a first through hole at its rear end and the outer tube has a second hole at its front end, and the binding wire connects the drainage tube and the outer tube through the first through hole and the second hole.

[0008] Preferably, the handle assembly includes a handle rod and a handle ring, the handle ring slides along the handle rod, the rear end of the inner tube is connected to the handle rod, the rear end of the shredder is connected to the handle ring, and pushing the handle ring causes the shredder to enter and exit the inner tube.

[0009] Preferably, the distal end of the inner tube is provided with a first developing ring, and / or the distal end of the inner tube is also provided with a color band, the color band being located behind the developing ring.

[0010] Preferably, the outer diameter of the distal end of the inner tube is 1.64-1.84 mm, and the outer diameter of the proximal end of the inner tube is 1.9-2.4 mm.

[0011] Preferably, the proximal end of the inner tube is further provided with a guidewire exchange port, an injection chamber inlet, and an electrode. The guidewire exchange port is connected to the guidewire chamber, and the injection chamber inlet is connected to the injection chamber. The electrode is disposed on the handle ring, and the rear end of the wire cutter is connected to the electrode.

[0012] Preferably, a second developing ring is provided at the distal end of the outer tube.

[0013] Preferably, the shredded material is needle-shaped or bow-shaped.

[0014] Preferably, it further includes a booster tube, which is sleeved on the inner tube, and the rear end of the outer tube is connected to the front end of the booster tube; the booster tube is pushed so that the outer tube moves forward or backward along the inner tube, and the rear end of the inner tube extends out of the booster tube.

[0015] Preferably, the distal end of the inner tube is a tapered hole.

[0016] This utility model's integrated incision and drainage catheter combines the effects of an incision knife and a biliary drainage tube into one instrument, simultaneously fulfilling the functions of incision, tube insertion, and drainage. This reduces the number of instrument exchanges, simplifies surgical procedures, reduces the incidence of surgical complications, and is safer and more effective. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of an integrated incision and drainage catheter;

[0018] Figure 2 This is a cross-sectional view of the inner tube;

[0019] Figure 3 This is a schematic diagram of the structure of the proximal end of the inner tube;

[0020] Figure 4 This is a schematic diagram of the connection between the drainage tube and the outer tube;

[0021] Figure 5 This is a schematic diagram of the structure at the distal end of the inner tube. Detailed Implementation

[0022] To facilitate understanding of this application and to make the aforementioned objectives, features, and advantages of this application more apparent, a detailed description of specific embodiments of this application is provided below in conjunction with the accompanying drawings. Numerous specific details are set forth in the following description to provide a thorough understanding of this application, and preferred embodiments are shown in the accompanying drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application. This application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application; therefore, this application is not limited to the specific embodiments disclosed below.

[0023] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly specified. In the description of this application, "several" means at least one, such as one, two, etc., unless otherwise expressly specified. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can also refer to the internal connection between two components.

[0025] For ease of description, in this instruction manual, the end of the inner tube furthest from the operator during use is defined as the distal end, or the front end, while the end held by the operator is defined as the proximal end, or the rear end.

[0026] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0027] like Figure 1-5 As shown, the integrated incision and drainage catheter of this embodiment includes an inner tube 2, a drainage tube 3, an outer tube 4, and a pusher tube 5. The inner tube 2 has a cutting wire 1 at its front end. The inner tube 2 has an injection chamber 21, a cutting wire chamber 22, and a guide wire chamber 23. The cutting wire 1 is located in the cutting wire chamber 22. The drainage tube 3, the outer tube 4, and the pusher tube 5 are sequentially sleeved on the inner tube 2 from front to back. The rear end of the drainage tube 3 is connected to the front end of the outer tube 4 by a binding wire 10. The rear end of the outer tube 4 is connected to the front end of the pusher tube 5. Pushing the pusher tube 5 causes the outer tube 4 and the drainage tube 3 to move forward or backward along the inner tube 2. The pusher tube 5 extends from the rear end of the inner tube 2, and the rear end of the inner tube 2 is connected to the handle assembly 6. In this invention, during ERCP surgery, the choledochoscope is first inserted into a suitable location, and a guidewire is used to locate the duodenal papilla. Using an appropriate power setting, the cutting wire 1 is energized, and the operating handle assembly 6 drives the cutting wire 1 to cut the sphincter of Oddi. The inner tube 2 is then inserted into the bile duct along the guidewire, and the distal end of the drainage tube 3 is passed through the site of stone or obstruction. At this point, by retracting the guidewire and handle assembly 6, the inner tube 2 is withdrawn, and the sutures binding the drainage tube 3 and the outer tube 4 are gradually loosened. Simultaneously, while withdrawing the inner tube 2, the position of the drainage tube 3 can be adjusted by retracting the pusher tube 5 until the proximal end of the drainage tube 3 is released at the sphincter of Oddi, thereby achieving the functions of unblocking bile duct obstruction and draining bile. This invention achieves the effects of both a sphincter of Oddi incision and a bile duct drainage tube in one instrument, simultaneously satisfying the needs of incision, insertion, and drainage, reducing the number of instrument exchanges, and is safe and effective.

[0028] Specifically, the drainage tube 3 has a first through hole at its rear end, and the outer tube 4 has a second hole at its front end. The binding thread 10 connects the drainage tube 3 and the outer tube 4 through the first through hole and the second hole. The binding thread 10 effectively fixes the drainage tube 3 and the outer tube 4. During the release process, the position of the drainage tube 3 can be adjusted by retracting the outer tube 4. The handle assembly 6 includes a handle rod 61 and a handle ring 62. The handle ring 62 slides along the handle rod 61. The rear end of the inner tube 2 is connected to the handle rod 61, and the rear end of the wire cutter 1 is connected to the handle ring 62. Pushing the handle ring 62 causes the wire cutter 1 to enter and exit the inner tube 2. The proximal end of the inner tube 2 is also provided with a guidewire exchange port 7, an injection chamber inlet 8, and an electrode 9. The guidewire exchange port 7 communicates with the guidewire chamber 23, and the injection chamber inlet 8 communicates with the injection chamber 21. The electrode 9 is set on the handle ring 62, and the rear end of the wire cutter 1 is connected to the electrode 9. The three-chamber design of the inner tube 2 can simultaneously meet the requirements of contrast agent injection, guidewire insertion, and wire cutter 1 insertion.

[0029] More specifically, the distal end of the inner tube 2 is provided with a first contrast ring 12, and / or, the distal end of the inner tube 2 is also provided with a color band 13, which is located behind the contrast ring 12. The combination design of the contrast ring and color band on the inner tube 2 allows the instrument to be directly visualized under endoscopy and positioned and visualized under X-ray. The outer diameter of the distal end of the inner tube 2 is 1.64-1.84 mm, and the length of the distal end of the inner tube 2 is 50 mm. The outer diameter of the proximal end of the inner tube 2 is 1.9-2.4 mm, and the length of the proximal end of the inner tube 2 is 1500 mm. The special variable diameter design of the inner tube 2, with a smaller outer diameter at the distal end for easy pre-loading of the drainage tube 3 and insertion operation, and a larger outer diameter at the proximal end to enhance the operability of the tube body in the endoscope. The distal end of the outer tube 4 is provided with a second contrast ring 11, which facilitates accurate positioning when observing and releasing the drainage tube 3, and facilitates the release of the proximal end of the drainage tube 3 at the papillary sphincter. The distal end of the inner tube 2 has a tapered orifice, which is rounded, increasing the safety of instrument use and reducing complications. The cutting wire 1 can be either a needle-type or an arc-shaped cutting wire, depending on the patient's nipple opening, improving surgical efficiency and ensuring surgical safety.

[0030] This utility model presents an integrated incision and drainage catheter, which combines the effects of an incision knife and a biliary drainage tube into one instrument. It can simultaneously perform incision, tube insertion, and drainage, reducing the number of instrument exchanges, simplifying surgical procedures, reducing the incidence of surgical complications, and making it safer and more effective.

[0031] It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments described above without departing from the spirit and scope of the invention. Therefore, it is intended that this invention cover modifications and variations falling within the scope of the appended claims and their equivalents.

Claims

1. An integrated incision and drainage catheter, comprising a handle assembly (6), an inner tube (2), a drainage tube (3) and an outer tube (4), the inner tube (2) being provided with a cutting wire (1) at the front end, the inner tube (2) being provided with an injection cavity (21), a cutting wire cavity (22) and a guide wire cavity (23), the cutting wire (1) being located in the cutting wire cavity (22), characterized in that, The inner tube (2) is fitted with the drainage tube (3) and the outer tube (4) from front to back. The rear end of the drainage tube (3) is connected to the front end of the outer tube (4) by a binding wire (10). When the outer tube (4) is pushed, the drainage tube (3) moves forward or backward along the inner tube (2). The rear end of the inner tube (2) is connected to the handle assembly (6).

2. The integrated incision and drainage catheter as described in claim 1, characterized in that: The drainage tube (3) has a first through hole at its rear end and the outer tube (4) has a second hole at its front end. The binding wire (10) connects the drainage tube (3) and the outer tube (4) through the first through hole and the second hole.

3. The integrated incision and drainage catheter as described in claim 1, characterized in that: The handle assembly (6) includes a handle rod (61) and a handle ring (62). The handle ring (62) slides along the handle rod (61). The rear end of the inner tube (2) is connected to the handle rod (61), and the rear end of the shredder (1) is connected to the handle ring (62). Pushing the handle ring (62) causes the shredder (1) to enter and exit the inner tube (2).

4. The integrated incision and drainage catheter as described in claim 1, characterized in that: The inner tube (2) is provided with a first imaging ring (12) at its distal end, and / or, The inner tube (2) is also provided with a color band (13) at its far end, and the color band (13) is located behind the developing ring (12).

5. The integrated incision and drainage catheter as described in claim 1, characterized in that: The outer diameter of the distal end of the inner tube (2) is 1.64-1.84 mm, and the outer diameter of the proximal end of the inner tube (2) is 1.9-2.4 mm.

6. The integrated incision drainage conduit of claim 3, wherein: The inner tube (2) is also provided with a guide wire exchange port (7), an injection chamber inlet (8) and an electrode (9) at its proximal end. The guide wire exchange port (7) is connected to the guide wire chamber (23), and the injection chamber inlet (8) is connected to the injection chamber (21). The electrode (9) is disposed on the handle ring (62), and the rear end of the wire cutter (1) is connected to the electrode (9).

7. The integrated incision drainage conduit of claim 1, wherein: The outer tube (4) is provided with a second developing ring (11) at its distal end.

8. The integrated incision drainage conduit of claim 1, wherein: The shredded material (1) is either needle-shaped or bow-shaped.

9. The unitary incision and drainage catheter of claim 1, wherein: It also includes a booster tube (5), which is sleeved on the inner tube (2), and the rear end of the outer tube (4) is connected to the front end of the booster tube (5); the booster tube (5) is pushed so that the outer tube (4) moves forward or backward along the inner tube (2), and the rear end of the inner tube (2) extends out of the booster tube (5).

10. The integrated incision drainage conduit of claim 1, wherein: The distal end of the inner tube (2) is a tapered hole.

Images