Novel precise duodenal papilla windowing knife

Abstract

The invention relates to the field of medical instruments, and discloses a novel precise duodenal papilla windowing knife which comprises a handle body, a needle tube body is fixedly connected to one side of the handle body, an injection connector and a guide wire access port are arranged on the outer side of the handle body, and a needle knife is arranged at the end, away from the handle body, of the needle tube body. A traction wire is slidably connected into the needle tube body, a flushing assembly is fixedly mounted on the side wall of the handle body, a sliding handle is slidably connected to the outer side of the handle body, a high-frequency electrode is fixedly mounted on the surface of the sliding handle, and an adjusting assembly is mounted on the side, away from the needle knife, of the handle body. According to the structure of the needle knife, the knife outlet length of the needle knife can be conveniently adjusted, and the operation in the windowing operation process is more convenient.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and specifically to a novel precise duodenal papilla fenestration knife. Background Art

[0002] With the continuous development of endoscopic technology and the continuous improvement of its accessories, currently, endoscopic retrograde cholangiopancreatography (ERCP) has become an important means for diagnosing and treating biliary and pancreatic diseases, including common bile duct stones, benign and malignant biliary strictures, biliary tract injuries, biliary tract complications after liver transplantation, and pancreatic duct-related diseases, etc. Compared with traditional open surgery, this technology has the advantages of less trauma, high safety factor, and quick recovery. Under the combined observation of direct endoscopic vision and X-ray, it can detect biliary and pancreatic diseases that cannot be detected by conventional hepatobiliary, spleen, pancreas CT, ultrasound, and magnetic resonance examinations, and at the same time perform minimally invasive endoscopic treatment. Endoscopic sphincterotomy (EST) is the basis for almost all therapeutic ERCP operations. For example, before performing common bile duct stone extraction, placing internal and external drainage tubes for biliary and pancreatic ducts, and placing biliary metal stents, EST is mostly required first. At the same time, EST is also used for the treatment of diseases such as duodenal papilla stenosis, papillitis, choledochopancreatic maljunction, and duodenal papilla sphincter dysfunction, and its clinical application is very extensive.

[0003] The needle-type knife duodenal papilla fenestration is an important remedial measure when conventional EST is difficult or fails. When the needle-type cutting knife cuts the papilla through the duodenoscope, the duodenal papilla sphincter is gradually cut from top to bottom or from bottom to top at the bulging part on the surface of the papilla. This operation has a high technical difficulty and often requires an experienced ERCP operator to complete. During the operation, if the operator lacks experience, the cutting knife is likely to extend too long, resulting in perforation of the duodenal wall at the incision site and serious complications; or the cutting depth is too shallow, resulting in local anatomical structure disorder and bleeding, and ultimately the failure of the operation. The existing needle-type knives cannot adjust the length of the knife out according to the shape of the duodenal papilla. At the same time, the existing needle-type cutting knives are not convenient for flushing the wound surface at the fenestration incision site during the operation, which affects the clarity of the field of vision during the fenestration operation. In addition, the existing needle-type cutting knives cannot be finely adjusted in multiple dimensions, which greatly limits the fine operation during the operation. Summary of the Invention

[0004] The purpose of the present invention is to provide a novel precise duodenal papilla fenestration knife to solve the problems raised in the above background art.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a new type of precise duodenal papilla window knife, comprising a handle body, a needle tube body fixedly connected to one side of the handle body, and an injection connector and a guide wire access port are respectively provided on the outside of the handle body, a needle knife is provided at one end of the needle tube body away from the handle body, and a traction wire is slidably connected inside the needle tube body, a flushing assembly is fixedly installed on the side wall of the handle body, and a sliding handle is slidably connected to the outside of the handle body, a high-frequency electrode is fixedly installed on the surface of the sliding handle, and an adjustment assembly is installed on the side of the handle body away from the needle knife.

[0006] Preferably, the needle tube body has a first lumen, a second lumen, a third lumen and a fourth lumen opened in the central position along the axial direction, and the first lumen is adapted to the outer shape of the needle knife.

[0007] Preferably, the second lumen, the third lumen and the fourth lumen are distributed along the outside of the first lumen, and one side of the first lumen, the second lumen, the third lumen and the fourth lumen are respectively connected with the end of the needle tube body away from the handle body.

[0008] Preferably: a sliding groove is opened on the surface of the handle body along the axial direction, and a sliding part that is slidably adapted to the sliding groove is provided on one side of the sliding handle, one end of the sliding handle is fixedly connected to one end of the traction wire, and the other end of the traction wire is inserted along the second cavity and slides through the side wall of the needle tube body, and the end of the traction wire away from the handle body is fixedly connected to the side wall of the needle tube body away from the handle body.

[0009] Preferably, the flushing assembly comprises a liquid storage cylinder fixedly connected to the side wall of the handle body, and a movable plug is slidably arranged in the liquid storage cylinder, a cleaning liquid inlet is fixedly arranged on one side of the liquid storage cylinder, and a positioning block is fixedly installed on the top of the liquid storage cylinder.

[0010] Preferably: the liquid storage cylinder and the positioning block are slidably connected with an extrusion rod at the center position, and the bottom end of the extrusion rod extends into the liquid storage cylinder and is fixedly connected to the top end of the movable plug, the bottom end of the liquid storage cylinder is fixedly connected with a liquid outlet tube, and the other end of the liquid outlet tube is connected to the fourth cavity of the needle tube body.

[0011] Preferably: the adjustment assembly includes a rotating rod rotatably connected to the side wall of the handle body, and the rotating rod is located inside the handle body and is fixedly connected to a first bevel gear at one end, the inner wall of the handle body is rotatably connected to a rotating cross rod along the axial direction through a mounting frame, and a second bevel gear meshing with the first bevel gear is fixedly installed at one end of the rotating cross rod, and the second bevel gear is arranged at a right angle to the first bevel gear.

[0012] Preferably, the outer side of the rotating cross bar away from the second bevel gear is threaded, and the outer side thread of the rotating cross bar is matched with a threaded barrel, and the end of the threaded barrel away from the second bevel gear is fixedly connected to one end of the needle knife.

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

[0014] 1. Control the sliding handle to make its sliding part slide along the sliding groove, so that the sliding handle pulls the traction wire to one side, and the traction wire moves along the second cavity to pull the needle tube body away from the end of the handle body to be bent, so as to facilitate the needle knife to perform window opening operations in different dimensional directions;

[0015] 2. During the window opening process, the cleaning liquid inlet is connected to one end of the wound cleaning liquid, so that the cleaning liquid enters the liquid storage cylinder from the cleaning liquid inlet, and the cleaning liquid enters the fourth cavity through the liquid outlet tube inside the liquid storage cylinder, so that it flows out from the end of the needle tube body away from the handle body to rinse the windowed wound surface, thereby ensuring the clarity of the field of vision during the window opening process. After the window opening is completed, the cleaning liquid inlet valve on one side of the cleaning liquid inlet is closed, and the extrusion rod is pressed down in the vertical direction so that the positioning block drives the moving plug to descend along the inner wall of the liquid storage cylinder, thereby squeezing out the residual cleaning liquid in the liquid storage cylinder more quickly, further rinsing the wound surface, facilitating subsequent operations, and avoiding residual cleaning liquid in the liquid storage cylinder;

[0016] 3. Turn the adjusting knob so that the rotating rod fixedly connected to the bottom end of the adjusting knob drives the first bevel gear to rotate, thereby driving the rotating cross bar to rotate through the mutual engagement of the first bevel gear and the second bevel gear, so that the threaded barrel threadedly matched with the threaded structure of the rotating cross bar can drive the needle knife to move along the axis of the needle tube body, thereby controlling the length of the needle knife at the end of the needle tube body away from the handle body, so that the operator can adjust the length of the needle knife according to the different sizes of the duodenal papilla to ensure the safety when opening the window. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the regulating component of the present invention;

[0019] Figure 3 This is an enlarged schematic diagram of the structure at A of the present invention;

[0020] Figure 4 This is an enlarged schematic diagram of the structure at B of the present invention;

[0021] Figure 5 It is a schematic diagram of the needle tube body of the present invention.

[0022] In the figure: 1. handle body; 2. needle tube body; 3. injection connector; 4. guide wire access port; 5. needle knife; 6. traction wire; 7. flushing assembly; 8. sliding handle; 9. high-frequency electrode; 10. adjustment assembly; 11. slide groove; 71. liquid storage cylinder; 72. movable plug; 73. cleaning liquid access port; 74. positioning block; 75. squeezing rod; 76. liquid outlet pipe; 101. rotating rod; 102. first bevel gear; 103. second bevel gear; 104. rotating cross bar; 105. threaded barrel; 106. adjusting knob; 201. first cavity; 202. second cavity; 203. third cavity; 204. fourth cavity. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example

[0025] See also Figures 1-5 A new type of precise duodenal papilla window knife shown in the figure includes a handle body 1, a needle tube body 2 is fixedly connected to one side of the handle body 1, and an injection connector 3 and a guide wire access port 4 are respectively arranged on the outside of the handle body 1, a needle knife 5 is arranged at the end of the needle tube body 2 away from the handle body 1, and a traction wire 6 is slidably connected inside the needle tube body 2, a flushing component 7 is fixedly installed on the side wall of the handle body 1, and a sliding handle 8 is slidably connected to the outside of the handle body 1, a high-frequency electrode 9 is fixedly installed on the surface of the sliding handle 8, and an adjustment component 10 is installed on the side of the handle body 1 away from the needle knife 5.

[0026] In this embodiment, a first lumen 201, a second lumen 202, a third lumen 203 and a fourth lumen 204 are opened at the center position of the needle tube body 2 along the axial direction, and the first lumen 201 is adapted to the outer shape of the needle knife 5, the second lumen 202, the third lumen 203 and the fourth lumen 204 are distributed along the outer side of the first lumen 201, and one side of the first lumen 201, the second lumen 202, the third lumen 203 and the fourth lumen 204 are respectively connected with the end of the needle tube body 2 away from the handle body 1, a sliding groove 11 is opened on the surface of the handle body 1 along the axial direction, and a sliding portion slidably adapted to the sliding groove 11 is provided on one side of the sliding handle 8, one end of the sliding handle 8 is fixedly connected to one end of the traction wire 6, and the other end of the traction wire 6 is inserted into the second lumen 202 and slides through the side wall of the needle tube body 2, and the end of the traction wire 6 away from the handle body 1 is fixedly connected to the side wall of the needle tube body 2 away from the handle body 1.

[0027] Furthermore, the high-frequency electrode 9 is electrically connected to the needle knife 5 for driving the needle knife 5 and introducing high-frequency current into the needle knife 5. The injection connector 3 is used for the access of contrast agent, and the injection connector 3 is connected to the second cavity 202, and the guide wire access port 4 is used for the access of the guide wire, and the guide wire access port 4 is connected to the third cavity 203, which is convenient for the intubation operation after the window opening is completed. The sliding handle 8 is controlled so that its sliding part slides along the slide groove 11, so that the sliding handle 8 pulls the traction wire 6 to one side. The traction wire 6 moves along the internal displacement of the second cavity 202 to pull the needle tube body 2 away from the end of the handle body 1 to be bent, which is convenient for the needle knife 5 to perform window opening operations in different dimensional directions.

[0028] In this embodiment, the flushing assembly 7 includes a liquid storage cylinder 71 fixedly connected to the side wall of the handle body 1, and a movable plug 72 is slidably arranged in the liquid storage cylinder 71, a cleaning liquid inlet 73 is fixedly arranged on one side of the liquid storage cylinder 71, and a positioning block 74 is fixedly installed on the top of the liquid storage cylinder 71, and an extrusion rod 75 is slidably penetrated and connected at the center position of the liquid storage cylinder 71 and the positioning block 74, and the bottom end of the extrusion rod 75 extends to the inside of the liquid storage cylinder 71 and is fixedly connected to the top of the movable plug 72, and the bottom end of the liquid storage cylinder 71 is fixedly connected to a liquid outlet pipe 76, and the other end of the liquid outlet pipe 76 is connected to the fourth cavity 204 of the needle tube body 2.

[0029] Furthermore, during the window opening process, the cleaning liquid inlet 73 is connected to one end of the wound cleaning liquid, so that the cleaning liquid enters the interior of the liquid reservoir 71 through the cleaning liquid inlet 73, and the cleaning liquid enters the fourth cavity 204 through the liquid outlet pipe 76 through the interior of the liquid reservoir 71, thereby flowing out from the end of the needle tube body 2 away from the handle body 1 to rinse the windowed wound, thereby ensuring the clarity of the field of vision during the window opening process. After the window opening is completed, the cleaning liquid entry valve on one side of the cleaning liquid inlet 73 is closed, and the extrusion rod 75 is pressed downward in the vertical direction so that the positioning block 74 drives the movable plug 72 to descend along the inner wall of the liquid reservoir 71, thereby more quickly squeezing out the cleaning liquid remaining in the liquid reservoir 71, further rinsing the wound, facilitating subsequent operations, and avoiding residual cleaning liquid in the liquid reservoir 71.

[0030] The adjusting assembly 10 includes a rotating rod 101 which is rotatably connected to the side wall of the handle body 1, and the rotating rod 101 is located at one end inside the handle body 1 and is fixedly connected to a first bevel gear 102. The inner wall of the handle body 1 is rotatably connected to a rotating cross bar 104 along the axial direction through a mounting frame, and one end of the rotating cross bar 104 is fixedly installed with a second bevel gear 103 which meshes with the first bevel gear 102. The second bevel gear 103 is arranged at a right angle to the first bevel gear 102. The outer side of the rotating cross bar 104 away from the second bevel gear 103 is threaded, and the outer side of the rotating cross bar 104 is threadedly connected to a threaded barrel 105, and the threaded barrel 105 is fixedly connected to one end of the needle knife 5 away from the second bevel gear 103.

[0031] Furthermore, by rotating the adjusting knob 106, the rotating rod 101 fixedly connected to the bottom end of the adjusting knob 106 drives the first bevel gear 102 to rotate, thereby driving the rotating cross bar 104 to rotate through the mutual engagement of the first bevel gear 102 and the second bevel gear 103, so that the threaded barrel 105 threadedly matched with the threaded structure of the rotating cross bar 104 can drive the needle knife 5 to move along the axial direction of the needle tube body 2, thereby controlling the knife extension length of the needle knife 5 at the end of the needle tube body 2 away from the handle body 1, so that the operator can adjust the knife extension length of the needle knife 5 according to the different sizes of the duodenal papilla to ensure the safety level when opening the window.

[0032] The injection connector 3 is a contrast agent injection connector, which is used to inject contrast agents; at the same time, the injection connector 3 can also inject physiological saline to clean the wound surface and ensure a clear surgical field. The adjustment component 10 adjusts the horizontal displacement of the threaded barrel 105 by rotating the knob and the transmission of the gear set, and by rotating the crossbar 104, thereby adjusting the extension amount of the needle knife.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel precision duodenal papilla window cutter, comprising a handle body (1), characterized in that: The handle body (1) is fixedly connected to a needle tube body (2) on one side, and an injection connector (3) and a guide wire access port (4) are respectively arranged on the outside of the handle body (1); a needle knife (5) is arranged on the end of the needle tube body (2) away from the handle body (1), and a traction wire (6) is slidably connected inside the needle tube body (2); a flushing assembly (7) is fixedly installed on the side wall of the handle body (1), and a sliding handle (8) is slidably connected to the outside of the handle body (1); a high-frequency electrode (9) is fixedly installed on the surface of the sliding handle (8), and an adjustment assembly (10) is installed on the side of the handle body (1) away from the needle knife (5).

2. A novel precision duodenal papilla fenestration knife according to claim 1, characterized in that: The needle tube body (2) has a first lumen (201), a second lumen (202), a third lumen (203) and a fourth lumen (204) at the center thereof along the axial direction, and the first lumen (201) is adapted to the outer shape of the needle knife (5).

3. The novel precise duodenal papilla fenestration knife according to claim 2 is characterized by: The second lumen (202), the third lumen (203) and the fourth lumen (204) are distributed along the outside of the first lumen (201), and one side of the first lumen (201), the second lumen (202), the third lumen (203) and the fourth lumen (204) are respectively connected to the end of the needle tube body (2) away from the handle body (1).

4. The novel precise duodenal papilla fenestration knife according to claim 3 is characterized by: A sliding groove (11) is provided on the surface of the handle body (1) along the axial direction, and a sliding portion slidably adapted to the sliding groove (11) is provided on one side of the sliding handle (8), one end of the sliding handle (8) is fixedly connected to one end of the traction wire (6), and the other end of the traction wire (6) is inserted along the second cavity (202) and slides through the side wall of the needle tube body (2), and the end of the traction wire (6) away from the handle body (1) is fixedly connected to the side wall of the needle tube body (2) away from the handle body (1).

5. The novel precise duodenal papilla fenestration knife according to claim 4 is characterized by: The flushing assembly (7) comprises a liquid storage cylinder (71) fixedly connected to the side wall of the handle body (1), and a movable plug (72) is slidably arranged in the liquid storage cylinder (71), a cleaning liquid inlet (73) is fixedly arranged on one side of the liquid storage cylinder (71), and a positioning block (74) is fixedly installed on the top of the liquid storage cylinder (71).

6. The novel precise duodenal papilla fenestration knife according to claim 5 is characterized by: The liquid storage cylinder (71) and the positioning block (74) are slidably connected to an extrusion rod (75) at the center thereof, and the bottom end of the extrusion rod (75) extends into the interior of the liquid storage cylinder (71) and is fixedly connected to the top end of the movable plug (72). The bottom end of the liquid storage cylinder (71) is fixedly connected to a liquid outlet tube (76), and the other end of the liquid outlet tube (76) is connected to the fourth cavity (204) of the needle tube body (2).

7. The novel precise duodenal papilla fenestration knife according to claim 6 is characterized by: The adjustment assembly (10) comprises a rotating rod (101) rotatably connected to the side wall of the handle body (1), and one end of the rotating rod (101) is located inside the handle body (1) and is fixedly connected to a first bevel gear (102). The inner wall of the handle body (1) is rotatably connected to a rotating cross rod (104) along the axial direction through a mounting frame, and one end of the rotating cross rod (104) is fixedly installed with a second bevel gear (103) that meshes with the first bevel gear (102), and the second bevel gear (103) is arranged at a right angle to the first bevel gear (102).

8. The novel precise duodenal papilla fenestration knife according to claim 7 is characterized by: The outer side of the rotating cross bar (104) away from the second bevel gear (103) is threaded, and the outer side of the rotating cross bar (104) is threadedly connected to a threaded tube (105), and the end of the threaded tube (105) away from the second bevel gear (103) is fixedly connected to one end of the needle knife (5).

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