Gall bladder tube intubation catheter capable of selecting direction

Abstract

The utility model provides a direction-selectable gallbladder tube intubation catheter. The direction-selectable gallbladder tube intubation catheter specifically comprises a circular linking insert and a catheter head, one end of the circular linking insertion piece is movably inserted into the catheter head, the other end of the circular linking insertion piece is provided with a through hole with an arc-shaped end part, and a plurality of groups of open holes are independently formed in the tube wall of the circular linking insertion piece on two sides of the through hole; the open hole is an inclined hole which forms a certain angle along the central axis of the circular linking plug-in; wherein the circular linking inserting piece and the catheter head are both of a pipe structure, and after being inserted, the circular linking inserting piece and the catheter head can rotate by 360 degrees in the horizontal direction along the inserting position and cannot move front and back along the central axis. The direction of the intubation catheter can be freely changed, and the direction of the catheter can be flexibly changed by 360 degrees, so that the opening position of the gallbladder tube can be found and anchored, and finally the key step of intubation of the gallbladder tube is smoothly completed.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical instruments, and particularly relates to a gallbladder duct intubation catheter with selectable direction. Background Art

[0002] In recent years, endoscopic transpapillary gallbladder drainage (ETGBD) has become an effective and safe procedure for the clinical treatment of acute cholecystitis, especially in cases with bleeding tendency, thrombocytopenia, ascites, or anatomical changes that make percutaneous transhepatic gallbladder drainage (PTGBD) impossible.

[0003] During the operation, after successful transpapillary bile duct cannulation, contrast agent is injected for cholangiography to clarify the course and morphology of the common bile duct and cystic duct. After confirming the bifurcation of the cystic duct, selective bifurcation of the cystic duct is performed (it is often necessary to first pass the guide wire into the cystic duct, and then the catheter enters the cystic duct and gallbladder along the guide wire in sequence). However, due to the various changes in the morphology of the bifurcation of the cystic duct, the guide wire is often unable to enter the cystic duct smoothly. Figure 1 It is the branching morphology of the existing cystic duct.

[0004] Therefore, how to superselect the guidewire to the cystic duct becomes the key issue for the success of this technology. Due to the combined effects of factors such as the diameter of the common bile duct, the number and size of gallstones compressing the cystic duct, the direction of the cystic duct, and the spiral Heister valve (spiral folds in the cystic duct), the opening position of the confluence of the cystic duct and the common bile duct may change in various ways, and these changes may require the operator to repeatedly try to find the cystic duct with the guidewire. Summary of the invention

[0005] Technical solution: In order to solve the above-mentioned technical problems, the utility model provides a gallbladder duct intubation catheter with selectable direction, which specifically includes a circular connecting plug and a catheter head; one end of the circular connecting plug is movably connected to the catheter head, and the other end is provided with a through hole with an arc-shaped end, and multiple groups of openings are independently provided on the tube wall of the circular connecting plug on both sides of the through hole; the openings are inclined holes at a certain angle along the central axis of the circular connecting plug; wherein the circular connecting plug and the catheter head are both tube structures and after being connected, the two parts can rotate 360° in the horizontal direction along the plug-in position, and cannot move forward and backward along the central axis.

[0006] As an improvement, it also includes a groove and a protruding block; the groove is arranged at the other end of the arc-shaped end of the circular link plug-in; the protruding block is a structure that protrudes in the direction away from the inner axis of the circular link plug-in, and is installed at the end position outside the groove and away from the arc-shaped end.

[0007] As an improvement, it also includes an inner convex block; the inner convex block is a structure that protrudes toward the inner axis direction of the circular connecting plug-in and is arranged at the end of the catheter head at the plug-in position with the circular connecting plug-in.

[0008] As an improvement, the outer convex block and the inner convex block are adapted to each other, and when the circular connecting plug-in unit and the catheter head are plugged in, the inner convex block is adapted to be placed in the groove.

[0009] As an improvement, the depth of the groove is the same as the protruding height of the inner convex block.

[0010] As an improvement, the outer convex block and the inner convex block are made of elastic material, and are annular convex blocks symmetrical along the central axis of the cannula catheter or at least two convex blocks spaced apart.

[0011] As an improvement, the outer convex block and the inner convex block are made of elastic material, and are annular convex blocks symmetrical along the central axis of the cannula catheter or at least two convex blocks spaced apart.

[0012] As an improvement, the opening is formed at an angle of 10-90° along the central axis of the circular link plug-in and has a diameter of 0.6-0.9 mm.

[0013] As an improvement, the number of the openings is three, and the angles formed along the central axis of the circular link plug-in are 30°, 60°, 90° or 30°, 45°, 60°.

[0014] As an improvement, the circular connecting plug has a diameter of 1.5-2.0 mm, a length of 3-4 mm, and a vertical distance from the circular arc top to the side opening of 1-2 mm; the diameter of the catheter head is 1.5-2.0 mm.

[0015] Beneficial effects: Compared with the existing conventional device, the device proposed by the utility model is a catheter that can freely change direction. The catheter can change direction 360 degrees very flexibly, so as to find and anchor the opening position of the cystic duct, and finally successfully complete the key step of cystic duct cannulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The branching morphology of the existing cystic duct, where (1) a is the plane image of the right head branch, b is the plane image of the right foot branch, c is the plane image of the left branch, (2) stereoscopic image, cystic duct 11, common bile duct 12.

[0017] Figure 2 It is a structural schematic diagram of the intubation catheter of the utility model.

[0018] Figure 3 This is a schematic diagram of the structure of the utility model in which the opening angle is 45° in the positive direction.

[0019] Figure 4 This is a schematic diagram of the structure of the utility model with an opening angle of 90°.

[0020] Figure 5 This is a schematic diagram of the structure of the utility model in which the opening angle is 30° in the reverse direction.

[0021] Figure 6 It is a cross-sectional schematic diagram of the spaced bump structure of the utility model.

[0022] Figure 7 It is a cross-sectional schematic diagram of the annular protrusion of the utility model.

[0023] Figure 8 It is a structural schematic diagram of a comparative example.

[0024] In the figure: a circular connecting plug-in 1, a catheter head 2, a through hole 3, a groove 4, an outer convex block 5, an inner convex block 6, an opening 7, and a guide wire 8. DETAILED DESCRIPTION

[0025] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] A gallbladder duct intubation catheter with selectable direction, specifically comprising a circular link plug-in 1 and a catheter head 2; one end of the circular link plug-in 1 is movably connected to the catheter head 2, and the other end is provided with a through hole 3 with an arc-shaped end, and multiple groups of openings 7 are independently provided on the tube wall of the circular link plug-in 1 on both sides of the through hole 3; the openings 7 are inclined holes forming a certain angle along the central axis of the circular link plug-in 1; wherein the circular link plug-in 1 and the catheter head 2 are both tube structures and after being plugged in, the two parts can rotate 360° in the horizontal direction along the plug-in position, and cannot move forward and backward along the central axis.

[0027] It also includes a groove 4 and an outwardly protruding block 5; the groove 4 is arranged at the other end of the arc-shaped end of the circular link plug-in 1; the outwardly protruding block 5 is a structure protruding in a direction away from the inner axis of the circular link plug-in 1, and is installed at the end position outside the groove 4 and away from the arc-shaped end.

[0028] It also includes an inner convex block 6; the inner convex block 6 is a structure that protrudes toward the inner axis direction of the circular connecting plug-in 1 and is arranged at the end of the catheter head 2 at the plug-in position with the circular connecting plug-in 1.

[0029] The outer convex block 5 and the inner convex block 6 are adapted to each other. When the circular connecting plug 1 and the catheter head 2 are plugged in, the inner convex block 6 is adapted to be placed in the groove 4. The depth of the groove 4 is the same as the protruding height of the inner convex block 6.

[0030] The outer convex block 5 and the inner convex block 6 are made of elastic material, and are annular convex blocks or at least two convex blocks spaced apart and symmetrical along the central axis of the intubation catheter.

[0031] As a specific embodiment of the present invention, the outer convex block 5 and the inner convex block 6 are made of elastic material, and the outer convex block 5 and the inner convex block 6 are annular convex blocks symmetrical along the central axis of the intubation catheter or at least two convex blocks spaced apart. Figure 6 is a cross-sectional schematic diagram of a spaced bump structure, Figure 7 It is a cross-sectional schematic diagram of the annular protrusion.

[0032] The opening 7 is formed at an angle of 10-90° along the central axis of the circular link plug 1 and has a diameter of 0.6-0.9 mm. The opening 7 is provided in three positions and the angles formed along the central axis of the circular link plug 1 are 30°, 60°, 90° or 30°, 45°, 60°.

[0033] The circular connecting plug 1 has a diameter of 1.5-2 mm, a length of 3-4 mm, and a vertical distance from the circular arc top to the side opening of 1-2 mm; the catheter head 2 has a diameter of 1.5-2 mm.

[0034] Example

[0035] The device consists of two parts: a catheter head 2 and a circular linking device 1.

[0036] First, the head end of the circular catheter head 2 is designed to Figure 1 As shown in the figure, it can be smoothly buckled together with the circular link plug-in 1, so that the two parts cannot move forward and backward, but can rotate 360 ​​degrees in the horizontal direction.

[0037] Then, different directions / angles are designed on the side of the circular link plug 1. As a specific embodiment of the present invention, the openings are set at 30°, 60°, 90° in the forward direction and 30°, 45°, 60° in the reverse direction. Figure 3 , Figure 4 and Figure 5 In this way, the guide wire or the catheter can be rotated 360 degrees or simultaneously, so that the guide wire 8 can find the opening of the gallbladder duct 360 degrees in the horizontal direction and at different angles in both the positive and negative directions, thereby smoothly inserting the guide wire 8 into the gallbladder duct.

[0038] Finally, the front end of the circular link plug 1 is designed to be arc-shaped (with a through hole 3 in the middle to allow another guide wire 7 to move straight in and out at the same time), so that the inner wall of the bile duct and the inner wall of the cystic duct can be protected from scratches during the movement along the guide wire 7.

[0039] Comparative Example

[0040] CBD: common bile duct, CHD: common hepatic duct, CD: cystic duct, GB: gallbladder, blue arrow indicates guidewire, balloon-assisted cystic duct intubation technique is used, with balloon assistance, choledochoscopy (independent of duodenoscope), the internal details of bile duct and cystic duct can also be directly seen, guidewire can be inserted into the cystic duct under the guidance of choledochoscopy) and intraductal ultrasound [IDUS]. It can improve the success rate, but the auxiliary method is costly and time-consuming.

[0041] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A cystic duct intubation catheter with selectable direction, characterized in that: The invention comprises a circular link plug (1) and a catheter head (2); one end of the circular link plug (1) is movably connected to the catheter head (2), and the other end is provided with a through hole (3) with an arc-shaped end, and a plurality of groups of openings (7) are independently provided on the tube wall of the circular link plug (1) on both sides of the through hole (3); the openings (7) are inclined holes that form a certain angle along the central axis of the circular link plug (1); in The circular connecting plug-in (1) and the catheter head (2) are both tube structures and after being plugged in, the two parts can rotate 360 ​​degrees in the horizontal direction along the plug-in position, but cannot move forward and backward along the central axis.

2. The cystic duct catheter with selectable direction according to claim 1, characterized in that: It also comprises a groove (4) and an outwardly protruding block (5); the groove (4) is arranged at the other end of the arc-shaped end of the circular link plug-in (1); the outwardly protruding block (5) is a structure protruding in a direction away from the inner axis of the circular link plug-in (1), and is installed at an end position outside the groove (4) and away from the arc-shaped end.

3. The cystic duct catheter with selectable direction according to claim 2, characterized in that: It also includes an inner convex block (6); the inner convex block (6) is a structure that protrudes toward the inner axis direction of the circular link plug (1) and is arranged at the end of the catheter head (2) at the plug-in position with the circular link plug (1).

4. The direction-selectable gallbladder duct intubation catheter according to claim 2 or 3, characterized in that: The outer convex block (5) and the inner convex block (6) are adapted to each other. When the circular connecting plug-in unit (1) and the catheter head (2) are plugged in, the inner convex block (6) is adapted to be placed in the groove (4).

5. The direction-selectable gallbladder duct catheter according to claim 2 or 3, characterized in that: The depth of the groove (4) is the same as the protruding height of the inner convex block (6).

6. The direction-selectable gallbladder duct catheter according to claim 2 or 3, characterized in that: The outer convex block (5) and the inner convex block (6) are made of elastic material, and are annular convex blocks or at least two convex blocks spaced apart and symmetrical along the central axis of the intubation catheter.

7. The cystic duct catheter with selectable direction according to claim 1, characterized in that: The opening (7) is formed at an angle of 10-90° along the central axis of the circular link plug-in (1) and has a diameter of 0.6-0.9 mm.

8. The cystic duct catheter with selectable direction according to claim 1, characterized in that: The number of openings (7) is three, and the angles formed along the central axis of the circular link plug-in unit (1) are 30°, 60°, 90° or 30°, 45°, 60°.

9. The cystic duct catheter with selectable direction according to claim 1, characterized in that: The circular link plug (1) has a diameter of 1.5-2.0 mm, a length of 3-4 mm, and a vertical distance from the top of the circular arc to the side opening of 1-2 mm; The diameter of the catheter head (2) is 1.5-2.0 mm.

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