CN-115054802-B - Locking device of drainage catheter and drainage catheter

CN115054802BCN 115054802 BCN115054802 BCN 115054802BCN-115054802-B

Abstract

The invention relates to a locking device of a drainage catheter and the drainage catheter, which comprises a drainage catheter seat, wherein the drainage catheter seat comprises a core rod, a locking ring is sleeved on the core rod and coaxially arranged with the core rod, and is suitable for clamping a locking wire by matching with the outer wall of the core rod when rotating relative to the core rod.

Inventors

LIU WENJING
LI MING
ZHU XIAOWEI

Assignees

苏州美创医疗科技有限公司
苏州美创医疗科技有限公司

Dates

Publication Date: 20260421
Application Date: 20220728
Priority Date: 20220728

Claims (5)

1. A locking device for a drainage catheter, comprising a drainage catheter holder (2), characterized in that the drainage catheter holder (2) comprises: the core rod (21) is arranged in a hollow mode, and an outlet (4) is arranged on the side wall of the core rod (21); The locking ring (22) is sleeved on the core bar (21) and is coaxially arranged with the core bar (21), a small hole (3) suitable for leading out the locking line (16) is formed in the locking ring (22), and the locking ring (22) is suitable for being matched with the outer wall of the core bar (21) to clamp the locking line (16) when rotating relative to the core bar (21); the inner wall of the locking ring (22) is provided with a groove (6) communicated with the small hole (3), and the transition part between the inner wall of the groove (6) and the inner wall of the locking ring (22) is provided with a round angle; the outer wall of the core bar (21) is provided with a lower surface (7) passing through the wire outlet (4), the distance from the lower surface (7) to the central axis of the core bar (21) is smaller than the radius of the core bar (21), and a gap is reserved between the lower surface (7) and the inner wall of the locking ring (22); Along the perimeter direction of the core bar (21), the lower surface (7) is symmetrical with respect to the outlet (4); The drainage catheter seat (2) further comprises a seat body (23), the seat body (23) is sleeved on the core rod (21) and is coaxially arranged with the core rod (21), and the locking ring (22) is coaxially and rotatably arranged on the seat body (23); The locking ring (22) is provided with a first blocking tooth (12), and one axial end of the seat body (23) is provided with a second blocking tooth (13) which is suitable for blocking the first blocking tooth (12) unidirectionally along the rotation direction of the locking ring (22).
2. The locking device of the drainage catheter according to claim 1, wherein a baffle ring (9) coaxial with the core rod (21) is annularly arranged on the side wall of the core rod (21), and two axial ends of the locking ring (22) are respectively abutted against the baffle ring (9) and the seat body (23).
3. The locking device of the drainage catheter according to claim 2, wherein a bump (10) is arranged on one side of the baffle ring (9) facing the locking ring (22), an arc-shaped groove (11) is arranged on one end of the locking ring (22) facing the baffle ring (9), the arc-shaped groove (11) is arranged around the axis of the locking ring (22), and the bump (10) is positioned in the arc-shaped groove (11) and slides in the arc-shaped groove (11) along the length direction of the arc-shaped groove (11).
4. A locking device for drainage catheters according to claim 3, characterized in that a stop gear is provided in the arcuate slot (11), which is adapted to stop the rotating locking ring (22) of the lug (10), the aperture (3) being exactly aligned with the outlet (4).
5. A drainage catheter comprising the locking device of any one of claims 1-4, further comprising: The drainage catheter comprises a drainage catheter (1), wherein one end of the drainage catheter (1) connected with a drainage catheter seat (2) is a drainage end, the other end of the drainage catheter seat is in a pigtail shape and is a pigtail curled end, and a side hole is arranged on the pigtail curled end of the drainage catheter (1) and used for drainage.

Description

Locking device of drainage catheter and drainage catheter Technical Field The invention relates to the technical field of medical drainage catheters, in particular to a locking device of a drainage catheter and the drainage catheter. Background The pigtail drainage tube is used for conducting drainage and intra-cavity perfusion or flushing in operations or guiding catheters to be placed into tissue effusion and purulent cavities such as chest, abdomen, pericardial cavities through imaging equipment such as B-ultrasonic imaging, X-ray imaging and CT imaging equipment, and has wide clinical application. The surface of the pigtail catheter is smooth, the development is clear under X-ray, the biocompatibility is good, the retention time is long, the inner cavity is large, the flow is large, the deformation and deterioration are not easy to occur, and the single-cavity common catheter used in the past is gradually replaced. The tail end of the pigtail drainage tube is curled to form a pigtail, and the curled pigtail can effectively prevent the catheter from falling out of the inlet, so that the pigtail drainage tube is separated from a body cavity, the displacement of the tube body can be prevented, and the occurrence of complications is reduced. The pigtail drainage tube with the locking wire can lock the tail end of the catheter in a curling way and adjust the curling radian, so that the pigtail drainage tube is more suitable for drainage of multiple operations, has excellent adaptability, and is not easy to fall off under the action of a patient due to the locking wire at the tail end. The present market pigtail drainage tube, for example, the "pigtail drainage tube with locking line system" proposed by the invention of the authorized bulletin number CN206837223U, is provided with one or more locking line fixing shafts extending outwards on the locking line connecting seat, when in use, after the locking radian of the pigtail curled end is adjusted, the pulling end of the locking line is wound on the locking line fixing shaft, and then the locking line fixing shaft is covered by a shell hinged on the outer wall of the locking line connecting seat, so as to avoid the locking line from being exposed. In the above locking wire system, if the locking wire wound on the locking wire fixing shaft is to be ensured not to slip, the locking wire needs to be wound for a plurality of turns, which results in a longer locking time. Disclosure of Invention Therefore, the invention aims to solve the technical problems of long locking time and inconvenient locking, thereby providing a locking device of a drainage catheter and the drainage catheter. A locking device for a drainage catheter, comprising a drainage catheter hub, wherein the drainage catheter hub comprises: The core rod is arranged in a hollow mode, and a wire outlet is arranged on the side wall of the core rod; the locking ring is sleeved on the core rod and is coaxially arranged with the core rod, a small hole suitable for leading out the locking wire is formed in the locking ring, and the locking ring is suitable for being matched with the outer wall of the core rod to clamp the locking wire when rotating relative to the core rod. Further, the inner wall of the locking ring is provided with a groove communicated with the small hole, and the transition part between the inner wall of the groove and the inner wall of the locking ring is provided with a round angle. Further, the outer wall of the core rod is provided with a cut-down surface passing through the wire outlet, the distance from the cut-down surface to the central axis of the core rod is smaller than the radius of the core rod, and a gap is reserved between the cut-down surface and the inner wall of the locking ring. Further, along the circumferential direction of the core rod, the reduced surface is symmetrical with respect to the outlet. Further, the drainage catheter seat further comprises a seat body, the seat body is sleeved on the core rod and is coaxially arranged with the core rod, and the locking ring is coaxially and rotatably arranged on the seat body. Furthermore, a baffle ring coaxial with the core rod is annularly arranged on the side wall of the core rod, and two axial ends of the locking ring are respectively propped against the baffle ring and the seat body. Further, a protruding block is arranged on one side, facing the locking ring, of the locking ring, an arc-shaped groove is formed in one end, facing the locking ring, of the locking ring, the arc-shaped groove is arranged around the axis of the locking ring, and the protruding block is located in the arc-shaped groove and slides in the length direction of the arc-shaped groove. Further, a stop gear is arranged in the arc-shaped groove, and when the locking ring which is suitable for stopping rotation of the protruding block is stopped, the small Kong Qiahao is aligned to the wire outlet. Further, a first blocking tooth is arranged o