A choledochoscope capable of being fixed at any position
By designing a gradient expansion structure and a gentle expansion method for the expansion components, the problems of low treatment efficiency and patient discomfort caused by the small diameter of the cholangioscope were solved, achieving more efficient diagnostic and treatment results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 宁海县第一医院
- Filing Date
- 2025-03-10
- Publication Date
- 2026-07-17
AI Technical Summary
Existing cholangioscopes have too small an aperture, which restricts their movement during treatment, affecting treatment efficiency and increasing patient discomfort.
A cholangioscope that can be fixed in any position was designed. It uses an expansion component including first and second expansion elements, and achieves gradient expansion by means of expansion medium flow. Combined with an elastic pleated part and a one-way valve body, it ensures that the expansion process is gentle and precise.
It improves the stability of the cholangioscope in the bile duct and the efficiency of diagnosis and treatment, reduces patient discomfort, and the multi-layered structure of the expansion component adapts to different scenarios. The gentle expansion process reduces pressure on the bile duct.
Smart Images
Figure CN224505412U_ABST
Abstract
Claims
1. A positionally fixable choledochoscope, characterized by: The device includes an operating body, a hose, and a probe. The operating body and the first end of the hose are connected. The probe is adapted to enter the hose from the operating body. A travel channel is provided inside the hose, which is adapted to accommodate the probe. An expansion assembly is provided near the second end of the hose. The expansion assembly includes a first expansion member and a second expansion member. The first expansion member and the second expansion member are arranged radially along the hose. A first connecting channel is provided between the first expansion member and the second expansion member, which is adapted to allow the expansion medium inside the first expansion member and the second expansion member to circulate with each other.
2. A positionally adjustable cholangioscope as in claim 1, wherein: The second expansion member covers the outer surface of the first expansion member. An elastic pleat is provided on the outer surface of the first expansion member. The first connecting channel is provided on the elastic pleat. The elastic pleat is adapted to fold or unfold with the expansion and contraction of the first expansion member. When the elastic pleat is folded, it is adapted to block the first connecting channel. When the elastic pleat is unfolded, it is adapted to open the first connecting channel.
3. A positionally adjustable cholangioscope as in claim 2, wherein: A one-way valve body is provided on the outer surface of the first expansion member. The one-way valve is adapted to connect the first expansion member and the second expansion member, and the one-way valve is adapted to restrict the flow of the expansion medium in the first expansion member to the second expansion member.
4. A positionally adjustable cholangioscope as in claim 3, wherein: The main structure of the one-way valve body is elastic, and the elastic modulus of the one-way valve body is greater than the elastic modulus of the elastic pleats. When the first expansion member contracts, the one-way valve body is adapted to compress the elastic pleats to enhance the degree of folding and blocking of the first connecting channel by the elastic pleats.
5. A positionally adjustable cholangioscope as defined in claim 3, wherein: The one-way valve body is integrally formed on the outer surface of the first expansion member; the one-way valve body is a one-way diaphragm valve.
6. A positionally adjustable cholangioscope as defined in claim 2, wherein: The first connecting channel is provided with a low-permeability structure so that a pressure difference is formed between the first expansion member and the second expansion member during expansion.
7. A positionally adjustable cholangioscope as defined in claim 1, wherein: The distance between the side of the second expansion member closest to the second end and the second end is greater than the distance between the side of the first expansion member closest to the second end and the second end.
8. A positionally adjustable cholangioscope as defined in claim 1, wherein: The number of the second expansion members is multiple, and the second expansion members are distributed at equal intervals along the circumference of the first expansion member on the outer surface of the first expansion member.
9. A positionally adjustable cholangioscope as in claim 1, wherein: The hardness of the first expansion member is greater than that of the second expansion member; the wall thickness of the first expansion member is greater than that of the second expansion member; and the maximum expansion volume of the first expansion member is greater than that of the second expansion member.
10. A positionally adjustable cholangioscope as defined in claim 1, wherein: One side of the hose protrudes outward and is integrally formed with an airflow channel. The distance between the airflow channel and the travel channel is less than the outer wall thickness of the hose.