Telescopic Surgical Drainage Device for Safe Bile Extraction
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Solution Overview
Problem
Traditional surgical drainage devices, such as the Kehr tube and Y-shaped devices, face challenges during removal from the body, leading to complications like biliary leaks, peritonitis, and stenosis due to their rigid structure and design, which requires excessive force and can cause injury to the bile duct structures.
Innovation Solution
A surgical drainage device with a telescopic and sliding 'T'-shaped design, where the second tubular body can slide within the first, allowing for easy insertion and decomposable structure to facilitate safe removal without causing trauma, maintaining the functionality of the traditional 'T' shape for bile drainage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional T-shaped drainage device with fixed structure is used, then effective bile drainage is achieved, but device extraction causes injury to bile duct structures due to excessive force required
Solution Approach 1:
The drainage device is divided into a first tubular body and a second tubular body that can slide relative to each other. During extraction, the second tubular body can be separated from the first, allowing the larger first tubular body to remain in place while only the smaller second tubular body needs to pass through the aperture, significantly reducing the extraction force required and preventing injury to bile duct structures.
Solution Approach 2:
The device transitions from a fixed rigid structure to a dynamic telescopic structure where the second tubular body can slide within the first tubular body. This dynamic configuration allows the device to maintain its T-shape for effective drainage during use, while enabling easy separation and extraction of the second tubular body to minimize trauma during removal.
2Adaptability or versatility
If a Y-shaped drainage device is used for intrahepatic bile drainage, then intrahepatic drainage is achieved, but the device cannot be introduced into the common extrahepatic duct and choledochus
Solution Approach 1:
The T-shaped drainage device with telescopic structure serves multiple functions: it can be effectively positioned in the common extrahepatic duct and choledochus for extrahepatic drainage, while the adjustable second tubular body can reach into intrahepatic ducts to provide intrahepatic drainage as well. This universal design replaces the need for separate Y-shaped devices, providing both extrahepatic and intrahepatic drainage capabilities through a single device configuration.
3Ease of operation
If the second tubular body is completely extracted from the first tubular body, then easy removal is achieved, but fluidic communication between the tubular bodies is lost
Solution Approach 1:
The second tubular body is designed to slide within the first tubular body rather than being completely extracted. This dynamic sliding mechanism allows the second tubular body to be partially withdrawn to reduce extraction force while maintaining sufficient engagement to preserve fluidic communication between the two tubular bodies, thus achieving both easy removal and maintained functionality.
Solution Approach 2:
The second tubular body is nested within the first tubular body in a telescopic arrangement. During extraction, the second tubular body can be pulled out to a controlled extent while remaining partially nested, allowing easy removal without complete disengagement that would disrupt fluidic communication. The nested structure ensures continuous fluid pathway is maintained during the extraction process.
Data Source
AI summary
Surgical drainage device (10) comprising a first tubular body (11) inside which a second tubular body (12) is partly inserted in a telescopic and sliding manner.