Motor-Driven Ligation Retractor for Stable Thread Pulling
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Solution Overview
Problem
Existing ligation devices rely on manual operations, which can lead to irregularities and instability in ligating a ligation target with a thread.
Innovation Solution
A ligation device equipped with a body, holder, retractor, and drive unit, where the drive unit includes a first motor to move the retractor in the longitudinal direction, allowing for stable ligation by drawing the thread into the body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual operations are used to move the first extendable member, advancing member, second extendable member, and snaring member, then the device structure can be simpler, but the ligation operation stability deteriorates due to irregularities in manual operations
Solution Approach 1:
The patent replaces manual mechanical operations with an automated drive unit that controls the movement of extendable members and snaring members. The drive unit uses a motor to automatically position components, eliminating human operational irregularities and ensuring stable, repeatable ligation operations.
Solution Approach 2:
The device incorporates a self-contained drive unit that automatically performs the ligation sequence without requiring continuous manual intervention. The system controls its own operations through programmed movements of the extendable members and snaring members, achieving autonomous ligation functionality.
2Reliability
If a drive unit with motor is added to automate the retractor movement, then the ligation stability is improved, but the device complexity increases
Solution Approach 1:
The patent integrates the drive unit with the existing extendable member structure, combining the motor, retractor, and extendable member into a unified assembly. This merging approach allows the automated system to be incorporated without adding separate, independent components, thereby limiting the increase in overall device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device ensures stable ligation of the ligation target by automating the thread pulling process, enhancing operational consistency and reliability.
Implementation Method 1
The drive unit includes a first motor for moving the retractor in the longitudinal direction relative to the body
Data Source
AI summary
A ligation device includes: a body having a cylindrical shape and extending in a longitudinal direction; a holder disposed at one end of the body in the longitudinal direction; a retractor having a part accommodated inside the body; and a drive unit connected to an other end of the body in the longitudinal direction. The holder is configured to hold a ligation target. The part of the retractor is movable toward the other end of the body in the longitudinal direction to draw a thread into an interior of the body for ligating the ligation target held by the holder. The drive unit includes a first motor for moving the retractor in the longitudinal direction relative to the body.