Medical Operation Device Wire Position Control
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Solution Overview
Problem
Existing medical devices used to treat intravenous thrombi face issues with unintended displacement of filters due to sliding forces and blood flow, leading to ineffective thrombus collection, especially in larger blood vessels.
Innovation Solution
A wire position adjustment device that includes rotating rollers with a rubber surface to apply a moving force to the wire, limiting its movement and maintaining the filter's position within the blood vessel, combined with a movement detection unit to adjust the wire's position relative to the housing, ensuring accurate placement and preventing filter displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the wire extending from the filter is left loose to allow insertion and removal of the thrombus crushing device, then the ease of operation is improved, but the filter position stability deteriorates due to sliding forces causing unintended displacement
Solution Approach 1:
A clamping mechanism is introduced as an intermediary device that temporarily secures the wire to the housing during the procedure. This mediator allows the wire to be fixed in position when needed while still permitting controlled movement for device insertion and removal, resolving the contradiction between operational ease and position stability
2Stability of the object's composition
If the wire is firmly secured to prevent movement, then the filter position stability is improved, but the ease of operation deteriorates as the wire cannot move freely during thrombus crushing device insertion and removal
Solution Approach 1:
The clamping mechanism is designed to be dynamically adjustable, transitioning between clamped and released states. This dynamic capability allows the system to adapt its wire restraint level based on operational requirements, maintaining stability when needed while enabling movement during device manipulation
3Device complexity
If the filter is secured to the blood vessel wall using only its radial expansion force, then the device complexity is minimized, but the reliability deteriorates in large blood vessels where the filter can easily move to the heart side due to flow force
Solution Approach 1:
The housing and clamping mechanism serve as an external intermediary support system that supplements the filter's radial expansion force. This additional securing mechanism provides enhanced reliability in large blood vessels without significantly increasing the complexity of the filter itself, as the clamping function is integrated into the external housing structure
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 solution effectively maintains the filter's position and shape within the blood vessel, preventing unintended movement and ensuring effective thrombus collection, even in larger vessels, by applying a controlled force and adjusting for movement detected by the system.
Implementation Method 1
rotating rollers with a rubber surface to apply a moving force to the wire
Data Source
AI summary
An operation device configured to be joined with a proximal portion of a treatment device having a lumen through which a wire extending from an indwelling unit indwelling in a living body lumen to the outside of the body, and includes: a housing including a joining portion to which the treatment device can be joined; and an action unit that is disposed on the proximal side of the joining portion, and the action unit is brought into contact with the wire extending from the treatment device, to apply, to the wire, a moving force for the wire to move in the longitudinal axis direction.