Stent Delivery Handle Lock for Controlled Pseudocyst Deployment
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Solution Overview
Problem
Conventional catheters are inadequate for facilitating the perforation and stent installation at a perforated site during the treatment of pancreatic pseudocysts.
Innovation Solution
A stent delivery device with a housing, body part, handle part, and stoppers that allow controlled sliding and rotation for easy deployment of stents, utilizing an electrode to perforate tissue and controlled stopper releases for stent deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional catheter is used for stent installation, then the stent can be installed in the body, but the catheter is not suitable for perforation of pseudocyst and stent installation at perforated site
Solution Approach 1:
The patent combines multiple functions (perforation, stent delivery, and deployment control) into a single integrated catheter system. The catheter includes an electrode for perforation, a stent delivery mechanism, and a stopper system all in one device, eliminating the need for separate instruments and simplifying the surgical procedure.
Solution Approach 2:
The catheter is designed as a multi-functional device that can perform perforation through its electrode, deliver the stent through its internal mechanism, and control deployment through the stopper system. This universal design allows one device to replace multiple specialized instruments.
2Ease of operation
If the handle part is allowed to slide freely along the body part, then operation flexibility is improved, but uncontrolled movement may cause accidental stent deployment
Solution Approach 1:
The stopper is positioned in advance to prevent premature stent deployment. It proactively blocks the handle part's movement along the body part, counteracting any forces that might cause accidental deployment before the surgeon is ready to release the stent.
Solution Approach 2:
The system transitions from a static locked state (when the stopper is engaged) to a dynamic controlled state (when the stopper is released by rotation). This allows the handle part to be immobile during delivery but mobile during deployment, providing dynamic control over the stent release process.
3Reliability
If the stopper limits sliding movement of the handle part, then accidental deployment is prevented, but the handle part cannot be moved for stent deployment
Solution Approach 1:
The release mechanism operates in a different dimension (rotational movement around the body part's longitudinal axis) rather than along the longitudinal axis itself. By rotating the handle part circumferentially, the stopper disengages from its blocking position, allowing longitudinal movement for stent deployment while maintaining protection during delivery.
Solution Approach 2:
The stopper provides periodic blocking along the longitudinal direction, creating discrete positions where the handle part can be held secure. The rotational release mechanism transforms this periodic blocking into a controllable, on-demand release system where the surgeon can choose when to transition from blocked to unblocked state.
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
Facilitates easy and safe perforation of stomach or pancreas walls and controlled deployment of stents, eliminating the need for separate safety devices.
Implementation Method 1
a conductive member coupled to the outer circumferential surface of the tip part in order to transfer the current applied to the electrode
Data Source
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AI summary
Disclosed herein is a stent delivery device. The stent delivery device includes: a housing configured such that a hollow is formed in the longitudinal direction thereof; a body part coupled to one side of the housing, and having a predetermined length; and a handle part coupled through the body part so that it can slide and move along the longitudinal direction of the body part. A stopper configured to limit the sliding movement of the handle part is formed on a portion of the outer circumferential surface of the body part. When the handle part is rotated by a predetermined angle along the circumferential direction of the outer circumferential surface, the limitation of movement applied by the stopper is released, so that the sliding movement of the handle part is enabled.