Medical Access Device Anchoring via Collapsible Distal End
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Solution Overview
Problem
Medical access devices and sheaths often face challenges in maintaining secure placement within the body during procedures, as they may move or become unintentionally dislodged, necessitating a solution to enhance securement.
Innovation Solution
A medical device comprising an elongate member with a collapsible and expandable distal end portion and a sleeve that helps retain the end portion in a collapsed configuration for secure placement, allowing the device to be locked in position via frictional coupling, facilitating stable anchoring within the body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the access device is made simple and small for easy insertion, then ease of operation is improved, but the device lacks sufficient anchoring features to prevent dislodgment
Solution Approach 1:
The distal end portion of the elongate member is designed to dynamically change configuration between a first configuration during insertion and a second configuration for anchoring. This dynamic transformation allows the device to be simple during insertion but provide robust anchoring features when deployed, resolving the contradiction between ease of insertion and securement stability.
2Reliability
If the distal end portion is expanded to provide anchoring features, then securement stability is improved, but the device size increases making insertion more difficult
Solution Approach 1:
The distal end portion is nested within a delivery catheter during insertion, allowing the device to maintain a compact profile for easy insertion. Once positioned, the distal end portion is deployed from the catheter to expand and provide anchoring features, thus resolving the contradiction between compact size for insertion and expanded size for securement.
3Reliability
If the access device includes anchoring features to prevent dislodgment, then securement stability is improved, but the device complexity increases
Solution Approach 1:
The anchoring features are implemented through a dynamic configuration change of the distal end portion rather than permanent complex structures. The distal end portion transforms from a simple inserted state to an anchored state, providing securement stability without requiring permanently complex anchoring mechanisms, thus resolving the contradiction between securement stability and 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 effectively secures the access device in place, reducing the likelihood of dislodgment and enabling the use of secondary medical devices through its lumen for additional procedures.
Implementation Method 1
The second end portion is biased to its second configuration
Implementation Method 2
The second end portion is biased to its second configuration
Implementation Method 3
The sleeve is configured to engage the second end portion of the elongate member to help retain the second end portion of the elongate member in its first configuration
Data Source
AI summary
According to an aspect, a medical device includes an elongate member and a sleeve. The elongate member defines a lumen and has a first end portion and a second end portion. The second end portion has a first configuration and a second configuration. The second end portion has a first size when the second end portion is in its first configuration and a second size when the second end portion is in its second configuration. The first size is smaller than the second size. The second end portion is biased to its second configuration. The sleeve defines a lumen extending from a first end portion of the sleeve to a second end portion of the sleeve.