Elastic Spacer Dressing for Dynamic Wound Pressure
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Solution Overview
Problem
Existing dressings lack the ability to dynamically adjust pressure applied to a patient's wound over time without requiring a new dressing, and there is a need for immediate pressure adjustment at the time of initial application.
Innovation Solution
A dressing with longitudinally spaced substrates and an elastic spacer that can be adjusted from a first length to a second length, using a triggering element to maintain the spacer at the longer length and prevent it from returning to the original length, allowing sequential reduction in length to apply increasing pressure to the wound.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a dressing is applied to a wound, then the wound receives initial pressure, but the pressure cannot be adjusted over time without replacing the dressing
Solution Approach 1:
The elastic spacer is designed to be dynamically adjustable between a first length (when contracted) and a second length (when extended), allowing the pressure applied to the wound to be adjusted over time. The spacer can be extended by inserting a triggering element and contracted by removing it, enabling dynamic pressure modification without replacing the entire dressing.
Solution Approach 2:
A triggering element serves as an intermediary component that mediates the adjustment of the elastic spacer. When inserted, it forces the spacer to extend to a second length, applying additional pressure. When removed, the spacer contracts to a first length, reducing pressure. This intermediary mechanism enables easy pressure adjustment without complex systems.
2Force
If the elastic spacer is extended to apply more pressure, then the pressure force increases, but the spacer naturally wants to return to its original shorter length
Solution Approach 1:
The triggering element applies a preliminary counteracting force to the elastic spacer's natural contraction tendency. By inserting the triggering element, the spacer is forced to extend and maintain its extended length against its elastic recovery force. This preliminary anti-action stabilizes the spacer in the extended position until the triggering element is deliberately removed.
3Reliability
If a triggering element is used to maintain the spacer at extended length, then pressure can be maintained, but the triggering element must be securely attached to prevent premature detachment
Solution Approach 1:
The triggering element is designed as a separate, removable component that can be easily inserted and extracted from the elastic spacer. This extraction-based approach simplifies the attachment mechanism - the triggering element simply needs to fit within the spacer's lumen or attach to its surface, without requiring complex locking mechanisms. The simplicity of insertion and removal maintains reliability while minimizing 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
Enables the application of a predetermined and adjustable amount of longitudinal force to a patient target site, allowing for dynamic pressure adjustment without replacing the dressing, facilitating wound closure and tension redistribution.
Implementation Method 1
An elastic spacer longitudinally extends between the first and the second substrates. The elastic spacer is biased to a first length. The elastic spacer is configured to be selectively moved between the first length and a second length.
Data Source
AI summary
A dressing for applying pressure to a patient target site is provided. The dressing includes an elastic spacer longitudinally extending between first and second substrates. The elastic spacer is configured to be selectively moved between the first length and a second length. The second length is longer than the first length. A triggering element, when present, selectively maintains the elastic spacer at the second length and selectively prevents the elastic spacer from moving toward the first length. Portions of the triggering element are sequentially removable such that as each portion of the triggering element is removed, the elastic spacer sequentially moves from the second length toward the first length. The sequential movement of the elastic spacer from the second length toward the first length responsively urges the first and second substrates longitudinally toward one another to apply a predetermined amount of longitudinal force to the patient target site.