Wound Dressing Connector with Hydrophobic Filter Pressure Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current negative-pressure therapy systems face challenges in accurately detecting pressure at tissue sites due to ingress of wound fluids into pressure-detection conduits, which can lead to clogging and inaccurate pressure readings.
Innovation Solution
A dressing interface with a hydrophobic filter, such as PTFE-coated woven fiberglass, is used to seal the pressure-detection chamber, preventing liquid ingress and ensuring accurate pressure monitoring by encapsulating the filter edges with UV-curable adhesive to form a semi-rigid structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pressure-detection conduits are exposed to wound fluids for monitoring, then pressure detection function is enabled, but wound fluids ingress into conduits causing clogging and inaccurate readings
Solution Approach 1:
A hydrophobic filter membrane is introduced as an intermediary component between the wound fluid environment and the pressure-detection conduit. The membrane allows water vapor and pressure changes to pass through while blocking liquid wound fluids, enabling pressure detection without direct exposure to clogging substances
Solution Approach 2:
A thin hydrophobic filter membrane is used to seal the pressure-detection chamber. This flexible film maintains pressure sensitivity while providing a barrier against liquid ingress, solving the contradiction between enabling pressure detection and preventing fluid contamination
2Ease of manufacture
If filter edges are left exposed for assembly simplicity, then manufacturing ease is improved, but liquid seepage into pressure-detection conduit occurs
Solution Approach 1:
Adhesive is applied locally at the critical edges of the filter membrane where liquid ingress would occur, rather than covering the entire filter or requiring complex sealing structures. This localized treatment prevents seepage while maintaining manufacturing simplicity
Solution Approach 2:
The filter assembly combines the hydrophobic filter membrane with adhesive material to create a composite structure. The adhesive encapsulates the filter edges, providing an additional barrier against liquid seepage while maintaining the overall simplicity of the assembly process
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 prevents wound fluids from entering the pressure-detection conduits, maintaining the integrity of pressure sensors and ensuring accurate and stable pressure readings over time, as demonstrated by comparative testing.
Implementation Method 1
A pressure-detection chamber may be fluidly coupled to the pressure-detection port and have an orifice closed by a liquid-air separator such as, for example, a hydrophobic filter to limit the flow of liquids into the pressure-detection chamber.
Implementation Method 2
The liquid-air separator may be bonded in place and sealed with a primary and/or secondary application of an adhesive such as, for example, a UV curable adhesive, that encapsulates the edges of the filter
Data Source
AI summary
A new dressing interface such as, for example, a connection pad that includes pressure monitoring at the tissue site is disclosed wherein pressure-detection conduits or lumens are protected from the ingress of wound fluids and exudates by a chamber sealed with a liquid-air separator such as, a hydrophobic filter, positioned within the pad. The liquid-air separator may be bonded in place and sealed with a primary and/or secondary application of an adhesive such as, for example, a UV curable adhesive, that encapsulates the edges of the filter to minimize the amount of liquid from the tissue site seeping into the pressure-detection conduit.