Sub-atmospheric Wound-care System with Flow Rate Monitoring
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Solution Overview
Problem
Conventional negative pressure wound care devices lack effective means to detect accelerated fluid outflow, leading to potential vascular leaks and increased susceptibility to patient infections, and are cumbersome, painful, and inefficient in intermittent suction mode.
Innovation Solution
The Sub-Atmospheric Wound-care (SAWS) system incorporates a flow rate meter for fluid removal measurement, a brushless vacuum motor, wall suction as a primary source, and an electronic-programmable vacuum regulator with alarms and sensors to prevent fluid over-removal, reduce pain, and enhance therapeutic efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional negative pressure wound care devices are used, then wound healing is accelerated and labor consumption is reduced, but false failure alarms occur and susceptibility to patient infections increases
Solution Approach 1:
The system incorporates a pressure sensor positioned proximate the wound that provides real-time feedback on actual negative pressure conditions. This feedback mechanism distinguishes between true system failures and normal pressure variations, eliminating false failure alarms while maintaining reliable infection prevention monitoring.
Solution Approach 2:
The invention replaces conventional mechanical pressure monitoring with an electronic pressure sensor system that directly measures negative pressure at the wound site. This substitution provides more accurate and reliable data, reducing false alarms while maintaining the therapeutic effectiveness of negative pressure wound therapy.
2Productivity
If conventional negative pressure wound care devices are used, then wound healing is accelerated, but patient infection susceptibility increases due to lack of fluid outflow detection
Solution Approach 1:
The flow rate meter provides continuous feedback on fluid removal from the wound, enabling real-time detection of accelerated fluid outflow that may indicate vascular leaks or infection risks. This feedback allows immediate intervention to prevent patient infections while maintaining the wound healing benefits of negative pressure therapy.
Solution Approach 2:
The system introduces a flow rate meter as an intermediary monitoring device between the wound and collection canister. This intermediary provides critical information about fluid dynamics that directly links therapeutic effectiveness with infection risk monitoring, enabling proactive patient safety management.
3Ease of operation
If cotton gauze dressings are used three times per day, then wound care is provided, but patient pain and nursing labor hours increase significantly
Solution Approach 1:
The negative pressure wound care device with integrated monitoring enables the dressing to effectively monitor and manage itself for extended periods. The system automatically detects fluid outflow and pressure changes, reducing the need for frequent manual interventions and thereby minimizing patient pain while maintaining adequate wound care.
Solution Approach 2:
The continuous operation of negative pressure therapy with real-time monitoring provides uninterrupted wound care over several days. This continuous action eliminates the repeated trauma of frequent dressing changes while maintaining therapeutic effectiveness and patient comfort through automated monitoring.
4Device complexity
If pressure sensors are positioned far from the wound, then system complexity is reduced, but measurement accuracy of negative pressure deteriorates
Solution Approach 1:
The pressure sensor acts as an intermediary measurement device positioned optimally near the wound site. This positioning provides accurate local pressure measurements that reflect actual wound conditions without excessive system complexity, as the sensor integrates seamlessly into the existing negative pressure wound care system architecture.
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 SAWS system reduces the risk of vascular leaks, minimizes patient discomfort, and improves wound healing by providing accurate fluid output monitoring, reducing nursing demands, and using wall suction to enhance patient satisfaction and therapeutic effectiveness.
Implementation Method 1
a regulated vacuum source configured to develop a negative pressure
Implementation Method 2
a flow rate meter configured to measure a flow rate of liquid removed from the wound
Implementation Method 3
a pressure regulating sensor configured to be located proximate the wound for directly measuring the negative pressure at the wound
Implementation Method 4
a porous dressing suitable to be sealed airtight
Data Source
AI summary
Methods and systems are provided for a sub-atmospheric wound-care (SAWS) system for treating an open wound. The SAWS system includes a regulated vacuum source for developing a negative pressure, a flow rate meter configured to measure a flow rate of liquid removed from the wound, a primary pressure regulating sensor located proximate the wound for directly measuring the negative pressure at the wound, a backup pressure regulating sensor located vacuum tube, a porous dressing suitable to be sealed airtight which is positioned within a wound interface chamber, a collection canister configured to collect said liquid removed from the wound, and an adapter configured to use wall suction a primary regulated vacuum source.