Modular Wound Dressing Valve for Leak-Free Reduced Pressure Therapy
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Solution Overview
Problem
Conventional wound care systems for reduced pressure therapy often fail due to unnoticed leaks in the connection tubes between the suction port and the pump, leading to increased pressure in the wound space and ineffective therapy, particularly for patients with slightly to moderately exuding wounds.
Innovation Solution
A modular pump structure with a valve system that includes a film valve assigned directly to the covering device to manage gas exchange, allowing for detachable coupling with a suction device to maintain reduced pressure without the need for continuous tube connection, and an integrated indicator device to monitor pressure status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a connection tube is used to connect the suction port to the pump, then the patient can have mobility during therapy, but leaks occur in the connection tube leading to increased pressure in the wound space and ineffective therapy
Solution Approach 1:
The system is divided into separate modules: a wound dressing with integrated valve system that can function independently, and a portable suction device that can be detached when not needed. This segmentation eliminates the continuous tube connection that causes leaks while maintaining patient mobility.
Solution Approach 2:
The pump function is extracted from a fixed, cumbersome system into a small, portable device that can be temporarily attached to the wound dressing only when suction is needed, then removed to allow free patient movement without risking connection leaks.
2Reliability
If a pump is continuously connected to the wound space, then reduced pressure can be maintained, but the system becomes cumbersome and patient mobility is restricted
Solution Approach 1:
The valve system is pre-integrated into the wound dressing during manufacturing, with check valves already positioned to automatically maintain reduced pressure. This preliminary configuration eliminates the need for continuous pump connection, as the valves autonomously prevent pressure equalization.
Solution Approach 2:
The wound dressing's integrated valve system automatically maintains reduced pressure without requiring continuous external pump operation. The check valves self-regulate gas flow, allowing the patient to move freely while the system independently sustains the therapeutic pressure differential.
3Productivity
If connection tubes are used for gas evacuation, then gases can be removed from the wound space, but unnoticed leaks increase gas penetration into the wound space
Solution Approach 1:
Check valves act as intermediary components between the wound space and the external environment. These valves selectively permit gas evacuation during pump operation while automatically preventing ambient air infiltration when the pump is removed, eliminating the leak problem associated with continuous tube connections.
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
This solution ensures reliable reduced pressure maintenance over several hours, even with absorbent materials, enhancing patient mobility and comfort by eliminating the need for a cumbersome pump and reducing the risk of leakage, while providing discreet and efficient monitoring of pressure status.
Implementation Method 1
a valve system is assigned to the covering device, said valve system being operable on the one hand to suck gases out of the wound space and on the other hand to counter the penetration of gases into the wound space
Implementation Method 2
a suction device that can be operated to suck gases out of the wound space
Implementation Method 3
an absorbent material, such as for example a superabsorber, may be used in the region of the filling material
Data Source
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AI summary
A wound care system for reduced pressure therapy comprising a covering device that can be fixed to the skin surrounding a wound and serving to produce a closed wound space containing the wound, a valve system, designed on the one hand to suck gases out of the wound space and on the other hand to counter the penetration of gases into the wound space, being assigned to the covering device after fixing the covering device to the skin surrounding the wound, the valve system being able to be coupled detachably to a suction device that can be operated to suck gases out of the wound space.