Vacuum Wound Dressing with Pillar Structures for Uniform Compression
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Solution Overview
Problem
Existing wound dressings for post-operative swelling and blood loss are often bulky, cumbersome, and require frequent disposal, with prior solutions like bead-filled caps not providing uniform pressure and necessitating re-adjustment.
Innovation Solution
A sealed enclosure with pillar-like structures and a vacuum system that reduces the distance between pillars upon air evacuation, providing controlled pressure and uniform application, integrated with a frame for secure attachment and adjustable sizing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bandages are used to minimize post-operative swelling or control blood loss, then the wound can be protected and pressure applied, but the bandage becomes bulky and cumbersome
Solution Approach 1:
The invention uses a flexible bandage made of thin film material that can be conformably wrapped around body parts. The bandage incorporates evacuated compartments that create negative pressure to apply compression force, eliminating the need for bulky traditional bandages while maintaining effectiveness in minimizing swelling and controlling blood loss.
Solution Approach 2:
The bandage utilizes pneumatic principles by incorporating evacuated (vacuumed) compartments that create negative pressure. This pneumatic mechanism allows the thin film bandage to exert controlled compression force on the wound area, providing reliable swelling control and blood loss management without requiring substantial material volume.
2Reliability
If traditional bandages are used for head injuries, then some wound protection is provided, but most of the bandage does not come into contact with the wound and must be frequently disposed of
Solution Approach 1:
The bandage design applies local quality by concentrating the therapeutic action (evacuated compartments) directly at the wound site. The compartments are positioned to contact and apply pressure specifically where needed, rather than having most of the bandage material distributed away from the wound. This localized approach maintains wound protection while eliminating unnecessary material waste.
3Reliability
If bead-filled caps are used for post-operative head dressing, then swelling can be minimized, but the structures require re-adjustment and do not provide uniform pressure
Solution Approach 1:
The invention replaces rigid bead-filled compartments with flexible thin film compartments that can conform to the contours of the head and wound area. This flexibility ensures uniform distribution of compression force across the entire bandage surface, eliminating pressure irregularities associated with bead-filled designs while maintaining swelling control effectiveness.
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 minimizes post-operative swelling and bleeding by applying consistent pressure, reducing the dressing's bulk and frequency of disposal, while allowing for easy adjustment and secure fitting.
Implementation Method 1
means for evacuating air from the at least one compartment
Implementation Method 2
the evacuation of air from the at least one compartment causes a reduction in the distance between at least two of the pillar-like structures... resulting in the exertion of pressure by the dressing to the wound
Data Source
Figure 1~2
Figure 3a~3b
Figure 4
AI summary
A wound dressing comprising a sealed enclosure having at least one compartment; a plurality of spaced apart pillar-like structures positioned within the at least one compartment; and means for evacuating air from the at least one compartment, wherein the evacuation of air from the at least one compartment causes a reduction in the distance between at least two of the pillar-like structures.