Manual Suction Apparatus for Portable Wound Therapy
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Solution Overview
Problem
Current negative pressure wound therapy (NPWT) systems are bulky, expensive, and limit patient mobility due to the need for large, electrically driven mechanical pumps.
Innovation Solution
A portable tissue therapy device that uses a self-created reduced pressure system, comprising a sealant layer and a non-electrically powered suction apparatus, to apply therapeutic reduced pressure to a wound without the need for external power sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrically driven mechanical pumps are used to apply negative pressure, then effective wound drainage and therapy are achieved, but device portability and patient mobility are limited
Solution Approach 1:
The patent replaces electrically driven mechanical pumps with a manually operated pump mechanism. The manual pump uses a plunger and cylinder arrangement where the user directly applies mechanical force to generate negative pressure, eliminating the need for electrical motors and power sources while maintaining therapeutic suction capability.
Solution Approach 2:
The device enables the patient or caregiver to self-operate the suction mechanism through manual pumping action. The system is designed to be self-contained with no external power requirements, allowing the user to control and maintain negative pressure therapy independently without relying on electrical infrastructure.
2Force
If large mechanical pumps are used, then sufficient suction force is generated, but device size and cost increase
Solution Approach 1:
The patent employs a flexible membrane or diaphragm as the pumping mechanism instead of rigid mechanical components. The flexible element can be compressed and released by hand to generate suction, providing sufficient force while maintaining a compact, lightweight form factor that is portable and affordable.
3Stability of the object's composition
If electrically powered systems are used, then consistent negative pressure is maintained, but device complexity and power requirements increase
Solution Approach 1:
The patent replaces complex electrical control systems with a simple manual pumping mechanism. The user maintains negative pressure through repeated manual pump operations, eliminating the need for motors, power supplies, electronic controls, and associated complexity while achieving stable therapeutic pressure levels.
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 device allows for increased patient mobility while providing effective wound therapy by self-maintaining reduced pressure levels between 0 and 760 mm Hg, promoting wound healing through exudate removal and tissue perfusion.
Implementation Method 1
self-created reduced pressure by forcefully expanding a volume of air molecules enclosed in the sealed enclosure
Implementation Method 2
reducing the level of pressure in a volume of air located under the sealant layer by engaging the suction apparatus, wherein the suction apparatus self-creates the reduction in pressure by forcefully expanding the volume of air
Data Source
Figure 1A~1B
Figure 2~3
Figure 4
AI summary
Described generally herein are tissue therapy devices, which may comprise a sealant layer and a suction apparatus. The sealant layer functions so as to create a sealed enclosure between it and the surface of a patient by forming, preferably, an airtight seal around an area of tissue that requires negative pressure therapy. The tissue therapy device may comprise a suction apparatus. The suction apparatus is typically in fluid communication with the sealant layer and functions so as to reduce the amount of pressure present underneath the sealant layer. The reduced pressure is self-created by the suction apparatus. Together the sealant layer and the suction apparatus preferably create a closed reduced pressure therapy system. Preferably, the pressure under the sealant layer is reduced by expanding the volume of the enclosure space and thereby decreasing the density of the air molecules under the sealant layer.