Rotating Medicinal Applicator for Wound Stagnation
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Solution Overview
Problem
Conventional wound therapy systems for pressure ulcers and chronic wounds face issues such as low medicinal chemical exchanges, stagnation, bacterial growth, and complications due to infrequent dressing changes, leading to prolonged healing times and adverse events like infection and ischemia.
Innovation Solution
A device that applies and extracts medicinal fluids and oxygen through a turbulent or rotating stream within a negative pressure envelope, allowing for constant and rapid chemical exchanges with adjustable dwell time, using a portable and lightweight applicator tip that communicates negative pressure and pressurized fluid to enhance wound healing without electronic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional negative pressure wound therapy systems are used with foam or gauze dressings changed 2-4 times per week, then wound healing is promoted through sub-atmospheric pressure application, but the frequency of dressing changes is insufficient to provide adequate fresh medicinal chemical exchanges, leading to stagnation and bacterial growth
Solution Approach 1:
The patent implements periodic action through pulsating negative pressure cycles that alternate between application and removal phases. The system applies negative pressure for a set duration (e.g., 5-10 minutes), then removes it for a shorter duration (e.g., 1-2 minutes), creating repeated cycles throughout the treatment session. This periodic action continuously refreshes medicinal chemicals at the wound site without requiring frequent full dressing changes, thereby increasing the rate of medicinal chemical exchanges while reducing the time loss associated with frequent dressing changes.
Solution Approach 2:
The patent achieves continuity of useful action by maintaining a sustained treatment session where multiple pulsating cycles occur back-to-back with minimal interruption. The system keeps the wound site under treatment conditions for an extended period (e.g., 30-60 minutes total treatment time), ensuring continuous beneficial effects on wound healing. This continuous action maximizes medicinal chemical exchange efficiency without the need to stop and change dressings frequently, thereby resolving the contradiction between exchange rate and time loss.
2Ease of operation
If infrequent dressing changes are performed to reduce patient pain and treatment disruption, then patient comfort is improved, but stagnation, bacterial growth, and complications such as infection and ischemia increase
Solution Approach 1:
The pulsating negative pressure cycles create periodic refreshment of the wound environment, alternating between suction phases that remove stagnant fluids and exudates, and release phases that allow fresh medicinal chemicals to contact the wound. This periodic action effectively reduces bacterial growth and infection risk by preventing stagnation, while maintaining patient comfort because the full dressing is not removed between cycles, avoiding repeated painful dressing changes.
Solution Approach 2:
By maintaining continuous treatment sessions with multiple pulsating cycles, the system ensures ongoing removal of harmful substances and continuous delivery of beneficial medicinal chemicals throughout the treatment period. This continuous action effectively combats bacterial growth and prevents complications like infection and ischemia, while the dressing remains in place throughout, preserving patient comfort and avoiding the disruption of frequent dressing changes.
3Reliability
If conventional vacuum pumps and drainage tubing systems are used for negative pressure wound therapy, then wound healing is achieved through fluid removal and pressure application, but the systems are complex, heavy, and require electrical power sources that reduce portability and ease of sanitization
Solution Approach 1:
The patent extracts and eliminates the complex electrical vacuum pump and drainage tubing components from the system, replacing them with a simplified manual or mechanical pump mechanism integrated directly into the applicator device. This extraction of unnecessary complex components maintains the core therapeutic function of negative pressure application while dramatically reducing system complexity, eliminating electrical power requirements, and improving portability. The simplified design also makes sanitization easier as there are fewer components to clean and maintain.
Solution Approach 2:
The patent merges the pump mechanism, pressure application system, and wound contact interface into a single integrated applicator device. Rather than using separate vacuum pumps, tubing, and dressings, the system combines these functions into one unified device that can be easily sanitized as a single unit. This merging eliminates the complexity of connecting and disconnecting multiple components, removes the need for electrical power sources, and maintains reliable wound healing treatment through the integrated negative pressure generation and application mechanism.
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 enables accelerated wound healing by maximizing fresh medicinal exchanges, reducing bacterial growth, and minimizing complications, while being convenient for home use and easy to sanitize, with the added benefit of preventing pressure ulcers and promoting oxygen delivery for enhanced tissue repair.
Implementation Method 1
They are also employed for the removal of fluids such as wound exudates, irrigation fluids, bodily fluids, and infectious material
Implementation Method 2
communicating a turbulent or rotating stream of medicinal fluid to the pressure envelope
Data Source
AI summary
A medicinal applicator system is configured to provide a rotating fluid stream or whirlpool for treating targeted tissues of a patient, such as wounds on the skin. The applicator tip configured with a distal end in which the rotating circulation of medicinal fluid operates to contact targeted tissues on the body of a patient for treatment. A negative air supply communicating with the applicator tip operates to evacuate fluid from the spinning whirlpool and transport it and contaminants therein to a waste container.