Orthopedic Cast Ventilation Cuff With Filtered Positive Airflow
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Solution Overview
Problem
Orthopedic casts often lead to complications such as cellulitis, necrotizing fasciitis, gangrene, toxic shock syndrome, skin necrosis, compartment syndrome, abscesses, and itching due to lack of air circulation, which can be exacerbated by exposure to contaminants and allergens.
Innovation Solution
An orthopedic cast ventilator using positive pressure and a manifold system to deliver purified air through a flexible air delivery cuff, which includes a primary and secondary air filter, to create improved airflow between the cast and the skin, optionally with medicament addition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air circulation is blocked in the cast-skin gap, then cast support and immobilization are maintained, but skin complications such as cellulitis, necrotizing fasciitis, gangrene, toxic shock syndrome, skin necrosis, compartment syndrome, and abscesses occur
Solution Approach 1:
The cast is divided into sealed sections by placing air-tight cuffs at both ends, creating distinct air compartments. This segmentation allows independent pressure control in each section, enabling maintenance of immobilization support while facilitating targeted air circulation to prevent skin complications through the controlled delivery of positive pressure air through the cast material.
Solution Approach 2:
A dual-lumen catheter system acts as an intermediary mechanism between the external air pump and the cast-internal environment. The first lumen delivers positive pressure air from the pump through the cast to the skin interface, while the second lumen provides a return path for air evacuation, enabling controlled air circulation without compromising cast integrity or support.
2Object-affected harmful factors
If traditional negative pressure vacuum systems are used to draw air through the cast, then air circulation is achieved, but the system complexity and risk of introducing environmental contaminants increase
Solution Approach 1:
Instead of using negative pressure vacuum systems that draw air through the cast, the invention inverts the approach by using positive pressure from an air pump to push air through the cast material. This reversal simplifies the system by eliminating complex vacuum mechanisms while maintaining effective air circulation, and reduces contamination risk by directing air flow from a controlled external source through the cast to the skin interface.
3Object-affected harmful factors
If blow dryer cooling settings are used to force air through the cast, then air circulation is achieved, but the method is impractical for continuous use and lacks controlled purification
Solution Approach 1:
The system employs an automated air pump connected to a power source that continuously delivers purified air through the cast without requiring manual operation. The air pump automatically maintains positive pressure to force air through the cast material and into the skin gap, enabling uninterrupted, hands-free operation that is practical for continuous use during cast wear, unlike manual blow dryer methods.
Solution Approach 2:
The air pump draws air through a filtration system that removes contaminants, allergens, and pathogens, delivering purified air through the cast. This creates a controlled, clean air environment between the cast and skin, eliminating exposure to environmental contaminants that would be present with unfiltered blow dryer air or ambient air from vacuum systems.
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
Reduces complications by providing clean air and medicament to the cast-skin gap, alleviating itching and minimizing exposure to pollutants, thus decreasing infection risk and improving skin health.
Implementation Method 1
The present invention utilizes positive pressure (rather than negative pressure) and purified air with a manifold system designed to fit into one opening of the cast to create increased and improved air flow
Implementation Method 2
The air pump draws air into the housing through an air intake aperture and passing through a primary air filter. The air pump pumps air out of the housing through a discharge port. The air is pumped out through the housing discharge port, through a length of tubing, through a secondary air filter, and into an air delivery cuff
Data Source
AI summary
An orthopedic cast ventilator apparatus and related methods are provided. The cast ventilator includes an air pump disposed within a housing connected to an air delivery cuff via tubing. The air pump draws air into the air mover through a primary air filter and through an air intake aperture. The air pump also pumps air out through a discharge port in the housing, through a length of tubing, through a secondary air filter, and into an air delivery cuff. The cleaned air fills two arms of the air delivery cuff and is forced out through cuff discharge ports.