Pressurized Mattress System with Automatic Pressure Control
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Solution Overview
Problem
Patients on support structures for extended periods face discomfort and increased risk of pressure ulcers and nerve damage due to decreased blood circulation, as existing solutions require frequent manual adjustments to maintain adequate support and circulation.
Innovation Solution
A pressurized mattress system with inflatable air bladders and a controller that monitors interface pressure, automatically adjusting air pressure based on sensor data to redistribute pressure and maintain optimal comfort and circulation without user input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual patient repositioning is performed frequently to maintain comfort and circulation, then patient comfort and blood circulation are improved, but medical personnel workload and time consumption increase
Solution Approach 1:
The mattress system automatically monitors interface pressure through sensors and adjusts air bladder pressure without requiring medical personnel intervention. The controller continuously receives pressure data and autonomously inflates or deflates bladders to maintain optimal pressure distribution, enabling the system to serve itself rather than requiring external manual repositioning
Solution Approach 2:
The system incorporates interface pressure sensors that continuously monitor pressure distribution between the patient and mattress. This feedback is transmitted to the controller, which automatically adjusts air bladder pressure in response to detected pressure changes, creating a closed-loop control system that maintains optimal comfort and circulation conditions dynamically
2Ease of operation
If pressurized mattress systems with multiple air bladders are used to improve patient comfort and circulation, then patient comfort and blood circulation are improved, but system complexity increases
Solution Approach 1:
The mattress is divided into multiple independently controllable air bladders arranged in zones across different body regions. Each bladder can be individually inflated or deflated based on localized pressure requirements, allowing precise pressure management while maintaining overall system manageability through modular architecture
Solution Approach 2:
The single mattress system performs multiple functions simultaneously: it provides pressure distribution, prevents pressure ulcers, supports patient comfort, and aids blood circulation. The integrated controller manages all air bladders through a unified interface, consolidating multiple functions into one device rather than requiring separate systems for each function
3Stability of the object's composition
If stationary patients remain on the support structure for extended periods, then patient stability is maintained, but risk of pressure ulcers and nerve damage increases
Solution Approach 1:
The controller periodically adjusts air bladder pressure based on continuous interface pressure monitoring. When pressure sensors detect sustained high pressure in specific zones, the system automatically deflates affected bladders and inflates others, creating periodic pressure variations that prevent tissue damage while maintaining overall patient stability and position
Solution Approach 2:
The system dynamically changes the pressure parameter within air bladders in response to detected interface pressure conditions. By varying air pressure levels across different zones and time periods, the system adapts to patient needs and prevents harmful pressure accumulation without requiring patient movement or repositioning
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 system effectively reduces pressure points, enhances patient comfort, and aids in maintaining blood circulation by automatically adjusting air pressure in inflatable bladders, minimizing the risk of pressure ulcers and nerve damage.
Implementation Method 1
at least one zone having at least one inflatable air bladder... A source of pressurized air is provided... controls the flow of pressurized air to/from the at least one inflatable air bladder
Implementation Method 2
A plurality of interface pressure sensors is disposed on an upper surface of the at least one inflatable air bladder. Each of the plurality of interface pressure sensors measures an interface pressure at a discrete location
Data Source
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AI summary
A method for automatically varying the internal air pressure in at least one inflatable air bladder associated with at least one zone of a pressurized mattress system to achieve an optimal zone air pressure for a patient. The method includes a step of incrementally decreasing the zone air pressure of the at least one zone until more than a predetermined percentage or portion of the patient is directly supported by a substrate disposed below the at least one inflatable air bladder. The method then determines the appropriate increase in zone air pressure to achieve the optimal zone air pressure for the patient.