Airflow Patient Support Structure for Bed-Exit Monitoring
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Solution Overview
Problem
Current patient support systems fail to effectively reduce the risk of pressure sores and provide reliable bed-exit monitoring and patient weighing functions, which are crucial for patient safety and comfort.
Innovation Solution
The system incorporates a patient support structure with inflatable supports and a vapor-permeable top cover, featuring a channel for airflow and pressure sensors to monitor pressure changes, triggering alarms and calculating patient weight based on pressure differences, while also using an inflatable mat with pressure sensors to determine patient weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a patient support system uses traditional non-permeable materials, then it provides structural integrity, but it fails to effectively reduce the risk of pressure sores
Solution Approach 1:
The patent employs porous and permeable materials including foam layers with varying densities, vapor-permeable barriers, and air-flow channels that allow moisture and heat to pass through while providing pressure redistribution. These porous structures enable breathability and reduce moisture buildup, directly addressing pressure sore prevention while maintaining structural support.
Solution Approach 2:
The support system utilizes composite construction combining multiple materials with different properties: high-density foam for structural support, low-density foam for comfort and pressure distribution, vapor-permeable barriers for moisture management, and inflatable elements for dynamic adaptation. This composite approach resolves the contradiction by integrating both structural integrity and pressure reduction effectiveness.
2Reliability
If the support structure includes multiple inflatable supports with pressure sensors, then it provides accurate bed-exit monitoring, but it increases device complexity
Solution Approach 1:
The inflatable supports serve multiple functions simultaneously: they provide structural support, enable pressure distribution, facilitate bed-exit monitoring through integrated pressure sensors, and allow patient positioning adjustments. This multi-functionality reduces the need for separate components, thereby managing complexity while maintaining monitoring accuracy.
Solution Approach 2:
The patent integrates pressure sensors directly into the inflatable support structure, merging the monitoring function with the support function. This integration eliminates the need for separate sensor arrays and reduces overall system complexity while maintaining reliable bed-exit detection capabilities.
3Measurement precision
If the system uses an inflatable mat with pressure sensors, then it provides accurate patient weighing, but it increases device complexity
Solution Approach 1:
The inflatable mat serves dual purposes: it provides support during patient positioning and simultaneously functions as a weighing platform through integrated pressure sensors. This eliminates the need for separate weighing equipment, reducing overall system complexity while maintaining measurement precision.
Solution Approach 2:
The weighing function utilizes pneumatic pressure measurement through the inflatable mat structure. Pressure sensors detect weight by measuring air pressure changes within the sealed inflatable chambers, providing accurate weight measurement without mechanical contact points or complex load cell assemblies.
4Object-affected harmful factors
If the support structure includes vapor-impermeable barriers and vapor-permeable covers, then it manages moisture effectively, but it increases manufacturing complexity
Solution Approach 1:
The support system is divided into distinct functional layers: a vapor-impermeable barrier layer for moisture containment, a vapor-permeable cover for breathability, and intermediate foam layers for pressure distribution. This segmentation allows each layer to be manufactured separately using standard processes, then assembled through lamination or adhesive bonding, managing complexity while achieving effective moisture management.
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 reduces the risk of pressure sores by maintaining optimal support and pressure distribution, while providing predictive bed-exit alarms and accurate patient weight measurements, enhancing patient safety and caregiver intervention.
Implementation Method 1
An inflatable support may be disposed in the channel. An interior volume of the inflatable support may be fluidicly isolated from the channel
Implementation Method 2
A substantially vapor-permeable top cover may extend between upper aspects of the first longitudinally oriented sidewall and the second longitudinally oriented sidewall
Implementation Method 3
pressure sensors to monitor pressure changes, triggering alarms and calculating patient weight based on pressure differences
Implementation Method 4
a generally longitudinally oriented channel configured to receive airflow therethrough may be substantially defined by a lower surface of the top cover
Data Source
AI summary
Patient support systems are generally disclosed. An example patient support system may include a base; first and second longitudinally oriented sidewalls extending upward from lateral side portions of the base; a substantially vapor-impermeable barrier on the top surface of the base and on inwardly facing surfaces of the sidewalls; a substantially vapor-permeable top cover extending between the sidewalls such that a generally longitudinally oriented channel configured to receive airflow therethrough is substantially defined by a lower surface of the top cover, an upper surface of the barrier on the base, and inwardly facing surfaces of the barrier on the sidewalls; a supply conduit extending from an exterior air supply connector to an internal air supply opening within the channel; an air discharge opening within the channel; and an inflatable support disposed in the channel. The interior volume of the inflatable support may be fluidicly isolated from the channel.