Pressure Ulcer Risk Mapping via Accumulated Exposure
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Solution Overview
Problem
Existing pressure ulcer risk mapping systems fail to accurately predict tissue exposure to elevated pressure over prolonged periods, leading to inaccurate patient repositioning during surgery and potential development of pressure ulcers, due to instantaneous pressure maps and complex risk category displays that require extensive training to interpret.
Innovation Solution
A method for continuously monitoring pressure ulcer risk using a pressure sensing device to generate instantaneous pressure maps, acquiring a body position model, determining accumulated risk, and comparing current to previous positions to update pressure ulcer risk maps, allowing for clear and concise visualization of tissue exposure to pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If instantaneous pressure maps are used to monitor tissue exposure, then real-time pressure data is available, but the ability to determine prolonged pressure impact is lost
Solution Approach 1:
The system performs preliminary integration of pressure data over time to calculate accumulated pressure exposure before displaying risk information. This allows real-time monitoring while maintaining information about prolonged pressure impact by pre-processing the data to show cumulative risk levels that incorporate historical pressure exposure.
2Loss of information
If multiple pressure ulcer risk categories are displayed simultaneously, then comprehensive risk information is provided, but medical personnel require extensive training to interpret
Solution Approach 1:
The system extracts and highlights only the most critical risk information from multiple categories, presenting it in a simplified format. Instead of displaying all risk categories simultaneously requiring extensive interpretation, the system identifies and presents the primary risk factors and recommended actions in a more accessible manner.
Solution Approach 2:
The system uses color-coded visual indicators to represent different risk levels, allowing medical personnel to quickly assess pressure ulcer risk without extensive training. Different colors correspond to different risk categories, enabling intuitive interpretation of comprehensive risk information through visual cues rather than complex data analysis.
3Ease of operation
If PUR map is reset after patient repositioning, then the map shows current pressure distribution, but historical pressure exposure information is lost
Solution Approach 1:
The system adds a temporal dimension to the pressure ulcer risk map by maintaining separate risk accumulation data that persists across repositioning events. While the display shows current pressure distribution for ease of operation, the system preserves historical pressure exposure information in an additional data layer that can be accessed to understand cumulative risk over time.
4Measurement precision
If patient repositioning is delayed due to complex map interpretation, then accurate risk assessment is maintained, but surgical time and costs increase
Solution Approach 1:
The system performs preliminary risk assessment and highlights critical risk areas before medical personnel need to make repositioning decisions. By pre-processing and presenting the most important risk information in an easily interpretable format, the system maintains measurement precision while reducing the time required for decision-making and patient repositioning during surgery.
Data Source
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AI summary
A method is provided for continuously monitoring pressure ulcer risk for a patient positioned on a support surface. The support surface has an associated pressure sensing device for sensing instantaneous pressure at the support surface. The method includes acquiring pressure data from the pressure sensing device to generate a two-dimensional instantaneous pressure (IP) map indicative of instantaneous pressure at locations of the support surface. The method further includes acquiring a body position model using the two-dimensional IP map, where the body position model includes body parts that are respectively mapped to locations on a pressure ulcer risk map. An accumulated risk is determined in associated with each body part. The pressure ulcer risk map is displayed in accordance with the accumulated risk. Further, a current body position model is compared to a previous body position model to detect a position change of the patient on the support surface.