Adaptive Air Bladder Pressure Control to Reduce Patient Migration
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Solution Overview
Problem
Patient-support apparatuses, such as hospital beds, face challenges in minimizing patient migration towards the foot end, which requires frequent repositioning by caregivers, and existing systems lack efficient adaptive mechanisms to optimize patient comfort and mobility.
Innovation Solution
A patient-support apparatus equipped with a controller, pressure sensors, and a manifold system that adjusts air pressures in inflatable bladders based on patient-specific profiles, calculating target pressures to minimize migration and optimize comfort, using a processor to iteratively update profiles and adjust bladder pressures in response to actual patient outcomes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If caregivers manually reposition patients on patient-support apparatuses, then patient migration toward the foot end is corrected, but caregiver workload increases and patient comfort may be compromised due to frequent manual interventions
Solution Approach 1:
The patient-support apparatus automatically detects patient migration through pressure sensors and adjusts bladder pressures to reposition the patient without caregiver intervention. The system serves itself by monitoring patient position and autonomously modifying support characteristics to prevent excessive migration toward the foot end
Solution Approach 2:
The system continuously monitors patient position via pressure sensors distributed across the support surface and uses this feedback to dynamically adjust bladder pressures. The controller processes sensor data and modifies operating parameters in real-time to maintain optimal patient positioning and prevent excessive migration
2Adaptability or versatility
If fixed pressure profiles are used in patient-support apparatuses, then system complexity is reduced, but patient comfort and migration prevention are compromised due to inability to adapt to individual patient needs
Solution Approach 1:
The system dynamically changes pressure parameters in different bladder zones based on detected patient characteristics and migration patterns. The controller adjusts pressure magnitude and distribution across multiple bladders to optimize patient comfort and prevent migration, adapting to individual patient needs rather than using fixed profiles
Solution Approach 2:
The support surface is divided into multiple independent bladder zones with individual pressure control. This segmentation allows different pressure profiles to be applied to different body regions simultaneously, enabling precise adaptation to patient anatomy and migration tendencies while maintaining manageable system complexity through modular control
3Reliability
If frequent manual repositioning is performed by caregivers, then patient migration is corrected, but patient disturbance increases and treatment continuity is disrupted
Solution Approach 1:
The system proactively adjusts bladder pressures to prevent excessive migration before it occurs, rather than reacting to significant position changes. By continuously monitoring and making small preventive adjustments, the system maintains reliable patient positioning without causing the disturbance associated with frequent manual repositioning interventions
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 patient migration, enhances comfort, and optimizes mobility by dynamically adjusting pressure settings, thereby reducing caregiver workload and improving patient care outcomes.
Implementation Method 1
The plurality of pressure sensors are in fluid communication with the plurality of bladders and produce pressure signals indicative of air pressure within each of the plurality of bladders
Implementation Method 2
Some mattresses may include inflatable bladders for supporting patients lying on the support surfaces at different pressures
Data Source
AI summary
A patient-support apparatus according the present disclosure includes a source of pressurized air, a plurality of bladders, a plurality of pressure sensors, and a controller. The controller is configured to execute instructions to adjust pressures in the bladders based on information from the plurality of pressure sensors.