Mattress Bladder Segmentation for Alternating Pressure Therapy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current patient support apparatuses, such as hospital beds, lack effective mechanisms for dynamically adjusting pressure distribution to enhance comfort and promote blood circulation and re-oxygenation of cells, particularly in medical settings where patients require alternating low pressure therapy.
Innovation Solution
A hybrid mattress system featuring elongated bladders within grooves, adjustable between deployed and non-deployed states, and a manifold system that controls fluid communication with a pump to alter bladder states, creating localized pressure changes and influencing the support surface, allowing for alternating low pressure therapy and enhanced blood circulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional mattress structure is used, then the device complexity is low, but the ability to dynamically adjust pressure distribution is insufficient
Solution Approach 1:
The mattress is divided into multiple independent zones, each containing adjustable bladders that can be controlled separately. This segmentation allows different pressure distribution patterns to be applied to different body regions (head, torso, legs) independently, enabling dynamic adaptation to patient needs while maintaining a manageable system architecture through modular design
Solution Approach 2:
The mattress system incorporates dynamically adjustable bladders that can change their inflation state in real-time based on patient position and therapeutic requirements. The bladders transition between inflated and deflated states to create alternating pressure patterns, transforming a static mattress into a dynamic pressure management system that adapts continuously to patient needs
2Reliability
If bladders are inflated to create pressure changes, then blood circulation and re-oxygenation are enhanced, but the energy consumption increases
Solution Approach 1:
The mattress system implements periodic inflation and deflation cycles of the bladders, creating alternating pressure patterns that mimic natural physiological rhythms. By cycling the bladders between inflated and deflated states in a periodic manner, the system maintains therapeutic effectiveness for blood circulation and re-oxygenation while allowing energy recovery during deflation phases and reducing peak power requirements
Solution Approach 2:
The system recovers energy by capturing the potential energy stored in inflated bladders and utilizing it during deflation phases. The alternating pressure therapy naturally cycles between high and low pressure states, allowing the system to discard excess pressure energy in a controlled manner and recover it through the elastic rebound of the bladder materials, reducing overall energy consumption
3Adaptability or versatility
If multiple bladders are used for localized pressure changes, then pressure distribution customization is improved, but the device complexity increases
Solution Approach 1:
The mattress is divided into multiple independent zones, each containing adjustable bladders that can be controlled separately. This segmentation allows different pressure distribution patterns to be applied to different body regions (head, torso, legs) independently, enabling dynamic adaptation to patient needs while maintaining a manageable system architecture through modular design
Solution Approach 2:
The bladder system is designed with multi-functionality, where the same bladder structure serves multiple therapeutic purposes including pressure relief, circulation enhancement, and positional support. The bladders can be controlled in various combinations and patterns to address different clinical scenarios, reducing the need for separate specialized components for each function
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 provides customizable pressure distribution, improving patient comfort and therapeutic benefits by creating localized pressure changes that enhance blood circulation and re-oxygenation of cells, while being operable in both powered and non-powered conditions.
Implementation Method 1
A pump is in fluid communication with the bladders via the manifold. The pump is configured to direct fluid into and out of the bladders
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A patient support apparatus (10) includes a mattress (14) that defines a plurality of grooves (18). A bladder (22) is disposed within each groove (18). Each bladder (22) is operable between a deployed state (26) and a non-deployed state (30). A flap (34) is disposed adjacent to each groove (18). Each flap (34) includes a broad contact surface (38) and a narrow contact surface (42). A manifold (46) is in fluid communication with each bladder (22). The manifold (46) is configured to direct fluid into each bladder (22) to adjust the bladders (22) between the deployed state (26) and the non-deployed state (26), and consequently move the flaps (34) between a raised position (50) and a lowered position (54), respectively.