Posture-Adaptive Abdominal Compression Device for Venous Pooling
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Solution Overview
Problem
Current compression devices for abdominal venous pooling, such as elastic abdominal binders, are ineffective and uncomfortable for prolonged use due to difficulty in applying the required pressure of 20-40 mm Hg, leading to decreased efficacy and low patient compliance in treating orthostatic hypotension.
Innovation Solution
A compression device with an adjustable belt, inflatable bladder, and a control module that automatically adjusts compressive pressure based on the subject's posture, using a pump, pressure relief valve, and controller to maintain effective compression only when needed, thereby improving comfort and efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If elastic abdominal binders are used to apply compression pressure, then abdominal venous pooling is reduced, but patient comfort deteriorates and compliance decreases due to difficulty in applying appropriate pressure and discomfort during prolonged wear
Solution Approach 1:
The compression device transitions from static elastic binders to a dynamic system with an inflatable bladder that can adjust compression pressure in real-time based on patient posture and needs, enabling effective compression when standing while reducing pressure during sitting or supine periods to improve comfort
Solution Approach 2:
The device changes the compression pressure parameter dynamically - inflating the bladder to 20-40 mm Hg when standing to reduce venous pooling, and deflating or reducing pressure when sitting or supine to improve comfort, thus resolving the contradiction between maintaining efficacy and improving comfort
2Reliability
If continuous compression pressure is applied to reduce venous pooling, then orthostatic hypotension is treated, but patient comfort deteriorates during sitting or supine positions
Solution Approach 1:
The compression device applies pressure periodically rather than continuously - inflating the bladder when the patient is standing or transitioning to standing to address venous pooling, and deflating or reducing pressure during sitting or supine periods, thus maintaining blood pressure control while improving comfort during different postures
Solution Approach 2:
The device incorporates posture detection (via accelerometers or user input) that provides feedback to the control system, which then automatically adjusts compression pressure accordingly - applying pressure when standing and reducing it when sitting or supine, resolving the contradiction between efficacy and comfort
3Reliability
If high compression pressure (20-40 mm Hg) is applied to be effective, then venous pooling is reduced, but device complexity increases due to need for precise pressure control mechanisms
Solution Approach 1:
The device uses a pneumatic inflatable bladder system with a pump and pressure relief valve to achieve precise compression pressure control (20-40 mm Hg) without complex mechanical structures, replacing the need for complex elastic tension mechanisms with simpler pneumatic pressure regulation
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 device effectively reduces abdominal venous pooling and orthostatic hypotension by applying necessary pressure only during standing or transitioning to standing, enhancing comfort during sitting or supine positions and improving upright blood pressure.
Implementation Method 1
The pump can be configured to inflate the bladder to a pre-determined pressure and thereby apply a compressive pressure to the abdomen of the subject
Implementation Method 2
The at least one pressure relief valve can be configured to decrease the pressure within the bladder
Data Source
AI summary
A compression device can include an adjustable belt, an inflation bladder, and a control module. The adjustable belt can be sized to fit circumferentially around a subject's abdomen. The inflatable bladder and the control module can be secured to the belt. The control module can include a housing that encloses at least one of a pump, a pressure relief valve, and a controller. The pump and the pressure relief valve can be in fluid communication with the bladder. The pump can be configured to inflate the bladder to a pre-determined pressure and apply a compressive pressure to the subject's abdomen. The pressure relief valve can be configured to decrease the pressure within the bladder. The controller can be configured to automatically adjust the compressive pressure in response to a change in the subject's posture. The controller can be in electrical communication with the pump and the pressure relief valve.