Opposing-Muscle Electrical Cuff for Atrophy and DVT Edema
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Solution Overview
Problem
Prolonged sedentary bed rest leads to physical, cognitive, and mental health impairments, with ICU-acquired weakness affecting up to 70% of survivors and causing long-lasting issues such as permanent atrophy and deep-vein thrombosis (DVT) edema.
Innovation Solution
A system and method using intermittent pneumatic compression and electrical stimulation devices that include a cuff with electrodes to contract opposing muscles, providing variable resistance through a controller that adjusts based on sensor feedback to prevent atrophy and DVT edema.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical stimulation is used to contract muscles during bed rest, then muscle atrophy is prevented, but the system complexity increases due to need for multiple electrodes and control mechanisms
Solution Approach 1:
The patent combines multiple functions into a single integrated cuff device: electrical stimulation electrodes are embedded within the cuff structure, pneumatic compression chambers are integrated into the same device, and all control systems are unified in one unit. This merging approach prevents muscle atrophy through electrical stimulation while avoiding the complexity of separate devices for each function.
Solution Approach 2:
The cuff device is designed to perform multiple functions simultaneously: it provides electrical stimulation for muscle contraction, pneumatic compression for blood flow enhancement, and serves as a unified platform for both preventive and rehabilitative purposes. This multi-functionality addresses muscle atrophy prevention while managing device complexity through a single versatile system.
2Reliability
If variable resistance is provided through opposing muscle contraction, then rehabilitation effectiveness is improved, but the control system complexity increases
Solution Approach 1:
The control system incorporates feedback mechanisms that monitor muscle contraction responses and automatically adjust the resistance provided by opposing muscle stimulation. Sensors detect muscle activity levels and feed this information back to the controller, which modulates the stimulation intensity accordingly. This feedback loop enhances rehabilitation effectiveness while managing control complexity through automated adjustment rather than manual intervention.
Solution Approach 2:
The system dynamically adjusts stimulation parameters based on real-time muscle response. The resistance provided by opposing muscles is not fixed but varies according to the user's capability and progress, allowing the rehabilitation program to adapt automatically. This dynamic control improves rehabilitation effectiveness while the automated nature reduces the complexity of manual control systems.
3Reliability
If prolonged bed rest is maintained for patient care, then medical treatment continuity is improved, but muscle atrophy and DVT edema develop
Solution Approach 1:
The system applies electrical stimulation and pneumatic compression as preliminary protective actions during bed rest periods. By activating muscle contractions and enhancing blood flow before significant atrophy or thrombosis can develop, the system prevents harmful effects while allowing continuous bed rest for medical treatment. This preliminary intervention maintains treatment continuity without allowing muscle atrophy or DVT edema to establish.
Solution Approach 2:
The device applies counter-actions to the harmful effects of bed rest: electrical stimulation counteracts muscle atrophy by maintaining muscle tone and function, while pneumatic compression counteracts DVT edema by promoting venous return and preventing blood stasis. These preliminary anti-actions are applied continuously during bed rest periods, allowing medical treatment to proceed without developing the harmful effects of prolonged immobility.
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
Prevents permanent muscle atrophy and DVT edema by contracting opposing muscles with variable resistance, facilitating rehabilitation without the need for external resistance equipment and adapting to the user's progress.
Implementation Method 1
The stimulation unit is configured to activate the first and second electrodes to simultaneously contract the first muscle of the user
Implementation Method 2
providing a variable resistance to the first muscle of the user through contraction of the second muscle of the user
Implementation Method 3
System and method for prevention of atrophy and / or deep-vein thrombosis edema (DVT)
Data Source
AI summary
In a first aspect, a system for prevention of permanent atrophy and/or deep-vein thrombosis (DVT) edema is presented. The system includes a cuff. The cuff includes a first electrode positioned on a front portion of the cuff. The first electrode is configured to contract a first muscle of a user. The cuff includes a second electrode positioned on a back portion of the cuff, the back portion opposite the front portion. The second electrode is configured to contract a second muscle of a user. The system includes a stimulation unit in electrical communication with the cuff. The stimulation unit includes a controller. The controller is configured to activate the first and second electrodes to simultaneously contract the first muscle of the user while providing a variable resistance to the first muscle of the user through contraction of the second muscle of the user.