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The Tromped: a solution for flight-related deep vein thrombosis?
Carolyn Collins1, Patricia Fitzgerald, David M Kennedy
1Faculty of Engineering, Dublin Institute of Technology, Dublin, Ireland.
Angiology
|March 6, 2008
Summary
In-flight exercise devices can activate the calf muscle pump, potentially reducing the risk of deep vein thrombosis (DVT) during travel. This seated exercise effectively stimulates blood flow, mimicking natural movement.
Area of Science:
- Cardiovascular Physiology
- Aerospace Medicine
- Biomedical Engineering
Background:
- Deep vein thrombosis (DVT) is a recognized risk associated with prolonged immobility during flights.
- Reduced venous return during seated immobility is a key factor contributing to DVT development.
- Developing effective countermeasures for in-flight DVT prevention is crucial for passenger health.
Purpose of the Study:
- To evaluate a prototype in-flight exercise device designed to stimulate ambulatory blood flow while seated.
- To assess the efficacy of the device in activating the calf muscle pump mechanism.
- To compare the calf muscle pump function stimulated by the device with control measurements.
Main Methods:
- A prototype in-flight exercise device with a foot pedal and hinge mechanism was developed.
- Four devices with varying resistance levels were tested.
- Calf muscle pump function was measured using air plethysmography in 10 healthy volunteers.
- Ejection volume fraction (EVF) and venous return fraction (RVF) were determined in standing and seated positions using the devices.
Main Results:
- Two of the four tested devices achieved ejection volume fraction (EVF) and venous return fraction (RVF) values comparable to standing control measurements.
- Plantar flexion against a predetermined resistance effectively activated the calf muscle pump while seated.
- The study demonstrated the potential of seated exercise to enhance venous hemodynamics.
Conclusions:
- Seated plantar flexion exercise using a resistance device can effectively activate the calf muscle pump.
- This type of exercise may serve as a viable strategy to mitigate the risk of flight-related deep vein thrombosis.
- In-flight exercise devices show promise for improving venous return and preventing DVT during air travel.
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