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Comparison of two intermittent pneumatic compression systems. A hemodynamic study.

S K Kakkos¹, A N Nicolaides, M Griffin

¹Department of Vascular Surgery, Faculty of Medicine, Imperial College, London, UK.

International Angiology : a Journal of the International Union of Angiology

|December 16, 2005

Summary

Sequential compression devices offer superior hemodynamic effectiveness compared to rapid inflation devices. By sensing venous refill time, sequential compression enhances blood flow and expulsion, potentially improving deep vein thrombosis prevention.

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Area of Science:

Vascular Medicine
Hemodynamics
Medical Devices

Background:

Sequential leg compression is more effective than uniform compression.
The study compares two intermittent pneumatic compression devices: SCD Express and VenaFlow.

Purpose of the Study:

To compare the hemodynamic effectiveness of a portable sequential compression device (SCD Express) with a rapid inflation device (VenaFlow).
To evaluate which device better augments venous blood flow and volume.

Main Methods:

12 healthy volunteers were tested in a semirecumbent position.
Duplex ultrasound assessed common femoral vein flow velocity and volume.
Refill time, total blood expelled per hour, and peak flow velocity were measured.

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Main Results:

Both devices increased venous flow velocity significantly.
The sequential compression device expelled significantly more venous blood per hour (9685 mL vs 4853 mL).
Sequential compression demonstrated superior hemodynamic effectiveness due to longer compression cycles and sensing of venous refill time.

Conclusions:

Sequential compression devices are hemodynamically superior to rapid inflation devices.
Sensing venous refill time enhances the effectiveness of sequential compression.
Further studies are needed to test deep vein thrombosis prevention efficacy.