• Study reports abnormally high VTE and high bleed risk in critically ill COVID-19 patients and calls for more effective prevention strategies.
  • Clinicians at NHS hospitals are supporting the care of COVID-19 patients with the use of geko™ devices to reduce the risk of blood clots in the most at risk patients.
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VTE Prevention

Deep Veins Study

The geko™ device prevents stasis in the deep veins
of the calf where early thrombi form1

The publication of a study by Professor Andrew Nicolaides and Dr Maura Griffin has measured the effect of the geko™ device on blood flow in the deep veins of the calf. The study has shown significant volume and velocity increases within the gastrocnemius, peroneal and posterior tibial veins – of particular clinical importance as early thrombi often form in these veins1.

Ths study is the first time that a mechanical device has been able to demonstrate enhancement to blood flow for the prevention of stasis in the deep veins of the calf, and is the result of the unique dorsiflexion achieved by the geko™ device. With this proven ability to prevent stasis in the deep veins of the calf, the study strongly supports use of the geko™ device for VTE prevention.

The Doppler flow readings validate the muscle contraction and rhythmic blood flow increases in the peroneal veins before and after geko™ device application and show distinct increases in both peak volume and velocity.

The effect of the neuromuscular electrostimulation on peak velocity and volume flow, within the 3 calf veins studied are shown here.

Graph 2Enlarge

The graphs illustrate the greatest increases in peak velocity and volume flows occurred in the peroneal veins followed by the gastrocnemius veins and finally the PTV.


  1. A Nicolaides, M Griffin. Measurement of blood flow in the deep veins of the lower limb using the geko™ device neuromuscular electro-stimulation device, Journal of International Angiology, August 2016-04.

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Al Mahmoud Medical Center, Qatar, adopts the geko™ device for prevention of venous thromboembolism (VTE) and reduction of edema (swelling)


The geko™ device receives UK Conformity Assessed Mark

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