• Joseph C Wenke, Thomas J Walters, Dominique J Greydanus, Anthony E Pusateri, and Victor A Convertino.
• U.S. Army Institute of Surgical Research, Fort Sam Houston, TX 78234-6315, USA.
• Mil Med. 2005 Sep 1;170(9):776-81.

ObjectiveTo provide a physiological assessment of the U.S. Army one-handed tourniquet (OHT).MethodsAn OHT was self-applied by 26 subjects, to maximal tolerable tightness, to the proximal arm or thigh under different conditions and positions, and the presence of blood flow was assessed using Doppler ultrasonography or occlusion plethysmography.ResultsDoppler sound was eliminated at the radial artery for all subjects with OHT application but was not stopped at the popliteal or dorsalis pedis artery for any subjects. The OHT reduced forearm blood flow by 79% but decreased leg blood flow by only approximately 50%, regardless of condition and position of application to the thigh.ConclusionsThe OHT appears to effectively minimize blood flow in the arm but not in the lower extremities, and clinical assessment of blood flow disappearance by Doppler ultrasonography may underestimate the magnitude of actual blood flow to the limb.

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