Fig. 1: Overview of the sequential development of the loss of pulse detection algorithm and the validation of the end-to-end system.
From: Automated loss of pulse detection on a consumer smartwatch
Establishing a link between central pulselessness (from VF) and peripheral pulselessness (from an arterial occlusion model) is necessary to enable algorithm development and validation because a prospective study waiting for in-the-wild OHCAs to occur is prohibitive. Peripheral arterial occlusion is achieved using a specialized pneumatic tourniquet that nearly instantaneously restricts limb blood flow.
