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Recently, a smart-device-based chest compression depth (CCD) suggestions system that helps ensure that chest compressions have satisfactory depth during cardiopulmonary resuscitation (CPR) was developed. Nevertheless, no CCD feedback gadget has been developed for infants, and plenty of suggestions methods are inconvenient to make use of. In this paper, we report the development of a wise-ring-based mostly CCD feedback system for CPR primarily based on an inertial measurement unit, and propose a excessive-quality chest compression depth estimation algorithm that considers the orientation of the gadget. The efficiency of the proposed feedback system was evaluated by comparing it with a linear variable differential transformer in three CPR situations. The experimental results showed compression depth errors of 2.Zero ± 1.1, 2.2 ± 0.9, and 1.4 ± 1.1 mm in the three situations. In addition, we performed a pilot test with an grownup/infant mannequin. The outcomes of the experiments show that the proposed smart-ring-based mostly CCD suggestions system is relevant to various chest compression methods based on actual CPR situations.

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