man measuring oxygen level with modern fingertip pulse oximeter grey table closeup |
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| navigate by keyword : adult background blood cardiac care check checking closeup corona coronavirus covid device electronic equipment finger fingertip grey hand health heartbeat hemoglobin level male man measure measurement measuring medical medicine meter modern monitor monitoring ncov oximeter oximetry oxygen pandemic person pressure pulse rate saturation screen table technology using vital |
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| Man measuring oxygen level with modern fingertip pulse oximeter at grey table |
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