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Pulse plethysmograms from finger and pinna were recorded simultaneously during anaesthesia, and marked differences in their response to various stimuli recorded. The differences have been illustrated by a number of examples.
BACKGROUND Increased production of red blood cells (RBCs) should be reflected by increased reticulocyte counts (RC). With the introduction of modern fully automated measurements of RC, the recovery of hemoglobin (Hb) after blood loss might be assessed earlier. We investigated the temporal relation of Hb and RC in trauma patients. METHODS Over a 10-month… (More)
In reflection plethysmography at the finger inverted pulsewaves are sometimes observed, especially when, during anaesthesia, arterial pressure is measured in the same arm with an inflatable cuff. The origin of this inversion is investigated to two series experiments with volunteers. In the first series of experiments the influence of the pressure in the… (More)