caa a22 4500 465825656 CHVBK 20180323112148.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF02832175 doi (NATIONALLICENCE)springer-10.1007/BF02832175 Assessment of peripheral blood flow using a pulse oximeter [Elektronische Daten] [Magnus Vegfors, Björn Tryggvason, Folke Sjöberg, Claes Lennmarken] We investigated the bar graph on a pulse oximeter as an indicator of peripheral blood flow. Because blood flow is known to increase in the lower extremities during spinal analgesia, we chose patients receiving spinal analgesia as the experimental model. Although they are indirect indicators, we used laser Doppler readings and skin temperature to reflect peripheral blood flow. These measurements were made from each patient's foot and hand before and after spinal analgesia and were compared with the deflection on the pulse oximeter bar graph. After subarachnoid injection of bupivacaine, laser Doppler readings from the foot increased to 620 ± 120% (P < 0.05) of the control reading. The pulse oximeter signal amplitude increased from 5.2 ± 0.4 to 9.4 ± 0.3 bars (P < 0.05) and mean skin temperature increased from 24.6 ± 0.5 to 31.2 ± 0.8‡C (P < 0.05). No changes were noted in readings obtained from the hand. A Nellcor N-200 pulse oximeter may be used to evaluate the effect of sympathetic nerve block as indicated by an increase in peripheral blood flow. Little, Brown and Company, 1990 Measurement techniques: laser Doppler flowmetry nationallicence pulse oximetry nationallicence Blood: skin blood flow nationallicence Analgesia: spinal nationallicence Vegfors Magnus Department of Anaesthesiology, University Hospital, S-581 85, Linköping, Sweden aut Tryggvason Björn Department of Anaesthesiology, University Hospital, S-581 85, Linköping, Sweden aut Sjöberg Folke Department of Anaesthesiology, University Hospital, S-581 85, Linköping, Sweden aut Lennmarken Claes Department of Anaesthesiology, University Hospital, S-581 85, Linköping, Sweden aut Journal of Clinical Monitoring Springer Netherlands 6/1(1990-01-01), 1-4 0748-1977 6:1<1 1990 6 10877 https://doi.org/10.1007/BF02832175 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02832175 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Vegfors Magnus Department of Anaesthesiology, University Hospital, S-581 85, Linköping, Sweden aut NATIONALLICENCE 700 1- Tryggvason Björn Department of Anaesthesiology, University Hospital, S-581 85, Linköping, Sweden aut NATIONALLICENCE 700 1- Sjöberg Folke Department of Anaesthesiology, University Hospital, S-581 85, Linköping, Sweden aut NATIONALLICENCE 700 1- Lennmarken Claes Department of Anaesthesiology, University Hospital, S-581 85, Linköping, Sweden aut NATIONALLICENCE 773 0- Journal of Clinical Monitoring Springer Netherlands 6/1(1990-01-01), 1-4 0748-1977 6:1<1 1990 6 10877 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer