Photoplethysmographic selection of amputation level in peripheral vascular disease Theodore A.A. van den Broek, MD, Boudewijn J. Dwars, MD, Jan A. Rauwerda, MD, PhD, Fred C. Bakker, MD, PhD Journal of Vascular Surgery Volume 8, Issue 1, Pages 10-13 (July 1988) DOI: 10.1016/0741-5214(88)90236-4 Copyright © 1988 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions
Fig. 1 Method of application of the photoplethysmographic transducer. Journal of Vascular Surgery 1988 8, 10-13DOI: (10.1016/0741-5214(88)90236-4) Copyright © 1988 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions
Fig. 2 Bichannel recording of cuff pressure (upper curve) and PPG (lower curve) at 5 mm/sec. Skin perfusion pressure is 34 mm Hg. Journal of Vascular Surgery 1988 8, 10-13DOI: (10.1016/0741-5214(88)90236-4) Copyright © 1988 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions
Fig. 3 Different presentations of the baseline: (a) ascending baseline, SPP = 33 mm Hg; (b) aberrant curve with partial contradictary bending, sometimes seen in low SPPs; SPP is 24 mm Hg; (c) descending baseline, SPP = 31 mm Hg; (d) horizontal baseline, SPP = 35 mm Hg. Journal of Vascular Surgery 1988 8, 10-13DOI: (10.1016/0741-5214(88)90236-4) Copyright © 1988 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions