Lise Pyndt Jørgensen, MD, Torben V. Schroeder, MD, DMSc

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Presentation transcript:

Micro-lightguide spectrophotometry for tissue perfusion in ischemic limbs Lise Pyndt Jørgensen, MD, Torben V. Schroeder, MD, DMSc Journal of Vascular Surgery Volume 56, Issue 3, Pages 746-752 (September 2012) DOI: 10.1016/j.jvs.2012.02.068 Copyright © 2012 Society for Vascular Surgery Terms and Conditions

Fig 1 a, The O2C apparatus consists of a computer using the Windows system and a small probe. On the screen, readings of SO2, rHb, and flow are shown as curves during the examination. This enables the examiner to register any fluctuations. Readings can be made as a continuous reading or over a certain time span and the apparatus calculates a mean value. b, The O2C probe attached to the plantar surface of the first toe using double adhesive tape. c, The limb was elevated 55 cm using a hard pillow. O2C, Micro-lightguide spectrophotometry; rHb, relative blood flow and hemoglobin amount; SO2, saturation. Journal of Vascular Surgery 2012 56, 746-752DOI: (10.1016/j.jvs.2012.02.068) Copyright © 2012 Society for Vascular Surgery Terms and Conditions

Fig 2 O2C SO2 measured with the limb in horizontal position compared with the value obtained when the limb was elevated. The unit of SO2 is %. Data are grouped according to the presence of diabetes. White circles indicte the patients without diabetes; black circles indicate the patients suffering from diabetes. O2C, Micro-lightguide spectrophotometry; SO2, saturation. SO2; 1. toe; elevation, SO2 value measured with the limb elevated at the plantar surface of the first toe. SO2; 1. toe; horizontal %, SO2 value measured with the limb in horizontal position at the plantar surface of the first toe. Journal of Vascular Surgery 2012 56, 746-752DOI: (10.1016/j.jvs.2012.02.068) Copyright © 2012 Society for Vascular Surgery Terms and Conditions

Fig 3 a, TBP compared with O2C SO2 measured with the limb in horizontal position. Unit of TBP is mm Hg and the unit of SO2 is %. Data are divided according to the presence of diabetes. SO2; 1. toe; horizontal, SO2 value measured with the limb in horizontal position at the plantar surface of the first toe. b, TBP compared with SO2 measured with the limb elevated. Unit of TBP is mm Hg and the unit of SO2 is %. Data are grouped according to the presence of diabetes. White circles indicate the patients without diabetes; black circles indicate the patients suffering from diabetes. O2C, Micro-lightguide spectrophotometry; SO2, saturation; SO2; 1. toe; elevation, SO2 value measured with the limb elevated at the plantar surface of the first toe. TBP, toe blood pressure. Journal of Vascular Surgery 2012 56, 746-752DOI: (10.1016/j.jvs.2012.02.068) Copyright © 2012 Society for Vascular Surgery Terms and Conditions

Fig 4 TBP and SO2 measured in horizontal position in each case before and after revascularization. The measurements are plotted individually on the left and right of the figure, respectively. Unit of TBP is mm Hg and the unit of SO2 is %. SO2, Saturation; TBP, toe blood pressure. Journal of Vascular Surgery 2012 56, 746-752DOI: (10.1016/j.jvs.2012.02.068) Copyright © 2012 Society for Vascular Surgery Terms and Conditions