Digital venous photoplethysmography in the seated position is a reproducible noninvasive measure of lower limb venous function in patients with isolated.

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Presentation transcript:

Digital venous photoplethysmography in the seated position is a reproducible noninvasive measure of lower limb venous function in patients with isolated superficial venous reflux Rachel Clare Sam, MA, MRCS, Katy A.L. Darvall, MRCS, Donald J. Adam, MD, Stanley H. Silverman, MD, Andrew W. Bradbury, MD Journal of Vascular Surgery Volume 43, Issue 2, Pages 335-341 (February 2006) DOI: 10.1016/j.jvs.2005.10.039 Copyright © 2006 The Society for Vascular Surgery Terms and Conditions

Fig 1 Refilling curve produced by digital photoplethysmography machine. Journal of Vascular Surgery 2006 43, 335-341DOI: (10.1016/j.jvs.2005.10.039) Copyright © 2006 The Society for Vascular Surgery Terms and Conditions

Fig 2 Scatter plot of refilling time (RT) 1 against RT2 in the seated position (n = 140). Journal of Vascular Surgery 2006 43, 335-341DOI: (10.1016/j.jvs.2005.10.039) Copyright © 2006 The Society for Vascular Surgery Terms and Conditions

Fig 3 Bland-Altman plot of the difference in refilling time (RT) taken 2 to 5 minutes apart (RT1 − RT2) against mean RT in the seated position (n = 140). The mean difference of RT1 − RT2 was 0.89 seconds (SD, 5.4 seconds); the RT coefficient of repeatability was 10.6 seconds. Journal of Vascular Surgery 2006 43, 335-341DOI: (10.1016/j.jvs.2005.10.039) Copyright © 2006 The Society for Vascular Surgery Terms and Conditions

Fig 4 Difference between refilling time (RT) 1 to 2 weeks apart (RT1 − RT3) against mean RT for the seated position (n = 38). The mean difference for RT1 − RT3 was −0.76 seconds (SD, 6.59 seconds); the RT coefficient of repeatability was 12.9 seconds. Journal of Vascular Surgery 2006 43, 335-341DOI: (10.1016/j.jvs.2005.10.039) Copyright © 2006 The Society for Vascular Surgery Terms and Conditions

Fig 5 Refilling time (RT) 1 against RT2, 2 to 5 minutes apart, for the standing position (n = 37). Journal of Vascular Surgery 2006 43, 335-341DOI: (10.1016/j.jvs.2005.10.039) Copyright © 2006 The Society for Vascular Surgery Terms and Conditions

Fig 6 Difference between refilling time (RT) 1 and RT2 against the mean of RT1 and RT2, 2 to 5 minutes apart for the standing position (n = 37). The mean difference for RT1 − RT2 was 0.46 seconds (SD, 3.69 seconds); the RT coefficient of repeatability was 7.23 seconds. Journal of Vascular Surgery 2006 43, 335-341DOI: (10.1016/j.jvs.2005.10.039) Copyright © 2006 The Society for Vascular Surgery Terms and Conditions

Fig 7 Difference between refilling time (RT) 1 and RT3 against the mean of RT1 and RT2, 1 to 2 weeks apart, for the standing position (n = 27). The mean difference for RT1 − RT3 was −1.3 seconds (SD, 6.53 seconds); the RT coefficient of repeatability was 12.8 seconds. Journal of Vascular Surgery 2006 43, 335-341DOI: (10.1016/j.jvs.2005.10.039) Copyright © 2006 The Society for Vascular Surgery Terms and Conditions