OBJECTIVE: To assess the accuracy of ankle brachial pressure index (ABPI) assessed by photoplethysmography (PPG) compared with continuous wave Doppler (CW-Doppler). METHODS: Ankle brachial pressure index was measured in a standard manner using both PPG and Doppler probes. For PPG-ABPI, a PPG probe was placed on the index finger and great toe, and a microcomputer determined the ABPI. These values were compared with the ABPI measured manually using an 8-MHz Doppler probe. Correlation and agreement between PPG and Doppler ABPI were assessed by Lin's correlation coefficient and Bland-Altman plots. RESULTS: In all, 133 claudicants were assessed. There was a strong correlation between the 2 ABPI methods (beta = .79 and 95% limits of agreement of -0.23 to 0.24). CONCLUSION: Measuring ABPI automatically using the PPG technique is an effective alternative for Doppler ABPI. PPG-ABPI is completely objective, fast, and accurate.
OBJECTIVE: To assess the accuracy of ankle brachial pressure index (ABPI) assessed by photoplethysmography (PPG) compared with continuous wave Doppler (CW-Doppler). METHODS: Ankle brachial pressure index was measured in a standard manner using both PPG and Doppler probes. For PPG-ABPI, a PPG probe was placed on the index finger and great toe, and a microcomputer determined the ABPI. These values were compared with the ABPI measured manually using an 8-MHz Doppler probe. Correlation and agreement between PPG and Doppler ABPI were assessed by Lin's correlation coefficient and Bland-Altman plots. RESULTS: In all, 133 claudicants were assessed. There was a strong correlation between the 2 ABPI methods (beta = .79 and 95% limits of agreement of -0.23 to 0.24). CONCLUSION: Measuring ABPI automatically using the PPG technique is an effective alternative for Doppler ABPI. PPG-ABPI is completely objective, fast, and accurate.
Authors: Frank Beutner; Andrej Teren; Stephan Gielen; Gerhard Schuler; Kerstin Wirkner; Daniel Tiller; Markus Loeffler; Markus Scholz Journal: Clin Res Cardiol Date: 2012-05-15 Impact factor: 5.460
Authors: Iolanda Riba-Llena; Carmen Ioana Jarca; Xavier Mundet; Jose L Tovar; Francesc Orfila; Antonio López-Rueda; Cristina Nafría; Jose L Fernández; Xavier Castañé; Mar Domingo; José Alvarez-Sabín; Inés Fernández-Cortiñas; Olga Maisterra; Joan Montaner; Pilar Delgado Journal: BMC Neurol Date: 2013-10-02 Impact factor: 2.474