Application of Two Calibration Methods for Respiratory Plethysmography through Inductance in Two Different Postures

Abstract

The purpose of this study was to assess two methods of calibration of Respiratory Inductive Plethysmography (RIP), isovolume (ISOCAL) and qualitative diagnostic calibration (QDC), in two-body positions (sitting and standing). Twenty-three normal subjects (15 females, 8 males) aged 25,4 ± 3,9 (mean ± standard deviation) years were monitored. The results indicated that the calibration factor (K) is significantly different between both calibration methods. The K mean values, and standard deviation, corresponding to ISOCAL and QDC were 2,6 ± 0,8 and 0,7 ± 0,2 for standing position, and 2,0 ± 0,8 and 0,6 ± 0,2 for sitting position, respectively. We obtained K values in ISOCAL calibration compatible to physiological understanding of the body positions applied.