Warren R H, Alderson S H
Am Rev Respir Dis. 1985 Apr;131(4):564-7. doi: 10.1164/arrd.1985.131.4.564.
We investigated the accuracy of a computer-assisted, respiratory inductive plethysmograph (Respicomp) on 50 awake human newborns who were lying supine. Breaths were selected with different rib cage (RC) to pneumotach (PNT) and abdomen (AB) to pneumotach (PNT) values. The equation RC/PNT + AB/PNT = 1 was solved using the least squares method (LSQ) of calculation of calibration factors. Validation of the calibration factors was performed with a range of consecutive breaths between 6 and 22. Of the 1,128 validation or revalidation breaths, 628 (56%) were within 10% of the simultaneously measured PNT volume, 1,024 (91%) were within 20%, and 1,128 (100%) were within 30%. The RC or AB compartment contributions to ventilation changed spontaneously in the awake newborns. This change eliminated the need to wait for varying sleep states to obtain calibration factors and reduced total time required for calibration. (Some loss of accuracy is a compromise with this method; the calibration factors obtained do not remain accurate while the infant is asleep.) This method provided a reliable and rapid calibration and validation technique of the respiratory inductive plethysmograph (Respicomp) on awake newborns.
我们对50名仰卧位清醒的人类新生儿进行了研究，以评估一种计算机辅助的呼吸感应体积描记仪（Respicomp）的准确性。根据不同的胸廓（RC）与呼吸流速仪（PNT）以及腹部（AB）与呼吸流速仪（PNT）的值来选择呼吸。使用校准因子计算的最小二乘法（LSQ）求解方程RC/PNT + AB/PNT = 1。在校准因子的验证过程中，使用了6至22次连续呼吸的范围。在1128次验证或重新验证呼吸中，628次（56%）在同时测量的PNT体积的10%以内，1024次（91%）在20%以内，1128次（100%）在30%以内。在清醒的新生儿中，胸廓或腹部腔室对通气的贡献会自发变化。这种变化消除了等待不同睡眠状态来获取校准因子的需要，并减少了校准所需的总时间。（这种方法存在一定的准确性损失；所获得的校准因子在婴儿入睡时并不保持准确。）该方法为清醒新生儿的呼吸感应体积描记仪（Respicomp）提供了一种可靠且快速的校准和验证技术。
