Warren R H, Fewell J E, Alderson S H
Department of Pediatrics, University of Arkansas for Medical Sciences, Arkansas Children's Hospital, Little Rock 72202.
J Dev Physiol. 1989 Dec;12(6):347-52.
Respiratory inductive plethysmography provides a noninvasive method of measuring breathing patterns. Calibration of respiratory inductive plethysmography requires calculation of gain factors for ribcage and abdomen transducers utilizing 2 breathing patterns with different ribcage and abdomen contributions and tidal volume measured by either spirometry or integrated pneumotachography. The purpose of this study was to determine if respiratory inductive plethysmography can be calibrated to provide accurate measurements during quiet and active sleep in lambs. We used a least squares linear regression calibration technique with breaths selected from quiet sleep and active sleep to calculate gain factors in 6 tracheostomized lambs. Validation of gain factors was performed by comparing tidal volumes obtained simultaneously by respiratory inductive plethysmography and pneumotachography during quiet sleep and active sleep. Tidal volume differences between respiratory inductive plethysmography and pneumotachography on validation runs of 15 consecutive breaths each revealed 90% of validation breaths within +/- 20% during quiet sleep and 82% of validation breaths within +/- 20% during active sleep. These data provide evidence that respiratory inductive plethysmography can be calibrated to allow breathing pattern measurement during sleep.
呼吸感应体积描记法提供了一种测量呼吸模式的非侵入性方法。呼吸感应体积描记法的校准需要利用两种具有不同胸廓和腹部贡献的呼吸模式以及通过肺活量计或积分式呼吸流速仪测量的潮气量来计算胸廓和腹部传感器的增益因子。本研究的目的是确定呼吸感应体积描记法是否可以校准，以在羔羊安静睡眠和活跃睡眠期间提供准确的测量。我们对6只气管切开的羔羊采用最小二乘线性回归校准技术，从安静睡眠和活跃睡眠中选取呼吸来计算增益因子。通过比较在安静睡眠和活跃睡眠期间呼吸感应体积描记法和呼吸流速仪同时获得的潮气量来进行增益因子的验证。每次连续15次验证呼吸时，呼吸感应体积描记法和呼吸流速仪之间的潮气量差异显示，在安静睡眠期间90%的验证呼吸在±20%以内，在活跃睡眠期间82%的验证呼吸在±20%以内。这些数据提供了证据，表明呼吸感应体积描记法可以校准，以便在睡眠期间测量呼吸模式。
