Stagg D, Goldman M, Davis J N
J Appl Physiol Respir Environ Exerc Physiol. 1978 Apr;44(4):623-33. doi: 10.1152/jappl.1978.44.4.623.
A computer-assisted method is developed for analyzing volume and time components of individual breaths using a previously developed magnetometer method for recording anteroposterior (AP) diameters of rib cage and abdomen. Calibration constants for the magnetometer system are computed during simultaneous measurements of airflow at the mouth for several breaths during spontaneous breathing. Tidal volume and inspiratory and expiratory times can then be computed from the magnetometer signals alone, without imposing respiratory devices at the subject's airway. No respiratory isovolume maneuvers are necessary. Results from normal subjects and from one patient with bilateral diaphragmatic paralysis show that the magnetometer analysis is closely comparable to standard measurements made from airflow recordings. The magnetometer technique thus provides an accurate means of measuring volume and time components of breathing in man, avoiding the behavioral or reflex effects induced by mouthpiece, nose clip, or face mask. Because no special respiratory maneuvers are required for calibration, the technique will be well suited to the study of breathing in those who are ill.
开发了一种计算机辅助方法，用于使用先前开发的磁力计方法分析个体呼吸的容积和时间成分，该方法用于记录胸廓和腹部的前后径。在自发呼吸期间对几次呼吸的口腔气流进行同步测量时，计算磁力计系统的校准常数。然后仅根据磁力计信号就可以计算潮气量、吸气时间和呼气时间，而无需在受试者气道处施加呼吸装置。无需进行呼吸等容动作。正常受试者和一名双侧膈肌麻痹患者的结果表明，磁力计分析与气流记录的标准测量结果密切可比。因此，磁力计技术提供了一种准确测量人体呼吸容积和时间成分的方法，避免了咬嘴、鼻夹或面罩引起的行为或反射效应。由于校准不需要特殊的呼吸动作，该技术将非常适合于对患病者呼吸的研究。
