PMID: 3335143Jan 1, 1988Paper

Estimates of ventilation from inductance plethysmography in sleeping asthmatic patients

R D BallardR J Martin


To assess the accuracy of the respiratory inductance plethysmograph (RIP) for monitoring ventilation during sleep-associated bronchoconstriction, five adult patients with nocturnal worsening of their asthma were monitored overnight in the sleep laboratory. Three of the five patients demonstrated episodic paradoxic respiratory motion of the lower rib cage undetected by the RIP. Such paradoxic motion was consistently associated with overestimation of volumetric data by RIP compared to pneumotachygraphic measurements. With onset of lower rib cage paradox, the mean error of RIP-derived VT measurements increased from 9.1 +/- 1.7 to 27.9 +/- 3.8 percent (p less than .001). Flow measurements derived from RIP were also inaccurate in the presence of lower rib cage paradox, with the mean error of the measurement increasing from 9.0 +/- 2.5 to 33.5 +/- 5.3 percent (p less than .001). We conclude that RIP is an unreliable technique for quantitatively monitoring ventilation in sleeping asthmatic patients.


Sep 1, 1983·Chest·M J TobinM A Sackner


Jun 1, 1990·The American Review of Respiratory Disease·W C TanR D Ballard
Oct 8, 1999·Chronobiology International·R D Ballard
Jul 6, 2004·Sleep Medicine Reviews·Maree A MilrossRonald R Grunstein
Jul 29, 1988·The American Journal of Medicine·C E Reed, J T Li
Apr 17, 2010·The Journal of Asthma : Official Journal of the Association for the Care of Asthma·Attilio L BonerSimon Godfrey
Nov 27, 2002·Physiological Measurement·B P ReillyP J Whorwell

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