Title

Validation of respiratory inductive plethysmography (LifeShirt) in obesity hypoventilation syndrome

Publication Date

2014

Abstract

Validation of respiratory inductive plethysmography (LifeShirt system) (RIPLS) for tidal volume (VT), minute ventilation , and respiratory frequency (fB) was performed among people with untreated obesity hypoventilation syndrome (OHS) and controls. Measures were obtained simultaneously from RIPLS and a spirometer during two tests, and compared using Bland Altman analysis. Among 13 OHS participants (162 paired measures), RIPLS-spirometer agreement was unacceptable for VT: mean difference (MD) 3 mL (1%); limits of agreement (LOA) −216 to 220 mL (±36%); MD 0.1 L min−1 (2%); LOA −4.1 to 4.3 L min−1 (±36%); and fB: MD 0.2 br min−1 (2%); LOA −4.6 to 5.0 br min−1 (±27%). Among 13 controls (197 paired measures), RIPLS-spirometer agreement was acceptable for fB: MD −0.1 br min−1 (−1%); LOA −1.2 to 1.1 br min−1 (±12%), but unacceptable for VT: MD 5 mL (1%); LOA −160 to 169 mL (±20%) and : MD 0.1 L min−1 (1%); LOA −1.4 to 1.5 L min−1 (±20%). RIPLS produces valid measures of fB among controls but not OHS patients, and is not valid for quantifying respiratory volumes among either group.

Document Type

Journal Article

Access Rights

ERA Access

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