Can I read Respiratory Inductive Plethysmography in the Evaluation of Lower Airway Obstruction During Methacholine Challenge in Infants on EtoBox?

Respiratory Inductive Plethysmography in the Evaluation of Lower Airway Obstruction During Methacholine Challenge in Infants by Dr. Franca Rusconi; Luigi Gagliardi; Hazel Aston; Michael Silverman is a Medicine article available to read on EtoBox.

What is Respiratory Inductive Plethysmography in the Evaluation of Lower Airway Obstruction During Methacholine Challenge in Infants about?

## Abstract Respiratory inductive plethysmography (RIP) is a simple technique for an objective, noninvasive assessment of thoracoabdominal asynchrony, which in turn is an indirect measure of airway obstruction. We evaluated different indices of asynchrony obtained by RIP before and after methacholine‐induced airway obstruction. Bronchial obstruction was elicited by progressive doubling concentrations of methacholine until a > 15% fall in the transcutaneous oxygen tension (P~Ic~O~2~) had developed. Maximal expiratory flow rates at functional residual capacity (FRC) (VmaxFRC) was obtained by the squeeze technique before and after the challenge. Fifteen infants with a history of wheezing were studied after sedation. Thoracoabdominal movements were recorded with RIP bands placed around either the upper or the lower ribcage (RC) and around the abdomen (AB). An inspiratory asynchrony index (IAI) and an expiratory asynchrony index (EAI) were calculated as determined by the lag of RC relative to AB at start of inspiration and of expiration, respectively. The total time in asynchrony (TTA: the percentage of time in which the RC and the AB signals were in opposite direction) and Φ (an angle

Who reads Respiratory Inductive Plethysmography in the Evaluation of Lower Airway Obstruction During Methacholine Challenge in Infants?

Author

Dr. Franca Rusconi; Luigi Gagliardi; Hazel Aston; Michael Silverman

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 8755-6863)

Published

1995

Language

EN

Field

Medicine (Health Sciences)