Validity of thoracic respiratory inductive plethysmography in high body mass index subjects

Yann Rétory (1, 2, 3) , Pascal David (1) , Carole de Picciotto (3) , Pauline Niedzialkowski (3) , Marcel Bonay (1, 2, 3) , Michel Petitjean (3, 4)

1 UVSQ - Université de Versailles Saint-Quentin-en-Yvelines
2 END-ICAP - Handicap neuromusculaire : Physiopathologie, Biothérapie et Pharmacologies appliquées
3 Hôpital Ambroise Paré [AP-HP]
4 CIAMS - Complexité, Innovation, Activités Motrices et Sportives

We aim to evaluate thoracic Respiratory Inductive Plethysmography (RIP) in high body mass index (BMI) subjects with a pneumotachometer (PT) as a reference. We simultaneously evaluated spontaneous breathing by RIP and PT in 10 low and 10 high BMI subjects at rest and in moderate exercise. We then recorded RIP amplitude with different excursions mimicking respiratory thoracic deformation, with different sizes of RIP belts surrounding cylinders of different perimeters with or without deformable foam simulating adipose tissue. RIP responses correlated with PT values in low and high BMI groups for inspiratory time (r=0.86 and r=0.91, respectively), expiratory time (r=0.96 and r=0.91, respectively) and amplitude (r=0.82 for both) but with a bias (-0.23 +/-0.25L) for high BMI subjects. ANOVA revealed the effects of perimeter and simulated adiposity (p<0.001 for both). We concluded that thoracic perimeter and deformity of adipose tissue are responsible for biases in RIP response in high BMI subjects.

Mots clés: BMI; Exercise; Validation; Respiratory inductive plethysmography

Domaines: Sciences du Vivant [q-bio]

Yann Rétory, Pascal David, Carole de Picciotto, Pauline Niedzialkowski, Marcel Bonay, et al.. Validity of thoracic respiratory inductive plethysmography in high body mass index subjects. Respiratory Physiology & Neurobiology, 2017, 242 (28), pp.52-58. ⟨10.1016/j.resp.2017.03.009⟩. ⟨hal-01500114⟩