Body Mass Index-Dependent Ventilatory Parameters From Respiratory Inductive Plethysmography During 6-Minute Walk Test

Abstract

This respiratory monitoring method is sufficiently sensitive to point out differences between rest and exercise as well as locomotor and ventilatory differences relative to BMI during the 6MWT. Thus, this system gives useful information from the 6MWT for clinicians who want to assess respiratory patterns of patients during this commonly used test.

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

“…This finding underlines the fact that Vt obtained by RIP should be interpreted carefully. As discussed previously by Hollier et al and in our previous paper alteration of RIP values may be found in high BMI subjects (Hollier et al, 2014;Retory et al, 2016a).…”

“…Nevertheless, there are still some concerns regarding the reliability of RIP in obese populations. Indeed, as discussed in our previous study and by Hollier et al, there is doubt regarding adiposity's role in induction of artifacts and reduction of RIP response when measuring tidal volume in high BMI subjects (Hollier et al, 2014;Retory et al, 2016a).…”

“…Hollier et al (2014) found poor agreement between RIP and PT for Obesity Hypoventilation Syndrome subjects and raised some possible factors causing inaccuracy (Hollier et al, 2014). In our previous studies (Retory et al, 2016a(Retory et al, , 2016b, we developed a method for the use of RIP, taking into account these possible reasons for imprecision and successfully applied it in a high BMI population. The choice of only a thoracic RIP was supported by the Banzett calibration, which satisfactorily attributes a thoracic contribution A c c e p t e d M a n u s c r i p t 12 two-fold more than the abdominal one (Banzett et al, 1995).…”

“…We thought to assess a one degree of freedom method independent of abdominal A c c e p t e d M a n u s c r i p t 5 motion because of the inaccuracy of the two degree of freedom model described by Konno and Mead is related to adiposity, which is particularly increased in the abdominal compartment in obese subjects (Avraam et al, 2016;Boudarham et al, 2013;Hollier et al, 2014; Konno and Mead, 1967). In a recent paper (Retory et al, 2016a), we proposed to enrich the 6MWT by using this method, and we described an increase in ventilatory response during the 6MWT in high BMI subjects. These results suggested that this increase could at least partly explain ventilatory discomfort.…”

Gait Monitoring and Walk Distance Estimation With an Accelerometer During 6-Minute Walk Test

“…[8][9][10] In a previous study, we showed the benefits of adding information related to the 6MWT by using respiratory inductance plethysmography, with an adapted method to describe the breathing pattern in lean and overweight healthy adults during the 6MWT. 11 Hence, we hypothesized that an integrated biomechanical analysis of gait combined with ventilatory monitoring during the 6MWT in a population of overweight subjects would yield relevant biomechanical information. A description of gait pattern alteration would help describe the impact of ventilatory limitation.…”