Inspiratory muscle resistance in obese and eutrophic individuals

Callegaro, Carine Cristina; Hoffmeister, AD; Lima, Katieli Santos de; Binotto, V.

doi:10.1016/j.rehab.2018.05.1290

Cited by 1 publication

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“…These factors were more closely related to superoptimal PIFR in COPD patients with FEV 1 < 70%pred than in those with FEV 1 ≥ 70%pred. Our result confirms prior findings that male sex and younger age were more likely to be associated with higher PIFR than female sex and older age were 1 , 3 , 15 , Given that inspiratory muscle strength depends on sex, age, and anthropometric indices, the observed finding in our study may be not surprising 16 , 17 , Respiratory muscle power, which was assessed using the maximum inspiratory pressure, was higher in obese individuals than in eutrophic individuals 16 . In terms of FVC %pred, a weak but significant correlation (r = 0.37, p < 0.001) with PIFR has been reported 3 , which is similar to our results (r = 0.316, p < 0.001) obtained from a Pearson’s correlation analysis.…”

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confidence: 91%

Clinical characteristics of chronic obstructive pulmonary disease patients with superoptimal peak inspiratory flow rate

Kim,

Moon,

Park

et al. 2024

Sci Rep

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Characteristics of chronic obstructive pulmonary disease (COPD) patients with superoptimal peak inspiratory flow rates (PIFR) has not been thoroughly investigated. This study aimed to compare the characteristics between COPD patients with superoptimal PIFR and those with optimal and sub-optimal PIFR. PIFR was measured using In-Check DIAL G16 and categorized into sub-optimal (PIFR lower than that required by the patient’s device), optimal, and superoptimal (peak PIFR ≥ 90 L/min). Considering COPD patients with sub-optimal PIFR as the reference group, analyses were performed to identify PIFR-related factors. Subgroup analysis was performed according to the forced expiratory volume in 1 s (FEV1) % of the predicted value (%pred). Among 444 post-bronchodilator-confirmed COPD patients from seven tertiary hospitals in South Korea, 98, 223, and 123 were classified into the sub-optimal, optimal, and superoptimal PIFR groups, respectively. The superoptimal PIFR group were younger, had an increased proportion of males, a higher body mass index, lowest number of comorbidities and less frequent exacerbation in the previous year, as well as the highest forced vital capacity %pred. The adjusted odds ratio for frequent exacerbation in the previous year was lower in the superoptimal PIFR group than in the sub-optimal PIFR group and was more pronounced in patients with an FEV1%pred of < 70%. COPD patients with superoptimal PIFR have clinical characteristics different from those patients with the sub-optimal and optimal PIFR. Having a high inspiratory flow may be a favorable trait in COPD.

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