Effects of body position on resting lung volume in overweight and mildly to moderately obese subjects.
INTRODUCTION: A partial sitting position has been reported to increase functional residual capacity (FRC) in lean subjects, whereas FRC does not change with position in the morbidly obese. The effects of positioning in the subgroup of overweight and mildly to moderately obese subjects have not been...
| Published in: | Respiratory Care Vol. 54; no. 3; pp. 334 - 340 |
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| Main Authors: | , , , , , , |
| Format: | research tables/charts Journal Article |
| Published: |
Mary Ann Liebert, Inc.
Mar2009
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| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=105482627&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 105482627 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 00201324 4GG jtl: Respiratory Care issn: 00201324 maglogo: N pubinfo: dt: Mar2009 vid: 54 iid: 3 pid: 1365 pub: Mary Ann Liebert, Inc. place: New Rochelle, New York artinfo: ui: 105482627 105482627 2010228613 NLM19245726 105482627 ppf: 334 ppct: 6 formats: fmt: @attributes: type: P tig: atl: Effects of body position on resting lung volume in overweight and mildly to moderately obese subjects. aug: au: Benedik PS Baun MM Keus L Jimenez C Morice R Bidani A Meininger JC affil: Brazos Anesthesiology Associates, 1737 Briarcrest, Bryan, TX 77802; pvillars.benedik@gmail.com sug: subj: Adipose Tissue Distribution Functional Residual Capacity Patient Positioning Methods Adult Aged Analysis of Variance Body Mass Index Body Weights and Measures Data Analysis Software Descriptive Statistics Effect Size Female Funding Source Lung Volume Measurements Male Middle Age Obesity Pearson's Correlation Coefficient Pulse Oximetry Quasi-Experimental Studies Regression Repeated Measures Respiratory Function Tests Spirometry Supine Position Texas Waist-Hip Ratio Human Adult: 19-44 years Aged: 65+ years Middle Aged: 45-64 years Female Male ab: INTRODUCTION: A partial sitting position has been reported to increase functional residual capacity (FRC) in lean subjects, whereas FRC does not change with position in the morbidly obese. The effects of positioning in the subgroup of overweight and mildly to moderately obese subjects have not been examined. We hypothesized that a change in FRC may be related to adipose tissue distribution. METHODS: We investigated the hypotheses that a 30 degrees Fowler's position would increase the FRC and decrease the closing-capacity-to-FRC ratio in subjects with a body mass index in the 25.0-39.9 kg/m(2) range. We tested whether body fat distribution, measured by waist circumference and waist-to-hip ratio, correlated with the lung-volume changes. RESULTS: The 30 degrees Fowler's position did not improve the FRC, when compared to the supine position (n = 32). The closing-capacity-to-FRC ratio was > 1 in 5 of 7 subjects while sitting, and in all 7 subjects while supine or in the 30 degrees Fowler's position. The waist-to-hip ratio was correlated with closing capacity in all positions, and correlated with closing-capacity-to-FRC ratio in the supine position. CONCLUSIONS: Standard position changes purported to increase FRC are ineffective in the overweight and mildly to moderately obese, a subpopulation represented by almost 67% of Americans. Bedside caregivers may need to modify current practices when the clinical goal is to improve resting lung volumes in sedentary patients. pubtype: Academic Journal doctype: research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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