The estimation of pulmonary functions in various body postures in normal subjects

Ganapathi, Lathadevi. V.; Vinoth, Sabari

doi:10.18203/2349-3933.ijam20150554

Cited by 8 publications

(8 citation statements)

References 3 publications

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“…The association between FVC and body position in healthy subjects was investigated in 13 studies [ 3 , 17 – 28 ]. There was a clinical and statistically significant increase in FVC in sitting vs. supine positions [ 3 , 18 , 22 – 27 ], in sitting vs. RSL and LSL [ 3 , 21 ], standing vs. supine [ 19 , 23 ], and standing vs. RSL and LSL [ 19 ]. In a smaller number of studies there was no change between standing and sitting [ 19 ], sitting and supine [ 17 , 21 , 28 ] or sitting and RSL or LSL [ 21 ], and one study [ 22 ] found a decrease in FVC from sitting to standing that was statistically but not clinically significant.…”

Section: Resultsmentioning

confidence: 99%

“…In healthy subjects, FEV1 was reported to be higher in sitting vs. supine [ 3 , 18 , 22 , 23 , 26 , 27 , 39 ], in sitting vs. RSL and LSL [ 3 , 19 , 20 ], in standing vs. sitting [ 23 ], and in standing vs. sitting, supine, RSL, and LSL [ 19 ]. However, other studies [ 21 , 24 , 28 , 40 ] did not find significant difference for FEV1 between sitting and supine, RSL, and LSL.…”

Section: Resultsmentioning

confidence: 99%

“…Seven studies compared FEV1/FVC for different body positions in healthy subjects [ 18 , 19 , 23 , 24 , 27 , 28 , 42 ]. In several studies, FEV1/FVC was reported to be higher in sitting vs. supine [ 23 , 28 ], in sitting vs. LSL [ 19 ], and in standing vs. supine, RSL, and LSL [ 19 ]; however, FEV1/FVC was > 70% in all body positions so the difference was not clinically significant. Other studies found no difference between sitting and supine [ 18 , 24 , 27 ] or standing, sitting, and supine [ 42 ].…”

Section: Resultsmentioning

confidence: 99%

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The effect of body position on pulmonary function: a systematic review

et al. 2018

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BackgroundPulmonary function tests (PFTs) are routinely performed in the upright position due to measurement devices and patient comfort. This systematic review investigated the influence of body position on lung function in healthy persons and specific patient groups.MethodsA search to identify English-language papers published from 1/1998–12/2017 was conducted using MEDLINE and Google Scholar with key words: body position, lung function, lung mechanics, lung volume, position change, positioning, posture, pulmonary function testing, sitting, standing, supine, ventilation, and ventilatory change. Studies that were quasi-experimental, pre-post intervention; compared ≥2 positions, including sitting or standing; and assessed lung function in non-mechanically ventilated subjects aged ≥18 years were included. Primary outcome measures were forced expiratory volume in 1 s (FEV1), forced vital capacity (FVC, FEV1/FVC), vital capacity (VC), functional residual capacity (FRC), maximal expiratory pressure (PEmax), maximal inspiratory pressure (PImax), peak expiratory flow (PEF), total lung capacity (TLC), residual volume (RV), and diffusing capacity of the lungs for carbon monoxide (DLCO). Standing, sitting, supine, and right- and left-side lying positions were studied.ResultsForty-three studies met inclusion criteria. The study populations included healthy subjects (29 studies), lung disease (nine), heart disease (four), spinal cord injury (SCI, seven), neuromuscular diseases (three), and obesity (four). In most studies involving healthy subjects or patients with lung, heart, neuromuscular disease, or obesity, FEV1, FVC, FRC, PEmax, PImax, and/or PEF values were higher in more erect positions. For subjects with tetraplegic SCI, FVC and FEV1 were higher in supine vs. sitting. In healthy subjects, DLCO was higher in the supine vs. sitting, and in sitting vs. side-lying positions. In patients with chronic heart failure, the effect of position on DLCO varied.ConclusionsBody position influences the results of PFTs, but the optimal position and magnitude of the benefit varies between study populations. PFTs are routinely performed in the sitting position. We recommend the supine position should be considered in addition to sitting for PFTs in patients with SCI and neuromuscular disease. When treating patients with heart, lung, SCI, neuromuscular disease, or obesity, one should take into consideration that pulmonary physiology and function are influenced by body position.Electronic supplementary materialThe online version of this article (10.1186/s12890-018-0723-4) contains supplementary material, which is available to authorized users.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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The effect of body position on pulmonary function: a systematic review

et al. 2018

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“…These factors are similarly applicable to normal adults and stroke patients. Seo et al In prior studies comparing the vital capacity of healthy adults while lying on the right and left side, many researchers reported greater vital capacity on the right side [8,22,28], but these differences were not statistically significant. However, Manning et al [8] hypothesized that there may be vital capacity differences in the left and right lungs depending on the age and the conditions of the heart and lungs when sitting, while Zack et al [23].…”

Section: Methodsmentioning

confidence: 97%

“…The G-power 3.13 software was used to calculate the sample size. The power and alpha level were set as 0.08 and 0.5, respectively, while the effect size was set at 0.4 according to a preliminary study that In a sitting position, the hip joints are flexed to 90 degrees and the lengths of the abdominal muscles are shorter than when standing [28]. Evaluation of the relationship between the muscle length and tensile force has shown that abdominal muscles are in the optimal position when standing, resulting in a beneficial generation of abdominal pressure [29].…”

Section: Methodsmentioning

confidence: 99%

Pulmonary Function Index Comparisons Depending on Various Postures of Stroke Patients

Lee

2019

KSPM

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PURPOSE: To prevent secondary complications from decreased pulmonary functions and promote neurological recovery, identification of respiratory capacity change patterns depending on different postures of stroke patients and investigation of their properties are needed for active rehabilitation. Therefore, this study was conducted to investigate the changes in vital capacity in response to different positions and to implement the results as clinical data. METHODS: A respiratory function test was administered to 52 patients with stroke in the sitting, supine, paretic side lying, and non-paretic side lying positions. Pulmonary function indexes used for comparison were forced vital capacity (FVC), forced expiratory volume at 1 second (FEV1), forced expiratory flow 25-75% (FEF 25-75%), and maximum voluntary ventilation (MVV). One-way repeated †Corresponding Author : Myung-Mo Lee

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