scholarly journals Comparison of abdominal muscle activity and peak expiratory flow between forced vital capacity and fast expiration exercise

2017 ◽  
Vol 29 (4) ◽  
pp. 563-566 ◽  
Author(s):  
Hiroshi Ishida ◽  
Tadanobu Suehiro ◽  
Susumu Watanabe
Keyword(s):  
Peak Expiratory Flow ◽  
Forced Vital Capacity ◽  
Muscle Activity ◽  
Vital Capacity ◽  
Abdominal Muscle ◽  
Expiratory Flow

In-brace alterations of pulmonary functions in adolescents wearing a brace for idiopathic scoliosis

2019 ◽  
Vol 43 (4) ◽  
pp. 434-439 ◽  
Author(s):  
Gozde Yagci ◽  
Gokhan Demirkiran ◽  
Yavuz Yakut
Keyword(s):  
Idiopathic Scoliosis ◽  
Pulmonary Function ◽  
Peak Expiratory Flow ◽  
Forced Vital Capacity ◽  
Respiratory Muscle ◽  
Vital Capacity ◽  
Forced Expiratory Volume ◽  
Pulmonary Functions ◽  
Significant Difference ◽  
Expiratory Flow

Background:Despite the common use of braces to prevent curve progression in idiopathic scoliosis, their functional effects on respiratory mechanics have not been widely studied.Objective:The objective was to determine the effects of bracing on pulmonary function in idiopathic scoliosis.Methods:A total of 27 adolescents with a mean age of 14.5 ± 1.5 years and idiopathic scoliosis were included in the study. Pulmonary function evaluation included vital capacity, forced expiratory volume, forced vital capacity, maximum ventilator volume, peak expiratory flow, and respiratory muscle strengths, measured with a spirometer, and patient-reported degree of dyspnea. The tests were performed once prior to bracing and at 1 month after bracing (while the patients wore the brace).Results:Compared with the unbraced condition, vital capacity, forced expiratory volume, forced vital capacity, maximum ventilator volume, and peak expiratory flow values decreased and dyspnea increased in the braced condition. Respiratory muscle strength was under the norm in both unbraced and braced conditions, while no significant difference was found for these parameters between the two conditions.Conclusion:The spinal brace for idiopathic scoliosis tended to reduce pulmonary functions and increase dyspnea symptoms (when wearing a brace) in this study. Special attention should be paid in-brace effects on pulmonary functions in idiopathic scoliosis.Clinical relevanceBracing seems to mimic restrictive pulmonary disease, although there is no actual disease when the brace is removed. This study suggests that bracing may result in a deterioration of pulmonary function when adolescents with idiopathic scoliosis are wearing a brace.

scholarly journals Inclusion of Peak Expiratory Flow for Selection of the 'Best' Forced Vital Capacity Manoeuvre

1996 ◽  
Vol 3 (5) ◽  
pp. 301-308
Author(s):  
Francesco Di Pede ◽  
Francesco Pistelli ◽  
Giovanni Viegi ◽  
Paolo Paoletti ◽  
Alessandro Celi ◽  
...  
Keyword(s):  
Peak Expiratory Flow ◽  
Forced Vital Capacity ◽  
Vital Capacity ◽  
Forced Expiratory Volume ◽  
Expiratory Flow ◽  
Group 5 ◽  
Group 2 ◽  
Exclusive Group ◽  
Asymptomatic Subjects ◽  
Age Range

OBJECTIVE:To assess four different criteria for selecting the 'best' forced vital capacity (FVC) manoeuvre to be used for clinical diagnostic purposes.DESIGN:Criterion standard.SETTING:General population survey performed in 1980-82.PATIENTS:One thousand, two hundred and eighty-three subjects (age range eight to 64 years) were first stratified into five mutually exclusive groups according to the following criteria: simultaneous largest FVC, forced expiratory volume in 1 s (FEV1) and peak expiratory flow (PEF) (group 1; n=481); isolated largest FVC (group 2; n=223); isolated largest FEV1(group 3; n=144); isolated largest PEF (group 4; n=299); and overlapping criteria (group 5; n=136).INTERVENTION:Subjects performed spirometry following American Thoracic Society (ATS) protocol and filled out a standardized respiratory questionnaire.MAIN OUTCOME MEASURES:Spirograms were analyzed by examining the frequency of spirometry abnormalities with regard to the presence of respiratory symptoms, first within mutually exclusive groups of subjects and then within the whole sample. The hypothesis of the role of PEF in 'best test' selection was formulated after data collection.MAIN RESULTS:When the isolated largest PEF criterion was used, the following data were obtained: the highest prevalence of spirometric abnormalities for each FVC parameter in each mutually exclusive group; the highest predictive value for mean and instantaneous expiratory flows in separating symptomatic from asymptomatic subjects; and finally, using the whole sample, higher levels of sensitivity and similar specificity to other criteria for all test parameters (all over 90%, except for PEF).CONCLUSIONS:While maintaining the current ATS criteria of acceptability and variability for FVC trials, it is proposed that the curve that better reflects maximal expiratory effort, ie, that with the largest PEF, be recorded and analyzed for spirometric variables.

scholarly journals Residual Neuromuscular Blockade Affects Postoperative Pulmonary Function

2012 ◽  
Vol 117 (6) ◽  
pp. 1234-1244 ◽  
Author(s):  
Gopalaiah Venkatesh Kumar ◽  
Anita Pramod Nair ◽  
Hanuman Srinivasa Murthy ◽  
Koppa Ramegowda Jalaja ◽  
Karnate Ramachandra ◽  
...  
Keyword(s):  
Neuromuscular Blockade ◽  
Peak Expiratory Flow ◽  
Postoperative Period ◽  
Forced Vital Capacity ◽  
Vital Capacity ◽  
Neuromuscular Blocking ◽  
Neuromuscular Blocking Agents ◽  
Blocking Agents ◽  
Train Of Four ◽  
Expiratory Flow

Abstract Background Residual neuromuscular blockade (RNMB) is known to be associated with respiratory complications in the postoperative period after muscle relaxant usage. The authors hypothesized that RNMB causes reductions in pulmonary function test (PFT) parameters in the immediate postoperative period. Methods An open-label prospective randomized cohort study was conducted comparing reductions in PFT parameters due to RNMB among different neuromuscular blocking agents. One hundred and fifty patients were randomized to receive vecuronium, atracurium, or rocuronium. After reversal of neuromuscular blockade and extubation, train-of-four ratio was measured every 5 min until the train-of-four ratio of 0.9 or greater was attained. PFTs were performed preoperatively and postoperatively when the patients were willing and fit. The train-of-four ratio, measured at PFT, was used to classify patients into “RNMB absent” and “RNMB present.” RNMB was defined as a train-of-four ratio less than 0.9. Results Thirty-nine patients had RNMB at the time of performing PFT. There was no statistically significant difference in the postoperative reductions in PFT parameters in patients with RNMB among different neuromuscular blocking agents. Patients were regrouped as RNMB absent and RNMB present, irrespective of neuromuscular blocking agents. Postoperative PFT values for the RNMB-absent and RNMB-present groups were 62% and 49% of baseline forced vital capacity and 47% and 38% of baseline peak expiratory flow of the baseline, respectively. Postoperative forced vital capacity and peak expiratory flow values of RNMB-present patients were lower by 13% and 9% in absolute terms (P < 0.008) and 21% and 19% in relative terms, respectively, compared with RNMB-absent patients. Conclusion RNMB results in reductions in forced vital capacity and peak expiratory flow in the immediate postoperative period indicating impaired respiratory muscle function.

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