Prolonged Slow Expiration Technique in Infants: Effects on Tidal Volume, Peak Expiratory Flow, and Expiratory Reserve Volume

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dc.contributor.authorLanza, Fernanda de Cordoba [UNIFESP]
dc.contributor.authorWandalsen, Gustavo [UNIFESP]
dc.contributor.authorDela Bianca, Ana Caroline [UNIFESP]
dc.contributor.authorCruz, Carolina Lopes da [UNIFESP]
dc.contributor.authorPostiaux, Guy
dc.contributor.authorSolé, Dirceu [UNIFESP]
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.contributor.institutionGrand Hop Charleroi
dc.date.accessioned2016-01-24T14:17:29Z
dc.date.available2016-01-24T14:17:29Z
dc.date.issued2011-12-01
dc.description.abstractBACKGROUND: Prolonged slow expiration (PSE) is a physiotherapy technique often applied in infants to reduce pulmonary obstruction and clear secretions, but there have been few studies of PSE's effects on the respiratory system. OBJECTIVE: To describe PSE's effects on respiratory mechanics in infants. METHODS: We conducted a cross-sectional study with 18 infants who had histories of recurrent wheezing. the infants were sedated for lung-function testing, which was followed by PSE. the PSE consisted of 3 sequences of prolonged manual thoraco-abdominal compressions during the expiratory phase. We measured peak expiratory flow (PEF), tidal volume (V(T)), and the frequency of sighs during and immediately after PSE. We described the exhaled volume during PSE as a fraction of expiratory reserve volume (%ERV). We quantified ERV with the raised-volume rapid-thoracic-compression technique. RESULTS: the cohort's mean age was 32.2 weeks, and they had an average of 4.8 previous wheezing episodes. During PSE there was significant V(T) reduction (80 +/- 17 mL vs 49 +/- 11 mL, P < .001), no significant change in PEF (149 +/- 32 mL/s vs 150 +/- 32 mL/s, P = .54), and more frequent sighs (40% vs 5%, P = .03), compared to immediately after PSE. the exhaled volume increased in each PSE sequence (32 +/- 18% of ERV, 41 +/- 24% of ERV, and 53 +/- 20% of ERV, P = .03). CONCLUSIONS: It was possible to confirm and quantify that PSE deflates the lung to ERV. PSE caused no changes in PEF, induced sigh breaths, and decreased V(T), which is probably the main mechanical feature for mucus clearance.en
dc.description.affiliationUniversidade Federal de São Paulo, Dept Pediat, BR-04022001 São Paulo, Brazil
dc.description.affiliationGrand Hop Charleroi, Serv Med Interne & Pediat, Charleroi, Belgium
dc.description.affiliationUnifespUniversidade Federal de São Paulo, Dept Pediat, BR-04022001 São Paulo, Brazil
dc.description.sourceWeb of Science
dc.format.extent1930-1935
dc.identifierhttp://dx.doi.org/10.4187/respcare.01067
dc.identifier.citationRespiratory Care. Irving: Daedalus Enterprises Inc, v. 56, n. 12, p. 1930-1935, 2011.
dc.identifier.doi10.4187/respcare.01067
dc.identifier.issn0020-1324
dc.identifier.urihttp://repositorio.unifesp.br/handle/11600/34264
dc.identifier.wosWOS:000298516300008
dc.language.isoeng
dc.publisherDaedalus Enterprises Inc
dc.relation.ispartofRespiratory Care
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectprolonged slow expiration techniqueen
dc.subjectphysiotherapyen
dc.subjectinfanten
dc.subjectpulmonary function testen
dc.subjectexpiratory reserve volumeen
dc.titleProlonged Slow Expiration Technique in Infants: Effects on Tidal Volume, Peak Expiratory Flow, and Expiratory Reserve Volumeen
dc.typeinfo:eu-repo/semantics/article
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