Pressões respiratórias máximas e capacidade vital: comparação entre avaliações através de bocal e de máscara facial

Abstract

Background: Measurement of maximal respiratory pressures and vital capacity are essential in evaluating respiratory function. However, methodological variations may interfere with the interpretation of results. Objective:To compare values obtained using mouthpiece and face-mask evaluation methods in the measurement of maximal respiratory pressures and vital capacity. Method:We studied 30 patients (16 male), with a mean age of 55.9 ± 15.7, in the preoperative phase of abdominal surgery. Maximal inspiratory pressure and maximal expiratory pressure, as well as vital capacity, were evaluated using either a rigid flanged mouthpiece or a face mask, in randomized order.Results: Evaluation with a face mask did not significantly alter vital capacity and maximal inspiratory pressure values, although maximal expiratory pressure values were significantly lower than when measured using a rigid mouthpiece. During measurement of maximal expiratory pressure, air leakage from around the mask was observed in 60% of cases. When maximal expiratory pressure measurements in which there was no such leakage were considered in isolation, face-mask values were higher than those obtained with the moutpiece Conclusion: With a face mask, maximal inspiratory pressure and vital capacity can be accurately evaluated. Maximal expiratory pressure can also be adequately evaluated using a face mask, provided that air leakage from the mask edges can be avoided. However, such leakage and the consequent reduction in the values obtained are common and limit the use of this method of evaluation.

Correlação entre a capacidade vital lenta e o tempo máximo de fonação em adultos saudáveis

“…The measurement of slow vital capacity (SVC) was performed using a ventilometer through a mouthpiece to ensure less air leakage as well as Junior Fiori et al, 20 which reports that different methodological approaches to assess the SCV and the level of patient cooperation might interfere in the performance of maneuvers and consequently affecting the evaluated measures. In the same study 20 , results from respiratory pressures and vital capacity (VC) evaluated between facial mask and a mouthpiece adapted to the ventilometer and manovacuometer were compared.…”

“…The slow vital capacity was measured through an analog ventilometer by brand Ferraris Mark Wright spirometer -USA. All participants were instructed to breathe through a mouthpiece on the device and all made use of a nasal clip during the maneuver 20 . During the tests, they were instructed to sit with proper posture and make a maximum deep inspiration to reach maximum inspiratory capacity.…”

“…Correlação entre a capacidade vital lenta e o tempo máximo de fonação em adultos saudáveis Danusa Cristina Barbosa de Lima (1) , Aline Cabral Palmeira (2) , Emilia Chagas Costa (3) , Fabrício Olinda de Souza Mesquita (4) , Flávio Maciel Dias de Andrade (5) , Marco Aurélio de Valois Correia Júnior (6) the inspiration each participant was instructed to blow all the air slowly until it reached the expiratory reserve volume, then the corresponding values were registered and was chosen the best measurement of three attempts following by a rest time of two minutes between each one 2,16,20 . To evaluate the appropriate volume of air through the issuance of a sound or uninterrupted speech in one exhalation, there were chosen the /a/ vowel being the same, central, open, so the vowel of choice for any voice test, the phoneme /s/ when it is issued after a deep breath, evaluates the pulmonary air support, especially regarding the ability to control it, since there is no vibration of the vocal folds in this sound and phoneme /z/ by requiring the glottal source activity, for verifying the minimum structural alterations of the vocal fold cover, being associated with the kind of insufficient glottal closure, allowing the evaluation of vocal behavior 6,7 .…”

Estudo comparativo do ângulo da cifose torácica e da força dos músculos respiratórios de mulheres idosas

“…12 Utilizou-se um manovacuômetro analógico da marca Suporte ® , devidamente calibrado, com intervalo operacional de ± 300 cm H 2 O, conectado ao paciente por um bucal de plástico rígido -o qual era firmemente segurado pela pró-pria voluntária contra os lábios de modo a evitar vazamento de ar perioral. 13 Todas as manobras foram realizadas com as pacientes sentadas confortavelmente em cadeiras com encosto. A cabeça foi mantida em posição neutra; o quadril e os joelhos, fletidos a 90º; e os pés bem apoiados no piso.…”

Equações preditivas e valores de normalidade para pressões respiratórias máximas na infância e adolescência

“…A mensuração da força muscular respiratória permite identificar precocemente quadros de fraqueza muscular respiratória e de insuficiência respiratória (1) , proporciona maior segurança no tratamento de pacientes (2) , indica a gravidade, as consequências funcionais e o progresso de diversas disfunções pulmonares e neuromusculares (3) , além de contribuir para um melhor acompanhamento do processo de desmame da ventilação mecânica (4) . Existem diversos procedimentos invasivos ou não para avaliar a força muscular respiratória.…”