Pursed-Lips Breathing Improves Inspiratory Capacity in Chronic Obstructive Pulmonary Disease

Abstract

Background: In patients with severe chronic obstructive pulmonary disease (COPD), pursed-lips breathing (PLB) improves the pulmonary gas exchange and hyperinflation measured by electro-optic coupling. The response to PLB in inspiratory lung function tests is not known. Objectives: The purpose of this study was to measure the effect of PLB on inspiratory parameters. Methods: Thirty-five subjects with stable COPD and a forced expiratory volume in first second (FEV₁) <50% of the predicted value were tested for the following primary parameters before and immediately after PLB, and 5 min later: forced inspiratory vital capacity, inspiratory capacity (IC), forced inspiratory volume in first second, maximal inspiratory flow at 50% of vital capacity, and peak inspiratory flow. Patients were also tested for the following secondary parameters: vital capacity, FEV₁, breathing frequency, end-tidal CO₂ tension, and oxygen saturation. Results: Of all the primary parameters only IC (p = 0.006) improved significantly; with regard to the secondary parameters, the mean oxygen saturation was improved by 1% (p = 0.005) and the mean end-tidal CO₂ tension and breathing frequency decreased significantly (p < 0.0001 for both) to 3.2 mm Hg and 3.1 breaths/min, respectively. After 5 min the effects diminished. Conclusion: Improved IC after PLB indicates less hyperinflation in patients with severe COPD; there was no effect on parameters of flow.

CPAP and EPAP elicit similar lung deflation in a non‐equivalent mode in GOLD 3‐4 COPD patients

“…On the other hand, there is strong rationale for the use of EPAP as, theoretically, its application could alleviate the dynamic airway compression during expiration, reducing expiratory airflow limitation, a principle similar to the pursed‐lips strategy of breathing, thus increasing IC in patients with COPD, deflating lung regions with intrinsic positive end‐expiratory pressure (PEEP i ), which may be reduced by the presence of this maneuver.…”

the effectiveness of giving pursed lips breathing therapy towards kids' oxygenation status with pneumonia

“…This is also what the researchers did in this study, namely measuring oxygen saturation with oximetry. Pulse oxygen is very sensitive to hyperopia because hemoglobin is close to 100% saturation for the measurement results of SaO2 which is more than 100 mmHg (13).…”

A respiração frenolabial na doença pulmonar obstrutiva crônica: revisão da literatura

“…Os Quadros 1 e 2 descrevem os dez ensaios clínicos selecionados [11][12][13][14][15][16][17][18][19][20] . As duas revisões bibliográficas encontradas na busca realizada estão apresentadas a seguir de forma descritiva, por não possuírem a formatação estabelecida para a análise dos dados.…”

“…Já em exercício, foram observados prolongamento do T TOT , com aumento do VC, diminuição da f e volume minuto inalterado 14 . Visser et al 20 avaliaram os efeitos da RFL sobre os parâmetros inspiratórios neste tipo de população. Os resultados demonstraram melhora na capacidade inspiratória (CI) e aumento de saturação, diminuição de frequência cardíaca e tensão de CO, analisados secundariamente.…”