Assessment of tidal volume and thoracoabdominal motion using volume and flow-oriented incentive spirometers in healthy subjects

Abstract

The objective of the present study was to evaluate incentive spirometers using volume-(Coach and Voldyne) and flow-oriented (Triflo II and Respirex) devices. Sixteen healthy subjects, 24 ± 4 years, 62 ± 12 kg, were studied. Respiratory variables were obtained by respiratory inductive plethysmography, with subjects in a semi-reclined position (45º). Tidal volume, respiratory frequency, minute ventilation, inspiratory duty cycle, mean inspiratory flow, and thoracoabdominal motion were measured. Statistical analysis was performed with Kolmogorov-Smirnov test, t-test and ANOVA. Comparison between the Coach and Voldyne devices showed that larger values of tidal volume (1035 ± 268 vs 947 ± 268 ml, P = 0.02) and minute ventilation (9.07 ± 3.61 vs 7.49 ± 2.58 l/min, P = 0.01) were reached with Voldyne, whereas no significant differences in respiratory frequency were observed (7.85 ± 1.24 vs 8.57 ± 1.89 bpm). Comparison between floworiented devices showed larger values of inspiratory duty cycle and lower mean inspiratory flow with Triflo II (0.35 ± 0.05 vs 0.32 ± 0.05 ml/s, P = 0.00, and 531 ± 137 vs 606 ± 167 ml/s, P = 0.00, respectively). Abdominal motion was larger (P < 0.05) during the use of volumeoriented devices compared to flow-oriented devices (52 ± 11% for Coach and 50 ± 9% for Voldyne; 43 ± 13% for Triflo II and 44 ± 14% for Respirex). We observed that significantly higher tidal volume associated with low respiratory frequency was reached with Voldyne, and that there was a larger abdominal displacement with volumeoriented devices. Correspondence

The effect of sets and repetitions of the spirometer by flow in cardiorespiratory parameters

“…This contrasts a study in which a significant increase in SaO 2 (%) (initial mean 96.06±1.14 and final 97.12±1.36 -p < 0.05) was observed after the use of inspiratory incentives by flow and by volume (30). In this research, an increase in SaO 2 was expected as well, because one of the inspiratory incentive objectives would be increase pulmonary ventilation which would raise SaO 2 , however that did not occur.…”

Breathing pattern and thoracoabdominal motion during exercise in chronic obstructive pulmonary disease

“…QDC is used to set the gains of the two channels so their sum corresponds to lung volume. Subsequently, to obtain the respiratory inductive plethysmographic sum signal for absolute volume in mL, a quantitative calibration was carried out with the subject breathing into the spirometer (Vitatrace, Pro Médico, Brazil) through a mouthpiece with the nose clipped for 30 to 60 s (18,19) and electrical spirometer output was recorded with a computer. The spirometer was calibrated with a 3-liter syringe (Hans Rudolph Inc., USA) using the software RespiPanel and signals were recorded with a digital acquisition system (RespiEvents 5.2, Nims) at rest and during three intensity levels of exercise.…”

Effect of Volume-Oriented Versus Flow-Oriented Incentive Spirometry on Chest Wall Volumes, Inspiratory Muscle Activity, and Thoracoabdominal Synchrony in the Elderly

“…9 Parreira et al 10 and Paisani et al 11 showed that VIS promotes a greater chest wall volume with a larger abdominal contribution than does FIS in healthy adult subjects. In addition, Chang et al (2010) 7 and Parreira et al (2005) 10 suggested that the inspiratory flow, rather than the type of incentive spirometry, determines the breathing pattern and the respiratory muscle activation in this population. 7,10 However, to the best of our knowledge, the effects of VIS and FIS in elderly subjects has not been evaluated.…”

“…In addition, Chang et al (2010) 7 and Parreira et al (2005) 10 suggested that the inspiratory flow, rather than the type of incentive spirometry, determines the breathing pattern and the respiratory muscle activation in this population. 7,10 However, to the best of our knowledge, the effects of VIS and FIS in elderly subjects has not been evaluated. We compared the effects of VIS and FIS on chest wall volume, inspiratory muscle activity, and thoracoabdominal synchrony in healthy elderly and adult subjects.…”