Fatores que influenciam a técnica de hiperinsuflação manual com balão auto-inflável neonatal e pediátrico / Factors affecting manual hyperinflação technique with neonatal and pediatric self-inflating bags

AUTOR(ES)
DATA DE PUBLICAÇÃO

2011

RESUMO

Background: Self-inflating bag (BAI) is the device used to manual ventilate during manual hyperinflation (HM) technique. Despite the BAI being widely used, there is limited information available on their physical characteristics and ventilatory outcomes. The goal of this study was to evaluate the performance of three brands of neonatal and pediatric SIB during HM, according to the oxygen flow rate delivered by experienced and inexperienced physiotherapists during HM in two simulated clinical situations. Methods: Twenty two physiotherapists ventilated a test lung (Ventilator tester 2®) simulating a normal and a restrictive respiratory mechanics of a newborn and a children. SIB models tested were J.G.Moryia®, Laerdal® and Hudson®. They received oxygen flows of 0, 5, 10, and 15L/min. Measures of inspiratory volume (Vi), peak inspiratory pressure (PIP), and peak inspiratory flow (PIF) were recorded using a respiratory profile monitor (CO2MOplus®). Results: Regardless of brand or flow, experienced physiotherapists provided largest PFI than inexperienced in neonatal (p=0.026) and pediatric BAI (p=0.029). There was statistical difference in Vi and PIP (p?0.001) delivered between models Hudson®, Laerdal® and J.G.Moryia® in both neonatal and pediatric sizes. When receiving 0L/min O2, the neonatal Hudson® bag delivered a Vi lower than that provided receiving 15L/min. The neonatal and pediatric models of J.G.Moryia® and Laerdal® did not vary the Vi generated in function of oxygen inflows. PIP showed a difference in all neonatal bags according to oxygen inflow; when compared inflows of 0 and 15 L/min, there was an increase of 8.4% in Hudson®, 1.7% in Laerdal® and 3.7% in J.G.Moryia®. Vi, PIP and PFI were significantly different when compared the normal and reduced compliance (p?0.001). Conclusions: The HM performance with BAI in neonatal and pediatric models was influenced by the experience level, the patients lung mechanics, the BAI brand and oxygen flow supplied. These results suggest that physiotherapists should be trained in HM using different brands of BAI in distinct clinical situations

ASSUNTO(S)

ventilação pulmonar ressuscitação cardiopulmonar respiração artificial neonatal pediatria pulmonary ventilation cardiopulmonary resuscitation artificial respiration neonatal pediatric

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