Avaliaˋˋo do pico de pressˋo e da freq邦那ncia respirat車ria durante o uso de balˋo auto-infl芍vel em um modelo de pulmˋo neonatal

作者：Resende; Jefferson G; Menezes; Cristiane G; Paula; Ana M C; Ferreira; Antonio C P; Zaconeta; Carlos A M; Silva; Cesar A M; Rodrigues; Marcelo P; Tavares; Paulo

来源：Jornal de Pediatria, 2006.

DOI：10.1590/S0021-75572006000600009

• caldiopulmonary resuscitation
• pulmonary ventilation
• mechanical ventilation artificial respiration
• newborn infant
• neonatal asphyxia.

objective: to evaluate the peak inspiratory pressure and ventilation rate achieved by physicians when using a neonatal self-inflating bag on a lung model. methods: fifteen physicians ventilated full term and preterm infant lung simulators while the outcomes were captured by a ventilation monitor. results: median peak pressures in cmh2o for full term and preterm lungs were 23 (interquartile range: 15-47) and 26 (interquartile range: 14-51), being less than 20 in 41.2 and 35.8% of the pressure curves analyzed, more than 40 in 29.7 and 33.6%, and between 27 and 33 cmh2o in 8.2 and 6.5% of the curves, respectively. median ventilation rates were 45 (interquartile range: 36-57) and 48 (interquartile range: 39-55.5) cycles per minute, being more than 30 in 9.3 and 6.7% of pressure curves and more than 60 in 12 and 13.3% of pressure curves, for the full term and preterm lungs, respectively. the differences between these medians were not statistically significant. conclusions: ventilation rates achieved with the self-inflating bag were adequate in approximately 80% of pressure curves analyzed, but the physicians were unable to provide ventilation with minimal pressure variation, producing pressures that diverged from those defined by the neonatal resuscitation training course in 70% of the curves. this was irrespective of whether they were ventilating the lung model analogous to preterm or full term infant lungs.