Comparison of respiratory dynamics of closed circuit ventilation and Jackson-Rees circuit ventilation / 中华麻醉学杂志

ABSTRACT

Objective To evaluate the feasibility of performing closed circuit ventilation with Ohmeda Excel 210 plus ventilator 7900 in the infant anesthesiaMethods Thirty lip cleft or palate cleft infants with body weight under 10 kg were enrolled into the studyIn a sequence of before and after, the parameters of respiratory dynamics were compared between closed circuit ventilation and Jackson-Rees circuit ventilation RR 22 frequency/min, IE 115 and P ETCO 2 40mmHg were set as constant parameters, tidal volume (VT) was adjusted accordinglyThe total respiratory compliance (CT), airway peak pressure (Ppeak), positive end-expiratory pressure (PEEP), fractional concentration of CO 2 in inspiratory gas (FiCO 2), first second forced expiratory volume rate (FEV 10%) were measured during closed circuit and Jackson-Rees circuit ventilationsResults As compared with those during the Jackson-Rees circuit ventilation, PEEP increased significantly and FiCO 2 decreased markedly during the closed circuit ventilationThere were no significant differences in Ppeak, VT, CT, FEV 10%, MAC, SpO 2, HR and MAP between closed circuit ventilation and Jackson-Rees circuit ventilationConclusions It is feasible to perform closed circuit ventilation with Ohmeda Excel 210 plus ventilator 7900 in the infant anesthesia