A Clinical Study On Controlled Ventilation With Jet-flow Air-mixing CPAP Respirator

Objective To study clinical availability of jet-flow air-mixing cpap respirator in controlled ventilation.Methods Twenty patients undergoing selective surgeries were selected and were applied with general anesthesia. After induction and intubation, 30 min of controlled ventilation was given with Ohmeda anesthetic ventilator(method OH), and then jet-flow air-mixing CPAP respirator was used to perform manually controlled ventilation for 30 min(method CP). The following parameters were recorded and the data were compared between the two methods: hemodynamics (SBP,DBP,HR), the respiratory function (FiO₂,SpO₂,EtCO₂) and arterial blood gas analysis(pH,PaO₂,PaCO₂,SO₂).Results FiO₂ of method OH was 88.85±6.29%, while that of method CP was 41.15±2.28%. There was significance of statistics between the two methods but all the two data met the cilinical requirement, which is over 21%. Consequent PaO₂ of method OH was 329±96.01mmHg and that of method CP was 127.78±46.91mmHg. Though there was significance of statistics between the two data, they still fell into the physiologically safe range of over 100mmHg. No significance of statistics was found between others data.Conclusion Manually controlled ventilation with jet-flow air-mixing cpap respirator can meet the clinical requirement.