Study on the Usefulness of the High Frequency Jet Ventilation under TIVA with Propofol and Fentanyl for Microlaryngosurgery

Abstract

The purpose of this study is to make a comparison between total intravenous anesthesia (TIVA) and inhalational anesthesia in microlaryngosurgery.
Fifty-eight patients undergoing microlaryngosurgery were studied. The patients were assigned to two groups. Group GOT received isoflurane anesthesia and normal intubation. Group TIVA+HFJV received TIVA with propofol and ventilated with high frequency jet ventilation (HFJV). MERA HFO JET VENTILATOR AE-20 was used for HFJV. The 10Fr jet ventilation tube was nasally intubated. The HFJV set on 1.5or2kg/cm² of pressure and of on 2, 5 and 10Hz of frequencies. We evaluated the time for recovery, hemodynamic change during the induction, at intubation and beginning of the surgery. PaO₂ and PaCO₂ were also measured at 10 and 20min after HFJV.
The time for recovery was significantly shorter and there were less hemodynamic changes in Group TIVA+HFJV. Oxygenation was adequate but significant increase in PaCO₂ was observed with 10Hz at 10 and 20min after HFJV.
We concluded that TIVA combined with HFJV is an excellent method of anesthetic management for microlaryngosurgery.