Aprospective randomized study comparing respiratory efficacy of percutaneous transtracheal and endotracheal, low-frequency jet ventilation during microlaryngeal surgery

Background: Transtracheal jet ventilation is an alternative ventilatory approach in airway surgery. The purpose of this study was to compare respiratory efficacy of percutaneous transtracheal with endotracheal, low frequency jet ventilation during microlaryngeal surgery. Methods: Ninety ASA class I-II patients aged between 16 and 70 years undergoing elective microlaryngeal surgery were prospectively studied and randomly assigned to one of two groups: Percutaneous Transtracheal Jet Ventilation (PTJV) group or subglottic Endotracheal Jet Ventilation ETJV via the Ben-jet tube group. Results: No significant differences in demographic data between the two study groups were observed. The understudy population included; ETJV=42 (total) 25 men, 17 women; PTJV= 48 (total) 34 men, 14 women. Age ranges were: ETJV: 43.83 ±11.52 yr, PTJV: 44.92±12.08 yr; weight ranges were ETJV: 69.62±11.66 kg, PTJV: 71.33±11.57 kg; BMI ranges were ETJV: 24.97±2.58, PTJV: 25.06±2.71. There were no significant differences between the measured pHa, PaO2, PaCO2 in two study groups at the initiation of operation. Significant differences were observed between measured PHa, PaO2 and PaCO2 during operation in ETJV group as compared with PTJV group. Conclusion: We conclude that ETJV procedure provides regular pulmonary gas exchange during microlaryngeal surgery and carbon dioxide elimination can be better maintained in this group compared to the PTJV group.