[Clinical application of high frequency jet ventilation in cryotherapy for tracheo-bronchial carcinoma via rigid bronchoscopy].

Objective: To analyze the clinical applications of high frequency jet ventilation(HFJV) in cryotherapy of the trachea and bronchial neoplasms by the rigid bronchoscope. Methods: The clinical data of 35 patients who were treated with tracheal neoplasms cryotherapy by the rigid bronchoscopy under HFJV were collected in China-Japan Friendship Hospital from August 2008 to February 2015.Under general anesthesia, HFJV was used in all patients. The mean arterial pressure (MAP), heart rates (HR), pulse oxygen saturation (SpO(2)), results of arterial blood gas analysis and the incidence of complications during the procedure were recorded. Results: In the 35 patients, one case had multiple operations experience, he had an airway spasm after HFJV 40 min during his second operation, and severe hypoxemia after HFJV 5 min during his third operation, endotracheal intubation was performed immediately. The patient has a serious accumulation of carbon dioxide (CO(2)) whose partial pressure of carbon dioxide in the artery (PaCO(2)) was up to 71 mmHg(1 mmHg=0.133 kPa). Other patients had stable hemodynamics and no severe CO(2) accumulation. Conclusion: High frequency jet ventilation can provide satisfactory ventilation effect in cryotherapy of the trachea and bronchial end-stage neoplasms by the rigid bronchoscope.