Investigation of the Effects of Pressure Support Ventilation and Positive Airway Pressure Modes During Extubation

Anesthesia

pressure controlled ventilation, positive end-expiratory pressure, tracheal extubation

Controlled ventilation is applied to patients intubated for general anesthesia. Additionally, positive end-expiratory pressure (PEEP) and pressure support are mechanical ventilation modes that have been used in general anesthesia practice for many years. When the recovery-extubation phase is reached, intermittent bag-mask ventilation is usually used and the patient is allowed to breathe spontaneously and is extubated when an adequate respiratory level is reached. It has been shown in previous studies that the use of intermittent mask ventilation causes postoperative atelectasis. Different methods have been used to prevent postoperative atelectasis. In our study, we aimed to observe the effect of terminating general anesthesia at the end of the operation and using PEEP and pressure-supported ventilation during the extubation phase on early complications.

After informed consent was obtained from the patients, monitoring was performed as we practice in routine anesthesia practice. Pressure controlled ventilation (PCV) mode and positive end-expiratory pressure (PEEP) were used as the mechanical ventilation mode after intubation. After the operation was completed, PCV mode on the mechanical ventilator was continued until the patient was extubated. Afterwards, patients were extubated if they complied with verbal commands and/or swallowed and/or coughed in response to vocal stimuli, pupils were in the midline and conjugated, BIS value was \>80, breathing was regular, and TOF response was \>90%. Hemodynamic and respiratory system complications were recorded during the intraoperative, recovery-extubation and postoperative periods. Patients over the age of 18 with American Society of Anesthesiology physical classification (ASA) 1-3 who underwent laparoscopic cholecystectomy were included in the study. In the preoperative period, the patient's demographic data and hemodynamic data, and in the intraoperative period, respiratory data (tidal volume, pressure applied during inspiration, peep, etc.) and hemodynamic data were recorded. Complications recorded during recovery-extubation; desaturation, laryngospasm, bronchospasm, agitation, rescue mask ventilation application, airway obstruction, nausea-vomiting, re-intubation, struggling.

Turkey (Türkiye)