Different airway devices affecting respiratory dynamics in kidney surgeries

The anesthesiologist administered the intervention. After induction and insertion of classic LMA/ProSeal LMA/ i-gel, volume controlled ventilation mode was set and we recorded the respiratory dynamics, heartbeat, systolic, diastolic, mean arterial pressures every 5 minutes during surgery. Surgery usually 60 minutes. We also recorded complications like sore throat, nausea and vomiting after surgery. Allocation is determined by computer randomized technique. The fidelity to the intervention is assessed by the audit of operation notes and anesthesia machine records. The LMA is designed to sit in the patient’s hypopharynx and cover the supraglottic structures, thereby allowing relative isolation of the trachea. LMA ProSeal has a built-in drain tube that allows expelled gastric content to bypass the pharynx. This specific feature is designed to decrease the risk of aspiration. The i-gel is the second generation supraglottic airway device, it works in harmony with the patient's anatomy so that compression and displacement trauma are significantly reduced