Comparison of Spiral Laryngeal Mask Airway (LMA) and Spiral EndoTracheal Tube (ETT) on Hypnotic and Narcotic consumption for preservation of steady state of depth of anesthesia in Rhinoplasty

Rhinoplasty is a surgery with minimal complications but implication of deliberate hypotension using hypnotics and opioids may potentially increase the morbidity and mortality, therefore, using LMA may decrease hypnotic and opioid use and decrease these potential side effects. Study of hypnotic and opioid use during rhinoplasty and comparing sore throat and hemodynamic indices may provide invaluable information. Methods and Materials: hundred patients with ASA Classification I, aged 18 to 40 years, with no history of co-existing diseases who were candidate for rhinoplasty, allocated randomly into two groups of spiral ETT and spiral LMA. Anesthesia technique was the same in both groups and depth of anesthesia were kept the same in both group (CSI: 40-60). Sore throat evaluated using Numerical Rating Scale (NRS). Amount of each medication recorded and calculated at the end of surgery. Indices were being recorded up to 8 hours after surgery. there was no statistically meaningful difference between two groups concerning demographic data. There was no difference between two groups concerning pre-induction Systolic, diastolic, mean pressure and heart rate. Systolic blood pressure in LMA group was far behind the ETT group in 30, 90 and 150 minutes after induction (P<0.05) which was statistically meaningful.
The other hemodynamic indices and sore throat were not statistically different between two groups. Total dose of Propofol and Remifentanil was far less in LMA group (P<0.05). Using LMA, decreases hypnotic and opioid use in Rhinoplasty to keep the stable depth of anesthesia.