Anaesthesia-related factors

Excessive cuff inflation, >60 cm H2O


Traumatic Insertion

Poor technique or unfamiliarity with new device

Nitrous oxide use

Failure to measure cuff pressure after insertion of device

Inappropriate sizing of Supraglottic Airway Device

Patient related factors

Diabetes mellitus

Collagen vascular disorders

Peripheral vascular disorders

Surgery related factors

Lateral position

Extreme head rotation

Prone position

Prolonged duration