The Effects of Tracheal Intubation on Changes of Intraocular Pressure after Sevoflurane- N2O Anaesthesia Induction in Children without Use of Muscle Relaxants

Purpose: Laryngoscopy and tracheal intubation may be associated with an acute increase in intraocular pressure and arterial blood pressure. We aimed to investigate the effects oflaryngoscopy and tracheal intubation after anaesthesia induction with 8% sevoflurane inO2-N2O mixture without muscle relaxant, on the blood pressure, heart rate and intraocularpressure in children. Material and Methods: This study was performed in 30 children, undergoing elective non-ophthalmic surgery. Anaesthesia was induced (8%) and maintained (2-3%) with sevoflurane in nitrous oxide and oxygen. No muscle relaxant was used. IOP was measured first after induction, then 1, 3, 5 min after intubation, and just 1 min before and 1, 3 min after extubation. heart rate, arteriel blood pressure, peripheral oxygen saturation values were recorded after anesthesia induction, after intubation 1st, 3rd and 5th minute, just before extubation and 1, 3 and 5 minute later. Results: The average age was 35.82±0.17 months and average weight was 14.57±4.23 kgs. Changes for intraocular pressure was not significantly different (p 0.05). Any complication such as respiratory depression, nausea-vomiting, laryngospasm were not observed after induction, intubation and extubation in the children. Conclusion: Although we did not administer any muscle relaxant, increase in IOP has not been observed during laryngoscopy and intubation.