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Comparison of Laryngeal Mask Airway and Endotracheal Tube on Intraocular Pressure in Vitrectomy

1Department of Anesthesiology and Intensive Therapy, Faculty of Medicine, Diponegoro University/ Dr. Kariadi General Hospital, Semarang, Indonesia

2Faculty of Medicine, Diponegoro University, Semarang, Indonesia

Received: 29 Jul 2024; Revised: 8 Aug 2024; Accepted: 3 Oct 2024; Available online: 10 Oct 2024.
Open Access Copyright 2021 JAI (Jurnal Anestesiologi Indonesia)
Creative Commons License This work is licensed under a Creative Commons Attribution 4.0 International License.

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Abstract

Background: Increased intraocular pressure (IOP) is a common complication after vitrectomy. Tracheal intubation and insertion of a laryngeal mask airway (LMA) are noxious stimuli that can increase IOP.

Objective: To analyze the difference between the use of LMA and an endotracheal tube (ETT) on the increase in IOP in vitrectomy.

Method: Experimental study with a randomized controlled trial design in 28 patients undergoing vitrectomy who met the inclusion and exclusion criteria. Subjects were divided into 2 groups with the use of LMA and ETT. Intraocular pressure (IOP) was measured using a Schiotz tonometer before induction of anesthesia, 5 minutes after intubation, 5 minutes before extubation, 5 minutes after extubation and 24 hours after vitrectomy in healthy eyes. The analysis was carried out with the unpaired T-test and the alternative Mann Whitney test, the results were significant if the p value <0.05.

Results: The mean IOP in the LMA group was 11.71 ± 1.90 mHg before induction of anesthesia; 11.04 ± 1.71 mmHg 5 min after induction; 10.86 ± 1.44 mmHg 5 min before discharge; 12.11 ± 1,49 mmHg after removal and 12.21 ± 2.63 mmHg 24 hours after discharge. The mean IOP in the ETT group was 11.05 ± 2.57 mHg before induction of anesthesia; 14.26 ± 2.59 mmHg 5 min after induction; 11.71 ± 1.90 mmHg 5 min before extubation; 14.70 ± 0,98 mmHg after extubation and 12.74 ± 1.82 mmHg 24 hours after extubation. A significant difference in IOP was found after ETT intubation and extubation (p < 0,05).

Conclusion: Endotracheal tube (ETT) significantly increases IOP compared to LMA during intubation and extubation in vitrectomy surgery.

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Keywords: airway management; endotracheal tube; intraocular pressure; laryngeal mask airway; vitrectomy

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