Intraocular Pressure Changes After Regional Anesthesia for Ophthalmic Surgery

Abstract

Objective: Determine the variations in intraocular pressure (IOP) after peribulbar regional anesthesia in ophthalmic surgery with two different mixtures of anesthetic drugs. Materials and methods: Experimental,  prospective, randomized and comparative study performed  at the Centro Medico Docente  the month of October 2021, in 35 patients undergoing elective eye surgery, with peribulbar anesthesia, distributed in two groups: Group A (induction with Lidocaine + Bupivacaine + Hyaluronidase) and group B (Without Hyaluronidase). IOP was measured in three times with Tono-Pen, before anesthesia, after immediate injection and then at 3 minutes. Results: After anesthetic injection, IOP values ​​increased 11% in A and 6% in B with respect to baseline IOP. After 3 minutes of the peribulbar block, there was a decrease in IOP with respect to the baseline value of 11% (group A) and 12% (group B). Conclusion: there is an increase in intraocular pressure with respect to its baseline value in the first measurement, immediately after peribulbar anesthesia in both groups. Likewise, there was a decrease in IOP 3 minutes after the anesthetic injection. There was no statistically significant difference between both mixtures.