Ophthalmic Artery Resistance Index After Peribulbar Block in the Presence of Epinephrine

Ophthalmic Artery Resistance Index After Peribulbar Block in the Presence of Epinephrine

Evaluate ophthalmic artery flow by echo-Doppler before and after peribulbar block with lidocaine in presence or absence of epinephrine.

There are controversies regarding the ophthalmic artery (OA) flow after peribulbar block with the addition of epinephrine. Therefore, we aimed to evaluate OA flow by echo-Doppler before and after peribulbar block with lidocaine in presence or absence of epinephrine.

Fifty-six patients that were eligible for cataract phacoemulsification surgery were selected. Patients were divided into two groups: group 1 - Peribulbar block with lidocaine and 1/200.000 epinephrine; group 2 - Peribulbar block with lidocaine in the absence of epinephrine. The resistance index (RI) of OA was evaluated using echo-Doppler before and 10 min after the peribulbar block.

Inclusion Criteria:

• American Society of Anesthesiologists (ASA) I, II or III physical status classification
• Cataract surgery

Exclusion Criteria:

• glaucoma
• diabetic retinopathy
• previous eye surgery in the same eye
• ocular trauma
• allergic to any protocol medication
• uncooperative patients or cognitive difficulties
• axial eye diameter of less than 21.0 mm or greater than 25.5 mm.