Brinzolamide-timolol fixed combination for the prevention of intraocular pressure elevation after phacoemulsification

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Abstract

Background:

To evaluate the efficacy of brinzolamide-timolol fixed combination in intraocular pressure during the first 24 h after uneventful phacoemulsification cataract surgery using Viscoat and Provisc.

Design:

Prospective randomized comparative case series.

Participants:

Ninety-two eyes of equal patients scheduled for phacoemulsification cataract surgery.

Methods:

Treatment group (52 eyes) received a drop of brinzolamide-timolol fixed combination immediately after surgery. Control group (40 eyes) received no treatment.

Main Outcome Measures:

Intraocular pressure preoperatively and at 6, 12 and 24 h postoperatively.

Results:

Six hours after surgery the mean intraocular pressure decreased by 0.3 ± 2.95 mmHg (P > 0.05) in the treatment group and increased by 6.8 ± 2.78 mmHg (P < 0.001) in the control group. Twelve hours postoperatively, the mean intraocular pressure increased by 0.23 ± 3.49 mmHg (P > 0.05) in the treatment group and by 5.3 ± 3.26 mmHg (P < 0.001) in the control group. Twenty-four hours after surgery, the mean intraocular pressure decreased by 1.76 ± 2.83 mmHg (P < 0.01) in the treatment group and in the control group increased by 1.4 ± 2.46 mmHg (P > 0.05). The intraocular pressure in the treatment group was statistically significantly lower compared with the control group at 6, 12 and 24 h postoperatively. None of the eyes in the treatment group had postoperative intraocular pressure elevation ≥10 mmHg; such an increase was recorded in 20% and 10% of control eyes at 6 and 12 h after surgery, respectively.

Conclusion:

A single dose of brinzolamide-timolol fixed combination after phacoemulsification cataract surgery prevented a significant intraocular pressure increase during the first 24 h postoperatively.

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