Rasheed Khokhar, Abdul Rahim.
Comparison of pupil dilation between intracameral lidocaine & conventional topical mydriatics during phacoemulsification.
Pak J Surg Jan ;26(2):142-5.

Objective: To compare the results of pupil dilation by an intracameral injection of non preserved lidocaine 1% during phacoemulsifi cation cataract extraction and compare the results with those using conventional topical mydriatics. Setting: Department of Ophthalmology, Civil Hospital / Dow University of Health Sciences Karachi Pakistan . Methods: A prospective comparative case series study was conducted. The study included 114 patients who were given topical mydriatics (60 eyes) or intracameral lidocaine (54eyes) to dilate the pupil for phacoemulsifi cation and intraocular lens implantation. The topical group received 3 drops of cyclopentolate 1% and phenylephrine 5% given 5 minutes apart starting 60 minutes before surgery. The intracameral group received preservative-free lidocaine 1% (0.2 to 0.3 mL) injected just before the procedure began. No epinephrine was added to the irrigating solution. In both groups, the horizontal pupil diameter was measured before and aft er pupil dilation using the same caliper. Total surgical time, need for a mydriatic agent during the procedure, and subjective surgical performance were recorded. Results: The mean age, sex, cataract density, baseline horizontal pupil diameter, and mean duration of the surgery were the same between the topical group and intracameral group. The mean pupil dilation was 4.52 mm ± 0.08 (SD) in the intracameral group and 4.06 ± 0.09 mm in the topical group; the difference between groups was statistically signifi cant (P=.001). Th ere was no signifi cant difference between groups in the overall subjective surgical performance (P=.74). No patient in the intracameral group and 4 patients in the topical group required an intracameral mydriatic injection Conclusion: During phacoemulsification, intracameral preservative-free lidocaine 1% provided rapid, effective mydriasis. Th is was comparable with that of topical mydriatics.

PakMediNet -Pakistan's largest Database of Pakistani Medical Journals - http://www.pakmedinet.com