Pin Point Anesthesia with 4% Lidocaine in Cataract Surgery

ABSTRACT

The increase of preoperative intraocular pressure by anesthetic is a troublesome problem in pin point anesthesia. In order to evaluate the efficacy of 4% lidocaine with less volume in pin point anesthesia 60 cataract surgeries were performed with different anesthetic dosage divided into 3 groups and compared preanesthetic with postanesthetic intraocular pressure and pain score(1; mild, 2; moderate, 3; severe). In the group 1(20 eyes), using 0.3ml of lidocaine, intraocular pressure change from preanesthesia to postanesthesia was 11.83+/-3.44mmHg to 12.19+/-3.27mmHg and there was no statistical significance(p=0.1025). In the group 2(20 eyes), using 0.4ml of lidocaine, intraocular pressure change was 11.53+/-3.22mmHg to 12.33+/-2.91mmHg and was statistically significant(p=0.0028). In the group 3(20 eyes), using 0.5ml of lidocaine, intraocular pressure change was 12.07+/-2.34mmHg to 13.41+/-2.51mmHg and was statistically significant(p=0.0000). Pain score in 3 groups were 1.60+/-0.17, 1.55+/-0.14, 1.35+/-0.11 and there was no statistical difference in 3 groups(p=0.5192). With these results, pin point anesthesia using 0.3ml of 4% lidocaine might be another useful local ocular anesthesia for the routine cataract operation.