Document Classification

Section Type: METHODS

Text: A randomized, prospective study on 200 middle-aged to elderly patients undergoing cataract extraction was undertaken to compare the efficacy of : (1) bupivacaine 0. 5 % (bup 0. 5 % plain) ; (2) bupivacaine 0. 5 % plus hyaluronidase 100 i. u. ml-1 (bup 0. 5 % hyalase) ; (3) lidocaine 2 % plus epinephrine 1:200 000 (lido 2 % epi) ; or (4) a mixture of lidocaine 2 % and bupivacaine 0. 5 % (2:3 volume per volume mix) containing hyaluronidase 25 i. u. ml-1 (lido/bup/hyalase).