0000877318-98-000008 SC 13G 1 19980205 NASD QUEST MEDICAL INC 0000351721 3841 751646002 TX 1231 SC 13G 34 005-33902 98522386 ONE ALLENTOWN PKWY ALLEN TX 75002 2143909800 ONE ALLENTOWN PARKWAY ALLEN TX 75002 FIRST PACIFIC ADVISORS INC /CA/ /ADV 0000877318 0000 043118452 MA 1231 SC 13G 11400 W OLYMPIC BLVD STE 1200 LOS ANGELES CA 90064 3109965436 FIRST PACIFIC ADVISORS INC/CA/ /ADV 19930727 SC 13G 1 000087731898000008-001-seq1-sc-13g.txt 12/31/97 QUEST MEDICAL, INC. 13G FILING