what lab tests was patient 68280 receiving for the first time during the current hospital visit?
select d_labitems.label from d_labitems where d_labitems.itemid in ( select labevents.itemid from labevents where labevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 68280 and admissions.dischtime is null ) order by labevents.charttime asc limit 1 )