how many hours have elapsed since patient 49176 stayed in the careunit sicu for the first time on the current hospital visit?
select 24 * ( strftime('%j',current_time) - strftime('%j',transfers.intime) ) from transfers where transfers.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 49176 and admissions.dischtime is null ) and transfers.careunit = 'sicu' order by transfers.intime asc limit 1