what was the last time during their current hospital visit patient 55360 had the maximum hemoglobin.
select labevents.charttime from labevents where labevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 55360 and admissions.dischtime is null ) and labevents.itemid in ( select d_labitems.itemid from d_labitems where d_labitems.label = 'hemoglobin' ) order by labevents.valuenum desc, labevents.charttime desc limit 1