instruction: how many hours has it been since last hpt c w/o hepat coma nos diagnosis of patient 9964 on this hospital visit?
response: SELECT 24 * (STRFTIME('%j', CURRENT_TIME()) - STRFTIME('%j', diagnoses_icd.charttime)) FROM diagnoses_icd WHERE diagnoses_icd.icd9_code = (SELECT d_icd_diagnoses.icd9_code FROM d_icd_diagnoses WHERE d_icd_diagnoses.short_title = 'hpt c w/o hepat coma nos') AND diagnoses_icd.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 9964 AND admissions.dischtime IS NULL) ORDER BY diagnoses_icd.charttime DESC LIMIT 1