Thiamin and Riboflavin Status of Medical lnpatientst
SRIWATANA SONGCHITSOMBOON, D.Sc.*, SW AIRIN KULAPONGSE, M.Sc. *, UMAPORN UDOMSUBPAYAKUL, M.Sc. * SURAT KOMINDR, M.D.**, ORAWAN PUCHAIWATANANON,D.Sc.**,
Affiliation : * Research Center, ** Department of Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand. t This study was supported by Ramathibodi Research Grant, Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand.
Absirad Thiamin status was assessed by erythrocyte transketolase actiVIty (ETKA) and thiamin pyrophosphate effect (TPPE) and riboflavin status by erythrocyte glutathione reductase activity (EGRA) and activity coefficient (AC) in 165 medical inpatients in Ramathibodi Hospital. Based on TPPE >15 per cent, 9 per cent of the medical inpatients had thiamin depletion. Most of them were patients with renal, cardiovascular, hematological and infectious diseases. Based on AC 2!: 1.2, 17 per cent of these inpatients had riboflavin depletion. Most of them were patients with pulmonary, cardiovascular and hematological diseases. Only one patient with pulmonary disease had both thiamin and riboflavin depletion. The proportion of thiamin depletion (2/37) in sub- jects with thiamin supplementation (mean 32.4, median 6, mode 2 md/d) tended to be less than those without (9/98). But, subjects with riboflavin supplementation (mean 3.3, median 4, mode I md/d) had the proportion of riboflavin depletion (0/31) significantly (Z-test, p< 0.005) lower than without supplementation (23/104). The data sugge:;ted that although the usual dose of vitamin supplementation in medical inpatients is beneficial thiamin depletion can still be present in catabolic patients.
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