Biomedical subjects

K Ohtsubo

Publications and source records attributed to K Ohtsubo.

111 records · Page 7Linked to original sources

PubMedDate not supplied

Drug interactions of zonisamide with phenytoin and sodium valproate: serum concentrations and protein binding.

The influence of co-medication with zonisamide (ZNS) on the serum concentration and protein binding of phenytoin (PHT) and sodium valproate (VPA) was studied in 21 pediatric patients. No significant correlation between the daily ZNS dose, and total serum concentrations, free concentrations or free fractions (FF) of PHT or VPA was observed. The patient study showed that changes in the FF of PHT and VPA were correlated more closely with the serum protein and bilirubin levels than changes in the ZNS dosage. An in vitro study revealed that the addition of ZNS caused decreases in the FF of PHT and VPA. However, these decreases were within the range of measurement error and were negligible. In conclusion, no significant effect of ZNS on the serum concentration or protein binding of PHT or VPA was demonstrated.

Adolescent↗

PubMedDate not supplied

Influence of additional therapy with zonisamide (Excegran) on protein binding and metabolism of carbamazepine.

The influence of comedication with zonisamide (ZNS) on protein binding and carbamazepine (CBZ) metabolism was studied in 16 pediatric epileptic patients. Correlations were evaluated between ZNS daily dose and individual change of level per dose ratio (L/D ratio), free fraction, and carbamazepine-10,11-epoxide/CBZ level ratio (CBZE/CBZ). Statistical significant negative correlation was observed between L/D ratio and ZNS daily dose. Despite alteration in the L/D ratio, the free fraction of CBZ was unaltered in combination with ZNS. To assess the effect of addition of ZNS on CBZ metabolism, the CBZE/CBZ level ratio was compared; this ratio showed a tendency to increase with increase in ZNS dose. Consequently, ZNS is considered to have a significant effect on CBZ metabolism but not on protein binding.

Adolescent↗

PubMedDate not supplied

A pathology database system for autopsy diagnoses using free-text method.

Using natural language a computerized indexing and retrieval system was developed on a commercial database program, DATATRIEVE (Digital Equipment Corporation, Japan). Summarized anatomical diagnoses of nearly 4000 autopsy cases have been registered over a 13-year period at Tokyo Metropolitan Geriatric Hospital. There were 187,367 words in the pathological diagnoses with 4689 distinct words excluding articles, prepositions and conjunctions. 'Atrophy', 'congestion' and 'metastasis' were the most frequent words with frequencies of 4335, 3377, and 3373, respectively. Distinct clinical diagnoses were 2497, among which 'pneumonia', 'hypertension' and 'DIC' predominated. Each step of retrieval by character strings from the sequential data file requires less than a minute.

Aged↗