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Biomedical subjects

T Okada

Publications and source records attributed to T Okada.

At least 901 records · Page 50Linked to original sources
PubMed1988

SF2446, new benzo[a]naphthacene quinone antibiotics. I. Taxonomy and fermentation of the producing strain, isolation and characterization of antibiotics.

New antibiotics SF2446A1, A2, A3, B1 and B2 have been isolated from the culture of Streptomyces sp. SF2446 and antibiotic SF2446B3 has been obtained by methanolysis of SF2446B1 or B2. SF2446A1, A2 and B1 showed strong inhibitory activities against mycoplasmas and Gram-positive bacteria. Empirical molecular formulae of antibiotics SF2446-A1, A2, A3, B1, B2 and B3 were determined to be C34H35NO15, C26H21NO11, C34H35NO14, C34H35NO14 and C26H21NO10, respectively.

Aminoglycosides↗
PubMed1988

[Association of cerebral aneurysm and dural arteriovenous malformation in the anterior cranial fossa: a case report].

A case of dural arteriovenous malformation (AVM) in the base of the anterior cranial fossa associated with a ruptured anterior communicating aneurysm was reported in a 67-year-old man. The dural AVM was fed by the left anterior ethmoidal artery and drained by the left frontal ascending vein with a varicose dilatation. The aneurysm was clipped and the dural AVM was removed in two stages. Dural AVM in the base of the anterior cranial fossa is rare, and we could find only 17 previous reports. Two of them presented with exophthalmos, whereas the remaining 15 cases presented with an intracranial hemorrhage from rupture of the dural AVM. An association of an aneurysm with the dural AVM in this location has not been reported previously.

Aged↗
PubMed1988

[Clinical evaluation of aztreonam against pediatric purulent meningitis].

A monotherapy of aztreonam (AZT) was applied to 9 male and 3 female pediatric patients of ages ranging from 2 months to 8 years and 11 months with serious purulent meningitis. The results are summarized as follows: 1. Daily dosages of 134 to 400 mg/kg were given 3 to 4 times a day for 10 to 28 days. 2. The isolated pathogens were Neisseria meningitidis in 2 cases, Escherichia coli in 3 cases, Haemophilus influenzae in 6 cases, but the pathogen of the last case was unknown. In this case, the patient had myelomeningocele and suffered from recurrent purulent meningitis. 3. Clinical effect was "excellent" in 5 of 12 cases, "good" in 7 cases and efficacy rate was 100%. Microbiological tests were performed on 9 cases during the course of treatment and bacterial elimination rate was 100%. All the pathogens were eliminated in 72 hours. 4. One case of diarrhea was observed, but the diarrhea started before the administration of AZT and was stopped after the AZT treatment. A slight elevation of GOT value was observed in 1 case but the value returned to the initial level promptly after the treatment was completed. It is considered that AZT is highly useful for purulent meningitis caused by Gram-negative pathogens such as H. influenzae, E. coli and N. meningitidis.

Age Factors↗
PubMed1988

[The application of autologous blood transfusion and hypotensive anesthesia for radical hysterectomy in uterine cancer].

The homologous blood transfusion is often required for the replacement of intraoperative blood loss in the radical hysterectomy. Recently, we have tried elective autologous blood transfusion and hypotensive anesthesia to eliminate the complications caused by homologous blood transfusion. This study reports our experience at Kure National Hospital. Radical hysterectomy has been done in 27 cases with uterine cancer from June, 1985 to March, 1987. Homologous blood transfusion was required to one of 5 cases with autologous blood transfusion, none of 5 cases with autologous blood transfusion and hypotensive anesthesia, and 6 of 17 cases without either procedures. Autologous transfusion and hypotensive anesthesia seemed to be effective in reducing homologous blood transfusion.

Adult↗
PubMed1988

[A review of post-operative multiple organ failure in peripheral arterial diseases].

Two-hundred- and-fifty-one patients of peripheral arterial diseases underwent 281 operations for past 11 years in our institute, and multiple organ failure (MOF) occurred in 10 patients (4.0%). These patients were reviewed and were compared with in other diseases. Survival rate was 50% and all the patients with 4 or more organ disorders died. Incidence and survival rate were not significantly different from operative time, blood loss and blood transfusion. Significant difference was observed between elective operation (3.0%) and emergent operation (20.0%). Compared with other diseases, MOF occurred more rarely in peripheral arterial diseases than in aortic aneurysms, but occurred 1.4 times of digestive diseases. While the gastro-intestinal bleeding as the initial failure organ occurred more frequently in peripheral arterial diseases than in other diseases, heart and respiratory failures were rare. MOF occurred after peripheral arterial intervention as well as other abdominal and thoracic surgery. To avoid MOF it is important to avoid MOF that the emergent surgery should be kept out and that general status, especially the grade of diabetes mellitus should be evaluated sufficiently.

Adult↗
PubMed1988

[Clinical and EEG evaluation of mid-line spikes in childhood].

We studied the clinical and electroencephalographic (EEG) characteristics of 45 patients with mid-line spikes. The incidence of mid-line spikes was 3.0% in total EEG population in childhood. Sex incidence was equal. First appearance age of mid-line spikes ranged from one month to 12 years, with a mean of 5.0 years old. Fz focus was in 3 patients, Cz in 31 and Pz in 11. Thirty two of the 45 patients (71%) had a history of clinical seizures; 16 with febrile convulsions and 16 with epileptic seizures. Of the remaining 13 patients without a history of seizures, the EEG was obtained because of post-meningitis in 4, developmental delayed in 4, migraine in 1 and miscellaneous in 4. Mid-line spikes might not have so strong correlations with clinical seizures. Ten patients had a family history of epilepsy and/or febrile convulsion. In the patients with seizures, generalized tonic-clonic seizures were the most frequent type (18; primary GTC and 10; secondary GTC with partial onset). Elementary symptoms of partial seizures were very variable (focal motor in 5, Jacksonian march in 1, aversive in 1, autonomic in 2 and automatism in 5), and which might be related to the other lesions such as temporal and/or frontal lobes. Seizure control was almost good except for two patients with organic brain damage. And other neurological symptoms were not also progressive. On EEG findings, twenty-two patients had midline spikes as their only epileptiform abnormality. The remaining twenty-three had an additional epileptiform feature, either a focal spikes or a generalized spike-wave.(ABSTRACT TRUNCATED AT 250 WORDS)

Brain↗
PubMed1988

[Pharmacokinetics and clinical effects of sultamicillin fine granules in pediatrics].

We have evaluated sultamicillin (SBTPC) fine granules for pharmacokinetics and therapeutic effectiveness in children. The results are summarized as follows. 1. Pharmacokinetic parameters after the oral administration of single dose of 5.0 mg per kg body weight in 1 child were as follows: The peak serum concentrations of ampicillin (ABPC) and sulbactam (SBT) were 1.92 micrograms/ml at 1 hour and 1.85 micrograms/ml at 1 hour, respectively. The half-lives in serum and urinary excretion rate for ABPC and SBT were similar. 2. A clinical study was performed on 15 children with infections, including 4 with tonsillitis, 5 with pharyngitis, 2 each with bronchitis, cystitis, and urinary tract infections. Doses ranging from 6.7 to 18.2 mg/kg body weight were given tid. or qid. Lengths of treatment ranged from 5 to 10 days. The therapeutic responses were considered "excellent" in 6 and "good" in 9, with an effectiveness rate of 100%. 3. As to side effects of the drug, diarrhea was observed in 1 patient. It was concluded that SBTPC was a promising drug for the treatment of bacterial infections in children.

Administration, Oral↗