Biomedical subjects

Y Takeno

Publications and source records attributed to Y Takeno.

13 recordsLinked to original sources

PubMed1990

Hydrocephalus associated with malignant hypertension and renal failure.

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Adult↗

PubMed1989

Medullary venous malformation with an arterial component associated with a ruptured aneurysm--case report.

We report the rare of occurrence of a medullary venous malformation (MVM) with an arterial component associated with a saccular aneurysm on the opposite side. This 49-year-old male patient was admitted with headache and vomiting. He was diagnosed as having a subarachnoid hemorrhage on the basis of bloody cerebrospinal fluid. Angiography revealed a saccular aneurysm at the junction of the internal carotid and posterior communicating arteries on the left side. A MVM with an arterial component was also seen in the right basal frontal lobe. On the seventh hospital day, the aneurysm was clipped via a left frontotemporal craniotomy. The postoperative course was uneventful. There are many hypotheses concerning cerebral aneurysms; some are thought to derive from persistent primitive arteries in the early fetal period. On the other hand, MVM is thought to be intimately related to arteriovenous malformation, which is believed to develop from the premordial vascular plexus, also in early fetal life.

Brain Neoplasms↗

PubMed1989

[Evaluation of bone atrophy by microdensitometry and effect of active vitamin D3 (1 alpha-OH-D3) administration in patients receiving anticonvulsants].

Attention has been paid to bone atrophy caused by oral anticonvulsants. Bone atrophy has been judged on X-ray picture in combination with measuring bio-chemical parameters such as serum calcium (Ca), phosphorus (P) and alkaline phosphatase (Alp), and assessing X-ray findings such as bone density and morphological findings of bone. However, the conventional techniques based on these parameters and findings do not always permit diagnosing the disease. Microdensitometric (MD) method, recently developed by Inoue et al. as a method to assess the grades of severity of bone atrophy on X-ray picture of the metacarpal bone II, has been improved in its exactitude and widely applied in clinical practice for diagnosis of bone atrophy. In 174 patients receiving anticonvulsants, the severity of bone atrophy was quantitatively assessed by the MD method. 1 microgram/day of active vitamin D3 (1 alpha-OH-D3) was administered to patients presenting abnormal MD findings indicative of bone atrophy, and the results were as follows: 1. Bone atrophy of grades initial to III was noted in 46 patients (26.4%). There was no sex-difference in incidence of bone atrophy. 2. In patients receiving valproic acid (VPA) for two years or longer, there was no correlation between the duration of VPA treatment and the severity of the disease as assessed by MD method or its incidence, nor between the mean blood level of VPA and the severity. 3. Bone atrophy was found in 25 (29.1%) of the patients receiving anticonvulsants even for less then two years. Five of these 25 patients were alcoholism , and 9 patients received steroids.(ABSTRACT TRUNCATED AT 250 WORDS)

Absorptiometry, Photon↗

PubMed1986

Epidemiology of spontaneous pneumothorax in women.

An epidemiologic study was done on spontaneous pneumothorax in women. Six hundred sixty-four patients with spontaneous pneumothorax comprising 409 with idiopathic pneumothorax (61.6 percent), and 255 with secondary pneumothorax (38.4 percent) were studied. By age, idiopathic pneumothorax had its peak incidence in the 20s and secondary pneumothorax the 30s. Secondary pneumothorax included iatrogenic pneumothorax resulting from acupuncture treatment. The female patients were not so thin and tall as the male patients. The percentage of positive family history among the female patients was 4.42 percent in the idiopathic type and 0.45 percent in the secondary type. The percentage in the male idiopathic type of pneumothorax was 2.29 percent. Catamenial pneumothorax and pneumothorax with pulmonary hamartoangiomyomatosis are well known as specific in female subjects, but the cases are rare. Nonetheless, attention should be paid to female-specific rare types, for the etiology of idiopathic pneumothorax.

Adolescent↗

PubMed1986