Search PubMed⌕ Search

Biomedical subjects

H Shimazu

Publications and source records attributed to H Shimazu.

At least 127 records · Page 7Linked to original sources
PubMed1985

A new in vivo staining method, cresyl violet staining, for fiberoptic magnified observation of carcinoma of the gastric mucosa.

A polypoid gastric mucosal lesion with a flat portion was observed by a fiberoptic magnifying endoscope with a new in vivo staining method, cresyl violet staining. The fine surface structure of this lesion showed a characteristic "ruined sulciform pattern" suggesting papillary carcinoma histologically. Successful application of the findings of dissecting microscopy to clinical magnifying endoscopy by means of this new staining material indicates the possibility of diagnosing gastric mucosal carcinomas with much more accuracy.

Benzoxazines↗
PubMed1984

Vitamin D status after total gastrectomy.

Serum levels of 25-hydroxyvitamin D, 24,25-dihydroxyvitamin D, 1,25-dihydroxyvitamin D, immunoreactive parathyroid hormone, and urinary excretion of nephrogenous cyclic AMP were measured in 25 patients after total gastrectomy. Two types of reconstruction after total gastrectomy were also compared. Serum 25-hydroxyvitamin D levels were significantly decreased and serum 24,25-dihydroxyvitamin D levels were markedly reduced, whereas serum 1,25-dihydroxyvitamin D levels were significantly increased in the patients. Although serum levels of immunoreactive parathyroid hormone did not show a significant difference, serum alkaline phosphatase levels and urinary excretion of nephrogenous cyclic AMP were significantly increased in the patients. The results suggest that defective vitamin D storage and enhanced vitamin D action coexist in patients after total gastrectomy and that the enhanced vitamin D action, possibly derived from slightly increased parathyroid function, would be a compensatory mechanism to sustained calcium deficiency. No substantial difference of vitamin D status was observed between the two types of reconstruction which differed in passage through the duodenum.

Adult↗
PubMed1984

Venous occlusive RN plethysmography: comparison with electrical admittance plethysmography.

A venous occlusion plethysmography using radionuclide (RN) was introduced for the measurement of the limb blood flow. This technique, called RN plethysmography, can be carried out in a subject who has been previously administered RN intravenously for the routine angiographic examination. The blood flow is calculated from the initial slope of the RN count rate change (RN accumulation curve) due to venous occlusion. In this study, this method was compared with electrical admittance plethysmography. The blood flow values determined by these two methods correlated well with each other.

Biomedical Engineering↗
PubMed1983

Two stages of excitability change of pontine pause neurons in the cat.

Spikes of single pontine pause neurons (PNs) in the cat were recorded extracellularly and identified by observing cessation of tonic discharges before and during the fast phase of vestibular nystagmus. PNs were antidromically activated from the excitatory burst neuron area. Antidromic spikes were abolished or their peak latencies were prolonged during particular periods within a nystagmic cycle. The excitability change in PNs indicated by alteration of the antidromic responses occurred with two stages; i.e. a moderate decrease in excitability before the onset of the fast phase and an abrupt, intense decrease starting form the beginning of the fast phase.

Animals↗
PubMed1983

Superficial carcinoma of the esophagus.

Nine cases of superficial carcinoma of the esophagus were described. Although 3 patients complained of abdominal sensations on swallowing or dysphasia, 6 patients did not present with any symptoms related to the esophageal lesion. The radiologic diagnosis is particularly difficult in cases with superficial type esophageal cancer, and no definitive findings were obtained in three such cases. However, esophagoscopy using Lugol spray was far more effective for the recognition of these superficial lesions. Although surgical resection of the esophagus is technically easier in these cases, the indications of surgery should be carefully evaluated. One operative death occurred in our series. In cases that are good indications, however, wide lymph node dissection should be carried out, since metastases occur even to distant lymph nodes, particularly in cases with cancer invasion of the submucosal layer. The histopathologic diagnosis was squamous cell carcinoma in 8 cases, but in one case it was adenocarcinoma of mucus-secreting gland origin in the mid-thoracic esophagus.

Aged↗