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Biomedical subjects

H Osada

Publications and source records attributed to H Osada.

346 records · Page 20Linked to original sources
PubMedDate not supplied

A case of invasive primary mediastinal seminoma treated radically with replacement of the superior vena cava.

A primary mediastinal seminoma in a 30-year-old man, invading intraluminally into the superior vena cava, was radically treated with reconstruction of the superior vena cava using Gore-Tex grafts. The patient has been doing well without any evidence of tumor recurrence for two years after the surgery, with the grafts being nicely patent. Even when a primary mediastinal seminoma is growing locally into the major veins, the tumor could and should be treated radically, with performing reconstruction of the removed venous system. Gore-Tex graft seems to be acceptable as a venous substitute for major vein replacement.

Adult↗
PubMedDate not supplied

Measurement of cerebral blood flow with two-dimensional cine phase-contrast mR imaging: evaluation of normal subjects and patients with vertigo.

PURPOSE: The purpose of this study was to determine whether or not the vertebral flow of patients with vertigo and normal brain magnetic resonance (MR) images was decreased in comparison with normal controls. MATERIALS AND METHODS: Cerebral blood flow (CBF) was quantitatively measured by a two-dimensional phase contrast cine MR imaging technique in 24 normal controls (mean age, 38.6 years; range, 12-70) and 23 patients (mean age, 53.7 years; range, 19-76) with a 1.5 Tesla MR imaging unit. RESULTS: Inter- and intraobserver variation in blood flow measurements was small (r = 0.970, standard error of the estimate [SEE] = 2.9 ml, n = 80; r = 0.963, SEE = 4.6 ml, n = 40, respectively). In the normal group, mean summed vertebral flow (171 ml/min, SD = 40.6) was significantly less than mean summed carotid flow (523 ml/min, SD = 111). Right vertebral flow (80.2 ml/min, SD = 30.5) was less than left vertebral flow (91.2 ml/min, SD = 38.2), but the difference was not statistically significant (p < 0.05). In the 23 patients, although the summed vertebral flows of two patients (63.3, 88.8 ml/min) were significantly less than that of the normal group, mean summed vertebral flow (165 ml/min, SD = 59.1) showed no significant difference from that of the normal group (p < 0.05). CONCLUSIONS: In this study, the majority of patients had normal CBF. This method is clinically useful for estimating CBF.

Adolescent↗