巻号一覧
42 巻, 2 号
選択された号の論文の4件中1～4を表示しています
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Adam Schreiber, Hilaire AC Jacob, René Hauser, Stefan Kern1993 年 42 巻 2 号 p. 53-59
発行日: 1993年
公開日: 2009/03/27
ジャーナル フリーThe Balgrist hip socket, initially made entirely of HDPE (high molecular weight polyethylene), now made of outer titanium alloy shell that faces the bone of the acetabulum has been in clinical use for 10 years. The purpose of this presentation is to illustrate the biomechanical principles that have governed this unique design and to present the clinical results that we have obtained until the end of 1991 with 717 implants. From 1982 to 1987 Balgrist HDPE sockets had been implanted for 346 hips, from 1984 to 1991 Balgrist Titanium alloy sockets have been implanted for 371 hips. The number of revision are 55 of 717 hips. 48 hips out of 55 were with Balgrist HDPE sockets. On the contrary, only 7 hips were with Balgrist titanium socket. The greatest benefit of Balgrist Titanium socket is the excellent mechanical lock with subchondral bone of the acetabulum.抄録全体を表示PDF形式でダウンロード (10554K) -
泉 義雄, 福内 靖男, 今井 明, 五十棲 一男1993 年 42 巻 2 号 p. 60-63
発行日: 1993年
公開日: 2009/03/27
ジャーナル フリーThe influence of sympathetic nervous activity on cerebral circulation and cerebrovascular CO2 reactivity was investigated by an α-adrenergic blockade with phenoxybenzamine (PBZ). Cerebral oxygen and carbon dioxide tension (BrPo2, BrPco2) and arterial blood pressure were continuously recorded before, during and after intracarotid infusion of 5 mg/kg of PBZ. The effects of 5% CO2 inhalation were measured before and after the infusion of PBZ. Following the intracarotid infusion of PBZ, BrPo2 and BrPco2 did not change significantly. After the α-adrenergic blockade the degree of the increase in BrPo2 during 5% CO2 inhalation was significantly enhanced. The increase in the cerebrovascular CO2 reactivity produced by low dose PBZ suggests that the sympathetic nervous system modifies cerebrovascular CO2 reactivity.抄録全体を表示PDF形式でダウンロード (288K) -
泉 義雄, 福内 靖男, 今井 明, 五十棲 一男1993 年 42 巻 2 号 p. 64-69
発行日: 1993年
公開日: 2009/03/27
ジャーナル フリーThe effects of clonidine, a potent α2 adrenergic agonist and an imidazole/imidazoline receptor agonist, were examined in the cat cerebrovascular system, measuring cerebral oxygen and carbon dioxide tension (BrPo2, BrPco2) and arterial blood pressure. Intracarotid injection of clonidine (2 μg/kg) produced a gradual decrease in systemic blood pressure without initial hypertension, while BrPo2 decreased slightly but significantly. Before and after intracarotid administration of clonidine, cerebrovascular reactivity to carbon dioxide was estimated by changes in BrPo2 and BrPco2 during and after 3 min inhalation of 5% CO2. Clonidine significantly enhanced cerebrovascular reactivity to carbon dioxide. The data suggest that the α2-adrenoceptor and/or imidazole/imidazoline receptor play an important role in the regulation of cerebral circulation.抄録全体を表示PDF形式でダウンロード (454K) -
George W Stroke1993 年 42 巻 2 号 p. 70-77
発行日: 1993年
公開日: 2009/03/27
ジャーナル フリーPerhaps the single most imporant element in the rapid development of contemporary diagnostic imaging is simply its feasibility that results from the deliberate use of complicated, but powerful, mathe matical formulation. Implemented with various types of computers, today mostly digital, in such appli cations at CT (computerized tomography), MRI (magnetic resonance imaging) and others, the underlying principles of the 3-D (three-dimensional) image recording and reconstruction can all he traced back to the principles of “holography”. Further improvements in image communications and processing, for example in view of robotized “Imaging-guided Stereotactic Diagnosis and Treatment” in high-field MRI is likely to result from suitable use of “Fuzzy Logic”.抄録全体を表示PDF形式でダウンロード (6043K)
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