Kenji Nagahara

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Changes in components of the electroretinogram during hyperoxia, hypoxia, and hypercapnia were studied to demonstrate retinal vascular autoregulation by electrophysiologic means. Autoregulation of the retinal arterial network is shown to stabilized the b-wave during hyperoxia (arterial PO2 of 395 mm Hg). During marked hypoxia, under ventilation with 10% and(More)
Systemic blood pressure was increased and decreased in anesthetized cats by intravenous infusion of angiotensin and by gradual exsanguination, respectively. The b- and c-wave amplitudes of the electroretinogram were used as indicators of activity of the inner retina and outer retina with pigment epithelium, which are supplied by the retinal and choroidal(More)
Four cases of acute retinal necrosis accompanied by acute uveitis, retinal obliterative vasculitis and confluent yellow-white lesions in the peripheral fundus followed by retinal detachment are reported. The clinical course was rapidly progressive and the prognosis was poor despite various treatments. No systemic abnormality was found and etiology could not(More)
PURPOSE To prospectively and comprehensively compare the clinical results of two small-incision cataract surgery procedures, silicone intraocular lens (refractive index of 1.46) implantation through a 3.2-mm incision and polymethylmethacrylate intraocular lens implantation through a 5.5-mm incision. METHODS Two hundred eyes with cataract randomly were(More)
OBJECTIVE To determine whether positron emission tomography (PET) with tracer 18-fluorodeoxyglucose (FDG-PET) yields additional information in the diagnosis of malignancy compared with magnetic resonance imaging (MRI) findings in selected women after screening for ovarian masses by ultrasonography (US). METHODS After 49 patients were screened by US and(More)
A 65-year-old female with a history of cancer of the uterine body and a strong family history of cancer, was admitted with abdominal pain and anemia. During roentgenographic examination of the small intestine, a tumor was recognized about 25 cm from the ileocecal valve, leading us to suspect a carcinoma of the ileum. A colonoscopy demonstrated a(More)
PURPOSE To compare the long-term clinical results of two small incision cataract surgery procedures. SETTING Seven centers in Japan. METHODS Two hundred eyes were randomly assigned to receive a silicone intraocular lens (IOL) through a 3.2 mm incision or a poly(methyl methacrylate) (PMMA) IOL through a 5.5 mm incision. Except for incision size and(More)
A 62-year-old male had undergone lung lobectomy for adenocarcinoma which was discovered after visual loss from paraneoplastic retinopathy. He had photopsia, decreased visual acuity, ring scotoma, extremely reduced electroretinogram and narrowing of retinal artery. Fluorescein angiography revealed progressive diminution of peripheral retinal blood flow, slow(More)
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