Search Results
Results 201 - 250 of 1078
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Patton Niall - - 2006
PURPOSE: To describe a revised formula for the estimation of retinal trunk arteriole widths from their respective arteriolar branch widths that improves the summarizing of retinal arteriolar diameters. METHODS: A group of young, healthy individuals underwent retinal photography and arteriolar and venular branching points were identified. Vessel widths of the ...
Ohno-Matsui Kyoko - - 2006
PURPOSE: To describe highly myopic patients in which either the large choroidal veins or arteries were occluded following PDT treatment. METHODS: Demographic features of two highly myopic patients in which large choroidal vessels were occluded at 1 week following PDT, among a total of 23 patients who received PDT due ...
Guseva Y A - - 2006
The aim of this work is to reveal the optic canal (OC) development regularities. It is of importance to identify the anatomical preconditions of tunnel syndrome and other pathologies of the OC. One hundred and five human embryos (195 OC, out of them 98 - left-hand, 97 - right-hand) from ...
Schmidt Dieter - - 2006
BACKGROUND: In subtotal central retinal artery occlusion (CRAO), distinct retinal edema with acute onset irreversible visual loss is common. - METHODS: Clinical observation, fluorescein angiogram. - PATIENT: A 69-year-old patient presented with acute visual loss of his right eye. Risk factors for CRAO were arterial hypertension and diabetes mellitus. A ...
Kimura Tsuyoshi - - 2006
A retinal specimen from a 68-year-old patient with glaucoma and branch retinal vein occlusion was examined by light and electron microscopy. The venous and arterial lumina were filled with erythrocytes, and many erythrocytes extravasated into the venous wall. We suggest that constant rubbing of endothelial cells of the occluded vein ...
van Lint M - - 2006
Report of two patients with severe loss of visual acuity after surgery in the head and neck area. Ophthalmic examination and imaging studies demonstrate an occlusion of the ophthalmic and central retinal arteries. In both cases, the underlying physiopathology is the embolisation by an intra-operatively injected substance. Embolisation is thought ...
Claassen Horst - - 2006
While dissecting the body of a 75-year-old female individual we observed "abnormal" patterns of the A. axillaris and the crural arteries which resembled the mammalian plesiomorphic constellation. In the right arm a large common trunk of the A. axillaris gave origin to the A. profunda brachii, the A. circumflexa humeri ...
Chong Colin C W - - 2006
Optic nerve avulsion (ONA) secondary to finger gouging is a rare complication. A case is reported of a 14-year-old boy who had an acute loss of vision after being poked in his left eye during a game of rugby union. He was later diagnosed with ONA, and this was associated ...
Arikan Gul - - 2006
A rare case with bilateral combined cilioretinal artery and central retinal vein occlusion (CRVO) is reported in a 45-year-old man. Work-up was positive only for already-present type 2 diabetes. The patient first developed ischemic-type CRVO and cilioretinal artery occlusion in his right eye, and underwent successful trabeculectomy with mitomycin-C following ...
Zacharia Brad E - - 2006
The authors detail the life and career of Dr. J. Lawrence Pool, as well as his significant contributions to the field of cerebrovascular neurosurgery. The discipline of cerebrovascular neurosurgery is a young and dynamic field, which underwent rapid and substantial growth during the middle of the twentieth century. As the ...
Galán Alba - - 2006
Fluorescein angiography without sedative or anesthetic agents was evaluated in 20 normal goats and 20 normal sheep. All of the angiographic phases were observed using 20 mg/kg fluorescein IV in both species. Fundus fluorescein angiography results revealed wide stars of Winslow in the tapetal fundus, central or marginal flow during ...
Hoefer Imo E - - 2006
Despite the technical progress in interventional techniques to overcome the harmful effects of ischemic heart disease there is still an urgent need for alternative, pharmaceutical treatment modalities. Exogenous stimulation of vessel growth, i.e. vasculogenesis, angiogenesis or arteriogenesis serves as a promising strategy to restore blood flow to the jeopardized tissue ...
Smith Bradley T - - 2006
We report a case of hemi-retinal vein occlusion following laser-assisted in situ keratomileusis (LASIK) in a healthy 46-year-old Caucasian male. A hemi-retinal vein occlusion following LASIK could be coincidental. However, young age, absence of risk factors and negative laboratory testing require consideration of a causal relationship.
Ozcan S - - 2005
The arterial supply to the retina and lens of 10 fetal, 10 neonatal and four adult Zavot-bred cattle of both sexes was studied macroscopically and by stereoscopic microscopy by means of vascular perfusion with latex, giving special emphasis on the hyaloid artery. The central retinal artery ramified in four major ...
Pettersen J A - - 2005
INTRODUCTION: Retinal artery occlusion represents a medical emergency with poor prognosis for visual recovery. Spontaneous improvement is estimated to occur in less than 15% of central retinal artery occlusion (CRAO) cases and conventional treatments have provided only limited benefit. Intra-arterial thrombolysis has been reported as a potentially efficacious and safe ...
Natiello Michelle - - 2005
OBJECTIVE: To examine the angioarchitecture of the ciliary body in the West Indian manatee (Trichechus manatus), through the use of three-dimensional reconstruction. PROCEDURE: Specimens from West Indian manatee were preserved in 10% buffered formalin, embedded in paraffin, serial sectioned and stained by Masson trichrome for light microscopic three-dimensional reconstruction and ...
Rubin Peter A D - - 2005
The orbital branch of the infraorbital artery is an important surgical landmark but is frequently omitted from texts that discuss orbital anatomy and surgical technique. This report reviews the anatomy of this artery to familiarize the reader with its existence and location to reduce the risk of intraoperative hemorrhage from ...
Erdogmus Senem - - 2005
Knowledge of variations in the possible patterns of origin, course, and distribution of the lacrimal artery are necessary for the diagnosis and important for the treatment of orbital disorders. The vascularization of 38 lacrimal glands was studied by orbital dissection subsequent to injection of the arterial bed with red-dyed latex. ...
Nicol? M - - 2005
PURPOSE: To report a case of a combined branch retinal artery and vein occlusion in a patient with hepatitis C treated with interferon and ribavirin. METHODS: A 29-year-old man with a 1-week history of sudden visual field defect and decrease of central visual acuity was examined. RESULTS: Ophthalmoscopy and fluorescein ...
Khurma Vandana - - 2005
We describe a man presenting with bilateral loss of vision secondary to a branch retinal artery occlusion and ischemic optic neuropathy, in turn related to underlying Wegener granulomatosis (WG). This case is unusual, because the simultaneous development of branch retinal artery occlusion and anterior ischemic optic neuropathy has, to our ...
Taarnhøj Nina C B B - - 2005
PURPOSE: To determine whether the presence of one or more cilioretinal arteries, a distinct element of the pattern of fundus vessels, is genetically programmed, influenced by environmental factors, or the result of random mechanisms of vascular development. METHODS: The fundi of 112 pairs of healthy monozygotic and dizygotic twins were ...
Aslan K - - 2005
This study has aimed at observing in detail the degree of complexity in the formation of the ophthalmic rete in geese living at high altitudes and very cold climate conditions in Kars and its province of Turkey. The 15 adult geese were injected with red and blue coloured latex, dissection ...
Chiu Yu-Te - - 2005
Although it is rare, infectious endophthalmitis is a severe ocular complication resulting from intravitreal injection of triamcinolone acetonide (TA). Therefore, care must be taken by ophthalmologists to differentiate between what is infectious and noninfectious endophthalmitis. We report on a 62-year-old woman who received an intravitreal injection of TA for treatment ...
Murphy Marjorie A - - 2005
A 14-year-old boy with morning glory disc anomaly (MGDA) and normal visual and neurologic function displayed marked carotid artery narrowing on magnetic resonance angiography (MRA). This narrowing disappeared on a follow-up MRA six months later. Optic coherence tomography and scanning laser polarimetry disclosed a normal retinal nerve fiber layer in ...
Kaiser Helene M - - 2005
BACKGROUND: Unlike retinal arterial macroaneurysms, retinal venous macroaneurysms are rare. Retrospective studies have previously described venous macroaneurysms predominantly in association with branch retinal vein obstruction. Only 2 cases of isolated retinal venous macroaneurysm without venous occlusion have been described in the literature. The patient being described in this case report ...
Szpinda Michal - - 2005
Knowledge of the normal anatomic characterization of the popliteal artery and its branches is essential as a guide in vascular surgery below the knee. Using radiologic, digital and statistical methods tibioperoneal trunks were studied on 76 preoperative arteriograms, visualizing bilateral configurations of the popliteal artery division, from 46 men and ...
Kedar Sachin - - 2005
A 52-year-old woman with simultaneous bilateral retinal artery occlusions and normal trans-thoracic echocardiography was found to have a mitral valve lesion on trans-esophageal echocardiography. Bilateral retinal artery occlusions suggest a source of emboli at the level of the heart or aortic arch. Such cases should be evaluated not merely by ...
Ninomiya Hiroyoshi - - 2005
OBJECTIVE: Three female adult rats (Crj: CD(SD) IGS) with colobomatous anomalies were investigated. MATERIALS AND METHODS: The microvascular changes of the coloboma were studied using the techniques of fluorescein angiography, histology and scanning electron microscopy (SEM) of vascular corrosion casts. RESULTS: Fluorescein angiography revealed the pits of the optic disk ...
Shakoor Akbar - - 2005
PURPOSE: To demonstrate the capability of our optical imaging system to assess oxygenation changes in chorioretinal vasculatures due to experimentally induced carotid occlusion. METHODS: Chorioretinal oxygenation was assessed by projecting a narrow laser line at an angle on the retina after intravenous injection of an oxygen sensitive probe and imaging ...
Tedeschi-Reiner Eugenia - - 2005
The aim of this study was to explore the relation between atherosclerosis of the retinal arteries and the extent and severity of coronary artery disease (CAD). In 109 patients, aged 40 to 80 years, who underwent coronary angiography for suspected CAD, the degree of retinal arterial atherosclerosis (stages 1 to ...
Kunikata Hiroshi - - 2006
PURPOSE: To report a case in which a prophylactic embolization of a feeder artery to an intarcranial meningioma led to an occlusion of a cilioretinal artery. DESIGN: A case report. METHODS: A 48-year-old man with an intracranial meningioma presented with ocular pain and visual loss in his right eye following ...
Ozer Tulay - - 2006
PURPOSE: To evaluate the hemodynamic changes in the extraocular orbital vessels of the patients with chronic obstructive pulmonary disease (COPD), using color Doppler ultrasonography (CDU) technique, and to compare the results with those of healthy control subjects. METHODS: Forty-five patients with COPD and 17 healthy control subjects were included in ...
Takaya Kaori - - 2006
BACKGROUND: We encountered obvious arterial bleeding from the incision site during radial optic neurotomy (RON) in a 55-year-old woman with central retinal vein occlusion (CRVO) and report the findings herein. CASE REPORT: The patient initially demonstrated a retinal hemorrhage and macular edema due to a left CRVO. Her corrected visual ...
Palmowski-Wolfe Anja M - - 2005
PURPOSE: To assess, if a slow multifocal stimulus (mfS) can provoke a perfusion response that can be measured with the Retinal Vessel Analyzer (RVA). METHODS: Seventeen eyes were examined. Pupils were dilated. A 120-second baseline recording was obtained with the RVA. The subject then turned to view an mfS for ...
Ito Yoshikazu - - 2005
OBJECTIVE: To study the effects of segmental scleral buckling without encircling procedures on retrobulbar hemodynamic conditions using color Doppler imaging. METHODS: In 65 consecutive eyes of 65 patients with unilateral rhegmatogenous retinal detachment repaired by scleral buckling, we prospectively measured the blood flow velocities in the ophthalmic artery, central retinal ...
Kocabiyik Necdet - - 2005
In this study, we aimed to investigate some features of the central retinal artery (CRA), which supplies the internal aspect of the retina. The CRA is the main vessel supplying blood to the retina. The origin, course and penetration point of the optic nerve by the CRA were studied in ...
Marinković Slobodan - - 2005
OBJECTIVE: Intraventricular surgery requires a detailed knowledge of the microanatomy of the choroid plexus vasculature. METHODS: Twenty choroid plexuses were microdissected, and two additional plexuses were prepared for microscopic examination. RESULTS: The choroid plexus was perfused primarily by the anterior choroidal artery (AChA) and the lateral posterior choroidal artery (LPChA). ...
Hayreh Sohan Singh - - 2005
Acute retinal vascular occlusive disorders collectively constitute one of the major causes of blindness or seriously impaired vision, and yet there is marked controversy on their pathogeneses, clinical features and particularly their management. This is because the subject is plagued by multiple misconceptions. These include that: (i) various acute retinal ...
Claxton Suzanne - - 2005
The mechanisms that control differentiation of immature blood vessels into either arteries or veins are not well understood. Because oxygen tension in arteries is higher than in veins, oxygen has the potential to be an instructive signal for artery/vein (AV) differentiation. We test this hypothesis by exposing newborn mice to ...
Colucciello Michael - - 2005
In a previous article (July 2004, page 57), Dr Colucciello reviewed nonproliferative and proliferative diabetic retinopathy. In this article, he discusses retinal vascular disease associated with hypertension, which is especially likely to occur in persons with vasculopathic risk factors. Retinal vein occlusion, retinal arterial macroaneurysm, retinal artery occlusion, and carotid ...
Mori Keisuke - - 2005
PURPOSE: To compare the angioarchitecture of choroidal arteries and veins in patients with age-related macular degeneration (AMD) to the angioarchitecture of age-matched normal subjects using indocyanine green (ICG) angiography. METHODS: ICG angiography was performed in 35 consecutive AMD patients and 18 normal age-matched volunteers with a fundus ICG camera. ICG ...
Huber K K - - 2005
To investigate the effect of retrobulbar and subconjunctival anaesthesia on retrobulbar haemodynamics by colour Doppler imaging. 39 patients (mean age 71 (SD 9) years; 19 females, 20 males) undergoing planned cataract surgery were included in the prospective study. Colour Doppler imaging (Siemens Sonoline Sienna, Germany) was performed before, directly after ...
Schwenn Oliver K - - 2005
PURPOSE: There is some evidence to suggest that thrombolysis has a beneficial effect in retinal vessel occlusion. However, there is concern that this therapeutic approach carries the risk of hemorrhage. Retrograde cannulation of the supraorbital arteries followed by irrigation with fibrinolytic agents may have the potential to minimize the risk ...
Noguchi Akio - - 2005
The authors present a modification to a previously reported supraorbital craniotomy procedure that is smaller, simpler, safe, and cosmetically pleasing. Minimal brain retraction is used without compromising the surgical exposure of the orbital roof, floor of the anterior fossa, and the parasellar region to treat tumoral lesions that are located ...
Marinković Slobodan - - 2005
BACKGROUND: Scarce information about the anatomy of the subependymal arteries (SEAs) is present in the scientific literature. METHODS: Twenty cerebral hemispheres with injected arteries were microdissected, and the magnetic resonance imaging scans of 100 patients with lacunar infarcts were examined. RESULTS: The SEAs were found to range in diameter from ...
Birol Gülnur - - 2005
This study investigated the changes in pH during retinal artery occlusion by means of extracellular H+ concentration ([H+]o) measurements in the retina under both air and 100% O2 ventilation. Occlusion was produced in intact anesthetised cats by pressing with a probe onto a retinal artery. [H+]o profiles were recorded across ...
Lai Cheong J E - - 2005
A 55 year old woman, known to have systemic lupus erythematosus and protein S deficiency, presented with sudden onset of visual loss in the left eye. Three days previously, she took a herbal phytoestrogen preparation for relief of her menopausal symptoms. Ophthalmological assessment showed a left inferior hemiretinal vein thrombosis. ...
Zaninetti Marc - - 2005
BACKGROUND: Central retinal vein occlusion is a relatively common retinal disorder in the elderly, and those with cardiovascular or thrombophilic risk factors are at increased risk. Although still unsatisfying, some treatments for the acute and chronic phases have been established based on randomized studies. However, for rare conditions mimicking central ...
Shah S P - - 2005
PURPOSE: To report a case of acute retinal necrosis presenting as central retinal artery occlusion with cilioretinal sparing. METHODS: Single interventional case report. The findings of the ophthalmic examination, MRI, blood parameters, biopsy results and clinical course are reported. RESULTS: A forty two year old gentleman reporting sudden loss of ...
Hayashi Kengo - - 2005
BACKGROUND: Indocyanine green angiography revealed a markedly bent and tortuous choroidal artery in the macula of the left fundus in a highly myopic patient. CASE: The patient's corrected visual acuity was 1.0 in both eyes, and he had no visual symptoms. OBSERVATIONS: Ten years after the initial examination, atrophy of ...
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