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Anterior ciliary arteries

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https://www.readbyqxmd.com/read/29625480/microvascular-density-is-associated-with-retinal-ganglion-cell-axonal-volume-in-the-laminar-compartments-of-the-human-optic-nerve-head
#1
Min H Kang, Mengchen Suo, Chandrakumar Balaratnasingam, Paula K Yu, William H Morgan, Dao-Yi Yu
Purpose: To quantify associations between microvascular density and retinal ganglion cell (RGC) axonal volume in the laminar compartments of the human optic nerve head (ONH). Methods: Eleven normal human ONHs were evaluated. Antibodies were used to label the vascular endothelium (factor VIII-related antigen/von Willebrand factor antibody) and RGC axons (neurofilament heavy antibody). Three-dimensional analysis of confocal scanning laser microscope images was used to study microvascular density and RGC axonal volume in the prelaminar, anterior lamina cribrosa, posterior lamina cribrosa, and retrolaminar compartments...
March 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29570457/a-scalable-and-deformable-stylized-model-of-the-adult-human-eye-for-radiation-dose-assessment
#2
Daniel El Basha, Takuya Furuta, Siva S R Iyer, Wesley E Bolch
With recent changes in the recommended annual limit on eye lens exposures to ionizing radiation, there is considerable interest in predictive computational dosimetry models of the human eye and its various ocular structures including the crystalline lens, ciliary body, cornea, retina, optic nerve, and central retinal artery. Computational eye models to date have been constructed as stylized models, high-resolution voxel models, and polygon mesh models. Their common feature, however, is that they are typically constructed of nominal size and of a roughly spherical shape associated with the emmetropic eye...
March 23, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29546060/acute-effect-of-hypervolemic-hemodilution-on-retrobulbar-hemodynamics-in-anterior-ischemic-optic-neuropathy
#3
Marion Bienert, Niklas Plange, Andreas Remky, Kay Oliver Arend, David Kuerten
Purpose: Ischemic ocular disorders may be treated by hypervolemic hemodilution. The presumed therapeutic benefit is based on a volume effect and improved rheological factors. The aim was to investigate the acute effect of intravenous hydroxyethyl starch on retrobulbar hemodynamics in patients with nonarteritic anterior ischemic optic neuropathy (NAION). Methods: 24 patients with acute NAION were included. Retrobulbar hemodynamics were measured using color Doppler imaging before and 15 min after intravenous infusion of 250 cc 10% hydroxyethyl starch (HES)...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29442245/retrobulbar-and-intraocular-blood-flow-in-anterior-ischaemic-optic-neuropathy-are-linked-to-the-functional-impairment
#4
David Kuerten, Matthias Fuest, Marion Bienert, Niklas Plange
PURPOSE: Evaluation of ocular haemodynamics in patients with acute non-arteritic anterior ischaemic optic neuropathy (NAION) by colour Doppler imaging and fluorescein angiography and correlation of blood flow parameters to visual field loss and visual acuity. METHODS: Blood flow velocities (peak systolic velocity (PSV), end-diastolic velocity (EDV)) of the ophthalmic artery (OA), central retinal artery (CRA) and nasal and temporal posterior ciliary arteries (PCAs) were measured via colour Doppler imaging...
February 13, 2018: International Ophthalmology
https://www.readbyqxmd.com/read/29350685/re-orchestration-of-blood-flow-by-micro-circulations
#5
P A R Meyer
Haemoglobin Video Imaging (HVI) demonstrates conjunctival and episcleral blood flow in man with the resolution of a single erythrocyte. A new method for establishing vessel hierarchy in micro-circulations is described, which recognises either delivery or drainage vessels and references vessel order to the capillary. These tools have been used to characterise blood flow.Anterior ciliary arteries show pulsatile variation in diameter. The episcleral arterial circle that they supply has functional apices with pulsatile flow reversal...
February 2018: Eye
https://www.readbyqxmd.com/read/29231483/-efficacy-on-visual-display-terminal-syndrome-treated-with-jingjin-therapy-of-zhuang-medicine
#6
Linping Zhu, Jinping Yang, Xiyue Yang, Feng Qin, Dongping Wu, Gelang Huang
OBJECTIVE: To observe the efficacy and explore the effect mechanism on visual display terminal syndrome treated with jingjin therapy of Zhuang medicine. METHODS: Sixty-five patients of visual fatigue induced by the visual display terminal operation were treated with jingjin trigeminy therapy of Zhuang medicine, e.g. massage manipulation, acupuncture and cupping; acting on the specific stimulating areas in Zhuang medicine, relevant with orbit, temple, forehead, ear and Baihui (GV 20)...
February 12, 2017: Zhongguo Zhen Jiu, Chinese Acupuncture & Moxibustion
https://www.readbyqxmd.com/read/28974214/idiopathic-pigmented-vitreous-cyst-without-autofluorescence-a-case-report
#7
Jing Lu, Yan Luo, Lin Lu
BACKGROUND: Vitreous cysts are rare clinical findings and seldom cause visual disturbance. They are generally classified as congenital or acquired and are considered idiopathic when the etiology can not be determined. A previous electron microscopic observation on an idiopathic pigmented vitreous cyst has confirmed its pigment epithelial origin. However, the specific kind of pigment epithelium involved remains unclear. CASE PRESENTATION: A 39-year-old female presented with a round-shaped floater causing frequent visual disturbance in the left eye...
October 3, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28884793/using-vascular-landmarks-to-orient-3d-optical-coherence-tomography-images-of-the-mouse-eye
#8
Mark P Krebs
Comparing 3D structural information obtained by optical coherence tomography (OCT) requires accurate alignment of images acquired from individual subjects. Despite the widespread use of OCT to image the anterior and posterior mouse eye, few approaches to align the resulting image data have been described, in part due to a lack of well-characterized landmarks that are suitable for alignment. Here, we provide an OCT acquisition and analysis protocol that incorporates the use of the long posterior ciliary arteries as landmarks...
September 8, 2017: Current Protocols in Mouse Biology
https://www.readbyqxmd.com/read/28469483/correlation-between-ischemic-retinal-accidents-and-radial-peripapillary-capillaries-in-the-optic-nerve-using-optical-coherence-tomographic-angiography-observations-in-6-patients
#9
Marta Cerdà-Ibáñez, Antonio Duch-Samper, Rodrigo Clemente-Tomás, Raúl Torrecillas-Picazo, Noemí Ruiz Del Río, Laura Manfreda-Dominguez
BACKGROUND: Perfusion of the optic nerve has been widely studied using fluorescein angiography (FAG), which is currently regarded as the criterion standard. However, FAG has adverse effects associated with intravenous contrast administration and is limited in its capacity to characterize and stratify the different vascular layers of the optic nerve and retina. The use of new imaging techniques, such as optical coherence tomographic angiography (Angio-OCT), is therefore important. AIM: A qualitative description is made of the vascular layers of the optic nerve and of how vascular events affect radial peripapillary capillaries (RPC)...
2017: Ophthalmology and Eye Diseases
https://www.readbyqxmd.com/read/28355700/-effects-of-video-work-on-the-ocular-vascular-hemodynamic-and-visual-of-the-operators
#10
J P Yang, L P Zhu, Z L Zhang, X Y Huang
Objective: To investigate the effects of long time video display terminal (VDT) operation on the ocular vascular hemodynamic and visual acuity. Methods: During March and October 2015, 120 cases of video monitoring warriors were selected as study group, another 155 cases of logistics personnel as the control group. The low vision of the two groups was calculated and compared, and the color Doppler flow imaging was used to measure the central retinal artery (CRA) , short posterior ciliary artery (SPCA) , anterior ciliary artery (ACA) , (peak systolic velocity, PSV) , end diastolic velocity (EDV) and (resistance index (RI) ...
February 20, 2017: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/28302322/high-risk-histopathology-features-in-primary-and-secondary-enucleated-international-intraocular-retinoblastoma-classification-group-d-eyes
#11
Ido D Fabian, Andrew W Stacey, Tanzina Chowdhury, Catriona Duncan, Esin K Karaa, Irene Scheimberg, M Ashwin Reddy, Mandeep S Sagoo
PURPOSE: To evaluate the rate and identify the risk factors for high-risk histopathologic features in group D retinoblastoma eyes enucleated as primary or secondary treatment. DESIGN: Retrospective analysis. PARTICIPANTS: A total of 64 enucleated group D eyes (62 patients), of which 40 (40 patients) were primary and 24 (22 patients) were secondary to other treatments. METHODS: Clinicopathologic correlation of consecutive group D eyes enucleated from 2002 to 2014...
June 2017: Ophthalmology
https://www.readbyqxmd.com/read/28117076/oct-angiography-of-acute-non-arteritic-anterior-ischemic-optic-neuropathy
#12
M-B Rougier, M-N Delyfer, J-F Korobelnik
PURPOSE: To describe changes of the retinal peripapillary microvasculature on optical coherence tomography angiography (OCT-A) in non-arteritic anterior ischemic optic (NAION) neuropathy. METHODS: Observational study of 10 patients at the acute phase of NAION. OCT-A was performed using a 3mm×3mm square centered on the optic disc (Cirrus HD-OCT with Angioplex, Carl Zeiss Meditec, Dublin, CA). A qualitative comparison was made with the healthy fellow eye of each patient...
February 2017: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/28029908/pathology-of-ischemic-optic-neuropathy
#13
REVIEW
Hershel R Patel, Curtis E Margo
Ischemic optic neuropathy (ION) describes a state of hypoxic injury of the optic nerve. Clinically, ION is divided into anterior and posterior forms defined by the presence or absence of optic disc swelling, respectively. It is further classified as arteritic when secondary to vasculitis, and nonarteritic when not. The site of vascular occlusion for anterior ION from giant cell arteritis is the short posterior ciliary arteries, but mechanical vascular obstruction does not play a role in most nonarteritic cases...
January 2017: Archives of Pathology & Laboratory Medicine
https://www.readbyqxmd.com/read/27922054/first-insight-into-the-proteome-landscape-of-the-porcine-short-posterior-ciliary-arteries-key-signalling-pathways-maintaining-physiologic-functions
#14
Caroline Manicam, Natarajan Perumal, Norbert Pfeiffer, Franz H Grus, Adrian Gericke
Short posterior ciliary arteries (sPCA) provide the major blood supply to the optic nerve head. Emerging evidence has linked structural and functional anomalies of sPCA to the pathogenesis of several ocular disorders that cause varying degrees of visual loss, particularly anterior ischaemic optic neuropathy and glaucoma. Although the functional relevance of this vascular bed is well-recognized, the proteome of sPCA remains uncharacterized. Since the porcine ocular system closely resembles that of the human's and is increasingly employed in translational ophthalmic research, this study characterized the proteome of porcine sPCA employing the mass spectrometry-based proteomics strategy...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27642593/improvement-in-cerebral-and-ocular-hemodynamics-early-after-carotid-endarterectomy-in-patients-of-severe-carotid-artery-stenosis-with-or-without-contralateral-carotid-occlusion
#15
Jian Wang, Weici Wang, Bi Jin, Yanrong Zhang, Ping Xu, Feixiang Xiang, Yi Zheng, Juan Chen, Shi Sheng, Chenxi Ouyang, Yiqing Li
Purpose. To investigate the alternation in cerebral and ocular blood flow velocity (BFV) in patients of carotid stenosis (CS) with or without contralateral carotid occlusion (CO) early after carotid endarterectomy (CEA). Patients and Methods. Nineteen patients underwent CEA for ≥50% CS. Fourteen patients had the unilateral CS, and five patients had the ipsilateral CS and the contralateral CO. Transcranial Doppler (TCD) and Color Doppler Imaging (CDI) were performed before and early after CEA. Results. In patients with unilateral CS, significant improvements in BFV were observed in anterior cerebral artery (ACA) and middle cerebral artery (MCA) on the ipsilateral side after CEA...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27516038/clinical-and-color-doppler-imaging-features-of-one-patient-with-occult-giant-cell-arteritis-presenting-arteritic-anterior-ischemic-optic-neuropathy
#16
Dragoş Cătălin Jianu, Silviana Nina Jianu, Ligia Petrica, Andrei Gheorghe Marius Motoc, Traian Flavius Dan, Dorela CodruŢa Lăzureanu, Mihnea Munteanu
Anterior ischemic optic neuropathies (AIONs) represent a segmental infarction of the optic nerve head (ONH) supplied by the posterior ciliary arteries (PCAs). Blood supply blockage can occur with or without arterial inflammation. For this reason, there are two types of AIONs: non-arteritic (NA-AION), and arteritic (A-AION), the latter is almost invariably due to giant cell arteritis (GCA). GCA is a primary vasculitis that predominantly affects extracranial medium-sized arteries, particularly the branches of the external carotid arteries (including superficial temporal arteries - TAs)...
2016: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/27220710/-apply-of-retcam-%C3%A2-and-color-doppler-imaging-in-persistent-hyperplastic-primary-vitreous
#17
Mei Han, Kanxing Zhao, Tongmei Zhang, Yan Li, Jianmin Gao, Liu Dong
OBJECTIVE: To observe the manifestations of RetCam Ⅱ and color Doppler imaging (CDI) in a retrospective case series of persistent hyperplastic primary vitreous (PHPV). METHODS: Retrospective study. The medical records of 9 eyes/9 patients with PHPV went through RetCamⅡ and CDI from 2009 to 2014. RESULTS: There were 6 young boys and 3 young girl in this study, age from 2 months to 5 years. All the patients were born at full term. 9 eyes had complication (cataract)...
May 2016: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/26335631/intracellular-cytoskeleton-and-junction-proteins-of-endothelial-cells-in-the-porcine-iris-microvasculature
#18
Hongfang Yang, Paula K Yu, Stephen J Cringle, Xinghuai Sun, Dao-Yi Yu
Recently we reported studies of the iris microvasculature and its endothelial cells using intra-luminal micro-perfusion, fixation, and silver staining, suggesting that the iris vascular endothelium may be crucial for maintaining homeostasis in the ocular anterior segment. Here we present information regarding the intracellular structure and cell junctions of the iris endothelium. Thirty-seven porcine eyes were used for this study. The temporal long posterior ciliary artery was cannulated to assess the iris microvascular network and its endothelium using intra-luminal micro-perfusion, fixation, and staining with phalloidin for intracellular cytoskeleton f-actin, and with antibodies against claudin-5 and VE-cadherin for junction proteins...
November 2015: Experimental Eye Research
https://www.readbyqxmd.com/read/26334520/anterior-segment-seeding-in-eyes-with-retinoblastoma-failing-to-respond-to-intraophthalmic-artery-chemotherapy
#19
Efthymia Pavlidou, Christopher Burris, Caroline Thaung, Irene Scheimberg, Judith Kingston, John L Hungerford, M Ashwin Reddy, Mandeep S Sagoo
IMPORTANCE: Anterior chamber seeding following intraophthalmic artery chemotherapy is rarely reported. OBJECTIVES: To describe clinicopathologic observations in eyes in which intraophthalmic artery chemotherapy for retinoblastoma failed and to report anterior chamber involvement. OBSERVATIONS: A retrospective case series of 12 enucleated eyes (11 patients) with retinoblastoma refractory to intraophthalmic artery chemotherapy between March 1, 2010, and October 31, 2013, at University College London Institute of Ophthalmology and the Retinoblastoma Service, Royal London Hospital...
December 2015: JAMA Ophthalmology
https://www.readbyqxmd.com/read/26234004/amaurosis-fugax-anterior-ischemic-optic-neuropathy-and-cilioretinal-artery-occlusion-secondary-to-giant-cell-arteritis
#20
Oriel Spierer, Michael Waisbourd
No abstract text is available yet for this article.
June 2015: Israel Medical Association Journal: IMAJ
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