نتایج جستجو برای: vitreous

تعداد نتایج: 7050  

Journal: :Transactions of the American Ophthalmological Society 2005
J Sebag

PURPOSE Pharmacologic vitreolysis is a promising new therapy to improve vitreoretinal surgery and, ultimately, prevent disease by mitigating the contribution of vitreous to retinopathy. The mechanism of action of the agents being developed for pharmacologic vitreolysis remains unclear. The experiments in this thesis test the hypothesis that pharmacologic vitreolysis agents break down vitreous m...

Journal: :Japanese journal of ophthalmology 1997
T Hikichi J Akiba N Ueno A Yoshida B Chakrabarti

To determine the mechanisms of vitreous liquefaction following vitreous hemorrhage, we investigated the effects of the free radicals produced by a bilirubin-sensitized photochemical reaction on collagen and hyaluronic acid (HA). Bovine vitreous collagen and HA were irradiated by visible light in the presence of bilirubin, which is produced from the degradation of hemoglobin, as a photosensitize...

Journal: :بینا 0
علیرضا مالکی ar maleki زاهدان- بیمارستان چشم پزشکی الزهرا (س) تقی ناصرپور فریور t naserpoor farivar زاهدان- بیمارستان چشم پزشکی الزهرا (س) علی توللی a tavallali زاهدان- بیمارستان چشم پزشکی الزهرا (س)

purpose: to ascertain whether the use of nested-pcr (nested polymerase chain reaction) technique leads to more rapid and accurate diagnosis of bacterial endophthalmitis. methods: the aqueous humor and vitreous samples of 24 eyes of 24 patients with bacterial endophthalmitis were evaluated by microscopy, diagnostic aerobic culture, and nested- pcr to detect the infectious agent. results: aerobic...

Journal: :Archives of ophthalmology 1999
J R Ferencz E I Assia L Diamantstein E Rubinstein

OBJECTIVES To measure the concentrations of vancomycin in the vitreous of patients with postoperative endophthalmitis after administration of 1 g of vancomycin hydrochloride intravenously and injection of 1 mg of vancomycin hydrochloride into the vitreous, and to determine whether these concentrations are adequate for treatment of gram-positive infections. METHODS Patients with acute postoper...

2014
Seung Jae Lee Young Don Kim Haksu Kyung

Dear Editor, Rupture of the posterior capsule and prolapse of the vit-reous body are relatively common complications of cataract surgery. When posterior capsule rupture (PCR) occurs, the vitreous body prolapsed into anterior chamber should be removed completely. However, the surgical procedure to remove the vitreous body is difficult and troublesome because the vitreous structure is transparent...

2008
MYOUNGJOO PARK TAKASHI SHIMADA YOICHIROU MATUO YOKO AKIYAMA YOSHINOBU IZUMI SHIGEHIRO NISHIJIMA

Human being gets about 90% of the information via visual sense[1,2]. Therefore, it is generally thought that the sight greatly influences the QOL (quality of life) of people. It is a vitreous body to take an important role to obtain visual information[3]. The vitreous body, which holds about 80% of the volume of the eyeball, is located between the crystalline lens, a ciliary body and the retina...

Journal: :The British journal of ophthalmology 2004
H Funatsu H Yamashita H Noma T Mimura K Sakata S Hori

AIMS To ascertain whether measurement of the vitreous fluid levels of vascular endothelial growth factor (VEGF) or angiotensin II (Ang II) could predict the outcome of vitreous surgery in patients with proliferative diabetic retinopathy (PDR). METHODS A prospective observational case study was performed in 61 consecutive patients (61 eyes) with PDR who underwent vitreoretinal surgery. Vitreou...

2010
Sadri Chahed Aurélie S. Leroyer Mounir Benzerroug David Gaucher Adriana Georgescu Serge Picaud Jean-Sébastien Silvestre Alain Gaudric Alain Tedgui Pascale Massin Chantal M. Boulanger

OBJECTIVE Diabetic retinopathy is associated with progressive retinal capillary activation and proliferation, leading to vision impairment and blindness. Microparticles are submicron membrane vesicles with biological activities, released following cell activation or apoptosis. We tested the hypothesis that proangiogenic microparticles accumulate in vitreous fluid in diabetic retinopathy. RESE...

Arya Hedjazi Daniel Zarif Hamideh Ghorbani,

Background: Many studies have been done in order to interpret correctly the results of ethanol analysis and its related problems. Unfortunately, it was not easy to determine BAC rate, due to postmortem different conditions or personal and clinical differences in metabolism and excretion of ethanol. The time between death and autopsy, the environmental conditions (temperature and humidity) are i...

Journal: :Investigative ophthalmology & visual science 1989
B Kirchhof E Kirchhof S J Ryan N Sorgente

Retinal pigment epithelial (RPE) cell migration and proliferation are believed to play a role in the pathogenesis of proliferative vitreoretinopathy (PVR). Since PVR develops in situations where vitreous contacts the RPE, we sought to determine whether human vitreous contains factors that stimulate proliferation and migration of RPE cells. We found that postmortem human vitreous stimulates migr...

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