Publications by authors named "Chang-guan Wang"

Purpose: To characterize the classification, incidence, diagnosis and prognosis of traumatic choroidal injuries.

Methods: Subjects were selected from the database of the Eye Injury Vitrectomy Study (EIVS) and were examined for occurrences of different categories of choroidal injuries. Standard photographs were collected.

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Article Synopsis
  • Younger patients with proliferative diabetic retinopathy (PDR) often show more aggressive disease than older patients, and the effects of preoperative anti-VEGF therapy on young diabetics have been under-researched.
  • This study compared young patients (<40 years old) undergoing vitrectomy surgery with or without ranibizumab pretreatment, analyzing factors like surgical time and bleeding during the procedure.
  • Results indicated that ranibizumab pretreatment led to significantly less intraoperative bleeding and shorter surgery time, but did not impact other surgical complications, which were more influenced by the complexity of the cases.
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Purpose: To study the change of concentrations of vascular endothelial growth factor (VEGF) in vitreous cavity after vitrectomy in eyes with proliferative diabetic retinopathy (PDR).

Methods: In this retrospective study, intravitreal fluid samples were taken at baseline (beginning of the vitrectomy) and postoperatively (several days later after vitrectomy) at the time of prophylactic injection of bevacizumab in forty-eight eyes of forty-eight patients with PDR. Postvitrectomy fluid samples were divided into four groups according to the time interval between the vitrectomy and the injection (group 1, 3-5 days; group 2, 6-10 days; group 3, 11-15 days; group 4, 16-21 days; twelve eyes in each group).

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An 80 year-old male patient was prescribed a bandage contact lens on the left eye 5 years ago because of an injury on the eye by a wooden stick. He was never followed up to remove the contact lens. Two years ago, he suffered from gradually decreased visual acuity in the left eye.

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In the article, the development of medical treatment for eye injuries in the mainland of China was reviewed. According to the data provided in Eye Injury Vitrectomy Study (EIVS), 27% of 72 eyes with no light perception (NLP) gained recovery in term of antomy and visual function. Vitrectomy initiated at more than 4 weeks after open eye injury is an independent risk factor for developing PVR.

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Background: The objective of the study was to delineate clinical characteristics, surgical interventions, anatomic and visual outcomes of ruptured eye balls after trauma, and establish the prognostic indicators, which can assist clinicians in making correct surgical decisions during globe exploration for ruptured eyes.

Design: The study design used was a multicentre prospective cohort study, including six university-affiliated tertiary hospitals.

Participants: We selected 242 cases of ruptured globe from the Eye Injury Vitrectomy Study database, until 31 December 2012.

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In this case series of 74 patients with coexisting vitreoretinal injury and severe corneal opacification, after temporary keratoprosthesis (TKP) assisted pars plana vitrectomy (PPV), an allograft corneal transplant was not performed at the same time; instead, the patient's trephined corneal button was sutured back. One year after the surgery, if intraocular pressure of the injured eyes was above 8 mmHg, removing silicone oil was attempted, and penetrating keratoplasty could be performed. Finally, 10 eyes (13.

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Objective: To evaluate the prognosis of traumatic eyes with no light perception post vitrectomy, and to analyze the risk factors influencing the final results.

Methods: Five hundred and ninety nine mechanically injured eyes in 577 patients undergone vitrectomy were registered from 1999 - 2004. Thirty-eight eyes in this group showed no light perception in initial visual examination.

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Objective: To summarize the clinical results of the artificial iris diaphragm (AID implantation for eyes with silicone oil longstanding tamponade.

Methods: In this study the operation indications results and complications of 11 consecutive cases of artificial iris diaphragm implantation for eyes with silicone oil longstanding tamponade were studied.

Results: In all of the 11 primary ocular disorder cases, 7 cases (7/11) were serious ocular trauma, 2(2/11)cases were diabetic retinopathy with traction retinal detachment, 1 case (1/11) was recurrent retinal detachment with complicated PVR, and 1 case (1/11) was Coats disease; The silicone oil was retained completely behind the surface of artificial iris diaphragm in 7(7/11) of all the 11 cases in which no visual acuity was affected The complications were low intraocular pressure IOP and heavy fibrosis on the surface of artificial iris diaphragm.

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Objective: To develop a new photochemical method of experimental retinal vein occlusion and investigate the morphologic and histologic changes in the retina.

Methods: After intravenous injection of rose Bengal, the vessels next to the disc of miniature pigs in the experiment group (n = 15) were exposed to an endo-illuminator for 15 minutes. As a control group, the vessels next to the disc of each pig were exposed to the endo-illuminator without rose Bengal injection.

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Overexpression of vascular endothelial growth factor (VEGF) has been strongly implicated in the development of choroidal neovascularization (CNV) in patients with age-related macular degeneration. In this study, a phosphorothioate oligonucleotide (PS-oligo) targeting both human and rat VEGF(165) genes upstream of the translation initiation code, named DS135 in this study, was evaluated for its uptake dynamics and retinal tolerance after intravitreal (IV) and subretinal (SR) injections in the rhesus monkey. Intravitreal and SR injections of a fluorescent-labeled DS135 (FL-DS135) resulted in both dose- and time-dependent uptake and persistence, and FL-DS135 remained detectable in the retina for at least 3 weeks after injection.

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