Yonghao Li

Sun Yat-Sen University, Shengcheng, Guangdong, China

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Publications (6)2.93 Total impact

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    ABSTRACT: : To investigate the characteristics of rhegmatogenous retinal detachment associated with choroidal detachment (RRDCD) in a Chinese population by using ultrasound biomicroscope (UBM). : A random prospective study was used to assess 1,389 patients (1,408 eyes) with rhegmatogenous retinal detachment. Comprehensive standardized ophthalmic examinations included intraocular pressure (IOP) by Goldmann applanation tonometer and the entire ocular fundus by Goldmann three-mirror lens, B-type ultrasound, and UBM. : A total of 1,389 patients with rhegmatogenous retinal detachment participated in the study, including 906 men and 483 women. Two hundred and sixty-three eyes (18.79%) had RRDCD and the age of patients ranged from 9 to 82 years (median, 50.8 ± 17.7 years). Patients with high myopia (-6.00 diopters or more) represented 31.94% and more frequently experienced low intraocular pressure and multiple retinal breaks. In 263 RRDCD eyes, the results of UBM showed that ranges of choroidal detachment (CD) were <1 quadrant in 9 (3.42%) eyes, from 1 to 2 quadrants in 37 (14.07%) eyes, from 2 to 3 quadrants in 13 (4.94%) eyes, and from 3 to 4 quadrants in 204 (77.57%) eyes. ultrasound biomicroscope also showed that the angular ranges of CD were between 3.31° and 45.65° (mean, 15.98 ± 9.29°). In addition, UBM showed the mean values of CD angle for the superior (15.42 ± 9.40°), nasal (14.08 ± 8.66°), inferior (15.03 ± 9.05°), and temporal (15.96 ± 9.22°) sides. No statistically significant differences were found among any of these comparisons (F value = 2.011, P > 0.05). : Retinal detachment associated with CD occurs more frequently in older people or in patients with high myopia, who usually present with low intraocular pressure and multiple retinal breaks. UBM examination can reduce false-negative rate of RRDCD, determine CD degree quantitatively, and guide classification and treatment. UBM combined with B ultrasound testing can provide a precise diagnosis of rhegmatogenous retinal detachment degree and may have important clinical significance for preoperative diagnosis of anterior proliferative vitreoretinopathy and determining operative strategy and postoperative prognosis.
    Retina (Philadelphia, Pa.) 05/2012; 32(10):2020-5. · 2.93 Impact Factor
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    ABSTRACT: Vitreous amyloidosis is a rare condition that mainly occurs in Familial Amyloidotic Polyneuropathy (FAP). In some cases, it may be the only symptom without systemic disorders. One case of familial vitreous amyloidosis was reported here, with white, wispy opacities in vitreous cavity in both eyes. Pars plana vitrectomy and histopathological examination of the vitreous specimens were performed. The vitreous specimens showed typical microscopic features of amyloidosis with Congo red stain and non-branching fibrils on a transmission electron microscope. Transthyretin (TTR) gene was amplified with DNA isolated from the peripheral blood cells. Bi-directional sequencing of exon 3 showed a single base-pair substitution, which results in an amino acid substitution at position83, glycine to arginine (TTR Arg-83). TTR Arg-83 may be a new pathologic mutation in vitreous amyloidosis.
    Yan ke xue bao = Eye science / "Yan ke xue bao" bian ji bu 04/2008; 24(1):65-7.
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    ABSTRACT: To investigate the levels of stromal cell-derived factor-1 (SDF-1) and vascular endothelial growth factor (VEGF) in the vitreous of patients with proliferative diabetic retinopathy. The levels of SDF-1 and VEGF in the vitreous of 30 eyes of 30 patients with proliferative diabetic retinopathy (PDR) and 12 eyes of 12 patients with idiopathic macular hole (MH) were measured by enzyme-linked immunosorbent assay. Vitreous fluid samples were obtained by vitrectomy. The vitreous concentration of VEGF was significantly higher in eyes with PDR (2,865.87 +/- 387.85 pg/ml) than in eyes with idiopathic macular hole (142.42 +/- 21.03 pg/ml, P < 0.0001). The vitreous level of SDF-1 was also significantly higher in eyes with PDR (298.40 +/- 24.57 pg/ml) than in eyes with idiopathic macular hole (86.91 +/- 15.89 pg/ml, P < 0.0001). The vitreous concentration of SDF-1 correlated significantly with that of VEGF in eyes with PDR ([correlation coefficient] r = 0.62, P < 0.001). Vitreous levels of both SDF-1 and VEGF in patients with PDR are significantly higher than those of nondiabetic patients. SDF-1 may be correlated with VEGF in angiogenesis in PDR.
    Yan ke xue bao = Eye science / "Yan ke xue bao" bian ji bu 03/2008; 24(1):6-8.
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    ABSTRACT: To evaluate the nibble technology in the therapy of diabetic retinopathy. Eighty-three patients (ninety-two eyes) with proliferative diabetic retinopathy were treated in our department. All the patients received a standard pars plana vitrectomy. Fifty-two of them (fifty-eight eyes) were treated with nibble technology, while the other thirty-one (thirty-four eyes), who were treated with common procedure to tear the proliferative membrane, were served as a control group. The operative complication of iatrogenic retinal tears was observed in 2 eyes of the test group and 7 eyes of the control group (P < 0.05). Another operative complication of hemorrhage was observed in 4 eyes of the test group and 15 eyes of the control group (P < 0.01). There were 6 eyes of the test group and 5 eyes of the control group presented with grade-III postoperative responds (P > 0.01). The nibble technology is safe in the therapy of proliferative diabetic retinopathy and could reduce the complications during or after the operation.
    Yan ke xue bao = Eye science / "Yan ke xue bao" bian ji bu 10/2006; 22(3):147-8, 153.
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    ABSTRACT: To obtain the gene encoding retinal specific Rho promoter therefore to prepare for exogenous gene transcription and expression in retina. Extract the genomic DNA of a BLAB/c mice . The Rho promoter DNA were then amplified by PCR, the product of which was subcloned into PcDNA3.1 +vector. After identification by restriction enzymes, the recombinant PcDNA3.1+vectors were subjected to sequence analysis. The fragments of the promoter as amplified by PCR were of predicted length. Digestion with HindIII and NheI proved correct insertion of the target fragments with expected length into the recombinant PcDNA3.1+vectors. As indicated by homology analysis the Rho promoter was highly conservative, and the Rho promoter we got had hole homology as reported by Boulanger A etc. Retinal specific Rho promoter has been successfully cloned, thus making possible the subsequent research as the mechanism and gene therapy of retina.
    Yan ke xue bao = Eye science / "Yan ke xue bao" bian ji bu 07/2005; 21(2):119-21.
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    ABSTRACT: To document the anatomic and functional improvement of six patients with branch retinal vein occlusion (BRVO) following successful arteriovenous adventitial sheathotomy (AAS). Retrospective study of 6 patients (6 eyes) with BRVO treated with AAS. All patients were not eligible for laser photocoagulation and had both macular edema and intraretinal hemorrhage. The visual acuity was in the range of 0.4 to 0.02. All patients underwent pars plana vitrectomy and AAS. The clinical improvement was determined by fundus photograph, fluorescein angiography (FAG), optical coherence tomography (OCT) and multifocal electroretinography (ERG). All patients were followed postoperatively for an average of 20 months ranging from 12 to 24 months. Sheathotomy and decompression of the arteriole/venule (A/V) crossing were achieved in all 6 patients. 5 patients have improved their best-corrected visual acuity 4 lines or more. The best one could reach to 1.0. One month after the operation, fundus photograph and FAG demonstrated the resolution of intraretinal hemorrhage, reduction of non-perfusion area and apparent resolution of retinal venous dilation and tortuosity. OCT confirmed remarkable reduction of retinal thickness. The microcysts at the fovea diminished. Multifocal ERG showed the recovery of the central peak at the macular and the peripheral response density. However, capillary nonperfusion area and microaneurysm were found out by FAG in four patients at the points distal to the sheathotomy three months after the operation. Anatomic and functional improvement of retina can be achieved in patients with BRVO through AAS. However, the capillary nonperfusion and microaneurysm may follow this surgical procedure in some cases that need further treatment with laser photocoagulation. The better visual improvement may be expected in the patients with earlier surgical intervention.
    Yan ke xue bao = Eye science / "Yan ke xue bao" bian ji bu 04/2003; 19(1):33-8.

Publication Stats

12 Citations
2.93 Total Impact Points

Institutions

  • 2006
    • Sun Yat-Sen University
      • State Key Laboratory of Oncology
      Shengcheng, Guangdong, China