Biomedical subjects

Xi Zhang

Publications and source records attributed to Xi Zhang.

75 records · Page 5Linked to original sources

PubMed2002

[Surgical therapeutic results of rhegmatogenous retinal detachment associated with choroidal detachment].

OBJECTIVE: To evaluate the effect of different factors on the prognosis of rhegmatogenous retinal detachment (RRD) associated with choroidal detachment (ChD). METHODS: One hundred and eighty-eight eyes of 188 patients were studied retrospectively from Jan, 1996 to Aug, 1998. The clinical data, surgical management and follow-up records were analyzed. RESULTS: The total successful rate of the surgery was 83.0%, lower than that of general RRD. In the eyes with proliferative vitreoretinopathy (PVR) A-B, the rate was 89.6%, in the eyes with C(1)-C(3) PVR, the rate was 84.1%, in D(1)-D(3), 69.0%. In eyes with severe PVR the successful rate of vitrectomy was higher than that of scleral buckling alone. Administration of steroids before surgery resulted in high successful rate, but the length of time of the steroid treatment had no effect on the successful rate. In the eyes using scleral buckling alone, the drainage or without the drainage of subretinal fluid had no effect on the successful rate. CONCLUSIONS: RRD associated with ChD has worse prognosis than general RRD. The administration of steroids before surgery is necessary, and the timing of surgery is also important. In eyes with light PVR and ChD, scleral buckling without drainage of subretinal fluid is the first choice, but in eyes with severe PVR and ChD, vitrectomy is a better choice.

Adolescent↗

PubMed2002

[Epidemiology survey of rhegmatogenous retinal detachment in Beijing districts, Shanghai].

OBJECTIVE: To investigate the recent incidence and related risk factors of rhegmatogenous retinal detachment (RD) in Chinese people. METHODS: This incidence survey was based on 108 132 persons in Beijing districts, Shanghai, P. R. China. Rhegmatogenous RD patients came from inpatient, outpatient service data and the local health net databank composed of health data of 97.5% of all local residents. A contrast group was set up. The previous population data can be used to estimate the whole and specific incidence of rhegmatogenous RD. Some factors relevant to rhegmatogenous RD incidence were found by comparing the patient group and the contrast group. RESULTS: In Dec 1996 to Dec 1999, 61 cases with rhegmatogenous RD newly happened. The patients were 29 males and 32 females. The annual incidences of rhegmatogenous RD in these 4 years were 11.3/10(5), 14.1/10(5), 14.1/10(5) and 17.6/10(5) respectively, and the average annual incidence was 14.4/10(5) (95% confidence interval 10.0 - 18.6). There was a high incidence of rhegmatogenous RD in persons older than 40 years, especially between 40 and 59. When compared with the contrast group, the proportion of high myopia (more than -6.00 D) was significantly higher in rhegmatogenous RD patients group (P < 0.001). CONCLUSIONS: The annual incidence of rhegmatogenous RD of local Chinese population in these 4 years is increasing. It is strongly associated with high myopia and age, but not with gender.

Adolescent↗

PubMed2002

[An epidemiological survey of low vision and blindness of senile persons in Beixinjing blocks, Shanghai].

OBJECTIVE: To investigate the morbidities of low vision and blindness and the leading cause of blindness in residents aged >or= 60 years in Beixinjing blocks, Shanghai. METHODS: The vision archives were first established for total old residents. The pinhole visual acuity was recorded and classified under WHO grading system. Assigned ophthalmologic doctors assured the leading blind causes of every blind person. RESULTS: The response rates in 1994, 1997 and 2000 were 83.87%, 88.32% and 91.98% respectively. The morbidities of low vision and blindness in these 3 years were 3.61% and 1.51%, 2.31% and 1.09%, 1.31% and 0.71% respectively. The leading causes of blindness were degenerative retinopathy (including age-related maculopathy), cataract, corneal diseases and retinal angiopathy (including hypertensive and diabetic retinopathy, retinal artery or venous occlusion, etc). CONCLUSIONS: The morbidities of low vision and blindness in this area decreased from 1994. The leading cause of blindness was degenerative retinopathy.

Aged↗