Background The dosage of verteporfin photodynamic therapy (PDT) for central exudative chorioretinopathy(CEC) depends on the calculation formula of Treatment of Age-related Macular Degeneration with Photodynamic Therapy Study Group(TAP)and Verteporfin in Photodynamic Therapy Study Group(VIP).Some local adverse responses or normal tissue damage have been noted under the standard dose of verteporfin during the treatment of CEC.So it is necessary to explore an appropriate therapeutic dosage of verteporfin.Objective This clinical study aimed to observe and compare the clinical efficacy and safety of different doses of verteporfin PDT for CEC.Methods Ninety eyes of 90 patients with CEC were enrolled in this study with the approval of the Ethic Commission of Affiliated Second Hospital of Nanchang University.Written informed consent was obtained before PDT.The patients were randomly divided into standard dose group,half dose group and 1/3 dose group.All of the patients received PDT.Standard dose(6 mg/m2),3 mg/m2 or 2 mg/m2 of verteporfin was applied in the three groups respectively,with the laser intensity 50 J/cm2.The patients were followed-up for 3 months.Repeat treating regimen was performed in the same way in the patient with fundus fluorescein leakage after initial PDT.Results The BCVA(logMAR) value was 0.44±0.36 after PDT in the standard dose group.Visual acuity improved in 20 patients (66.67％),stabilized in 8 patients(26.67％)and decreased in 2 patients (6.67％).The BCVA showed a significant difference between the preoperative and postoperative BCVA (t =6.719,P =0.000).CNV disappeared in 19 patients (63.33％),obviously improved in 7 patients (23.33％),partially disappeared in 3 patients (10.00％) and unchanged in 1 patient (3.33％).The central fovea thickness (CFT)value was significantly declined in postoperation compared with preoperation (t =5.758,P =0.000).Eight patients received secondary PDT with the recurrence rate 26.67％.In the half dose group,visual acuity improved in 18 patients(60.00％),stabilized in 11 patients(36.67％)and decreased in 1 patient (3.33％).CNV disappeared in 16 patients (53.33％),obviously improved in 8 patients (26.67％),partially disappeared in 5 patients (16.67％) and unchanged in 1 patient (3.33 ％).Significant difference was seen between the preoperative BCVA and postoperative BCVA(t=8.294,P =0.000).The decrease of C FT was significant in postoperation(t =8.493,P =0.000).Ten patients received secondary treatment with the recurrence rate 33.33％.In 1/3 dose group,visual acuity improved in 8 patients (26.67 ％),stabilized in 12 patients (40.00％),decreased in 10 patient (33.3％).CNV disappeared in 8 patients (26.67％),obviously improved in 8 patients (26.67％),partially disappeared in 6 patients (20.00％) and unchanged in 8 patient (26.67％).There was no significant difference between the preoperative BCVA and postoperative BCVA (t =0.536,P =0.596).The difference between preoperative CFT and postoperative CFT was insignificant(t =0.942,P=0.354).Fourteen patients received secondary PDT and 8 patients received three times with the recurrence rate 73.33％.Conclusions 3 mg/m2 verteporfin PDT for CEC shows a similar clinical efficiency and safety to 6 mg/m2 verteporfin.3 mg/m2 verteporfin PDT can decrease cost,but the effect of 2 mg/m2verteporfin PDT is not satisfacted.%背景 国内外光动力疗法(PDT)治疗中心性渗出性脉络膜视网膜病变(CEC)所使用的维替泊芬剂量是由TAP及VIP小组提出的依据患者体表面积计算得出的,部分临床研究表明该剂量治疗CEC可引起一些局部不良反应或损伤正常组织,因此探索维替泊芬的有效、安全剂量非常重要. 目的 观察并比较标准剂量、半剂量及1/3剂量维替泊芬PDT治疗CEC的临床疗效及安全性. 方法 收集2006年1月至2009年12月经荧光素眼底血管造影(FFA)、吲哚青绿血管造影(ICGA)、OCT检查诊断为CEC的患者90例90眼,采用随机数字表法随机分为标准剂量组、半剂量组和1/3剂量组,每组各30例30眼,分别接受6、3、2 mg/m2维替泊芬PDT治疗.治疗后3个月进行复查,如发现脉络膜新生血管(CNV)扩大或复发,给予重复治疗.结果 标准剂量组术后最佳矫正视力(BCVA) (logMAR)为0.44±0.36,视力提高者20例,占66.67％;稳定者8例,占26.67％;下降者2例,占6.67％.治疗后BCVA较治疗前明显提高,差异有统计学意义(t=6.719,P=0.000).治疗后CNV消失者19例,占63.33％,大部分消失者7例,占23.33％;部分消失者3例,占10.00％;未消失或扩大者1例,占3.33％.治疗后黄斑中心凹视网膜厚度(CFT)值为(296.27±81.84) μm,治疗后CFT较治疗前明显变薄,差异有统计学意义(t=5.758,P=0.000).标准剂量组中8例接受了二次PDT治疗,复发率为26.67％.半剂量组术后BCVA为0.36±0.30,术后视力提高者18例,占60.00％;稳定者11者,占36.67％;下降者1例,占3.33％.治疗后BCVA较治疗前明显提高,差异有统计学意义(t=8.294,P=0.000),术后CNV消失或完全消退者16例,占53.33％;大部分消失者8例,占26.67％;部分消失者5例,16.67％;未消失或扩大者1例,占3.33％.治疗后CFT值为(266.17±70.83) μm,治疗后CFT较治疗前明显变薄,差异有统计学意义(t=8.493,P=0.000).半剂量组中10例接受重复治疗,复发率为33.33％.1/3剂量组术后BCVA为0.57±0.30,术后视力提高者8例,占26.67％;稳定者12例,占40.00％;下降者10例,占33.33％.治疗后BCVA与治疗前比较差异无统计学意义(t=0.536,P=0.596).CNV消失或完全消退者8例,占26.67％;大部分消失者8例,占26.67％;部分消失者6例,占20.00％;未消失或扩大者8例,占26.67％.治疗后CFT值为(327.00±78.27) μm,治疗后CFT与治疗前比较差异无统计学意义(t=0.942,P=0.354).1/3剂量组中14例接受2次治疗,8例接受3次治疗,复发率为73.33％. 结论 半剂量与标准剂量维替泊芬PDT治疗CEC的疗效和安全性接近,采用半剂量治疗可以节省患者的治疗费用,但1/3剂量维替泊芬PDT治疗CEC的疗效不明显.
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