Zhang Jinglin, Li Yonghao, Zhao Xiujuan, Yu Xiling, Lu Lin
From the State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.
Asia Pac J Ophthalmol (Phila). 2015 Nov-Dec;4(6):367-70. doi: 10.1097/APO.0000000000000139.
To compare the clinical features after 20-gauge (20G) versus 23-gauge (23G) pars plana vitrectomy (PPV).
This was a prospective observational study.
Patients who underwent 20G or 23G PPV participated in the study. Sutures were used in all patients who had 20G and as necessary in patients who had 23G. All patients were examined with ultrasound biomicroscopy and tonometry for intraocular pressure (IOP) preoperatively and postoperatively at 1 day, 1 week, 1 month, and 6 months.
Forty-nine eyes underwent 20G PPV and 97 eyes underwent 23G PPV. Hypotony appeared more frequently in the 23G group (9 patients of 97, 9%) than in the 20G group (1 patient of 49, 2%) 1 day after surgery. Mean IOP was statistically significantly lower in the 23G group 1 day after surgery (P = 0.000). Postoperatively, choroidal detachment (CD) was found in both the 23G group (22/97, 23%) and the 20G group (1/49, 2%). In the 23G group, the mean IOP of eyes with CD was significantly lower than those without CD. There was no statistically significant difference in vitreous incarceration between the 2 groups (P = 0.317).
Choroidal detachment and hypotony were common complications in the early stages after 23G PPV. The incidence of postoperative vitreous incarceration was similar in both groups.
比较20号（20G）与23号（23G）玻璃体切割术（PPV）后的临床特征。
这是一项前瞻性观察研究。
接受20G或23G PPV的患者参与本研究。所有接受20G手术的患者均使用缝线，接受23G手术的患者根据需要使用缝线。所有患者在术前以及术后第1天、1周、1个月和6个月接受超声生物显微镜检查和眼压测量以检测眼压（IOP）。
49只眼接受了20G PPV，97只眼接受了23G PPV。术后第1天，低眼压在23G组（97只眼中9例，9%）比20G组（49只眼中1例，2%）更频繁出现。术后第1天23G组的平均眼压在统计学上显著更低（P = 0.000）。术后，23G组（22/97，23%）和20G组（1/49，2%）均发现脉络膜脱离（CD）。在23G组中，发生CD的眼的平均眼压显著低于未发生CD的眼。两组间玻璃体嵌顿在统计学上无显著差异（P = 0.317）。
脉络膜脱离和低眼压是23G PPV术后早期的常见并发症。两组术后玻璃体嵌顿的发生率相似。
