Objective To observe the incidence of hypotony and its risk factors in the early stage after 23-gauge sutureless microincisional vitrectomy. Methods A retrospective case series. Seventy patients (70 eyes) who had undergone 23-gauge sutureless microincisional vitrectomy were enrolled. There were 41 phakic eyes, 29 eyes with intraocular lens; 68 eyes with a single surgical procedure and 2 eyes with a second surgical procedure; 34 eyes with BSS tamponade and 36 with gas tamponade. Intraocular pressure (IOP) was measured by non-contact tonometry. Hypotony was defined as an IOP of 5 mm Hg (1 mm Hg=0.133 kPa ) or less. The incidence of hypotony and other complications at postoperative day 1, 3 and 7 were observed. The influence of age, sex, side of operation, type of tamponade, status of lens, surgical time on postoperative hypotony was analyzed. Results Hypotony was found in 8 eyes (11.4%) on postoperative day 1 and recovered spontaneously on postoperative day 3. There were no significant differences comparing age (t=1.12), sex ( chi;2=2.23) and side of operation ( chi;2=2.01) between patients with hypotony and those without it. The patients with hypotony suffered longer surgical time than that of those without hypotony ( chi;2=5.48,P＜0.05). The incidence of hypotony in eyes with gas tamponade was significantly lower than that in eyes with BSS tamponade ( chi;2=5.48,P＜0.05). The incidence of hypotony in eyes with phakic eyes was lower than that in eyes with intraocular lens ( chi;2=4.20,P＜0.05). Hypotony was encountered in the 2 re-operated eyes. Choriodal folds were encountered in 2 eyes, but there was no other complication in other eyes. Conclusions A transient hypotony occurs commonly in first 3 days after 23-gauge sutureless microincisional vitrectomy. Hypotony was significantly influenced by type of tamponade, reoperation and intraoperative lens status.
Citation： 刘巨平,程朝晖,胡博杰,李筱荣. Early postoperative hypotony and risk factors after 23G sutureless microincisional vitrectomy. Chinese Journal of Ocular Fundus Diseases, 2011, 27(6): 549-552. doi: Copy