Nishitsuka Koichi, Nishi Katsuhiro, Namba Hiroyuki, Kaneko Yutaka, Yamashita Hidetoshi
Department of Ophthalmology and Visual Sciences, Yamagata University Faculty of Medicine, Yamagata, Japan.
BMJ Open Ophthalmol. 2021 Feb 17;6(1):e000605. doi: 10.1136/bmjophth-2020-000605. eCollection 2021.
To evaluate the technique of peripheral vitreous shaving during vitrectomy, we measured the residual peripheral vitreous using intraoperative optical coherence tomography (iOCT).
This retrospective study included 44 eyes that underwent 25-gauge pars plana vitrectomy with iOCT by a single surgeon. In all cases, the surgery was performed via ocular indentation. Cases in group A were treated with vitreous shaving under slit lamp microscope illumination, whereas cases in group B were treated with vitreous shaving under a wide-angle viewing system. Residual peripheral posterior vitreous-cortex detachment (PVD) was quantified by iOCT.
iOCT image analysis enabled the visualisation of the angle formed between the retina and peripheral PVD around the vitreous base in all cases. After the completion of vitreous shaving, the mean length of the peripheral PVD was shorter in group A (961.7±214.7 µm) compared with group B (1925.3.7 ± 626.1 µm; p<0.01).
iOCT enabled the quantification of the residual peripheral vitreous after vitreous shaving. The quantification of the residual peripheral vitreous after different shaving procedures will be important for advocating appropriate vitreous shaving in future.
为评估玻璃体切割术中周边玻璃体切除技术，我们使用术中光学相干断层扫描（iOCT）测量周边残余玻璃体。
这项回顾性研究纳入了44只眼，这些眼睛均由同一位外科医生通过25G经平坦部玻璃体切除术联合iOCT进行治疗。所有病例均通过眼球压迫进行手术。A组病例在裂隙灯显微镜照明下进行玻璃体切除，而B组病例在广角观察系统下进行玻璃体切除。通过iOCT对周边后部玻璃体-皮质脱离（PVD）进行量化。
iOCT图像分析能够在所有病例中显示视网膜与玻璃体基底部周围周边PVD之间形成的角度。玻璃体切除完成后，A组周边PVD的平均长度（961.7±214.7μm）短于B组（1925.3.7±626.1μm；p<0.01）。
iOCT能够对玻璃体切除术后周边残余玻璃体进行量化。不同切除术后周边残余玻璃体的量化对于未来倡导适当的玻璃体切除具有重要意义。
