Titiyal Jeewan S, Nair Sridevi, Kaur Manpreet, Rawat Jyoti, Mazumdar Saima Ahsan
From the Cornea, Cataract & Refractive Surgery Services, Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India.
J Cataract Refract Surg. 2021 Aug 1;47(8):1039-1043. doi: 10.1097/j.jcrs.0000000000000578.
To describe the incidence and morphological characteristics of posterior polar cortical disc defect (PPCDD) sign observed during phacoemulsification in posterior polar cataract (PPC).
Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India.
Prospective case series.
Sixty-seven eyes of 56 patients with PPC undergoing phacoemulsification were evaluated. Outcome measures were the incidence and characteristics of the intraoperative PPCDD sign, as well as its relation to the intraoperative surgical dynamics and posterior capsule (PC) dehiscence.
Of the 67 eyes evaluated, the PPCDD sign was seen in 86.5% of eyes (58/67). Among these, 93.1% of eyes (54/58) showed a complete disc defect, whereas 6.9% of eyes (4/58) had a partial disc defect with incomplete margins. In the majority of cases (89.6%; 52/58), the PPCDD sign was seen after epinuclear plate and plaque aspiration. Among the 9 eyes that did not show the PPCDD sign, en bloc separation of the plaque and cortical matter from the PC was observed in 2 eyes, the plaque remained adherent to the PC till the end of cortical fiber aspiration in 3 eyes, and intraoperative PC rupture (PCR) was observed during the plaque separation in 4 eyes. The incidence of PCR in eyes without PPCDD sign was significantly higher (44.4% vs 0%; P < .001).
The visualization of intraoperative PPCDD sign during phacoemulsification in PPC is suggestive of an intact PC and associated with a significantly lower rate of intraoperative PCR as compared with eyes without the PPCDD sign.
描述后极性白内障（PPC）超声乳化术中观察到的后极皮质盘状缺损（PPCDD）体征的发生率及形态特征。
印度新德里全印度医学科学研究所拉金德拉·普拉萨德眼科科学中心。
前瞻性病例系列研究。
对56例接受超声乳化术的PPC患者的67只眼进行评估。观察指标为术中PPCDD体征的发生率及特征，以及其与术中手术操作动态和后囊膜（PC）裂开的关系。
在评估的67只眼中，86.5%（58/67）的眼观察到PPCDD体征。其中，93.1%（54/58）的眼表现为完全性盘状缺损，而6.9%（4/58）的眼为边缘不完全的部分性盘状缺损。在大多数病例（89.6%；52/58）中，PPCDD体征在核上板和斑块吸出后出现。在未出现PPCDD体征的9只眼中，2只眼观察到斑块和皮质物质与PC整体分离，3只眼的斑块直至皮质纤维吸出结束时仍附着于PC，4只眼在斑块分离过程中观察到术中PC破裂（PCR）。无PPCDD体征的眼中PCR发生率显著更高（44.4%对0%；P <.001）。
PPC超声乳化术中观察到术中PPCDD体征提示PC完整，与无PPCDD体征的眼相比，术中PCR发生率显著更低。
