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OCT angiography-based monitoring of neovascular regression on fibrovascular membrane after preoperative intravitreal conbercept injection.
- Source :
- Graefe's Archive of Clinical & Experimental Ophthalmology; Aug2019, Vol. 257 Issue 8, p1611-1619, 9p
- Publication Year :
- 2019
-
Abstract
- Purpose: To quantify the preoperative neovascular change pattern on the fibrovascular membrane (FVM) within 7 days after intravitreal injection of conbercept (IVC) using optical coherence tomography angiography (OCTA) in proliferative diabetic retinopathy (PDR). Methods: Prospective, observational study of PDR patients with visible FVM receiving or not receiving IVC. Neovascular changes were assessed by OCTA pre-IVC and 1, 3, 5, and 7 days post-IVC. Vessel skeleton density (SD) and vessel density (VD) were quantified by an intensity-based optical microangiography algorithm. The interclass correlation coefficient (ICC) was calculated to assess the agreement between measurements. The SD and VD were compared between follow-ups using repeated-measures analysis in the IVC group. Results: The ICC was 0.992 (95% confidence interval [CI]: 0.982–0.996) for SD and 0.926 (95% CI: 0.838–0.912) for VD of neovascularization. The neovascularization on FVM significantly regressed in the IVC group (n = 16) compared with no IVC (n = 8) (p = 0.001 for SD and p < 0.001 for VD). The comparisons between consecutive follow-ups showed a statistically significant reduction in SD and VD at 1 and 3 days post-IVC. However, from day 3 onward, the SD and VD remained unchanged. There was no development or progression of tractional retinal detachment within the 7-day period after IVC. Conclusion: OCTA–based quantification of the neovascularization on FVM in PDR is feasible, with high inter-reader agreement. The regression of neovascularization reaches a plateau 3 days after IVC. Clinical Trial Registration: This trial is registered with the Chinese Clinical Trial Registry (http://www.chictr.org.cn, registration number ChiCTR-IPR-17014160). [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0721832X
- Volume :
- 257
- Issue :
- 8
- Database :
- Complementary Index
- Journal :
- Graefe's Archive of Clinical & Experimental Ophthalmology
- Publication Type :
- Academic Journal
- Accession number :
- 137507195
- Full Text :
- https://doi.org/10.1007/s00417-019-04315-0