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Journal of Healthcare Engineering
Volume 2018, Article ID 5909827, 13 pages
Research Article

The CLASS Surgical Site Characteristics in a Clinical Grading Scale and Anterior Segment Optical Coherence Tomography: A One-Year Follow-Up

Department of Ophthalmology, School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia, Katowice, Poland

Correspondence should be addressed to Judyta Jankowska-Szmul;

Received 30 December 2017; Revised 26 March 2018; Accepted 16 April 2018; Published 14 May 2018

Academic Editor: Wenfeng Xia

Copyright © 2018 Judyta Jankowska-Szmul and Edward Wylegala. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Purpose. We combined a clinical grading scale and swept source anterior segment OCT to describe the successful and failed CLASS. Material and Methods. 23 patients in the successful group and 17 patients in the failed group were compared in terms of the IBAGS grades and AS-OCT findings at one, three, and twelve months postoperatively. Results. The majority in the successful group presented shallow blebs (91%, 57%, and 52% at 1M, 3M, and 12M, resp.). 59% of the failed group presented no bleb (H0 E0) from the early postoperative period with the rate increasing to 88% at 3M and 100% at 12M. The scleral lake was detected in all the successful patients. The successful group showed significantly higher rates of TDM integrity (), IF (), and SCF (), but there were no significant differences in the rates of microcysts between the groups (). We found a significant decrease in the SL anteroposterior extent () and SL height () over time, with no significant correlation between the above parameters and IOP. Conclusions. The subconjunctival bleb may be a sign of the successful CLASS when it matches the AS-OCT findings of TDM integrity, maintained scleral lake, and intrascleral fluid. A validated OCT pixel intensity measurement is required to evaluate the bleb reflectivity.