Author: Hesham Hamli (Canada)
Co-authors: Aditya Bansal, Wei Wei Lee, Tina Felfeli, Natalia Figueiredo, Carolina L. M. Francisconi, Rajeev Muni
Purpose
To investigate enface optical coherence tomography (OCT) as a screening tool for the detection of outer retinal fold (ORF) and subretinal fluid (SRF) blebs after successful rhegmatogenous retinal detachment (RRD) repair in eyes undergoing pneumatic retinopexy versus pars plana vitrectomy.
Setting/Venue
Cross-sectional study within a prospective cohort study were conducted on St. Michael's Hospital which is a clinical teaching hospital affiliated with the University of Toronto based on Toronto, Ontario, Canada.
Methods
Patients with RRD were followed prospectively following treatment. All patients had a 6X6 macular cube optical coherence tomography (OCT) scan within 1 to 4 months of surgical intervention. Enface slabs used for detection of ORF were between the ellipsoid zone and interdigitation zone with a thickness of 22 microns. For the detection of SRF blebs enface slab were 73 microns thick and extended from the outer nuclear layer to the ellipsoid zone. We assessed the sensitivity, specificity, positive predictive value (PPV) as well as the negative predictive value (NPV) of enface OCT in comparison to cross sectional OCT, the current gold standard.
Results
We assessed 316 eyes for the presence of ORFs and SRF blebs on enface and cross sectional OCT. On Enface OCT 50% (158/316) had ORFs and 28.16% (89/316) had SRF blebs. On cross-sectional OCT, 25% (79/316) had ORFs and 28.48% (90/316) of eyes. For ORFs sensitivity was 100%, specificity 66.67%, PPV 50% and NPV 100%. For SRF blebs sensitivity was 100%, specificity 71.84%, PPV 48.55% and NPV 100%.
Conlusions
Enface OCT is a useful screening test for the detection of ORFs and SRF blebs after successful rhegmatogenous retinal detachment repair. The presence of ORFs and SRF blebs detected on enface OCT should be confirmed with review of the cross-sectional OCT volume scan.
Financial Disclosure
Non/Applicable No financial relations to be disclosed
Comments
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