June 2017
Volume 58, Issue 8
Open Access
ARVO Annual Meeting Abstract  |   June 2017
OCT angiography in adult primary rhegmatogenous retinal detachment before and after vitreoretinal surgery
Author Affiliations & Notes
  • Maria Silvana Galantuomo
    Department of Surgery, University Eye Clinic, Cagliari, Italy
  • Roberta Farci
    Department of Surgery, University Eye Clinic, Cagliari, Italy
  • Pietro Emanuele Napoli
    Department of Surgery, University Eye Clinic, Cagliari, Italy
  • Maurizio Fossarello
    Department of Surgery, University Eye Clinic, Cagliari, Italy
  • Footnotes
    Commercial Relationships   Maria Silvana Galantuomo, None; Roberta Farci, None; Pietro Napoli, None; Maurizio Fossarello, None
  • Footnotes
    Support  None
Investigative Ophthalmology & Visual Science June 2017, Vol.58, 4155. doi:
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      Maria Silvana Galantuomo, Roberta Farci, Pietro Emanuele Napoli, Maurizio Fossarello; OCT angiography in adult primary rhegmatogenous retinal detachment before and after vitreoretinal surgery
      . Invest. Ophthalmol. Vis. Sci. 2017;58(8):4155.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose : To analyze the morphological characteristics of adult primary rhegmatogenous retinal detachment ( RRD) assessed by optical coherence tomography angiography (OCT-A) before and after 25 gauge pars plana vitrectomy(25 G PPV), with gas or silicone oil tamponade.

Methods : Retrospective review all RDD surgeries performed between june and october 2016 with anatomical success, defined as a complete retinal attachment,. All patients underwent a complete ophthalmological examination, including fundus photography, spectral-domain OCT ( Cirrus 5000 SD-OCT, Zeiss, Germany) and OCT-A (Optovue XR Avanti, Optovue, USA), before and at follow-up visits ranging from 1 month to 6 months after RRD surgery. OCT-A retinal capillary density flow analysis was performed at four main depth intervals: 1) the superficial capillary plexus, acquired with automatic segmentation , 2) the deep capillary plexus, 3) photoreceptors ,and 4)choriocapillaris , all acquired with manual segmentation. Statistical analysis was performed by means of Mann Whitney U test and Wilcoxon W test.

Results : Fifty-one eyes of 51 patients were analyzed. Operative procedures included pars-plana vitrectomy 25 G, exchange BSS/PFCL , endolaser, and intraocular tamponade with 50% sulfur hexafluoride gas in 36 eyes, and silicone oil in 15 eyes. Forty-five eyes were macula off and six eyes were macula on. Before surgery, in macula-off patients we observed a marked reduction of capillary flow in superficial, deep and choriocapillary layers. After surgery, in macula-off patients, SD OCT demonstrated the presence of foveolar lucencies in 17% of cases, while OCT-A revealed enlargement and irregular changes of the foveal avascular zone ( FAZ ), and a residual significant hypoperfusion at the level of outer retina and photoreceptors. In macula-on patients, no lucencies were detected, and a subtle hypoperfusion of all retinal layers, less severe than in macula-off cases, was apparent at OCT-A.

Conclusions : OCT-A is a noninvasive imaging modality that allows visualization of retinal capillary density flow changes occurring after surgery for retinal detachment, and it could represent a predictive tool of visual acuity and retinal sensitivity recovery after 25 G PPV with gas or silicone oil tamponade.

This is an abstract that was submitted for the 2017 ARVO Annual Meeting, held in Baltimore, MD, May 7-11, 2017.

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