TY - JOUR
T1 - A custom-made semiautomatic analysis of retinal nonperfusion areas after dexamethasone for diabetic macular edema
AU - Toto, Lisa
AU - D’aloisio, Rossella
AU - Chiarelli, Antonio Maria
AU - Di Antonio, Luca
AU - Evangelista, Federica
AU - D’onofrio, Giada
AU - Merla, Arcangelo
AU - Parravano, Mariacristina
AU - Di Marzio, Guido
AU - Mastropasqua, Rodolfo
N1 - Funding Information:
Publication fees were funded by Allergan Plc., at the request of the investigator. All authors met the ICMJE authorship criteria. Neither honoraria nor payments were made for authorship.
Publisher Copyright:
© 2020, Association for Research in Vision and Ophthalmology Inc. All rights reserved.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/6
Y1 - 2020/6
N2 - Purpose: To evaluate the changes of retinal capillary nonperfusion areas and retinal capillary vessel density of the superficial capillary plexus (SCP) and deep capillary plexus in patients with diabetes with diabetic macular edema treated with an intravitreal dexamethasone implant (IDI). Methods: We enrolled 28 patients with diabetic retinopathy and diabetic macular edema candidates to IDI. All patients underwent widefield optical coherence tomog-raphy angiography with PLEX Elite 9000 device with 15 × 9 mm scans centered on the foveal center at baseline, 1 month, 2 months, and 4 months after IDI. In all the patients, the variation of the retinal capillary nonperfusion areas and of the retinal vessel density of the SCP and deep capillary plexus were calculated using an automatic software written in Matlab (MathWorks, Natick, MA). Results: During follow-up, SCP showed a statistically significant reduction of ischemic areas at 1 month after IDI (P = 0.04) and slightly increased not significantly thereafter (P = 0.15). The percentage of nonperfusion areas changed from 11.4% at baseline, to 6.3% at 1 month, 8.1%, at 2 months, and 10.2% at 4 months. The whole vessel density of SCP slightly increased (not significantly) from 35.30% at baseline to 38.00% at 1 month, and then decreased to 37.85% at 2 months and 36.04% at 4 months (P = 0.29). Retinal capillary nonperfusion areas and retinal vessel density at the deep capillary plexus did not change significantly (P = 0.31 and P = 0.73, respectively). Conclusions: Widefield optical coherence tomography angiography showed a decrease in retinal capillary nonperfusion areas after dexamethasone implant suggesting a possi-ble drug-related reperfusion of retinal capillaries particularly evident in the early period. Translational Relevance: A custom-made automatic analysis of retinal nonperfusion areas may allow a better and precise evaluation of ischemic changes after intravitreal therapy.
AB - Purpose: To evaluate the changes of retinal capillary nonperfusion areas and retinal capillary vessel density of the superficial capillary plexus (SCP) and deep capillary plexus in patients with diabetes with diabetic macular edema treated with an intravitreal dexamethasone implant (IDI). Methods: We enrolled 28 patients with diabetic retinopathy and diabetic macular edema candidates to IDI. All patients underwent widefield optical coherence tomog-raphy angiography with PLEX Elite 9000 device with 15 × 9 mm scans centered on the foveal center at baseline, 1 month, 2 months, and 4 months after IDI. In all the patients, the variation of the retinal capillary nonperfusion areas and of the retinal vessel density of the SCP and deep capillary plexus were calculated using an automatic software written in Matlab (MathWorks, Natick, MA). Results: During follow-up, SCP showed a statistically significant reduction of ischemic areas at 1 month after IDI (P = 0.04) and slightly increased not significantly thereafter (P = 0.15). The percentage of nonperfusion areas changed from 11.4% at baseline, to 6.3% at 1 month, 8.1%, at 2 months, and 10.2% at 4 months. The whole vessel density of SCP slightly increased (not significantly) from 35.30% at baseline to 38.00% at 1 month, and then decreased to 37.85% at 2 months and 36.04% at 4 months (P = 0.29). Retinal capillary nonperfusion areas and retinal vessel density at the deep capillary plexus did not change significantly (P = 0.31 and P = 0.73, respectively). Conclusions: Widefield optical coherence tomography angiography showed a decrease in retinal capillary nonperfusion areas after dexamethasone implant suggesting a possi-ble drug-related reperfusion of retinal capillaries particularly evident in the early period. Translational Relevance: A custom-made automatic analysis of retinal nonperfusion areas may allow a better and precise evaluation of ischemic changes after intravitreal therapy.
KW - Diabetic macular edema
KW - Intravitreal dexamethasone implant
KW - Retinal nonperfusion areas
KW - Widefield OCT angiography
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U2 - 10.1167/tvst.9.7.13
DO - 10.1167/tvst.9.7.13
M3 - Article
AN - SCOPUS:85089430161
VL - 9
SP - 1
EP - 12
JO - Translational Vision Science and Technology
JF - Translational Vision Science and Technology
SN - 2164-2591
IS - 7
M1 - 13
ER -