Τίτλος:
Reduction of Foveal Avascular Zone After Vitrectomy Demonstrated by
Optical Coherence Tomography Angiography
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
Purpose: To investigate the effect of pars plana vitrectomy on foveal
circulation, and in particular the foveal avascular zone (FAZ), using
optical coherence tomography angiography (OCTA).
Methods: This was a prospective, non-randomized, comparative case series
of patients that underwent vitrectomy. Twenty-six eyes of 26 patients
that underwent vitrectomy were studied postoperatively by OCTA. Our
patients underwent 23 or 25G pars plana vitrectomy (PPV) for any
posterior segment pathology. Three-dimensional OCTAs (DRI Triton Swept
Source OCT; Topcon) of the capillary plexus were obtained three months
post-operatively. The FAZ measurements of the fellow eyes were used as
controls.
Main outcome measures: Change in FAZ area between vitrectomized eyes and
controls.
Results: From a total of 26 patients, 17 underwent vitrectomy due to
retinal detachment (RD). Almost all patients demonstrated a
statistically significant reduction in FAZ size based on the OCTA
measurements..he mean difference in FAZ size for the superficial
capillary plexus (SCP) was -93.77 +/- 71.73 mu m and for the deep
capillary plexus (DCP) -88.87 +/- 75.41 mu m, both statistically
significant (p=0.000), while the amount of reduction in mu m was the
same for both SCP and DCP.
Conclusion: The foveal avascular zone seems to be reduced following
vitrectomy as shown by optical coherence tomography angiography. It is
postulated that this may be the result of changes in the physiology of
the vitrectomized eye, and that this change should be attributed to the
removal of the vitreous itself rather than other structures such as the
internal limiting membrane.
Συγγραφείς:
Petrou, Sr., Petros
Angelidis, Constantine D.
Andreanos,
Konstantinos
Kanakis, Menelaos
Kandarakis, Stylianos and
Karamaounas, Aristotelis
Papakonstantinou, Evangelia
Mamas,
Nikolaos
Droutsas, Konstantinos
Georgalas, Ilias
Λέξεις-κλειδιά:
vitrectomy; faz; oct; angiography; retina
DOI:
10.7759/cureus.13757
