Due to the Renal rotation during development, the posterior calyces are are usually oriented with their long axis pointing towards the Brodel's line, hence puncture of posterior calyx will traverse this relatively avascular zone
, but in case of anterior-calyceal puncture, there is an increased risk of bleeding as more parenchyma is traversed to reach the calyx and also because of the reason that it wont traverse through the Brodel's line14.
Using an optical coherence tomographic angiography system, automated measurements of retinal nerve fiber layer thickness, ganglion cell layer thickness, inner and outer foveal thickness, vascular density, macular volume, and foveal avascular zone
were collected for both eyes.
Alterations of the foveal avascular zone
measured by optical coherence tomography angiography in glaucoma patients with central visual field defects.
AngioAnalytics brings objective data and analysis to Optovue's AngioVue OCTA technology which allows for high-resolution imaging of retinal blood vessels to create color-encoded maps of the vessel densities of the retina or optic nerve, and provide analyses of areas where there is blood vessel loss, abnormal blood vessel growth, or change to the foveal avascular zone
demonstrated that expanded autologous chondrocytes in combination with a porcine collagen membrane improved the healing of avascular zone
tears when compared to conventional suture repair in a goat knee injury model .
OCTA also provides information on the dimensions and shape of the foveal avascular zone
(FAZ), changes in which are most likely related to macular ischemia, especially in DR [14-17].
After one more month OCTA revealed enlargement of the foveal avascular zone
and broken foveal capillary ring in the superficial capillary plexus (SCP) and deep capillary plexus (DCP).
Fundus Florescence Angiography was done to identify margins of foveal avascular zone
, to rule out macular ischemia and determine the boundaries for macular grid laser application.
The anterior peritoneum of presacral promontory was opened longitudinally to expose the presacral region, and the avascular zone
of the S1 anterior vertebra was chosen as the suture site, then, the peritoneum was opened along the inner side of the right uterosacral ligament till the vaginal vault.
Natural course of choroidal neovascular membranes within the foveal avascular zone
in senile macular degeneration.
Normal visual acuity can remain despite a greatly enlarged foveal avascular zone
. (24) In addition to the presence of an enlarged foveal avascular zone
is the macular depression sign; this represents atrophy and thinning of the inner retinal layers which can be seen with optical coherence tomography (OCT) and may be associated with a reduction in vision (see Figure 3).
Foveal cystoid spaces are associated with enlarged foveal avascular zone
and microaneurysms in diabetic macular edema.