First Author: E.Ünsal TURKEY
Co Author(s): K. Eltutar O. Kızılay B. Karini H. Güngel 0 0 0 0 0 0 0 0 0
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To evaluate the morphologic changes of the anterior segment by using Ultrasonic Biomicroscopy Imaging (UBM) in the patients who had pars plana vitrectomy (PPV) with or without internal tamponade agent injection.
Istanbul Education And Research Hospital Department Of Ophtalmology, Istanbul
This was a prospective study including the patients with planned PPV on October 2012-October 2013. The cases were included in 3 groups according to internal tamponade: the cases in which silicone oil was used as an internal tamponade agent (group 1) ; the cases in which gas ( SF6 or C3F8) was used (group 2) or the cases in which internal tamponade agents were not used (group3). UBM measurements were done before and 10 days after the surgery in the supine position. Anterior chamber depth (ACD) and lens thickness (LT) were measured according to the anterior segment axial images. Trabecular meshwork-iris angle (TIA), ciliary body thickness (CBT), scleral thickness (ST), trabecular meshwork-ciliary process distance (T-CPD), iris-ciliary distance process (I-CPD), iris thickness (IT) were measured from the radial section of the images taken from the temporal quandrant angle.
Our sample of study was made of the eyes from 72 patients. There was no statistically significant difference between the mean ages and the distributions of the cataract surgery of the groups of the groups, respectively (p=0,072, p>0,05), (p=0,918 ,p>0,05). The increase in the mean value of the TİA after the surgery was found statistically significant in the patients of group 1 (p=0,040), but not statistically significant for the patients of group 2 (p=0,845) and group 3 (p=0,965). The value of the CBT of the patients of group 1 was statistically significantly constant (p=0,145) but in the patients of group 2 (p= 0,008) and group 3 (p=0,026) it was found statistically significantly reduced. The mean value of ST of the patients of group 1 was statistically significantly increased (p=0,011); whereas there was no statistically significant difference in the mean value of ST of the patients of group 2 (p=0,68) and Group 3 (p=0,296). There was no statistically significant difference in the mean value of the T-CPD of the patients of group 1 (p=0,681),however this value was statistically significantly reduced in the patients of group 2 (p=0,042) and group 3 (p=0,018).
Gases have been shown to be more effective than the other internal tamponade agents. They cause more morphological changes in the anterior segment structures, especially in the supine position. It is thought that complications like increased intraocular pressure are seen more frequently due to this reason.