ArticleJournal of current ophthalmology
The Effects of Pars Plana Vitrectomy and Panretinal Laser Photocoagulation on Ocular Blood Flow in Proliferative Diabetic Retinopathy.
Article in Journal of current ophthalmology. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Authors and funding
4 authors.
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Abstract
Purpose: To evaluate the effects of pars plana vitrectomy (PPV) versus panretinal photocoagulation (PRP) on ocular blood flow in patients with proliferative diabetic retinopathy (PDR). Methods: The blood flow parameters of the ophthalmic artery (OA), central retinal artery (CRA), central retinal vein (CRV), and posterior ciliary artery (PCA) of patients with PDR were evaluated with color Doppler ultrasonography (CDU), before and 6 months after PPV and PRP in 24 eyes of 24 patients. PRP alone was applied in the laser group, whereas PPV and PRP were applied to patients in the vitrectomy group. Results: CRA's peak systolic velocity, end-diastolic velocity, and CRV's mean velocity were significantly lower after PRP ( Conclusions: PRP treatment was associated with reduced flow velocities in the CRA and CRV; however, no comparable decline was observed when PPV was combined with PRP. Our findings suggest that PPV may counteract the flow-reducing effects of PRP by enhancing ocular blood flow velocities and decreasing vascular resistance. Given the limited sample size, this investigation should be considered a preliminary pilot study without definitive clinical conclusions.
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