Publications by authors named "Ivan Guan"

Purpose: To determine the utility of ultra-widefield (UWF) imaging in detecting pathologic peripheral retinal tears and holes.

Methods: This was a retrospective, observational study. One-hundred ninety-eight eyes of 198 patients diagnosed with acute posterior vitreous detachment were included.

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Objective: To describe the phenomenology of cervical dystonia (CD) in patients with migraine and the effect of its treatment on migraine frequency.

Background: Preliminary studies demonstrate that treatment of CD with botulinum toxin in those with migraine can improve both conditions. However, the phenomenology of CD in the setting of migraine has not been formally described.

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Background And Objective: Levodopa off/on testing is frequently performed to assess medication response in patients with Parkinson's disease (PD) as an aid in determining best medical management or potential surgical candidacy. The Parkinson's Kinetigraph (PKG) is a wearable device which generates tremor, bradykinesia (BKS) and dyskinesia (DKS) scores representing motor symptoms over a six-day period. In this study, we compared off/on testing with PKG motor scores.

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Purpose: To identify any prognostic associations between preoperative optical coherence tomography findings and postoperative visual outcomes in patients with macula-off rhegmatogenous retinal detachment.

Methods: A retrospective, single-center study of patients diagnosed with macula-off rhegmatogenous retinal detachment whom underwent surgical reattachment from 2012 to 2017. Optical coherence tomography images were analyzed by two retina surgeons.

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It is well established that racial differences exist in kidney transplant outcomes; however, there are no studies which focus on the role of race in transplant outcomes specifically in children diagnosed with FSGS. Associations between race and transplant outcomes in FSGS children were evaluated using the Organ Procurement and Transplantation Network database from 2000 to 2012. Recipients aged 2-21 years who received a kidney-only transplant were included.

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