In JoVE (1)
Other Publications (1)
Articles by Roy Semaan in JoVE
Use of Electromagnetic Navigational Transthoracic Needle Aspiration (E-TTNA) for Sampling of Lung Nodules Sixto Arias1, Hans Lee1, Roy Semaan1, Bernice Frimpong1, Ricardo Ortiz1, David Feller-Kopman1, Karen Oakjones-Burgess1, Lonny Yarmus1 1Section of Interventional Pulmonology, Division of Pulmonary and Critical Care Medicine, Johns Hopkins University We describe the novel use of electromagnetic navigational guided transthoracic needle aspiration for the pathologic assessment of human lung nodules.
Other articles by Roy Semaan on PubMed
Impact of Anemia on Platelet Response to Clopidogrel in Patients Undergoing Percutaneous Coronary Stenting The American Journal of Cardiology. Jan, 2012 | Pubmed ID: 22277895 High residual platelet reactivity (HRPR) on clopidogrel is a predictor of recurrent ischemic events in patients undergoing percutaneous coronary interventions (PCI). Significant intraindividual variability in platelet aggregation on repeat testing has been reported. To understand factors contributing to the variability in platelet aggregation testing, we examined clinical and laboratory elements linked to HRPR in 255 consecutive patients tested â‰¥12 hours after PCI using light transmission aggregometry (LTA) in response to adenosine diphosphate 5 Î¼mol/L and VerifyNow P2Y12 assay (VNP2Y12; Accumetrics). HRPR was defined as >46% residual aggregation for LTA and >236 P2Y12 response units (PRUs) for VNP2Y12. On multivariate analysis the only variable independently associated with HRPR with both LTA and VNP2Y12 was laboratory-defined anemia. Prevalences of HRPR by LTA were 34.3% in anemic patients, 15.6% in patients with normal hemoglobin levels, and 59.8% versus 25.9% by VNP2Y12 (p