Valerie L Ng
Affiliation: Alameda County Medical Center
- Prothrombin time and partial thromboplastin time assay considerationsValerie L Ng
Department of Laboratory Medicine, School of Medicine, University of California San Francisco, San Francisco, CA, USA
Clin Lab Med 29:253-63. 2009..Thus, this article reviews laboratory issues and known variables influencing prothrombin time and partial thromboplastin time results and international normalized ratio determinations...
- Anticoagulation monitoringValerie L Ng
Department of Pathology and Laboratory Medicine, Clinical Laboratory Room 3408, Alameda County Medical Center Highland General Hospital, 1411 East 31st Street, Oakland, CA 94602, USA
Clin Lab Med 29:283-304. 2009..The newer anticoagulants (heparin analogs, direct factor Xa inhibitors, and direct thrombin inhibitors) and various applied coagulation laboratory testing and related issues are also discussed...
- Utilization management in the core laboratoryValerie L Ng
Department of Laboratory Medicine, School of Medicine, University of California San Francisco, San Francisco, CA, United States Laboratory Medicine and Pathology, Highland General Hospital, Alameda Health System, Oakland, CA, United States Clinical Laboratory, Highland General Hospital, Oakland, CA, United States Electronic address
Clin Chim Acta 427:154-7. 2014..g. unrestricted, daily, weekly, monthly, yearly or once in a lifetime). Classifying tests by this approach facilitates electronic rule-based logic to detect which tests are appropriate for a given clinical indication. ..
- Liver disease, coagulation testing, and hemostasisValerie L Ng
Clinical Laboratory, Highland General Hospital, 1411 East 31st Street, Oakland, CA 94602, USA
Clin Lab Med 29:265-82. 2009..Finally, this article reviews why FFP/FP cannot correct minimally prolonged clotting times in patients with liver disease, nor provide adequate prophylaxis against bleeding from percutaneous liver biopsy...
- Contemporary standards for the diagnosis and treatment of heparin-induced thrombocytopenia (HIT)Zachary K Baldwin
Division of Vascular Surgery, Department of Surgery, School of Medicine, University of California, San Francisco, Calif 94143, USA
Surgery 143:305-12. 2008..Currently available assays lack either adequate sensitivity and interlaboratory reproducibility (ie, functional serotonin release assays) or specificity (ie, enzyme-linked immunosorbent assays or ELISAs)...
- Clinically relevant differences in prothrombin time and INR values related to blood sample collection in plastic vs glass tubesEberhard W Fiebig
Department of Laboratory Medicine, University of California San Francisco, USA
Am J Clin Pathol 124:902-9. 2005..1 (INR, 1.5) to -0.7 (INR, 4.5). Of the plastic tube INRs, 50% were more than 10% lower than INRs from samples collected in glass tubes. Therapeutic monitoring based on plastic-tube INRs could result in higher doses of warfarin...