Preparation of Control Blood for External Quality Assessment of Point-of-Care International Normalized Ratio Testing in the Netherlands

Abstract

The control blood samples were useful for external quality assessment in the Netherlands. The participants' performance with the CoaguChek XS system improved with time, demonstrating the value of external quality assessment.

Therapeutic quality control in a regional thrombosis center: The effect of changing the target intensity of anticoagulation with vitamin K antagonists

“…The results obtained by the patient's self-test were compared to the results of the test performed by the staff. The performance of the center's device was evaluated regularly in an external quality assessment program [7,8].…”

“…External quality assessment (EQA) of the prothrombin time and INR is an important component of quality assurance of anticoagulant therapy. In the Netherlands, a national PT-INR EQA scheme has been carried out by the Federation of Netherlands Thrombosis Services [6][7][8]. TCNV has participated in the national PT-INR EQA scheme throughout and TNCV results satisfied EQA requirements (data on file).…”

Youden Two-Sample Method

“…This programme was conducted to compare the performance of individual laboratories in the area of pesticide formulation (Chlorpyrifos 20 EC) analysis. A total of 24 laboratories in India participated [45] Proficiency testing for the determination of pesticides in mango pulp: a view of the employed chromatographic techniques and the evaluation of laboratories' performance [46] Investigations for the improvement of the measurement of volatile organic compounds from floor coverings within the health-related evaluation of construction products: application of the Youden method [47] Characterization of candidate reference materials for bone lead via interlaboratory study and double isotope dilution mass spectrometry [48] Implementation and methodology of an interlaboratory system that ensures the quality of glassware calibration and use in a large laboratory [49] An updated liquid chromatographic assay for the determination of glyphosate in technical material and formulations: application of the Youden method [50] Collaborative studies for quantitative chemical analytical methods [51] Description and results of the 2005 interlaboratory comparison exercise for trace elements in marine mammals. Two quality control materials derived from fresh-frozen marine mammal livers were produced and characterized at the NIST and were then distributed to over 30 laboratories [52] Youden method applied to the external quality control of semen analysis in Germany [53] Quality assurance in analytical chemistry application in the environmental, food and materials analysis, biotechnology and medical engineering [1] Brief note on the Youden method [54] Interlaboratory comparison by means of method performance precision and bias studies and proficiency testing schemes are described.…”

Impact of point‐of‐care international normalized ratio monitoring on quality of treatment with vitamin K antagonists in non‐self‐monitoring patients: a cohort study: reply

“…The Star-Medical Diagnostic Center participated in two external quality assessment (EQA) programs organized by the Dutch Federation of Thrombosis Centers during the course of our study. The first EQA program was set up for laboratory prothrombin time and international normalized ratio (INR) determination and the second program was set up for INR point-of-care (POC) testing [2]. Each participant's result was compared with the mean value of all participants using the same method (e.g.…”