scholarly journals Genetic and Environmental Contributions to Weight, Height, and BMI From Birth to 19 Years of Age: An International Study of Over 12,000 Twin Pairs

2013 ◽  
pp. 59-88
Keyword(s):  
International Study

HIV/AIDS and deaf perspectives: An international study from 38 nations

2008 ◽  
Author(s):  
Kathleen P. Donnelly-Wijting ◽  
Carolyn Corbett ◽  
Asiah Mason
Keyword(s):  
International Study ◽  
Hiv Aids

International study of statistical anxiety

2008 ◽  
Author(s):  
Kai Ruggeri ◽  
Carmen Diaz ◽  
Karl Kelley ◽  
Ilona Papousek
Keyword(s):  
International Study

International Study on General Practitioners and Early Psychosis Questionnaire

2009 ◽  
Author(s):  
Andor E. Simon ◽  
Helen Lester ◽  
Lynda Tait ◽  
Emanuel Stip ◽  
Paul Roy ◽  
...  
Keyword(s):  
General Practitioners ◽  
International Study ◽  
Early Psychosis

Calibration of a Lyophilized Pooled Plasma as Candidate Reference Plasma for Standardization of the Prothrombin Time Ratio

1993 ◽  
Vol 13 (02) ◽  
pp. 96-105 ◽  
Author(s):  
H. Beeser ◽  
U. Becker ◽  
H. J. Kolde ◽  
E. Spanuth ◽  
P. Witt ◽  
...  
Keyword(s):  
Prothrombin Time ◽  
International Study ◽  
International Normalized Ratio ◽  
Measurement Methods ◽  
Factor V ◽  
Diagnostic Instruments ◽  
Plasma Pool ◽  
Normal Plasma ◽  
German Association ◽  
Prothrombin Time Ratio

SummaryThe prothrombin time (PT), obtained from a fresh normal plasma pool (FPP), is the basis both for the establishment of the 100% activity (normal plasma) and for the ratio calculation used in the International Normalized Ratio (INR) according to the recommendations of the ICSH/ICTH (6). Today the PT of lyophilized normal plasma pools are successfully used as reference for the assessment of samples in proficiency studies. However, a lack of comparability is to be recognized. Therefore the Committee of Hematology of the German Association of Diagnostics’ and Diagnostic Instruments’ Manufacturers (VDGH) decided to produce a candidate reference plasma (VDGH Reference Plasma) which was calibrated against fresh normal plasma pools in an international study.The basic calibration was performed by using the same certified BCR thromboplastin (BCT/099) by all participants. The endpoint was determined manually and by using the coagulometer Schnitger-Gross. In additional testings each participant used his own routine thromboplastins and methods. Calculating the ratio [PT VDGH Reference Plasma (sec)/PT fresh normal plasma pool (sec)] the VDGH Reference Plasma showed a deviation from the average fresh normal plasma pool of 1.05 both with the BCT/099 and with all thromboplastins. There were obtained some statistical differences between “plain” and “combined’’ (added factor V and fibrinogen) thromboplastins. No statistical difference was found between the different endpoint measurement methods (manual, mechanical, optical).In spite of these statistical deviations the VDGH Reference Plasma can be used for the standardization of the PT-normal (100%) value with different ratios for plain (1.06) and combined (1.02) thromboplastins. The manufacturers will use this VDGH Reference Plasma for the calibration of their commercially available calibration plasmas, which allows the user of such a material to calculate a calibrated 100% PT value.

An International Study Centre - and an English Saint

Moreana ◽  
1985 ◽  
Vol 22 (Number 87-8 (3-4) ◽  
pp. 93-94
Author(s):  
Mary O’Neill
Keyword(s):  
International Study ◽  
Study Centre
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