Testing
As more research is conducted to improve testing methodologies for endothelial dysfunction, however, several non-invasive tests have been created by various medical-research companies.
However, there is a serious flaw in measurements of endothelial function which involve the percentage change in diameter as the selected statistic. There is a negative correlation between percent flow mediated dilation and baseline artery size, but this has only recently been recognised as a fundamental scaling problem, showing that peak diameter does not change as a constant proportion of baseline diameter. This dependence of percent FMD on baseline diameter can lead to biased estimates of endothelial function. For reseaerch on flow-medaited dilation an ANCOVA approach to adjusting FMD for variation in baseline diameter is more appropriate.
Read more about this topic: Endothelial Dysfunction
Famous quotes containing the word testing:
“Bourbon’s the only drink. You can take all that champagne stuff and pour it down the English Channel. Well, why wait 80 years before you can drink the stuff? Great vineyards, huge barrels aging forever, poor little old monks running around testing it, just so some woman in Tulsa, Oklahoma can say it tickles her nose.”
—John Michael Hayes (b.1919)
“No testing has overtaken you that is not common to everyone. God is faithful, and he will not let you be tested beyond your strength, but with the testing he will also provide the way out so that you may be able to endure it.”
—Bible: New Testament, 1 Corinthians 10:13.
“Now I see that going out into the testing ground of men it is the tongue and not the deed that wins the day.”
—Sophocles (497–406/5 B.C.)