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Path 16

Laboratory Data

How is a reference interval defined by limiting values within which a specified percentage (usually 95%) of apparently healthy intividuals' test results would fall
What is the parametric approach to determining reference intervals the central 95% bounds are specified by the mean +/- 2 standard deviations
what is the non-parametric approach to determining reference intervals central 95% bounds are determined by trimming off the lowest and highest 2.5% of observations
How can we reduce between person variation make the reference group more homogeneous or by making serial measurements on each individual and letting them serve as their own control
What percent of healthy individuals would be expected to have "abnormal" results on any given test after 1 test 5%
What is an accurate definition of fasting 12-14 hours is the optimal time
True or False? In a healthy person plasma volume decreases by >4% with the change from lying to standing false. In a healthy person it decreases by about 12%
Ideally all blood samples should be collected after a patient has been in the supine position for ? minutes 60
Where should you take the blood specimen from an arm with an IV You should not take blood samples from arms with IVs
What are some causes of hemolysis in blood samples 1) excessive suction 2) Rapid expulsion 3) Shaking
What can be seen when there is prolonged use of a tourniquet increased number of plasma constituents
How soon after collection must urine samples for microbiological studies be cultured within 1 hour
Created by: UVAPATH1



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