Quality Control Flashcards
(98 cards)
It Is a system of ensuring accuracy and precision in the laboratory by including quality control reagents in every series of measurements.
Quality Control
It is a process of ensuring that analytical results are correct by testing known samples that resemble patient samples.
Quality Control
It involves the process of monitoring the characteristics of the analytical processes” and detects analytical errors during testing, and ultimately prevent the reporting of inaccurate patient test
results.
Quality Control
It is one component of the quality assurance system, and is part of the performance monitoring
that occurs after a test has been established.
Quality Control
It is the ability of an analytical method to measure the smallest concentration of the analyte of interest
Sensitivity
It is the ability of an analytical method to measure only the analyte of interest
Specificity
It is the nearness or closeness of the assayed value to the true or target value
Accuracy
determines how much of the analyte can be identified in the sample
Recovery study
determines if specific compounds affect the laboratory result test like hemolysis, turbidity and icteric
interference study
is used to assess presence of error (inaccuracy) in actual patient sample
Patient sample comparison study
it is the ability of an analytical method to give repeated results on the same sample that agree with one another
Precision or Reproducibility
It is the degree by which a method is easily repeated
Practicability
It is the ability of an analytical method to maintain accuracy and precision over an extended period of time during which equipment, reagents and personnel may change
Practicability
it is the ability of the analytical method to detect the proportion of individuals with-the disease.
Diagnostic sensitivity.
It indicates the ability of the test to generate more true-positive results and few false-negative. .
Diagnostic sensitivity
Screening tests require high sensitivity so that no case is missed
Diagnostic sensitivity
Formula in Diagnostic sensitivity
Sensitivity (%) = 100 x the number of diseased individuals with a positive test /
Total number of diseased individuals tested
It is the ability of the analytical method to detect the proportion of Individuals without the
disease.
Diagnostic specificity
It reflects the ability of the method to detect true-negatives with very few false-positives.
Diagnostic specificity
Confirmatory test require high specificity to be certain of the diagnosis.
Diagnostic specificity
Formula for Diagnostic specificity
Sensitivity (%) = 100 x the number of individuals without a negative test /
Total number of individuals tested without the disease
It involves the analyses of contra samples together with the patient specimens.
lntralab Quality Control (Internal QC)
It detects changes In performance between the present operation and the “stable” operation.
lntralab Quality Control (Internal QC)
It is important for the-daily monitoring of accuracy and precision of analytical methods
lntralab Quality Control (Internal QC)