Review Exam 2 Flashcards
Beers law is
Cs At/As x Cu
Relationships between concentration and absorbance. Absorption of visible light by compound concentration
Types of electrochemistry
Amperometry, conductometry, resistivity, impedance, voltammetry, coulometry
During migration of charged dilutes/particles in an electrical field-
Proteins have a NEG charge
Batch analyzers are
Designed to perform a sign analysis on a large batch of specimen. (Loads of specimens/one tests)
Random access
Flexibility by selecting test to be performed on a given patient sample. Reagent needed for test are stored on the instrument
Throughput
Number of tests/hour or specimens/hour
Preanalytical
Sample or specimen processing
Post analytical
Data processing, qc and result reporting
Advantages of automated analysis
Reduced errors, reduced tat, reduced costs, improved precision and accuracy, fewer repetitive stress injuries
Bi-directional. Test are completed and uploaded to the lis
To be performed are downloaded to the analyzer through the lab info system (LIS).
Mean is
Arithmetic average
Add then divide
Mode is
Number used most frequently
Parameter
Population number
Confidence intervals
Normal or ref ranges. 95% confidence level
Random error
Unpredictable and related to imprecision or variability
Systematic error (bias)
Values consistently low or high. Poor calibration
Proportional error
Increases as the concentration of the Analytes increases
Diagnostic sensitivity
Ability of a test to detect a disease or condition in patients who have that disease. True positive (tp/tp+fn)
Diagnostic specificity
Ability of a test to detect the absence of disease in orient who do not have disease. False beg (tn/tn+fp)
Levey - Jennings control charts
Charts used to plot daily qc data (monthly)
Westgard multi rule procedures
Rules applied to qc data to determine whether the run can be accepted or rejected
3 stages of statistical qc program
Establish control ranges, observe daily qc data, take action when rules are violated
A delta check is
Procedure in which a tech compares 2 consecutive lab results on a patient auto validate. Comparing patients ref range results
Fire class A
Ordinary combustible materials (paper wood plastic cloth)
Fire class B
Flammable combustible (liquids gases grease)
Fire class C
Energized electrical equipment
Fire class D
Combustible metals (magnesium titanium sodium)
Chemical hazards colors
Also comes with numbers 0-4 (deadlious) Blue- Health hazard. Red- fire hazard Yellow- radioactivity White- special hazards (acid, radiation)
Patient demographics
Patients name, sex, dob, patient number, ref physican, admitting diagnosis
Calibrators are
A known concentration
