SUMMATIVE EXAM 5

23問 • 1年前

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BIAS: is usually described as a percent reflecting the difference between the measured value and the true value DIFFERENCES A. 5 AND 10 B. 5 & 5 C. 10 & 5 D. 10 & 5

B. 95, 100, 105

Method A and Method B for cholesterol both give a value of 200 mg/dL for a serum sample; however, the same QC material analyzed by Method A gives 185 mg/dL and by Method B gives 212 mg/dL. What might cause this? A. Method B is biased B. Method A is imprecise C. Both methods are showing a matrix effect for the QC material D. Any of the above answers may be correct

When the addition of extra substances, freezing or lyophilization alters the solution properties in a way that biases the measured result, the bias is said to result from a “MATRIX EFFECT.” MATRIX EFFECTS: Interference effect of a sample matrix causing a false decrease or increase in a test result; common matrix interferents are hemolysis, icterus and lipemia.

What does method TRACEABILITY mean? A. The calibration of a method is linear B. The method meets the required error budget C. The method’s accuracy is linked to a certified method and/or material D. The method does not show matrix effects

C. The method’s accuracy is linked to a certified method and/or material

Which of the following analytes has the biggest allowable error budget based on CLIA accuracy ranges? A. Albumin ± 10% B. Triglycerides ± 25% C. Chloride ± 5% D. Cholesterol ± 10

B. Triglycerides ± 25%

Which of the following is an example of a preanalytical error? A. Test method incorrectly calibrated B. Collection of blood in wrong kind of tube C. Presence of interfering substance in specimen D. Delay in sending the report to the provider

B. Collection of blood in wrong kind of tube

Which type of analytical error can be prevented by a good quality control program? A. Instrument not properly calibrated B. Presence of interfering substances in sample C. Presence of bubbles in the light path of a photometric method D. Analyte concentration so high it depletes the active reagent

A. Instrument not properly calibrated

Which type of analytical error is recognized by an HIL index? A. Instrument not properly calibrated B. Presence of interfering substances in sample C. Presence of bubbles in the light path of a photometric method D. Analyte concentration so high it depletes the active reagent

B. Presence of interfering substances in sample

What option(s) might be employed if a test result is above the upper limit of the test measurement range? A. Manual dilution followed by reanalysis of the diluted sample B. Automatic dilution and reanalysis of the sample C. Use of a reaction rate algorithm using two read windows for an enzyme assay D. Reporting the result as higher than the upper limit of the test method E. All of these

E. All of these

Which of the following tests is a good marker of nutritional status? A. Immunoglobulin M B. Prealbumin C. Ceruloplasmin D. Lp(a)

B. Prealbumin

Which test might be used to assess a person who is disoriented or confused? A. Cholesterol B. Ammonia C. CRPs D. Iron

B. Ammonia

Which tests might be ordered on a patient with abdominal pain to test for possible pancreatitis? A. Amylase and lipase B. Sodium and potassium C. Cholesterol and triglyceride D. C3 and C4

A. Amylase and lipase

Which of these drug levels would be considered toxic? A. Alcohol at 80 mg/dL B. Valproic acid at 50 μg/mL C. Digoxin at 2 ng/mL D. Acetaminophen at 250 μg/mL E. Salicylate at 27 mg/dL

D. Acetaminophen at 250 μg/mL

Which test is used as an indicator of congestive heart failure? A. CRP B. BNP C. Cholesterol D. Troponin E. Haptoglobin

B. BNP

Which of the following tests is the best monitor of diabetic glucose control over an 8–12-week period? A. Glucose B. Urine microalbumin C. Hemoglobin A1c D. Haptoglobin

C. Hemoglobin A1c

The lipoprotein particle that is used to determine increased risk of coronary artery disease and to determine and monitor treatment for high cholesterol is: A. HDL B. LDL C. Apolipoprotein A1 D. Chylomicron

B. LDL

Which test is the most specific for myocardial infarction? A. LDH B. CK C. Troponin D. Myoglobin

C. Troponin

If a screening TSH is high, which test is likely to be ordered next? A. Cholesterol B. Free T4 C. Ferritin D. Glucose

n which condition would TIBC be high? A. Hemochromatosis B. Chronic illness C. Malnutrition D. Iron deficienc

D. Iron deficiency

When the kidneys are not functioning properly to filter blood and rid the body of wastes, which of these test results would be most likely? A. GFR = 100 mL/min B. High blood creatinine C. High blood albumin D. Low blood BUN

B. High blood creatinine

Which of the following units would NOT be used for reporting glucose on a clinical chemistry laboratory report? A. mg/dL B. ounces/L C. mmol/L D. All are acceptable units

B. ounces/

What would be the value of 150 mg/dL glucose reported in SI units? A. 1.61 mmol/L B. 8.25 mmol/L C. 0.367 mmol/L D. None of the above values

B. 8.25 mmol/L

If total cholesterol is 4.0 mmol/L, what is the value in conventional units? A. 154 mg/dL B. 102 mg/dL C. 40 mg/dL D. None of the above values

A. 154 mg/dL

If the enzymatic activity of LD is 40 IU/L at 25°C, what is the activity at 37°C? A. 40 IU/L B. 59 IU/L C. 27 IU/L D. Impossible to tell from information provided

D. Impossible to tell from information provided

other names parasitology

Yves Laure Pimentel · 70問 · 2年前

other names parasitology