Clinical Chemistry-MLS Practice Questions & Answers| 100% Success| A+ Score

Clinical Chemistry-MLS Practice Questions & Answers| 100% Success| A+ Score 3 mg/dL is equivalent to ___ grams per liter A-0.3 B-3 C-0.03 D-0.003 - ANSWER-C-0.03 Which of the following statements describes optimal conditions for transport, handling, and storage of blood specimens for clinical chemistry testing A-Specimen is left in the tube system for an entire shift before being sent to the lab B-Specimen brought to lab immediately, permitted to clot, serum separated and tested as soon as possible C-Specimen brought to lab immediately, spun down and serum left to stand on clot until tested D-Specimen brought to lab within 6 hrs after collection, stored at room temp before centrifugation for up to 24 hrs - ANSWER-B-Specimen brought to lab immediately, permitted to clot, serum separated and tested as soon as possible Diurnal variation is a term that refers to A-Time of day of specimen collection B-Whether or not a patient is fasting C-Whether or not a patient is standing D-Collection of urine specimens - ANSWER-A-Time of day of specimen collection Violation of the 2-2S, 4-1S, or 10X Westgard rules is a strong indication of A-Analytical error B-Systemic error C-Random error D-Tech error - ANSWER-B-Systemic error A patient's BUN was 50mg/dL on day 1, and the control serum for BUN was within 2 SD of the mean on that day. On day 2, the same patient's BUN was 70mg/dL; again the control value was acceptable. Should the physician interpret this increase in the BUN as a real pathologic change in the patient? (The only control level available for this test has a mean value of 20mg/dL and a SD of 2mg/dL) A-True B-False - ANSWER-B-False Which one of the following is the correct formula for calculating the percent coefficient of variation of a set of measurements? A-CV=Standard deviation x 100% B-CV=(mean + standard deviation) 100% C-CV=(standard deviation mean) X 100% D-CV= standard deviation 100% - ANSWER-C-CV=(standard deviation mean) X 100% continues....