CSMLS Chemistry + Hematology Exam Questions & Answers(RATED A+)

Which of the following ionization techniques is preferred for trace elements? a. matrix assisted laser desorption b. inductively coupled plasma c. electrospray d. chemical - ANSWER-b. inductively coupled plasma (mass spec) *trace element & heavy metal analysis Which of the following factors may cause an albumin result to fail a delta check flag when using the bromocresol green method? a. patient was recumbent during venipuncture b. specimen was collected in Li heparin c. specimen was icteric d. patient was not fasting - ANSWER-a. patient recumbent during venipuncture (same as having tourniquet on too long 1 min cause hemoconcentration) Which of the following requirements must be induced in the setup of a lab info system? a. specimen assigned a unique barcode label b. instrumentation interfaced with the lis c. lis interfaced to electronic medical record d. identification code and password to each user - ANSWER-d. identification code and password to each user (security & privacy always primary requirement) Which of the following components is responsible for autoverification? a. server b. output device c. analyzer d. middleware - ANSWER-d. middleware Which of the following factors is most likely to cause a falsely increased creatinine clearance result in a 24 hr urine specimen? a. including first morning voided urine in sample collection b. using mid-stream voided urine fo the sample collection c. failing to include the last voided urine at the end of the sample collection d. failing to include some of the urine during sample collection - ANSWER-a. What is the effect on sodium quality control results if the calibration standards are over-diluted? a. decreased imprecision b. positive shift c. negative shift d. increased imprecision - ANSWER-b (over diluting cal = read lower = less steep curve) What is the molal freezing point of a sample with an osmolality of 403 mOsm/Kg? a. -0.075C b. -0.75C c. 0.075C d. 0.75C - ANSWER-b. -0.75C 403 X (-1.86C/1Osm) X (1Osm/1000mOsm) = -0.75 Which of the following conditions correlates with a plasma phosphorus of 0.35 mmol/L? a. rhabdomyolysis