New Quiz

[Which of the following tubes can be used to collect a serum specimen?]

[SITUATION: An EDTA sample for TnI assay gives a result of 0.04 ng/mL (reference
range 0–0.03 ng/mL). The test is repeated 3 hours later on a new specimen and the
result is 0.06 ng/mL. A third sample collected 6 hours later gives a result of 0.07 ng/mL.
The EKG showed no evidence of ST segment elevation (STEMI). What is the most likely
explanation?]

[An outbreak of Staphylococcus aureus in the nursery department prompted the Infection Control Committee to proceed with an environmental screening procedure. The best screening media to use for this purpose would be:]

[Which statement regarding normal salt and H2O handling by the nephron is correct?]

[Anaerobic gram-positive diphtheroids (nonspore formers) were cultured from two separate blood culture bottles (at 5 days) obtained from a 25-year-old patient admitted to the hospital with dehydration, diarrhea, and other flulike symptoms. Four other blood culture bottles did not grow any organisms at 7 days and were discarded. The following results were obtained from the recovered anaerobe:
Indole = + Nitrate = + Catalase = +
Kanamycin = Sensitive Vancomycin = Sensitive
Colistin = Resistant Major acid from PYG broth
by GLC = Propionic acid
What is the correct identification?]

[Which isoenzyme of ALP is most heat stable?]

[The “e” is pronounced separately in:]

[The urease test, niger seed agar test, and the germ tube test are all used for the presumptive identification of:]

[Nonpathogenic Moraxella spp. capable of growing on selective media for Neisseria can be differentiated from Neisseria spp. by which test?]

[Specimens for virus culture should be transported in media containing:]

[Storage iron is usually best determined by:]

[Which of the following crystals is seen commonly in alkaline and neutral urine?]

[At which pH are ammonium biurate crystals usually found in urine?]

[A gram-negative coccobacillus was recovered on chocolate agar from the CSF of an
immunosuppressed patient. The organism was nonmotile and positive for indophenol
oxidase but failed to grow on MacConkey agar. The organism was highly susceptible to
penicillin. The most probable identification is:]

[What term describes the products produced when DNA is digested by restriction endonucleases?]

[Parasitic organisms that are most often transmitted sexually include:]

[Cetrimide agar is used as a selective isolation agar for which organism?]

[Four units of blood are ordered for a patient. Blood bank records are checked and indicate that 5 years ago this patient had an anti-Jkb. What is the next course of action?]

[Results of a fetal lung maturity (FLM) study from a patient with diabetes mellitus are as follows:
L/S ratio = 2.0; Phosphatidyl glycerol = Pos;
Creatinine = 2.5 mg/dL
Given these results, the technologist should:]

[Calculate the mean cell hemoglobin concentration (MCHC) using the following values:
Hgb: 15 g/dL (150 g/L) Hct: 47 mL/dL (0.47)
RBC: 4.50 × 10ˆ6/μL (4.50 × 10¹²/L)]

[What is the approximate incidence of antiphospholipid antibodies in the general
population?]

[Which of these tests are most affected if the patient is not fasting?]

[Which crystal appears in urine as a long, thin hexagonal plate, and is linked to ingestion of large amounts of benzoic acid?]

[An AFP measured on a 30-year-old pregnant woman at approximately 12 weeks gestation is 2.5 multiples of the median (MOM). What course of action is most appropriate? (fig 18)]

[Which of the following methods for HDL cholesterol is the reference method?]

[A patient had surgery for colorectal cancer, after which he received chemotherapy for 6 months. The test for carcinoembryonic antigen (CEA) was normal at this time. One year later, the bimonthly CEA was elevated (above 10 ng/mL). An examination and biopsy revealed the recurrence of a small tumor. What was the value of the results provided by the CEA test in this clinical situation?]

[What molecule on the surface of most T cells recognizes antigen?]

[Which of the following is a necessary element of risk management?]

[In most circumstances, when two controls within a run are both greater than ±2s from the mean, what action should be taken first?]

[Four units of packed RBCs were brought to the nurses’ station at 10:20 a.m. Two units were transfused immediately, and 1 unit was transfused at 10:40 a.m. The remaining unit was returned to the blood bank at 11:00 a.m. The units were not refrigerated after leaving the blood bank. What problem(s) is (are) present in this situation?]