Comp Quiz Questions

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Comp Quiz Questions
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2013-08-16 21:52:47
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fourth quiz - difficulty moderate
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  1. The increase in the level of serum enzymes used to detect cholestatic liver disease
    is caused mainly by
    enzyme release from dead cells.
  2. Which of the following antigens has the highest frequency in caucasians?
    c
  3. An APTT is performed on a patient and the result is 50 seconds (reference range27-37). The instrument flags the result because of a delta check failure. Thepatient’s APTT the day before was 35 seconds. The technologist calls thenursing unit to check if the patient is on heparin therapy. The patient is not
    receiving heparin. What is the next appropriate step?
    Check to see if the patient has received any other anti-coagulant medications.
  4. Which of the following conditions is most commonly associated with an elevated level of total protein?
    chronic inflammation
  5. Short gram neg rod, causes cystic fibrosis, oxidase neg, lavender green pigment       Motility : +       DNase: +  glucose: + (oxidative) Maltose: +   lysine decarboxylase: +  esculin
    hydrolysis: +
    S. maltophilia
  6. n a nonmyocardial as opposed to a myocardial cause of an increased serum or plasma
    CK-MB, which would be expected?
    an increase in CK-MB that is persistent
  7. An initial and repeat ELISA test for antibodies to HIV-1 are both positive. A
    Western blot shows a single band at gp160.The patient shows no clinical signs
    of HIV infection and the patient's TH cell count is normal. Based upon these
    results, which conclusion is correct?
    The results are inconclusive
  8. Which of the statements below
    regarding the diagnosis of pancreatitis is correct?
    Diagnostic sensitivity is increased by assaying both lipase and amylase
  9. The results of chemistry tests
    are: 

    Na: 138mmol/L; K: 4.2mmol/L; Cl:
    94mmol/L; TCO2: 20mmol/L; glucose: 100mg/dL; T bili: 1.2mg/dL; BUN:
    6.8mg/dL; creat.: 1.0mg/dL; albumin: 4.9g/dL; T protein: 5.1g/dL

    What should be done next?
    Repeat total protein
  10. Fever, abdominal cramping, watery
    stool, and fluid and electrolyte loss preceded by bloody stools 2-3 days before
    is characteristic of shigellosis, but may also result from infections with:
    Campy
  11. In a cold autoadsorption
    procedure, pretreatment of patient red cells with which of the following
    reagent is helpful?
    ficin
  12. Characteristics
    of the HACEK group of bacteria include:
    requirement of 5%-10% CO2 for growth.
  13. When performing a factor IX activity assay, a patient's plasma is mixed with:
    Factor IX deficient plasma
  14. What is the purpose of the complement split products C3a and C5a?
    • to cause increased vascular permeability, contraction of smooth muscle, and the
    • release of histamine from basophils
  15. When performing platelet aggregation studies, which set of platelet aggregation
    results would most likely be associated with Glanzmann's thrombasthenia?
    • normal platelet aggregation with ristocetin; decreased aggregation with collagen, ADP,
    • and epinephrine
  16. Select the reagent needed in the coupling enzyme reaction used to generate a colored
    product in the cholesterol oxidase method for cholesterol.
    phenol (such as p-hydroxybenzenesulfonate)
  17. A
    3-year-old male was admitted to the hospital with scattered petechiae and
    epistaxis. The patient had normal growth and no other medical problems except
    for chicken pox three weeks earlier. His family history was unremarkable. His
    results are:
    PT: 11 sec. (10-13) platelet count: 18,000/uL (150-450 x 103/uL)
    APTT: 32 sec. (28-37) bleeding time: 21 min. (2-8 min.)
    The clinical manifestations and laboratory results are consistent with:
    ITP
  18. A
    58-year-old female chemotherapy patient received two units of PRBCs. The
    patient died three days later and the report from the autopsy revealed that her
    death was due to septic shock. The bags were cultured and the following results
    obtained:
         Aerobic gram negative rods on Blood and MacConkey
    agars
         Lactose:
    neg         Sucrose :
    +            
    Citrate: neg           
    Indole: neg
         VP:
    neg               
    Urease:
    +              
    Motility 37oC:
    neg            Motility
    22oC: +
    What is the most likely identification?
    Yersenia
  19. What is the correct procedure upon receipt of a test request for hCG on the serum
    from a 60-year-old man?
    Perform the test; hCG may be seen in germ cell tumors
  20. A patient deficient in the complement component C3 would be capable of which
    response?
    type ! and VI
  21. transplant patient began to show signs of rejection eight days after the receipt of a
    kidney, and the kidney was removed. What immune elements might be found in the
    rejected organ?
    Tcells and macrophages
  22. When performing a mixing study, the patient's APTT is corrected from 60 sec. to 45
    sec. (reference range 21-35 sec.).   What is the most appropriate interpretation of these results?
    The APTT is considered uncorrected
  23. A 60-year-old patient was admitted to the hospital at 7:00AM for a liver biopsy.
    The biopsy was scheduled for 11:00AM. The coagulation results performed with
    the admission work showed a PT of 65 seconds with an INR of 4.5. What is the
    most appropriate course of action?
    Cancel the procedure and start the patient on vitamin K therapy.
  24. A cord blood typing appears to be AB Rh positive with a 2+ DAT. The baby is
    normal and the mother's type is O Rh negative. Is there a problem?
    • A problem exists because an AB baby is not possible with an O mother; wash the
    • cells and retype. Perform a negative control for the DAT.
  25. What is the crossmatching protocol for platelets and plasma?
    No crossmatching is required
  26. In fluorometry, the excitation
    wavelength is ___________the emission wavelength








    Selected
    Answer:
    shorter than
  27. The most noted differences between P.aeruginosa and S.maltophilia are:
    • oxidase, 42oC growth,
    • and polar tuft of flagella.

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