How often must controls be run for the PT and PTT?
a. With each patient sample
b. At least once per 8-hour shift
c. At least once per 24 hours
d. With each batch of 10
ANS: B
Controls should be run at the beginning of each 8-hour shift and with each change of reagent for both of these tests.
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TAR stands for:
a. Treatment Authorization Requisition b. Treatment Authorization Referral c. Treatment Authorization Request d. Treatment Authorization Repetition
Which of the following statements best describes the pathogenesis of HIV infection?
a. HIV virus selectively infects T helper cells, incorporates its own DNA into the T helper's DNA, and lyses the cell. b. HIV virus infects all lymphocytes, incorporates its own DNA into the T helper's DNA, and changes the T helper's identity. c. HIV virus infects all cells involved in cell-mediated immunity, incorporates its own DNA into the DNA of the infected cells, and lyses the cells. d. HIV infects T-suppressor cells and initiates apoptosis.
Which of the following is normal in a CSF?
a. Ependymal cells b. 100 White cells per mm3 c. Blasts d. Mesothelial cells
Which of the following refers to an x-ray directed from the front of the body to the back?
a. Lateral b. Oblique c. Posteroanterior d. Anterioposterior