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Med_Term Mod14
Lab Tests & Clinical Procedures
| Question | Answer |
|---|---|
| CD4+ | measures number of CD4+ T cells in blood stream of patients with AIDS |
| a normal CD4+ count is between | 500 & 1500 CD4+ cells/mm3 |
| starting treatment with anti-HIV drugs is recomended is a CD4+ count falls below | 250 to 200 CD4+ cells/mm3 |
| ELISA | screening test to detect anti-HIV antibodies in bloodstream |
| within 2 weeks of infection with HIV | anitbodies begin to appear |
| if the result of ELISA is positive, it is confirmed with | a Western blot test, which is more specific |
| Western blot test | specific test to detect presence of anti-HIV anitbodies in bloodstream |
| immunoelectrophoresis | test that separates immunoglobulins IgG, IgM, IgE, IgA, IgD |
| procedure detects presence of abnormal levels of antibodies in patients with conditions such as multiple myeloma, & Waldenstrom macroglobilunemia | immunoelectrophoresis |
| viral load tests | tests that measure amount of AIDS virus (HIV) in bloodstream |
| PCR assay & NASBA test | viral load tests |
| CT scan | xray imaging in transverse plane produces cross-sectional views of anatomic structures |
| shows abnormalities of lymphoid organs, such as spleen, lymph nodes & thymus gland | CT scan |