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RVT ARDMS exam review Study Guide 2025.pdf
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3 causes of venous thrombosis also called, Virchow's Triad - ✔Venous stasis, trauma/endothelial damage, hypercoagulability Venous stasis - ✔Slowed blood flow in veins. Caused by immobility, myocardial infarction, CHF, hypotension, COPD, obesity, pregnancy, previous DVT, extrinsic compression, SVC syndrome, paraplegia, surgery associated conditions. 2 types of Trauma/endothelial damage - ✔Intrinsic and extrinsic Intrinsic trauma is - ✔Damage to the vessel wall from intravenous drugs or a catheter. Increased use of PICC line results in higher incidence of upper extremity thrombus, usually developing at most proximal portion of PICC line. Extrinsic trauma is - ✔Damage caused by an accident, which can occur at any site of the body. Hypercoagulability is associated with - ✔Pregnancy, cancer, oral contraceptives and/or hormone replacement therapy, inherited states,e.g., factor V Leiden or protein C, protein S, or Antithrombin III deficiency Sensitivity, and How to calculate? - ✔-Ability of a test to detect disease, how many tests are correctly called positive.
Specificity, and how to calculate? - ✔-Ability of a test to identify normality, or how many results were correctly called negative.
Positive predictive value, and how to calculate? - ✔-percentage of test results that accurately predict abnormality, or what % correctly predicted disease.
Negative predictive value, and how to calculate? - ✔- percentage of test results that accurately predict normality, or what % correctly predicted absence of disease.
Accuracy, and how to calculate? - ✔- % of correct tests, or how well does the test both detect and rule out disease.
What are varicose veins? - ✔Enlarged veins that appear as purple or blue and may appear twisted and/or bulging near skin surface.
✔-Uses a precise amount of light that is pulsed through a special hand piece in order to target the vein or reddened skin area