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Chapter 5. Surgical Hemostasis and Clotting Mechanisms
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Why is a bleeding history more likely to reveal a bleeding disorder, than screening tests of coagulation?
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A. The PT/PTT tests do not measure fibrinolytic bleeding.
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B. The bleeding time often misses mild von Willebrand disease.
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C. Antiplatelet drugs such as Plavix may not affect the PT/PTT or bleeding time.
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D. A bleeding history is likely to uncover hemostatic stress such as dental extractions.
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Which of the following are true statements regarding the differences or similarities between standard UFH and LMWH?
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A. Both UFH and LMWH prolong the PTT.
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B. Only LMWH requires monitoring using the PTT or anti-Xa.
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C. Only LMWH requires dose adjustment in renal failure.
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D. A weight-based nomogram for UFH avoids the need for PTT monitoring.
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E. Only UFH is a polysaccharide with a specific binding site for AT-III.
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Which of the following statements are true regarding typical HIT?
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A. The platelet drop in HIT is less than 100,000.
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B. The platelet drop in HIT is 50% or more from baseline.
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C. The drop in platelets is typically 24 hours after heparin exposure.
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D. The drop in platelets never occurs days after heparin is stopped.
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E. HIT is more common with the use of LMWH.
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Which of the following statements are true regarding DIC?
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A. DIC is diagnosed by specific laboratory findings.
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B. DIC is only a clinical diagnosis.
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C. DIC can manifest clinically in overt and occult syndromes.
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D. DIC is always treated by heparin therapy to stop thrombosis.
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E. The D-dimer test is diagnostic of DIC.
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A 35-year-old woman presents to emergency room (ER) with history of bruising easily over the past 1½ week. She also reports a large bruise over the right thigh associated with pain and difficulty in walking and also another bruise on her left forearm that was spontaneous. She did not have history of a fall ...