Part of the Medical Emergencies practice questions exam area.
This page holds 200 free practice questions for Chapter 25, Hematologic Emergencies, covering blood components and physiology, hemostasis and the clotting cascade, anemias, sickle cell disease and its crises, leukemia, lymphoma, and myeloma, hemophilia, von Willebrand disease, ITP, DIC, thrombosis and anticoagulants, and transfusion reactions. They are written for paramedic and EMT students working through Nancy Caroline's Emergency Care in the Streets, 9th edition. Every question shows the correct answer with a short explanation as soon as you tap, so you learn while you test rather than waiting until the end.
Study it two ways: the 10 Question Blitz, a quick round where every right answer lights a siren and any misses lead into Lights & Sirens, a 5-in-a-row drill on that section, or the full 100-question test drawn at random from the whole chapter. After each test you get a score and a section-by-section breakdown. Progress on the full test is saved on your device, so you can stop and pick up later.
A man reaches the ED 20 minutes after losing a large amount of blood from a leg wound. His first hematocrit is close to normal. The best explanation is that:
Answer: B. Cells and plasma were lost together
Whole blood is lost, so the ratio of cells to plasma stays about the same at first. The hematocrit falls over hours as fluid shifts into the vessels or IV fluid is given, so a normal early value does not rule out major hemorrhage. Marrow replacement and erythropoietin take days to have any effect.
The coagulation cascade in a wound is triggered mainly when blood contacts:
Answer: D. Tissue factor from damaged cells
Damaged tissue exposes tissue factor, which activates factor VII and starts the cascade. Air exposure does not cause clotting, crushed red cells do not start it, and plasmin breaks clots down rather than forming them.
Petechiae are:
Answer: C. Tiny red dots that do not blanch
Petechiae are pinpoint bleeds into the skin. They suggest a low platelet count or a platelet function problem.
Most students use the 10 Question Blitz for daily practice and take the full 100-question test in the days before a class exam or NREMT practice. Lights & Sirens after a blitz is the fastest way to close gaps the night before a test.
Every question in this chapter is also listed by section, with answers, on the topic pages above. See all paramedic topics or take the NREMT paramedic practice test.
Ch. 1 Ch. 2 Ch. 3 Ch. 4 Ch. 5 Ch. 6 Ch. 7 Ch. 8 Ch. 9 Ch. 10 Ch. 11 Ch. 12 Ch. 13 Ch. 14 Ch. 15 Ch. 16 Ch. 17 Ch. 18 Ch. 19 Ch. 20 Ch. 21 Ch. 22 Ch. 23 Ch. 24 Ch. 25 Ch. 26 Ch. 27 Ch. 28 Ch. 29 Ch. 30 Ch. 31 Ch. 32 Ch. 33 Ch. 34 Ch. 35 Ch. 36 Ch. 37 Ch. 38 Ch. 39 Ch. 40 Ch. 41 Ch. 42 Ch. 43 Ch. 44 Ch. 45 Ch. 46 Ch. 47 Ch. 48 Ch. 49 Ch. 50 Ch. 51 Ch. 52 Ch. 53
These practice questions were written for this site. They are not the publisher's test bank and are not affiliated with or endorsed by Jones & Bartlett Learning, the American Academy of Orthopaedic Surgeons, or the National Registry of Emergency Medical Technicians. Use them alongside your textbook and your instructor's objectives.