👤 By the CinnaRN Clinical Content Team🕐 Updated 2026-08-23🏷️ Physiological Adaptation🔖 Free to read, print, and share
Also known as: bone marrow aspiration · marrow tap
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Use this quick-reference guide to spot, treat, and prevent Bone Marrow Biopsy on the NCLEX. Keep it handy during review and on exam day!
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📒 The 1-minute cheat sheet
📌 Def
Aspirate marrow → posterior iliac crest
Dx leukemia, anemia, cancers
✅ Do
Prone/side-lying position
Pressure 5-10 min after → ↓ bleed
Pressure dressing, ice, monitor site
🩺 Watch
Bleeding risk → check coag/platelets
Brief sharp pain on aspiration (normal)
🚩 Report
Continued bleeding, swelling, fever
Site infection, severe pain
📚 Bone Marrow Biopsy — full study notes
The cheat sheet above is your quick recall card. These notes go deeper — what it is, what to do first, what must be reported, and what to teach.
A bone marrow biopsy and aspiration remove marrow tissue, usually from the posterior iliac crest, to evaluate blood-cell production and diagnose leukemia, anemias, and other hematologic disorders. A local anesthetic is used, but the patient feels brief pressure and a pulling sensation during aspiration. Memory aid: pressure to the site is the key post-procedure action to prevent bleeding.
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Key points
Understand these first
The posterior iliac crest is the most common site; the sternum may be used for aspiration only in adults.
Patients with low platelets or clotting disorders are at higher risk for bleeding after the procedure.
The patient feels brief sharp pain or a pulling sensation when marrow is aspirated despite local anesthesia.
Firm pressure followed by a pressure dressing to the site controls bleeding afterward.
Bleeding and infection at the site are the primary post-procedure complications.
The specimen evaluates cellularity, cell lines, and abnormal cells for diagnosis.
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Nursing priorities
What to do, in order
Verify informed consent and review platelet count and coagulation studies before the procedure.
Position the patient prone or side-lying to expose the iliac crest.
Apply firm direct pressure to the site, then a pressure dressing after the needle is removed.
Monitor the site for bleeding, swelling, or hematoma and assess pain afterward.
Administer prescribed analgesics and monitor for signs of infection.
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Red flags — report now
Escalate immediately
Report uncontrolled bleeding, an expanding hematoma, or saturated dressing at the site.
Report fever, increasing pain, redness, or drainage suggesting infection.
Report signs of shock such as hypotension and tachycardia.
Never remove pressure too early in a patient with thrombocytopenia.
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Labs & values
Numbers to know
Platelets: 150,000-400,000/mm3
Hemoglobin: 12-18 g/dL (varies by sex)
WBC: 5,000-10,000/mm3
INR: 0.8-1.1
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Patient teaching
What patients must know
You will feel pressure and a brief sharp or pulling feeling when the marrow is drawn.
Keep the dressing dry and intact, and watch the site for bleeding once home.
Mild soreness for a day or two is normal; take pain medicine as directed.
Report fever, increasing pain, or bleeding that soaks the dressing.
❓ Bone Marrow Biopsy: NCLEX FAQs
What are the priority nursing interventions for Bone Marrow Biopsy?
Verify informed consent and review platelet count and coagulation studies before the procedure. Position the patient prone or side-lying to expose the iliac crest. Apply firm direct pressure to the site, then a pressure dressing after the needle is removed. Monitor the site for bleeding, swelling, or hematoma and assess pain afterward.
What are the warning signs of Bone Marrow Biopsy a nurse must report?
Report uncontrolled bleeding, an expanding hematoma, or saturated dressing at the site. Report fever, increasing pain, redness, or drainage suggesting infection. Report signs of shock such as hypotension and tachycardia. Never remove pressure too early in a patient with thrombocytopenia.
What do I need to know about Bone Marrow Biopsy for the NCLEX?
The posterior iliac crest is the most common site; the sternum may be used for aspiration only in adults. Patients with low platelets or clotting disorders are at higher risk for bleeding after the procedure. The patient feels brief sharp pain or a pulling sensation when marrow is aspirated despite local anesthesia. Firm pressure followed by a pressure dressing to the site controls bleeding afterward.
What patient teaching is important for Bone Marrow Biopsy?
You will feel pressure and a brief sharp or pulling feeling when the marrow is drawn. Keep the dressing dry and intact, and watch the site for bleeding once home. Mild soreness for a day or two is normal; take pain medicine as directed. Report fever, increasing pain, or bleeding that soaks the dressing.
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Quick Tip
The posterior iliac crest is the most common site; the sternum may be used for aspiration only in adults.