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Physiological AdaptationDrain ascites from abdomen

ParacentesisNCLEX cheat sheet

Paracentesis is the insertion of a needle or catheter into the peritoneal cavity to remove ascitic fluid for diagnostic analysis or therapeutic relief of pressure, most often in cirrhosis or malignancy.

23 key facts 2 practice questions Reviewed Oct 2026
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Def

  • Needle drains peritoneal fluid
  • Relieves ascites (often cirrhosis)

Before

  • VOID first → empty bladder
  • High-Fowler's/upright position
  • Baseline weight, abd girth, consent

After

  • Monitor VS → risk hypovolemia
  • Drain slow (≤1L) → avoid shock
  • Dressing → check leakage

Report

  • Hypotension, tachycardia, dizziness
  • Fever, ↑ pain → peritonitis
Red flag to remember

Report sudden hypotension, tachycardia, dizziness, or pallor indicating hypovolemic shock from fluid shift.

Before you read

Test yourself first: 2 questions

Question 1 of 2

A client with cirrhosis is scheduled for a paracentesis to relieve ascites. Which nursing action is essential immediately before the procedure?

What is paracentesis?

It relieves dyspnea, abdominal pressure, and discomfort caused by fluid accumulation. Memory aid: PARA = pull abdominal-fluid; pee first to protect the bladder.

Key points to remember

  • The patient must void immediately before the procedure to empty the bladder and prevent accidental puncture.
  • Position the patient upright (high Fowler's or sitting at the edge of the bed) so fluid pools low and the bowel floats away from the needle.
  • Removing large volumes (more than 4-6 liters) can cause hypovolemia and hypotension from fluid shifting back into the peritoneal space.
  • Albumin (a colloid volume expander) is often given when large amounts of fluid are removed to prevent circulatory dysfunction.
  • The site is below the umbilicus and the procedure is done with sterile technique under local anesthetic.
  • Fluid is sent for cell count, culture, albumin, and protein to assess for spontaneous bacterial peritonitis.

Nursing priorities

  1. Obtain baseline weight, abdominal girth, and vital signs, and verify a signed informed consent.
  2. Have the patient void or insert a catheter to empty the bladder before the tap.
  3. Monitor vital signs frequently during and after for hypotension and tachycardia signaling hypovolemia.
  4. Measure, describe, and document fluid amount, color, and characteristics, and send specimens to the lab.
  5. After the procedure, apply a dressing, monitor the site for leakage, and recheck weight and girth.

Labs & values

Serum albumin:3.5-5.0 g/dL
Total protein:6.0-8.0 g/dL
Platelets:150,000-400,000/mm3 (check before tap)
INR: 0.8-1.1 (assess bleeding risk in liver disease)
3.55.0g/dL Normal

Patient teaching

  • Empty your bladder right before the procedure to keep it safe.
  • Tell the nurse if you feel lightheaded, dizzy, or short of breath afterward.
  • Report any fluid leaking from the puncture site once you are home.
  • Some pressure or a tugging sensation is normal, but sharp pain is not.

Red flags: report now

  • Report sudden hypotension, tachycardia, dizziness, or pallor indicating hypovolemic shock from fluid shift.
  • Report fever, increasing abdominal pain, or cloudy fluid suggesting peritonitis.
  • Report persistent fluid leakage, frank bleeding, or hematuria after the procedure.
  • Never proceed without confirming the bladder is empty.

References

Clinical references for this topic

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