Abdominal tap - paracentesis
Key points
- The abdomen usually contains a small amount of fluid.
- This test may be done in an office setting, in a treatment room, or in a hospital.
- Inform your health care provider if you have any allergies to medications or anesthetic, are taking any medications (including herbal remedies), have any bleeding problems, or might be pregnant.
- The physical and psychological preparation you can provide for this or any test or procedure depends on your child's age, interests, previous experience, and level of trust.
Alternative names
Peritoneal tap; Paracentesis
Definition
The abdomen usually contains a small amount of fluid. In certain conditions, fluid can accumulate in the abdomen. The abdominal tap is a procedure in which a needle is inserted through the abdominal wall into the peritoneal cavity to obtain a sample of any fluid that is present. The sample is then sent to the laboratory for analysis.
How the test is performed
This test may be done in an office setting, in a treatment room, or in a hospital.
The puncture site will be cleansed and shaved, if necessary. You then receive a local anesthetic.
The tap needle is inserted 1 to 2 inches into the abdomen. Sometimes a small incision is made to help insert the needle.
The sample of fluid is then withdrawn into a syringe. The needle is removed, and a dressing is applied to the puncture site. If an incision was made, one or two stitches may be used to close it.
How to prepare for the test
Inform your health care provider if you have any allergies to medications or anesthetic, are taking any medications (including herbal remedies), have any bleeding problems, or might be pregnant.
Infants and children:
The physical and psychological preparation you can provide for this or any test or procedure depends on your child's age, interests, previous experience, and level of trust. For specific information regarding how you can prepare your child, see the following topics as they correspond to your child's age:
- Infant test/procedure preparation (birth to 1 year)
- Toddler test/procedure preparation (1 to 3 years)
- Preschooler test/procedure preparation (3 to 6 years)
- Schoolage test/procedure preparation (6 to 12 years)
- Adolescent test/procedure preparation (12 to 18 years)
How the test will feel
You may feel a stinging sensation from the anesthetic and/or pressure as the needle is inserted.
If a large amount of fluid is withdrawn, you may experience dizziness or lightheadedness. Tell the health care provider if you feel dizzy.
Written and revised by
Andrey Nailor, M.D.
Our doctors write and review articles for accuracy and keep them up to date.
health.am provides general information, not medical advice. Always consult a qualified health professional about your own health.