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Peritoneal fluid culture   

Overview | Risks | Results

Alternative names:

Culture - peritoneal fluid

Definition:

A laboratory test performed on a sample of peritoneal fluid to isolate and identify the presence of microorganisms that cause infection (peritonitis).  Peritoneal fluid is the fluid from the peritoneal cavity, a space between two membranes lining the abdominal cavity.

How the Test is Performed

The test is performed by paracentesis, a needle aspiration of the peritoneal cavity. A sample of fluid is sent to the laboratory for gram stain  and culture preparation. The sample is examined regularly for the growth of microorganisms.

How to Prepare for the Test

Empty your bladder prior to the paracentesis procedure.

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 or procedure preparation (birth to 1 year)
• toddler test or procedure preparation (1 to 3 years)
• preschooler test or procedure preparation (3 to 6 years)
• schoolage test or procedure preparation (6 to 12 years)
• adolescent test or procedure preparation (12 to 18 years)

How the Test will Feel

A small area in your abdomen will be cleaned with an antiseptic.  You will also receive local anesthesia and will feel a  stinging sensation from the anesthetic. You  will then feel pressure as the needle is inserted. If a large amount of fluid is withdrawn, you may have a feeling of dizziness or lightheadedness.

Why the Test is Performed

The test is done to aid in the determination of whether there is an infection in the peritoneal space (peritonitis).

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