Basophilsnfrprt
This test measures the percentage of basophils (a type of white blood cell) in fluid collected from the abdominal cavity.
{"The test analyzes fluid from the abdominal cavity (peritoneal fluid)","Basophils are white blood cells that help fight infections and regulate inflammation","Results help doctors diagnose infections, cancers, or other conditions in the abdominal cavity","Abnormal basophil counts may indicate bacterial infection, parasites, or certain cancers","The sample is collected via a procedure called paracentesis (abdominal tap)"}
Key facts at a glance
- LOINC
- 35069-4
- Short code
- BASOPER
- Synonyms
- Basophils NFr Prt
- Category
- chemistry
- Sample
- serum
- Container
- Sterile collection container (EDTA tube for cell counts; plain sterile tube for fluid analysis)
- Units
- N/A
- Ref low
- 0
- Ref high
- 1
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- Automated cell counter with manual differential microscopy confirmation
- CPT
- 89051
- SNOMED
- 44630005
- Specimen volume
- 5-10 mL of peritoneal fluid minimum; 20-50 mL preferred for complete analysis
- Stability
- Room temperature: 1 hour; Refrigerated (2-8°C): 4 hours. Cell morphology degrades rapidly; analyze promptly.
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 1–4 hours
- Order
- routine
What is this test?
The Basophils/Leukocytes in Peritoneal fluid test measures the percentage of basophils relative to the total number of white blood cells (leukocytes) in fluid collected from the peritoneal cavity. The peritoneal cavity is the space between the abdominal wall and the organs inside the abdomen. Normally, this space contains a small amount of fluid, but excess fluid (called ascites) can accumulate due to various medical conditions.
What are basophils?
Basophils are the least common type of white blood cell, making up less than 1% of all white blood cells in the blood. They play important roles in the immune system by: 1) Releasing histamine and other chemicals during allergic reactions, 2) Helping to fight parasitic infections, and 3) Playing a role in inflammation and wound healing.
How is the sample collected?
Peritoneal fluid is collected through a procedure called paracentesis or abdominal tap. During this procedure, a doctor inserts a thin needle through the skin into the abdominal cavity to withdraw fluid. The area is first cleaned and numbed with local anesthetic to minimize discomfort. This procedure is typically done under sterile conditions to prevent infection.
Reference range
Basophils are typically absent or rarely present in normal peritoneal fluid; basophil percentage relative to total leukocytes: <1%N/A
No special patient preparation required. Peritoneal fluid is collected via paracentesis performed by a qualified healthcare provider under sterile conditions.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings2
Frequently asked questions
Why do I need this test?
Is the test painful?
How long does it take to get results?
What happens if my results are abnormal?
Sources
- 1
- 2Mayo Clinic - AscitesSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy