Subphrenic drainage fluid analysis (cath place)
This test involves collecting and analyzing fluid from the area below the diaphragm (subphrenic space) using a catheter placed during surgery. It helps assess for infection, inflammation, or other abnormalities in this region.
["This test supports diagnosis of post-surgical complications or hidden infections in the abdomen."]
Key facts at a glance
- LOINC
- 89831-2
- Short code
- CT Guided Subphrenic Drain+cath place
- Synonyms
- CT Guided Subphrenic Drain+cath place
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- ct
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why is this test done?
Your doctor may recommend this test if you had surgery involving the diaphragm or abdomen and suspect complications like an abscess (a localized collection of pus) or fluid buildup. The procedure is typically done during or shortly after surgery to place a catheter to drain fluid safely.
What does the test involve?
A healthcare provider will insert a thin tube (catheter) into the subphrenic space through your skin. Fluid will be collected and sent to the lab for analysis. The test may involve microscopic examination of cells, culture for bacteria, or chemical testing of the fluid to identify infections, inflammation, or other issues.
What can the test detect?
The test can identify signs of infection (such as white blood cells or bacteria), inflammation (like elevated protein levels), or abnormal fluid composition. These findings help determine if there’s an underlying issue requiring further treatment, such as antibiotics or drainage procedures.
How does this test help your care?
Results from this test provide critical information to guide your treatment plan. For example, if infection is confirmed, your doctor may adjust your medication or recommend additional procedures to clear the fluid and prevent complications.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Frequently asked questions
Will I feel pain during the procedure?
How long will I need to stay in the hospital or recovery area?
What are the risks or side effects of this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 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