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Open-Closed Status Test (Qualitative Urine Flow Analysis)

Published: August 9, 2026Updated: August 16, 2026

This test evaluates whether your urine flow is open (normal) or closed (blocked), often checked during a urodynamic study or cystoscopy. It helps identify issues like urinary retention or obstruction.

Quick summary

["Determines if your bladder drains urine freely or if there’s a blockage in your urinary system."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
71501-1
Short code
OPENCLOSEDSTATUS
Synonyms
—
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
esrd
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

What This Test Measures

The test measures whether urine can flow freely from your bladder into the urethra. If the flow is 'open,' urine moves smoothly. If 'closed,' it suggests a blockage (e.g., prostate enlargement, strictures, or other obstructions).

Common Causes of a Closed Flow

Blockages may result from conditions like benign prostatic hyperplasia (BPH), urethral strictures, tumors, or neurological issues affecting bladder control. Open flow is typical in healthy individuals with no obstruction.

When You Might Need This Test

Your doctor may order this test if you have symptoms like frequent urination, incomplete bladder emptying, pain during urination, or if you’ve had a recent procedure (e.g., catheterization) to rule out blockages.

What to Expect Before the Test

No special preparation is needed. You may be asked to empty your bladder completely before the test, or a catheter may be used to collect urine for analysis. The procedure is quick and often done in a clinic or hospital setting.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Urine Flow Pattern Assessment

Frequently asked questions

Why is this test important?
This test helps diagnose urinary tract obstructions, which can lead to complications like kidney damage, urinary infections, or chronic retention. Early detection allows for timely treatment, such as medication, lifestyle changes, or surgical intervention.
Is this test painful?
Most patients report minimal discomfort. If a catheter is used, it may cause slight pressure or mild discomfort, but it’s usually temporary. Always ask your doctor about pain management options.
How long does it take to get results?
Results are typically available immediately during the procedure or within a few hours. Your doctor will discuss them with you based on your symptoms and medical history.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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