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Parotid Gland Parotid Salivary Flow Rate or Secretory Function Test

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

This test measures how well your parotid glands (salivary glands near your ears) produce saliva. It helps assess conditions affecting saliva production, such as Sjogren’s syndrome or nerve damage.

Quick summary

["This test checks your saliva production, which can reveal issues with your salivary glands or nerves controlling them."]

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

Key facts at a glance

LOINC
37224-3
Short code
MR Parotid gland
Synonyms
MR Parotid gland
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
mr
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 This Test Is Done

Your doctor may recommend this test if you have symptoms like dry mouth, difficulty swallowing, or pain in your salivary glands. It can also be part of evaluating conditions like Sjogren’s syndrome, nerve disorders, or certain cancers that affect saliva production.

What to Expect During the Test

You’ll sit comfortably while a small tube is placed in your cheek near the parotid gland. A gentle suction device will collect saliva over a set period. The test usually takes about 10–15 minutes and is painless.

How the Results Are Interpreted

Results compare your saliva flow rate to typical values for your age and gender. Low flow may indicate problems with gland function, nerve damage, or medications that reduce saliva.

Common Conditions Affecting Results

Conditions like Sjogren’s syndrome, diabetes, or certain medications (e.g., antidepressants) can lower saliva production. Nerve injuries or tumors may also impact flow.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Parotid Flow Test

Frequently asked questions

What does a low saliva flow rate mean?
A low flow rate may suggest issues like Sjogren’s syndrome, nerve damage, or medications that reduce saliva. Your doctor will discuss findings with you and may recommend further tests or adjustments to your treatment plan.
How often should I get this test?
Frequency depends on your symptoms and health. Your doctor will determine if repeat testing is needed, especially if you have ongoing dry mouth or suspected gland-related conditions.
Can I eat or drink before the test?
Avoid eating or drinking 30–60 minutes before the test to ensure accurate results. Stay hydrated afterward if needed for comfort.
  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