Parotid Gland Parotid Salivary Flow Rate (or Secretory Function)
This test measures how well your parotid glands (salivary glands near your ears) produce saliva. It helps assess salivary function, often used in diagnosing conditions like Sjogren’s syndrome or salivary gland blockages.
["This test checks if your salivary glands are working properly and can help identify potential issues with saliva production."]
Key facts at a glance
- LOINC
- 37223-5
- Short code
- CT Parotid gland
- Synonyms
- CT 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
- 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 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 a broader evaluation for conditions affecting saliva production or salivary gland function.
How the Test Is Performed
You’ll sit comfortably while a small tube is placed in your mouth to collect saliva from your parotid glands. The test may involve stimulating saliva flow with a small electrical stimulus or by chewing gum. The collected saliva is then analyzed to measure flow rate.
What to Expect Before the Test
No special preparation is needed, but you may be asked to avoid eating or drinking for a short time before the test. Wear comfortable clothing and bring any medications you’re currently taking.
What to Expect During the Test
The procedure is quick and usually painless. You may feel a slight tingling sensation from the electrical stimulus, but it won’t cause discomfort. The test typically takes about 10–15 minutes.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Abnormal results may indicate conditions like salivary gland inflammation, blockages, or autoimmune diseases such as Sjogren’s syndrome. Low flow rates could suggest reduced gland function, while high variability might point to underlying issues like nerve damage or glandular disorders.
Short name
Parotid Flow Rate
Frequently asked questions
How long does it take to get results from this test?
What does a low parotid flow rate mean?
Can I eat or drink before 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