Cold stimulation test for Raynaud's phenomenon
Definition
The cold stimulation test for Raynaud's phenomenon is a test that measures the temperature of each finger after they are placed in an ice-water bath.
Alternative Names
How the test is performed
A heat sensor is taped to your fingers and the temperature is recorded. Your hand is then immersed in ice water for 20 seconds. Then it is removed from the bath and the temperature recorded every 5 minutes until your finger temperature is the same as it was before the bath.
How to prepare for the test
No special preparation is necessary for this test.
How the test will feel
There may be some discomfort while your hand is in the cold water.
Why the test is performed
This test is a screening tool for Raynaud's phenomenon.
Normal Values
Normally your finger temperature will return to normal within 15 minutes after the cold water exposure.
What abnormal results mean
You may have Raynaud's phenomenon if your finger temperature takes greater than 20 minutes to return to pre-bath temperature.
What the risks are
There are no risks associated with this test.
Special considerations
This test should not be performed if you have a finger infection or problems with the blood supply to your fingers.
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