Before the test Purpose of test Detects Raynaud's syndrome. Commercial laboratory, hospital, doctor's office. Lab technician, nurse, doctor. This test is hazardous if you have gangrenous fingers or open, infected wounds on your hands. You may be asked not to take this medication before the test.
Discomfort disappears when the test is finished.
Description of test Thermistor is taped to each finger. Temperature is recorded. Hands are submerged in ice water for 20 seconds. Hands are removed from ice water. Temperature of fingers is measured immediately and every 5 minutes until normal temperature returns.