Raynaud’s Syndrome

A Raynaud’s Syndrome evaluation is designed to detect cold sensitivity in the hands or feet caused by spasms of the small arteries in the fingers or toes.              

Why is Raynaud’s Syndrome evaluation performed?

This test is used to:

  • Evaluate the small arteries of the fingers and/or toes for evidence of arterial spasm following cold exposure, which can cause color changes in the fingers and/or toes.

Can I eat or drink on the day of the test?

Yes. Eat and drink as you normally would the day of the test (unless you are also scheduled that day for an ultrasound exam that requires fasting).


Should I take my medications the day of the test?

Take all of your medications at the usual times, as prescribed by your doctor.


What happens during the test?

  • A vascular sonographer will perform the Raynaud’s Syndrome evaluation.
  • To document the arterial pulse in your fingers or toes, the sonographer will tape a small sensor to the finger or toe being evaluated.  The sonographer will also wrap a small blood pressure cuff around the finger or toe.  Arterial waveforms will be obtained and a blood pressure will be taken on every finger/toe on both hands/feet.
  • You will be asked to hold your hand or foot in a bowl of ice water for 3 minutes.  The sonographer will guide you through this.  After cold immersion, waveforms and blood pressures will be retaken.

How will I feel during the test?

You may feel discomfort in your hand or foot while it is immersed in ice water.


How long does the test take?

This exam usually takes about 60-75 minutes, depending on many variables. After the test, you may go home or go to your other scheduled appointments.


How do I get the results of my test?

After a vascular surgeon has interpreted your exam, the results will be sent to your referring physician and/or the vascular surgeon will go over the results with you during a follow-up appointment.