The Doppler is a painless, non-invasive testing device used to assess for pulses in patients who may have circulation problems.  It can be used to assess a blood pressure when a nurse cannot hear a blood pressure using a stethoscope.  It can also be used to assess pulses in lower extremities for patients who have circulatory problems causing pain or preventing a lower extremity wound from healing (wounds require circulating oxygen to heal well).  Abnormal results are reported to the physician where orders for treatment changes may be given or may warrant a visit to the physician.