<prompt> Answer this question truthfullyWhat are the other diagnostic tests for Upper Airway Resistance Syndrome?  <response>: <reason> It is difficult to confirm diagnosis, as few sleep testing centers have the proper test equipment to recognize the illness.Polysomnography sleep study with the use of a probe to measure Pes esophageal pressure is the gold standard diagnostic test for UARS. Apneas and hypopneas are absent or present in low numbers. Multiple snore arousals may be seen, and if an esophageal probe Pes is used, progressive elevation of esophageal pressure fluctuations terminating in arousals is noted. UARS can also be diagnosed using a nasal cannulapressure transducer to measure the inspiratory airflow vs time signal. 