Stanford Sleep Surgery

Care Team

Medical Education and Training

For information about clinical instructorship and fellowship programs in Sleep Surgery at Stanford Medicine, please see

Robson Capasso is currently the Director of Sleep Surgery and Assistant Professor of Otolaryngology and Head and Neck Surgery at Stanford University School of Medicine.

His quite extensive and unique training includes medical school and otolaryngology residency in Brazil, and further residencies and fellowships in head and neck and microvascular surgery, neurosciences and sleep medicine.

Dr. Capasso has published and reviewed book chapters, articles and original papers in peer-reviewed journals, and has been an investigator on diagnostic evaluation, and surgical management of obstructive sleep apnea patients. The global recognition of his work is often associated with one of his favorite tasks: lecturing and trading knowledge around the world.

His contact with diverse healthcare systems in several countries combined with his expertise in education led to involvement with Stanford University students interested in the development of new biomedical technologies to target the complex task of improving sleep apnea evaluation and treatment.

Dr. Liu joined the Stanford University School of Medicine faculty as an Assistant Professor of Otolaryngology in 2014. He currently serves as co-director of the Stanford Sleep Surgery Fellowship Program. He practices the full scope of sleep apnea surgery. 

Dr. Liu boarded at The Lawrenceville School before attending Stanford as an undergrad. He received his medical and dental degrees from the University of California-San Francisco (UCSF). He was also a former Howard Hughes Medical Institute (HHMI) Research Scholar (Cloister Program). After maxillofacial surgery residency at UCSF, Dr. Liu completed his sleep surgery fellowship at Stanford.

In addition to the full scope of sleep apnea surgery (nasal, palatal, hypoglossal nerve stimulation, genioglossus advancement, distraction osteogenesis maxillary expansion, maxillomandibular advancement), Dr. Liu has expertise in orthognathic surgery (particularly surgery-first orthognathic surgery), and repair of complex primary and secondary facial trauma.

Dr. Liu lectures extensively in the U.S. and internationally on sleep apnea surgery. His active areas of research include dynamic airway examination in OSA, virtual surgical planning for precision facial skeletal surgery, and neuromodulation of the head and neck. He has published over 40 scientific articles and medical texts on OSA, with original scientific work on MMA, maxillary expansion, and hypoglossal nerve stimulation.

Robert W. Riley is a Clinical Professor in the Department of Otolaryngology-Head and Neck Surgery at Stanford University School of Medicine.

Dr. Riley's education and training includes a dental degree and graduate degree (MS Pharmacology) from the University of California San Francisco. A medical degree was obtained from the University of Alabama. An Oral and Maxillofacial Surgery Residency was completed at the University of California Los Angeles and Harbor General Hospital. An Otolaryngology-Head and Neck Surgery Residency was completed at Stanford University.

Dr Riley and his partner, Dr Nelson Powell, were the innovators of many of the surgical procedures used to treat Obstructive Sleep Apnea. They were the first to describe and publish the following: Cephalometric Analysis: A new method to image the airway, Mandibular Osteotomy with Genioglossus Advancement, Hyoid Myotomy and Suspension, Maxillary and Mandibular Osteotomy, The Uvulopalatal Flap: an alternative to Uvulopalatalpharyngoplasty, Cranial Bone Graft: a new method of harvest in Maxillofacial Surgery, and Radiofrequency Reduction: a new method to treat breathing and sleep apnea.

Dr Riley has published almost 100 scientific articles and medical texts. He continues to treat patients with Obstructive Sleep Apnea utilizing his 30 years of experience.