Our Staff

Euclid Endoscopy Center Staff

John G. Keenan CRNA, MS

Chair Anesthesia Services, Paradise Valley Hospital
National City California
Lieutenant Commander, United States Navy Retired


John G. Keenan CRNA, MS, currently serves as Chair for Anesthesia Services at Paradise Valley Hospital, a 295-bed acute care community hospital located within San Diego County. A proud United States Navy Veteran of 22 years, John received his Anesthesia Training and served as Chief Nurse Anesthetist Naval Medical Center San Diego, CA. Since his Navy retirement in 2007, John has been affiliated with Prime Healthcare, USCD Medical Center, and numerous Critical Access Hospitals. He served as a consultant and leader in the development of the San Diego Spine and Joint Center, which opened April 2014. He also serves as President to Southern California Gastroenterology Anesthesia Specialists that employs 12 Certified Registered Nurse Anesthetists.




Afra M. Roet, PA-C

Physician Assistant


  • Sub-Investigator, Precision Research Institute, San Diego, CA
  • Physician Assistant, Gastroenterology, Sharp Rees-Stealy Medical Group, Inc., San Diego, CA
  • Physician Assistant, operation Samahan, National City, CA
  • Physician Assistant, Family health Centers of San Diego, San Diego, CA
  • Physician Assistant, Nuclear Claims Tribunal, Government of Marshal Islands, Republic of the Marshal Islands
  • Physician Assistant, Ob-Gyn and Adult Medicine, San Ysidro Health Center, San Ysidro, CA
  • Physician Assistant, Cuba Health Center, Cuba NM





Our Registered Nurse (RNs) and LVNs staff ensures that you receive safe, high quality care while in the center. These professionals uphold the standards of the Society of Gastrointestinal Nurses and Associates. With an average of 15 years experience, this dedicated staff provides skilled care with confidence, reflecting a lifelong commitment to quality.



GI Technicians

These skilled individuals assist your physician and nurses as well as maintain our state-of-the art equipment and your care environment. They all receive specialized training in order to develop expertise in this setting and regular training to keep their skills sharp. All are credentialed in Basic Life Support.