Our success is intimately linked to the accomplishments of each and every member of our department.
Each month, four members are nominated and featured to celebrate their commitment to patient care, education, and research.
Current Featured Anesthesiology Department Members

Andrew Griesbaum, ACNP
Nurse Practitioner

Qin Liu, PhD
Professor of Anesthesiology

Jake Meinkoth
Clinical Informaticist

Sydney Tyler, MD
Resident Physician
Featured Anesthesiology Department Members Archive
Jeff Piontek, CRNA
Certified Registered Nurse Anesthetist
Department of Anesthesiology Featured Member: November 2024
Jeff is a nurse anesthetist at Missouri Baptist Medical Center, primarily working with Labor and Delivery (L&D). He earned his nursing degree from Saint Louis University and graduated as a CRNA from Goldfarb School of Nursing in 2000. Jeff has been with the WashU Medicine Department of Anesthesiology since 2007, spending 12 years at Barnes-Jewish West County Hospital before transferring to L&D.
Jeff lives in Lake St. Louis with his wife, Amy, and their cat, Bob Ross. In their free time, they enjoy traveling to visit their three children in Chicago, North Carolina, and Kirksville, MO. Jeff is also an avid supporter of Chelsea FC and a fan of the Kansas City Chiefs.
A fun fact about Jeff: he met Chuck Norris in New Orleans during Mardi Gras in 1994 and can confirm that he’s a nice guy.
Melissa Prewitt, AGACNP-BC
Nurse Practitioner
Department of Anesthesiology – APP of the Quarter: June 2021
Melissa graduated with a BSN from the University of Arkansas, Fort Smith, in 2011 and obtained her MSN, Adult Gero Acute Care Nurse Practitioner (AGACNP) from the University of Southern Indiana, Evansville, in 2020. She has practiced as an RN in the SICU at Northwest Medical Center, Springdale, Arkansas, from 2011-2013 and the CVICU at Washington Regional Medical Center, Fayetteville, from 2013-2020. While at Washington Regional, Melissa served as Nurse Residency Facilitator and Critical Care Coordinator. Melissa joined the APP group in September 2020 and staff in the CTICUs.
Melissa was named the Q2 2021 APP of the Quarter! Her nominator says, “She is highly motivated and took initiative by looking up patients before her shifts and studying at home with any procedures or devices she wasn’t familiar with. You can tell she cares about her patients and is always advocating for them. She also is a great team player, and I know I can always count on her if I need help.”
Diana Prichard, CRNA
Certified Registered Nurse Anesthetist
Department of Anesthesiology Featured Member: November 2019
Diana received her Masters Degree from Missouri State University and has been serving as chief CRNA at Barnes West County Hospital since 2015. Diana has two children; Cade age 9 and Evie age 7. Diana and her family love to travel the world together and completed a 7 week, 8 country trip across Asia, Australia and Central America. She and her husband, Wayne, recently opened a restaurant in Des Peres. In her spare time she enjoys reading, cooking, playing trivia and watching the Cardinals.
Debra Pulley, MD
Professor, Anesthesiology
Department of Anesthesiology Featured Member: December 2023
Debra Pulley, MD, is a Professor of Anesthesiology and she has been a member of the Department of Anesthesiology for many years.
Dr. Pulley’s interest in medicine began when she worked as an environmental engineer, managing the proper handling of hazardous waste and learning about the toxic effects of chemicals. After medical school, she chose anesthesiology which led her to WashU!
She has worked in the operating rooms, labor/delivery, and the preoperative clinic CPAP. Dr. Pulley values her coworkers and enjoys the enthusiasm of new learners. Over the years, she has learned to appreciate both the resiliency and frailty of the human body, and has dedicated her career to treating patients during critical periods of their lives.
Dr. Pulley is a Midwesterner at heart but loves traveling to different regions of the country and taking easy hikes to scenic views. She also enjoys being a wife, mother of two, and grandmother to three energetic kids.