Gary Alan Bass, MD, MBA, FEBS (Em Surg)

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Assistant Professor of Surgery at the Hospital of the University of Pennsylvania
Senior Fellow, Leonard Davis Institute for Health Economics, University of Pennsylvania, Philadelphia, PA
Division of Trauma Representative to UPHS Airway Safety Committee, UPHS Airway Safety Committee
Senior Scholar, Center for Perioperative Outcomes Research and Transformation (CPORT) at the University of Pennsylvania
Department: Surgery

Contact information
Division of Traumatology, Emergency Surgery & Surgical Critical Care
Penn Presbyterian Medical Center
Medical Office Building Suite 120, 51 N. 39th Street
Philadelphia, PA 19104
Office: 215-662-8819
Fax: 215-243-4679
BSc (Physiology)
University College Dublin, Dublin, Ireland, 2001.
MSc (Physiology )
University College Dublin, Dublin, Ireland, 2005.
MD (Medicine)
Royal College of Surgeons in Ireland, Dublin, Ireland, 2008.
PgDip (Trauma Sciences)
Queen Mary, University of London, London, United Kingdom, 2016.
PGCert (Healthcare Management)
University College Dublin, Dublin, Ireland, 2017.
eMBA (Business Administration)
Quantic School of Business, Washington, DC, 2019.
CCEB (Clinical Epidemiology and Biostatistics)
University of Pennsylvania, Philadelphia, PA, 2021.
PhD (Surgical Sciences)
Orebro University, Orebro, Sweden, 2024.
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Description of Clinical Expertise

Emergency General Surgery, Trauma Surgery and Surgical Critical Care

Description of Other Expertise

Google Scholar List of Publications:

Description of Research Expertise

Prospective multi-center observational cohort studies, randomized control trials and retrospective surgical outcomes observational studies in Trauma, Emergency General Surgery, and Surgical Critical Care. Leveraging this surgical outcomes research, as it intersects with mixed-methods implementation science to better inform data-driven clinician decision support and patient outcomes.

Selected Publications

Trivedi DJ, Bass GA, Forssten MP, Scheufler KM, Olivecrona M, Cao Y, Ahl Hulme R, Mohseni S: The significance of direct transportation to a trauma center on survival for severe traumatic brain injury. European Journal of Trauma & Emergency Surgery 48(4): 2803-2811, Aug. 2022 Notes: Epub Feb. 28, 2022.

Bass GA, Duffy CC, Kaplan LJ, Sarani B, Martin ND, Ismail AM, Cao Y, Forssten MP, Mohseni S.: The revised cardiac risk index is associated with morbidity and mortality independent of injury severity in elderly patients with rib fractures. Injury 2023.

Zebley JA, Estroff JM, Forssten MP, Leighton N, Bass GA, Sarani B, Mohseni S.: Racial Disparity in Placement of Intracranial Pressure Monitoring: A TQIP Analysis. J Am Coll Surg 236: 81-92, Jan 2023.

Bass GA, Kaplan LJ, Forssten MP, Walsh TN, Cao Y, Mohseni S; ESTES SnapAppy Group.: Techniques for mesoappendix transection and appendix resection: insights from the ESTES SnapAppy study. Eur J Trauma Emerg Surg Jan 2023.

Mohseni S, Bass GA, Forssten MP, Casas IM, Martin M, Davis KA, Haut ER, Sugrue M, Kurihara H, Sarani B, Cao Y, Coimbra R: Common bile duct stones management: A network meta-analysis. Journal of Trauma & Acute Care Surgery 93: e155-e165, Aug. 5 2022 (Epub) Notes: doi: 10.1097/TA.0000000000003755.

Bass GA, Kaplan LJ, Ryan ÉJ, Cao Y, Lane-Fall M, Duffy CC, Vail EA, Mohseni S: The snapshot audit methodology: Design, implementation and analysis of prospective observational cohort studies in surgery. European Journal of Trauma & Emergency Surgery July 15 2022 (Epub) Notes: doi: 10.1007/s00068-022-02045-3.

Bass GA, Stephen C, Forssten MP, Bailey JA, Mohseni S, Cao Y, Chreiman K, Duffy C, Seamon MJ, Cannon JW, Martin ND: Admission triage with pain, inspiratory effort, cough score can predict critical care utilization and length of stay in isolated chest wall injury. Journal of Surgical Research 277: 310-318, Sept. 2022 Notes: Epub May 6, 2022.

Duffy CC, Bass GA, Fitzpatrick G, Doherty EM: What can we learn from the past? Pandemic health care workers' fears, concerns, and needs: A Review. Journal of Patient Safety 18(1): 52-57, Jan. 1 2022.

Forssten MP, Bass GA, Scheufler KM, Mohammad Ismail A, Cao Y, Martin ND, Sarani B, Mohseni S: Mortality risk stratification in isolated severe traumatic brain injury using the revised cardiac risk index. European Journal of Trauma & Emergency Surgery Nov. 27 2021 (Epub) Notes: doi: 10.1007/s00068-021-01841-7.

Forssten MP, Ioannidis I, Mohammad Ismail A, Bass GA, Borg T, Cao Y, Mohseni S: Dementia is a surrogate for frailty in hip fracture mortality prediction. European Journal of Trauma & Emergency Surgery Mar. 30 2022 (Epub) Notes: doi: 10.1007/s00068-022-01960-9.

Pourlotfi A, Ahl R, Bass GA, Sjolin G, Cao Y, Matthiessen P, Mohseni S: Statin therapy is associated with decreased 90-day postoperative mortality after colon cancer surgery. Diseases of the Colon & Rectum 65(4): 559-565, Apr. 1 2022 Notes: Epub Oct. 8, 2021.

Flanagan M, Ryan J, Bass G, Barry K, Traynor O, McMonagle M: Competency in trauma surgery: A national survey of trainees and consultants. Irish Journal of Medical Science Aug. 15 2022 (Epub) Notes: doi: 10.1007/s11845-022-03117-4.

Forssten MP, Mohammad Ismail A, Borg T, Cao Y, Wretenberg P, Bass GA, Mohseni S: The consequences of out-of-hours hip fracture surgery: Insights from a retrospective nationwide study. European Journal of Trauma & Emergency Surgery 48(2): 709-719, Apr. 2022 Notes: Epub Oct. 7, 2021.

COVIDSurg Collaborative; GlobalSurg Collaborative: SARS-CoV-2 infection and venous thromboembolism after surgery: An international prospective cohort study. Anaesthesia 77(1): 28-39, Jan. 2022 Notes: Epub Aug. 24, 2021; Dr. Bass is a member of the COVIDSurg Collaborative and the GlobalSurg Collaborative and provided data for this publication.

Hulme RA, Forssten MP, Pourlotfi A, Cao Y, Bass GA, Matthiessen P, Mohseni S: The association between revised cardiac risk index and postoperative mortality following elective colon cancer surgery: A retrospective nationwide cohort study. Scandinavian Journal of Surgery 111(1): 14574969211037588, Jan.-Mar. 2022 Notes: Epub Oct. 3, 2021.

Bass GA, Dzierba AL, Taylor B, Lane-Fall M, Kaplan LJ: Tertiary peritonitis: Considerations for complex team-based care. European Journal of Trauma & Emergency Surgery 48(2): 811-825, Apr. 2022 Notes: Epub July 24, 2021.

Bass GA, Forssten M, Pourlotfi A, Ahl Hulme R, Cao Y, Matthiessen P, Mohseni S: Cardiac risk stratification in emergency resection for colonic tumours. BJS Open 5(4): zrab057, July 6 2021.

Bass GA, Pourlotfi A, Donnelly M, Ahl R, McIntyre C, Flod S, Cao Y, McNamara D, Sarani B, Gillis AE, Mohseni S: Bile duct clearance and cholecystectomy for choledocholithiasis: Definitive single-stage laparoscopic cholecystectomy with intraoperative endoscopic retrograde cholangiopancreatography versus staged procedures. Journal of Trauma & Acute Care Surgery 90(2): 240-248, Feb. 1 2021.

Bass GA, Gillis A, Cao Y, Mohseni S; European Society for Trauma, Emergency Surgery (ESTES) Cohort Studies Group: Patterns of prevalence and contemporary clinical management strategies in complicated acute biliary calculous disease: An ESTES 'snapshot audit' of practice. European Journal of Trauma & Emergency Surgery 48(1): 23-35, Feb. 2022 Notes: Epub July 7, 2020; Correction published in EJTES 48(1): 37-38, Feb. 2022, PMID 33877404.

Cao Y, Bass GA, Ahl R, Pourlotfi A, Geijer H, Montgomery S, Mohseni S: The statistical importance of P-POSSUM scores for predicting mortality after emergency laparotomy in geriatric patients. BMC Medical Informatics & Decision Making 20(1): 86, May 7 2020.

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Last updated: 08/24/2023
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