Methodology: 2/5
Usefulness: 2.5/5

Macri F, Greffier J, Khasanova E, Claret PG, Bastide S, Larbi A, Bobbia X, Pereira FR, de la Coussaye JE, Beregi JP. Ann Emerg Med. 2019 Jun;73(6):665-670. 

Question and Methods: This 160-patient pilot study prospectively compared ultra-low dose CT chest and CXR to routine CT chest in minor blunt thoracic trauma patients.

Findings: ULD-CT chest was 100% sensitive and specific, with a similar degree of radiation exposure to CXR (0.203 vs. 0.175mSv; p=.14), and reasonable interobserver diagnostic reliability (kappa 0.88-1.00).

Limitations: The clinical importance of occult injuries was not evaluated and test characteristics of ULD-CT were calculated based on the interpretations of a single radiologist experienced in this modality.

Interpretation: More research is required to ascertain its benefit to patients, cost-effectiveness and external validity prior to incorporation into practice.

By: Dr. Nicholas Prudhomme

Hans Rosenberg
Dr. Rosenberg is an emergency physician at the Ottawa Hospital, assistant professor at the University of Ottawa, and Director of the Digital Scholarship and Knowledge Dissemination Program.