Is it worth a quick look: The role of the CXR in trauma patients

Chest and pelvis x-rays are low-sensitivity trauma tests, but they still matter when they identify immediately actionable cavitary bleeding in a sick patient. In stable trauma, CT is usually the better injury screen, and dual imaging often adds delay without changing management.

Trauma Imaging Triage

• Low-sensitivity plain films: Chest and pelvis x-rays miss injuries compared with CT, but they can still reveal a hemodynamically important hemothorax, pneumothorax, or pelvic fracture when minutes matter.
• Stable patients going to CT: If a stable trauma patient is headed for a pan-scan anyway, routine trauma-bay plain films usually add little and can delay definitive imaging and treatment.
• Rock solid trauma patients: Low-risk, normal-vitals patients who can give a clear history often need only targeted x-rays or no imaging at all, with observation and discharge decisions driven by the bedside exam.
• Sick trauma patients first: In critically ill trauma, immediate chest and pelvis films are tightly linked to management because they can trigger chest tube placement, hemorrhage control, or a decision to skip CT for the OR.
• Beyond stable versus unstable: Trauma imaging works better as a three-group model: rock solid, injured, and sick. We get into how that frame changes ordering decisions in the episode.

CT, eFAST, and Protocol Choice

• CT as injury screen: CT is the highest-yield test for stable trauma patients with concerning mechanism, unreliable exam, or altered mental status, especially when occult torso injury is the real concern.
• Pan-scan protocol pitfalls: A reflex head-to-pelvis trauma protocol can miss the right study for the patient, including delayed renal imaging, gated cardiac CT, facial imaging, or CTA for blunt cerebrovascular injury.
• eFAST for immediate threats: eFAST is most useful in resuscitation for clinically important thoracic findings such as pericardial effusion, hemothorax, and pneumothorax, where a positive study can change management immediately.
• Spinal tenderness and CT: Midline spinal tenderness should push you toward CT rather than plain films, often using reformatted images from chest, abdomen, and pelvis studies already being obtained.
• Question-driven imaging choices: The key move is to order imaging only when it answers a real management question, balancing radiation, technologist time, and the opportunity cost of delaying intubation, transfusion, or procedures.

References:

1. Treskes K, et al. Cost-effectiveness of immediate total-body CT in patients with severe trauma (REACT-2 trial). Br J Surg. 2021;108(3):277-285. PMID: 33793734
2. Hussain K, et al.  Radiology and A Radiologist: A Keystone in the Turmoil of Trauma Setting. Cureus. 2021 Apr 2;13(4):e14267. PMID: 33959449
3. Haley T, et al. Trauma: the impact of repeat imaging. Am J Surg. 2009;198(6):858-862. PMID: 19969142
4. Qamar SR, et al. Emergent Comprehensive Imaging of the Major Trauma Patient: A New Paradigm for Improved Clinical Decision-Making. Can Assoc Radiol J. 2021;72(2):293-310. PMID: 32268772
5. Burger C, et al. Schnellere Diagnostik mit digitaler Röntgentechnik im Schockraum: eine prospektive Studie bei Schwerverletzten [Faster diagnostics by digital X-ray imaging in the emergency room: a prospective study in multiple trauma patients]. Z Orthop Unfall. 2007;145(6):772-777. PMID: 18072045