Contrast-associated acute kidney injury is a controversial subject. The available evidence is reassuring that significant acute kidney injury, death, and need for renal replacement therapy are rare after IV contrast administration.

Ultralow-dose chest CT (ULCT) had perfect diagnostic accuracy for minor traumatic injury to the chest. It was superior to plain CXR and delivered the same, or in several cases, a lower radiation dose.

Use of alteplase from 4.5 to 9 hours in patients with ischemic stroke but with salvageable brain on perfusion imaging was superior to placebo (aRR 1.44, 95%CI 1.01-2.06; NNT = 17). Symptomatic hemorrhage was more common in the alteplase group.

The Pregnancy-Adapted YEARS Algorithm safely and accurately ruled out pulmonary embolism (PE) for pregnant patients and reduced the rate of CT pulmonary angiography (CTPA) across all trimesters.

There was no statistical difference in inadequate vascular filling for CT pulmonary angiogram (CTPA) if the IV catheter was smaller than 20 gauge (ga) or if it was not in the antecubital fossa (AC) or forearm. Read on for the caveats.

Pan-scan (whole body CT) vs selective CT did not impact in-hospital mortality in traumatized children ≤16 years old.

The prevalence of traumatic brain injury (TBI) on CT in children with head injury presenting > 24 hours post-injury was 3.8%. Predictors on TBI on CT were suspicion of depressed skull fracture and non-frontal scalp hematoma.

Trauma patients with blunt (and maybe penetrating) chest injury, who had a pneumothorax ≤35mm on CT did well without a thoracostomy tube, with only 9% failing observation only.

This expert panel came up with a comprehensive algorithm to clear the c-spine in children with trauma.

The PECARN rule for blunt abdominal trauma in children had high sensitivity, 99%, in this retrospective review. A prospective validation study would give us greater confidence to use this in clinical practice.