Side-by-side comparison helps you choose the right calculator for a specific clinical question.
Emergency
Apply the NEXUS criteria to determine if cervical spine imaging is needed after trauma. All 5 criteria absent gives 99.8% NPV for significant C-spine injury, safely avoiding CT or X-ray.
Formula
All 5 criteria absent → c-spine can be cleared. Any criterion present → imaging recommended.
Inputs
Emergency
Apply the Canadian CT Head Rule to determine if CT is needed after minor head injury (GCS 13–15). Achieves 98.4% sensitivity for neurosurgically significant injuries, safely reducing CT use.
Formula
Decision rule with 4 high-risk and 2 medium-risk criteria. Any positive criterion = CT recommended.
Inputs