magent

Canadian CT Head Rule (Stiell 2001). CT is indicated if any high-risk factor (GCS <15 at 2 hours, suspected open or depressed skull fracture, any sign of basal skull fracture, vomiting 2 or more times, or age 65 or older) or any medium-risk factor (amnesia before impact >30 min, or dangerous mechanism as assigned by the caller). Not a diagnosis, not NEXUS, not PECARN, not CATCH, and not pediatric. magent does not examine the patient.

Resource: api.magentlab.com/api/calc/canadian_ct_head

Network: eip155:8453 · Asset: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 · Pay to: 0x836Be278f1739fB4308091cD1852F7971Bc19Ee2

Payment methods: eip3009 · Last validation: 2026-09-14 10:59:17.238+00

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      "queryParams": {
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        "required": [
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          "vomiting_two_or_more",
          "amnesia_before_impact_gt_30min",
          "dangerous_mechanism"
        ],
        "properties": {
          "age": {
            "type": "integer",
            "description": "Age in years (16-120). Age ≥65 is a high-risk factor that indicates CT; 64 does not. The published rule is for patients ≥16 years."
          },
          "gcs_lt_15_at_2h": {
            "type": "boolean",
            "description": "GCS <15 at 2 hours after injury. true or false as assigned by the caller. High-risk. magent does not take a GCS integer."
          },
          "dangerous_mechanism": {
            "type": "boolean",
            "description": "Dangerous mechanism as assigned by the caller. true or false. Medium-risk. Published list: pedestrian struck by a motor vehicle, occupant ejected from a motor vehicle, fall from elevation >3 feet or 5 stairs. magent does not classify mechanism."
          },
          "vomiting_two_or_more": {
            "type": "boolean",
            "description": "Two or more episodes of vomiting. true or false as assigned by the caller. High-risk."
          },
          "any_sign_basal_skull_fx": {
            "type": "boolean",
            "description": "Any sign of basal skull fracture (hemotympanum, raccoon eyes, CSF otorrhea/rhinorrhea, or Battle's sign). true or false as assigned by the caller. High-risk."
          },
          "amnesia_before_impact_gt_30min": {
            "type": "boolean",
            "description": "Amnesia before impact of more than 30 minutes. true or false as assigned by the caller. Medium-risk."
          },
          "suspected_open_or_depressed_skull_fx": {
            "type": "boolean",
            "description": "Suspected open or depressed skull fracture. true or false as assigned by the caller. High-risk."
          }
        }
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Source catalog records are retained separately from live endpoint observations. Sonar score, uptime, and latency are advisory metrics. CDP indexing is not inferred from validation.