Smits 2007 CHIP rule (adults ≥16, GCS 13-15)

Smits 2007 CHIP rule (adults ≥16, GCS 13-15). CT if ≥1 major (pedestrian/cyclist vs vehicle, ejected, vomiting, PTA ≥4 h, skull-fracture signs, GCS <15, GCS drop ≥2 at 1 h, anticoagulants, posttraumatic seizure, age ≥60) or ≥2 minor (fall from elevation, persistent anterograde amnesia, PTA 2 to <4 h, skull contusion, neurologic deficit, LOC, GCS drop of 1 at 1 h, age 40-60). Not a diagnosis; not Canadian CT Head, NEXUS, PECARN, or 2022 CHIP. magent does not examine the patient.

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Endpoint

GET https://api.magentlab.com/api/calc/chip

Our checks, last 30 days

Example input (from the provider)

{
  "method": "GET",
  "queryParams": {
    "age": 30,
    "anticoagulant_therapy": false,
    "clinical_signs_skull_fracture": false,
    "ejected_from_vehicle": false,
    "fall_from_any_elevation": false,
    "gcs": 15,
    "gcs_deterioration_1": false,
    "gcs_deterioration_ge_2": false,
    "loss_of_consciousness": false,
    "neurologic_deficit": false,
    "pedestrian_or_cyclist_vs_vehicle": false,
    "persistent_anterograde_amnesia": false,
    "posttraumatic_seizure": false,
    "pta_2_to_lt_4h": false,
    "pta_ge_4h": false,
    "skull_contusion": false,
    "vomiting": false
  },
  "type": "http"
}

Promised output schema (from the provider)

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "headers": {
          "additionalProperties": {
            "type": "string"
          },
          "type": "object"
        },
        "method": {
          "enum": [
            "GET",
            "HEAD",
            "DELETE"
          ],
          "type": "string"
        },
        "queryParams": {
          "properties": {
            "age": {
              "description": "Age in years (integer 16-120). Age \u226560 is a major criterion. Age 40-59 is the 40-60 y minor band; 39 is neither. The published rule is for patients \u226516 years.",
              "type": "integer"
            },
            "anticoagulant_therapy": {
              "description": "Use of anticoagulant therapy (Smits 2007 major). true or false as assigned by the caller. This is the 2007 simple rule, not the 2022 CHIP update. magent does not interpret a coagulation assay.",
              "type": "boolean"
            },
            "clinical_signs_skull_fracture": {
              "description": "Clinical signs of skull fracture (Smits 2007 major): any injury that suggests a skull fracture, such as palpable discontinuity of the skull, leakage of cerebrospinal fluid, raccoon-eye bruising, and bleeding from the ear, as assigned by the caller. true or false. magent does not examine the patient.",
              "type": "boolean"
            },
            "ejected_from_vehicle": {
              "description": "Ejected from vehicle (Smits 2007 major). true or false as assigned by the caller. magent does not classify mechanism.",
              "type": "boolean"
            },
            "fall_from_any_elevation": {
              "description": "Fall from any elevation (Smits 2007 minor). true or false as assigned by the caller. magent does not classify mechanism.",
              "type": "boolean"
            },
            "gcs": {
              "description": "Glasgow Coma Scale integer 13-15 as published. GCS 13 or 14 (GCS <15) is a major criterion; 15 is not. magent does not assign GCS from an exam.",
              "type": "integer"
            },
            "gcs_deterioration_1": {
              "description": "GCS deterioration of 1 point 1 hour after presentation (Smits 2007 minor). true or false as assigned by the caller. Mutually exclusive with gcs_deterioration_ge_2. magent does not assign GCS change.",
              "type": "boolean"
            },
            "gcs_deterioration_ge_2": {
              "description": "GCS deterioration \u22652 points 1 hour after presentation (Smits 2007 major). true or false as assigned by the caller. Mutually exclusive with gcs_deterioration_1. magent does not assign GCS change.",
              "type": "boolean"
            },
            "loss_of_consciousness": {
              "description": "Loss of consciousness (Smits 2007 minor). true or false as assigned by the caller. magent does not take a history.",
              "type": "boolean"
            },
            "neurologic_deficit": {
              "description": "Neurologic deficit (Smits 2007 minor). true or false as assigned by the caller. magent does not examine the patient.",
              "type": "boolean"
            },
            "pedestrian_or_cyclist_vs_vehicle": {
              "description": "Pedestrian or cyclist versus vehicle (Smits 2007 major). true or false as assigned by the caller. magent does not classify mechanism.",
              "type": "boolean"
            },
            "persistent_anterograde_amnesia": {
              "description": "Persistent anterograde amnesia, any deficit of short-term memory (Smits 2007 minor). true or false as assigned by the caller. magent does not test memory.",
              "type": "boolean"
            },
            "posttraumatic_seizure": {
              "description": "Posttraumatic seizure (Smits 2007 major). true or false as assigned by the caller. magent does not witness a seizure.",
              "type": "boolean"
            },
            "pta_2_to_lt_4h": {
              "description": "Posttraumatic amnesia of 2 to <4 hours (Smits 2007 minor). true or false as assigned by the caller. Mutually exclusive with pta_ge_4h. magent does not measure amnesia duration.",
              "type": "boolean"
            },
            "pta_ge_4h": {
              "description": "Posttraumatic amnesia \u22654 hours (Smits 2007 major). true or false as assigned by the caller. Mutually exclusive with pta_2_to_lt_4h. magent does not measure amnesia duration.",
              "type": "boolean"
            },
            "skull_contusion": {
              "description": "Contusion of the skull (Smits 2007 minor). true or false as assigned by the caller. magent does not examine the scalp.",
              "type": "boolean"
            },
            "vomiting": {
              "description": "Vomiting (Smits 2007 major). true or false as assigned by the caller. magent does not take a vomit count.",
              "type": "boolean"
            }
          },
          "required": [
            "age",
            "gcs",
            "pedestrian_or_cyclist_vs_vehicle",
            "ejected_from_vehicle",
            "vomiting",
            "pta_ge_4h",
            "clinical_signs_skull_fracture",
            "gcs_deterioration_ge_2",
            "anticoagulant_therapy",
            "posttraumatic_seizure",
            "fall_from_any_elevation",
            "persistent_anterograde_amnesia",
            "pta_2_to_lt_4h",
            "skull_contusion",
            "neurologic_deficit",
            "loss_of_consciousness",
            "gcs_deterioration_1"
          ],
          "type": "object"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method"
      ],
      "type": "object"
    },
    "output": {
      "properties":

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