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

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

Our checks, last 30 days

Example input (from the provider)

{
  "body": {
    "items": [
      {
        "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
      },
      {
        "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
      }
    ]
  },
  "method": "POST",
  "type": "http"
}

Promised output schema (from the provider)

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "body": {
          "additionalProperties": false,
          "properties": {
            "items": {
              "items": {
                "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",
    

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