NEXUS Chest (Rodriguez 2011)
NEXUS Chest (Rodriguez 2011). Chest radiography is not indicated by this instrument only when all seven caller-assigned findings are absent: chest pain, distracting injury, chest-wall tenderness, intoxication, age >60, rapid deceleration, and altered mental status. Any one present means chest x-ray is indicated. Not a diagnosis, not Hoffman 2000 NEXUS C-spine, and not a NEXUS Chest CT instrument. Derivation enrolled blunt trauma age >14. magent does not examine the patient.
Asked 1.4x its listed price for its own exampleour last check, 2026-09-28
1 of 1checks answered this week
430 msmedian answer time
$0.005listed price per call
$0.007price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://api.magentlab.com/api/calc/nexus_chest
| Category | Everything else |
|---|---|
| Provider host | api.magentlab.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 0 from 0 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-28 | valid payment request | 402 | $0.007 | 430 ms |
Example input (from the provider)
{
"body": {
"items": [
{
"age_gt_60": false,
"altered_mental_status": false,
"chest_pain": false,
"chest_wall_tenderness": false,
"distracting_injury": false,
"intoxication": false,
"rapid_deceleration": false
},
{
"age_gt_60": false,
"altered_mental_status": false,
"chest_pain": false,
"chest_wall_tenderness": false,
"distracting_injury": false,
"intoxication": false,
"rapid_deceleration": false
}
]
},
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"items": {
"items": {
"properties": {
"age_gt_60": {
"description": "Age greater than 60 years as assigned by the caller (a NEXUS Chest criterion, not a numeric age input). true means age >60 and the low-risk criterion fails. true or false. magent does not take numeric age.",
"type": "boolean"
},
"altered_mental_status": {
"description": "Altered alertness or mental status. true means altered mental status is present and the low-risk criterion fails. true or false as assigned by the caller. magent does not examine the patient.",
"type": "boolean"
},
"chest_pain": {
"description": "Chest pain. true means chest pain is present and the low-risk criterion fails. true or false as assigned by the caller. magent does not examine the patient.",
"type": "boolean"
},
"chest_wall_tenderness": {
"description": "Tenderness to chest-wall palpation. true means tenderness is present and the low-risk criterion fails. true or false as assigned by the caller. magent does not palpate the chest.",
"type": "boolean"
},
"distracting_injury": {
"description": "Painful, distracting injury. true means a distracting injury is present and the low-risk criterion fails. true or false as assigned by the caller.",
"type": "boolean"
},
"intoxication": {
"description": "Intoxication. true means intoxicated and the low-risk criterion fails. true or false as assigned by the caller.",
"type": "boolean"
},
"rapid_deceleration": {
"description": "Rapid deceleration mechanism (paper: fall from >20 feet or motor vehicle crash >40 mph) as assigned by the caller. true means the mechanism is present and the low-risk criterion fails. true or false. magent does not classify mechanism.",
"type": "boolean"
}
},
"required": [
"chest_pain",
"distracting_injury",
"chest_wall_tenderness",
"intoxication",
"age_gt_60",
"rapid_deceleration",
"altered_mental_status"
],
"type": "object"
},
"maxItems": 25,
"minItems": 1,
"type": "array"
}
},
"required": [
"items"
],
"type": "object"
},
"headers": {
"additionalProperties": {
"type": "string"
},
"type": "object"
},
"method": {
"const": "POST",
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}