{ "x402Version": 2, "id": 38967, "slug": "38967", "resource": "https://api.magentlab.com/api/calc/pediatric_nexus_ii", "description": "Pediatric NEXUS II (Gupta 2018). Low-risk iff all seven flags are false: skull fracture, scalp hematoma, neurologic deficit, altered alertness, abnormal behavior, persistent vomiting, and coagulopathy. Age 0-17 is required but is not a criterion; adult NEXUS Head CT age >= 65 is dropped. Not a diagnosis, not a CT order, not Mower 2017 adult NEXUS Head CT, not PECARN, CATCH, or CHALICE, and not Hoffman 2000 NEXUS C-spine. magent does not examine the patient.", "type": "http", "serviceName": "magent", "resourceType": "Agent Service", "accepts": [ { "scheme": "exact", "network": "eip155:8453", "payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2", "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "amount": "5000", "amountUsd": 0.005, "maxTimeoutSeconds": 600 } ], "outputSchema": { "properties": { "example": { "type": "object" }, "type": { "type": "string" } }, "required": [ "type" ], "type": "object" }, "extensions": { "bazaar": { "info": { "iconUrl": "https://api.magentlab.com/favicon.ico", "input": { "body": { "items": [ { "abnormal_behavior": false, "age": 10, "altered_alertness": false, "coagulopathy": false, "neurologic_deficit": false, "persistent_vomiting": false, "scalp_hematoma": false, "skull_fracture": false }, { "abnormal_behavior": false, "age": 10, "altered_alertness": false, "coagulopathy": false, "neurologic_deficit": false, "persistent_vomiting": false, "scalp_hematoma": false, "skull_fracture": false } ] }, "method": "POST", "type": "http" }, "output": { "example": { "count": 2, "items": [ { "age_years": 10, "citation": { "authors": "Gupta M, Mower WR, Rodriguez RM, Hendey GW", "doi": "10.1111/acem.13431", "id": "gupta-2018", "pmid": "29665151", "source": "Acad Emerg Med. 2018;25(7):729-737", "title": "Validation of the Pediatric NEXUS II Head Computed Tomography Decision Instrument for Selective Imaging of Pediatric Patients with Blunt Head Trauma." }, "criteria": [ { "factor": "no_skull_fracture", "met": true }, { "factor": "no_scalp_hematoma", "met": true }, { "factor": "no_neurologic_deficit", "met": true }, { "factor": "no_altered_alertness", "met": true }, { "factor": "no_abnormal_behavior", "met": true }, { "factor": "no_persistent_vomiting", "met": true }, { "factor": "no_coagulopathy", "met": true } ], "disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.", "formula": "pediatric_nexus_ii", "formula_expression": "low_risk iff no skull_fracture and no scalp_hematoma and no neurologic_deficit and no altered_alertness and no abnormal_behavior and no persistent_vomiting and no coagulopathy", "low_risk": true }, { "age_years": 10, "citation": { "authors": "Gupta M, Mower WR, Rodriguez RM, Hendey GW", "doi": "10.1111/acem.13431", "id": "gupta-2018", "pmid": "29665151", "source": "Acad Emerg Med. 2018;25(7):729-737", "title": "Validation of the Pediatric NEXUS II Head Computed Tomography Decision Instrument for Selective Imaging of Pediatric Patients with Blunt Head Trauma." }, "criteria": [ { "factor": "no_skull_fracture", "met": true }, { "factor": "no_scalp_hematoma", "met": true }, { "factor": "no_neurologic_deficit", "met": true }, { "factor": "no_altered_alertness", "met": true }, { "factor": "no_abnormal_behavior", "met": true }, { "factor": "no_persistent_vomiting", "met": true }, { "factor": "no_coagulopathy", "met": true } ], "disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.", "formula": "pediatric_nexus_ii", "formula_expression": "low_risk iff no skull_fracture and no scalp_hematoma and no neurologic_deficit and no altered_alertness and no abnormal_behavior and no persistent_vomiting and no coagulopathy", "low_risk": true } ], "path": "/api/calc/pediatric_nexus_ii" }, "type": "json" } }, "schema": { "$schema": "https://json-schema.org/draft/2020-12/schema", "properties": { "input": { "additionalProperties": false, "properties": { "body": { "additionalProperties": false, "properties": { "items": { "items": { "properties": { "abnormal_behavior": { "description": "Abnormal behavior as assigned by the caller. true means abnormal behavior is present and low_risk is false. true or false. magent does not examine the patient.", "type": "boolean" }, "age": { "description": "Age in years (integer 0-17). Required to match the Gupta 2018 pediatric population but is not a score criterion. Age 18 is rejected. Adult NEXUS Head CT age ≥ 65 is dropped.", "type": "integer" }, "altered_alertness": { "description": "Altered level of alertness as assigned by the caller. true means alertness is altered and low_risk is false. true or false. magent does not assign GCS.", "type": "boolean" }, "coagulopathy": { "description": "Coagulopathy as assigned by the caller. true means coagulopathy is present and low_risk is false. true or false. magent does not interpret a coagulation assay.", "type": "boolean" }, "neurologic_deficit": { "description": "Neurologic deficit (neurosurgical deficits) as assigned by the caller. true means a deficit is present and low_risk is false. true or false. magent does not examine the patient.", "type": "boolean" }, "persistent_vomiting": { "description": "Persistent vomiting as assigned by the caller. true means persistent vomiting is present and low_risk is false. true or false. magent does not take a vomit count.", "type": "boolean" }, "scalp_hematoma": { "description": "Scalp hematoma as assigned by the caller. true means a scalp hematoma is present and low_risk is false. true or false. magent does not examine the scalp.", "type": "boolean" }, "skull_fracture": { "description": "Evidence of skull fracture as assigned by the caller. true means a skull-fracture finding is present and low_risk is false. true or false. magent does not examine the patient or read a radiograph.", "type": "boolean" } }, "required": [ "age", "skull_fracture", "scalp_hematoma", "neurologic_deficit", "altered_alertness", "abnormal_behavior", "persistent_vomiting", "coagulopathy" ], "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" } } }, "tags": [ "pediatric-nexus-ii", "head-ct", "trauma", "emergency", "calculator", "bazaar" ], "sourceHost": "api.magentlab.com", "lastUpdated": "2026-10-13T10:56:50.714Z", "quality": { "calls30d": 5, "uniquePayers30d": 2, "lastCalledAt": "2026-10-13T10:56:50.573Z" }, "metadata": { "serviceName": "magent", "extensions": { "bazaar": { "info": { "iconUrl": "https://api.magentlab.com/favicon.ico", "input": { "body": { "items": [ { "abnormal_behavior": false, "age": 10, "altered_alertness": false, "coagulopathy": false, "neurologic_deficit": false, "persistent_vomiting": false, "scalp_hematoma": false, "skull_fracture": false }, { "abnormal_behavior": false, "age": 10, "altered_alertness": false, "coagulopathy": false, "neurologic_deficit": false, "persistent_vomiting": false, "scalp_hematoma": false, "skull_fracture": false } ] }, "method": "POST", "type": "http" }, "output": { "example": { "count": 2, "items": [ { "age_years": 10, "citation": { "authors": "Gupta M, Mower WR, Rodriguez RM, Hendey GW", "doi": "10.1111/acem.13431", "id": "gupta-2018", "pmid": "29665151", "source": "Acad Emerg Med. 2018;25(7):729-737", "title": "Validation of the Pediatric NEXUS II Head Computed Tomography Decision Instrument for Selective Imaging of Pediatric Patients with Blunt Head Trauma." }, "criteria": [ { "factor": "no_skull_fracture", "met": true }, { "factor": "no_scalp_hematoma", "met": true }, { "factor": "no_neurologic_deficit", "met": true }, { "factor": "no_altered_alertness", "met": true }, { "factor": "no_abnormal_behavior", "met": true }, { "factor": "no_persistent_vomiting", "met": true }, { "factor": "no_coagulopathy", "met": true } ], "disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.", "formula": "pediatric_nexus_ii", "formula_expression": "low_risk iff no skull_fracture and no scalp_hematoma and no neurologic_deficit and no altered_alertness and no abnormal_behavior and no persistent_vomiting and no coagulopathy", "low_risk": true }, { "age_years": 10, "citation": { "authors": "Gupta M, Mower WR, Rodriguez RM, Hendey GW", "doi": "10.1111/acem.13431", "id": "gupta-2018", "pmid": "29665151", "source": "Acad Emerg Med. 2018;25(7):729-737", "title": "Validation of the Pediatric NEXUS II Head Computed Tomography Decision Instrument for Selective Imaging of Pediatric Patients with Blunt Head Trauma." }, "criteria": [ { "factor": "no_skull_fracture", "met": true }, { "factor": "no_scalp_hematoma", "met": true }, { "factor": "no_neurologic_deficit", "met": true }, { "factor": "no_altered_alertness", "met": true }, { "factor": "no_abnormal_behavior", "met": true }, { "factor": "no_persistent_vomiting", "met": true }, { "factor": "no_coagulopathy", "met": true } ], "disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.", "formula": "pediatric_nexus_ii", "formula_expression": "low_risk iff no skull_fracture and no scalp_hematoma and no neurologic_deficit and no altered_alertness and no abnormal_behavior and no persistent_vomiting and no coagulopathy", "low_risk": true } ], "path": "/api/calc/pediatric_nexus_ii" }, "type": "json" } }, "schema": { "$schema": "https://json-schema.org/draft/2020-12/schema", "properties": { "input": { "additionalProperties": false, "properties": { "body": { "additionalProperties": false, "properties": { "items": { "items": { "properties": { "abnormal_behavior": { "description": "Abnormal behavior as assigned by the caller. true means abnormal behavior is present and low_risk is false. true or false. magent does not examine the patient.", "type": "boolean" }, "age": { "description": "Age in years (integer 0-17). Required to match the Gupta 2018 pediatric population but is not a score criterion. Age 18 is rejected. Adult NEXUS Head CT age ≥ 65 is dropped.", "type": "integer" }, "altered_alertness": { "description": "Altered level of alertness as assigned by the caller. true means alertness is altered and low_risk is false. true or false. magent does not assign GCS.", "type": "boolean" }, "coagulopathy": { "description": "Coagulopathy as assigned by the caller. true means coagulopathy is present and low_risk is false. true or false. magent does not interpret a coagulation assay.", "type": "boolean" }, "neurologic_deficit": { "description": "Neurologic deficit (neurosurgical deficits) as assigned by the caller. true means a deficit is present and low_risk is false. true or false. magent does not examine the patient.", "type": "boolean" }, "persistent_vomiting": { "description": "Persistent vomiting as assigned by the caller. true means persistent vomiting is present and low_risk is false. true or false. magent does not take a vomit count.", "type": "boolean" }, "scalp_hematoma": { "description": "Scalp hematoma as assigned by the caller. true means a scalp hematoma is present and low_risk is false. true or false. magent does not examine the scalp.", "type": "boolean" }, "skull_fracture": { "description": "Evidence of skull fracture as assigned by the caller. true means a skull-fracture finding is present and low_risk is false. true or false. magent does not examine the patient or read a radiograph.", "type": "boolean" } }, "required": [ "age", "skull_fracture", "scalp_hematoma", "neurologic_deficit", "altered_alertness", "abnormal_behavior", "persistent_vomiting", "coagulopathy" ], "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" } } } }, "liveness": { "reliability": null }, "verified": false, "featured": false, "provider": { "host": "api.magentlab.com", "manifest_name": "api.magentlab.com", "source": "cdp-mirror", "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources", "submitted_at": "2026-10-14T01:15:01.050Z" }, "exampleResponse": { "example": {}, "type": "string" } }