sPESI Calculator (Simplified Pulmonary Embolism Severity Index)

x402

sPESI Calculator (Simplified Pulmonary Embolism Severity Index) is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Computes the sPESI score (0–6) for a patient with confirmed acute pulmonary embolism, classifying them as low risk (score 0) or high risk (score ≥1) per Jiménez 2010.

Price / call$0.005

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How this service works

sPESI (simplified Pulmonary Embolism Severity Index) from Jiménez 2010: 1 point each for age >80, cancer, chronic cardiopulmonary disease (one combined item), heart rate ≥110, systolic BP <100 mm Hg, and SpO2 <90%; max 6. Score 0 is low risk; ≥1 is high risk. Only for already diagnosed acute PE as in the paper. Not a diagnosis, not an outpatient-treatment protocol, and not original PESI classes.

Output

Returns an integer sPESI score from 0 to 6 reflecting the sum of applicable risk points, a binary risk classification (low risk if score is 0, high risk if score is ≥1), and the individual point contributions for each of the six criteria (age >80, cancer, chronic cardiopulmonary disease, HR ≥110, systolic BP <100, SpO2 <90%).

Example use cases

ED risk stratification for PE disposition

“I have a confirmed PE patient in the ED: age 76, no cancer, chronic heart failure present, heart rate 112, systolic BP 92 mmHg, SpO2 91%. Can you run the sPESI score and tell me if they're low or high risk?”

Automated PE severity scoring in EHR workflow

“For our PE protocol, calculate the sPESI for a 55-year-old patient with no cancer, no chronic cardiopulmonary disease, heart rate 108 bpm, systolic BP 118 mmHg, and SpO2 94%.”

Clinical audit of PE risk scores

“We're reviewing a PE case — patient was 84, had active cancer and chronic lung disease, heart rate was 120, BP systolic 88, SpO2 was 85%. What would the sPESI have been?”

Technical details

Endpoint

GEThttps://api.magentlab.com/api/calc/spesi

When to prefer

Use this endpoint when you need a deterministic, published sPESI calculation per Jiménez 2010 for a patient with already-confirmed acute PE. Prefer it over manual rule application when building clinical decision-support pipelines, EHR integrations, or audit tools that require reproducible, citable risk stratification. Do not use it for PE diagnosis, outpatient treatment decisions, or when the original multi-class PESI score is required.

Side effects

Missing required query parameters (age, cancer, chronic_cardiopulmonary_disease, heart_rate_bpm, systolic_mm_hg, spo2_percent) returns a 400 error
Age outside 18–120 range or heart rate outside 30–220 range returns a validation error
SpO2 outside 50–100 or systolic BP outside 50–250 returns a validation error
Non-integer age or heart_rate_bpm values may fail schema validation
Payment not provided or invalid x402 payment header returns 402 Payment Required

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "path": "/api/calc/spesi",
    "count": 2,
    "items": [
      {
        "score": 0,
        "formula": "spesi",
        "citation": {
          "id": "jimenez-2010",
          "doi": "10.1001/archinternmed.2010.199",
          "title": "Simplification of the pulmonary embolism severity index for prognostication in patients with acute symptomatic pulmonary embolism",
          "source": "Arch Intern Med. 2010;170(15):1383-1389",
          "authors": "Jiménez D, Aujesky D, Moores L, et al."
        },
        "age_years": 70,
        "max_score": 6,
        "components": [
          {
            "value": 70,
            "factor": "age_gt_80",
            "points": 0,
            "present": false
          },
          {
            "factor": "cancer",
            "points": 0,
            "present": false
          },
          {
            "factor": "chronic_cardiopulmonary_disease",
            "points": 0,
            "present": false
          },
          {
            "value": 80,
            "factor": "heart_rate_ge_110",
            "points": 0,
            "present": false
          },
          {
            "value": 120,
            "factor": "systolic_mm_hg_lt_100",
            "points": 0,
            "present": false
          },
          {
            "value": 96,
            "factor": "spo2_lt_90",
            "points": 0,
            "present": false
          }
        ],
        "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.",
        "spesi_risk": "low",
        "formula_expression": "sPESI = age_gt_80 + cancer + chronic_cardiopulmonary_disease + heart_rate_ge_110 + systolic_mm_hg_lt_100 + spo2_lt_90; each 1 if present; max 6; 0 low, >=1 high"
      },
      {
        "score": 0,
        "formula": "spesi",
        "citation": {
          "id": "jimenez-2010",
          "doi": "10.1001/archinternmed.2010.199",
          "title": "Simplification of the pulmonary embolism severity index for prognostication in patients with acute symptomatic pulmonary embolism",
          "source": "Arch Intern Med. 2010;170(15):1383-1389",
          "authors": "Jiménez D, Aujesky D, Moores L, et al."
        },
        "age_years": 70,
        "max_score": 6,
        "components": [
          {
            "value": 70,
            "factor": "age_gt_80",
            "points": 0,
            "present": false
          },
          {
            "factor": "cancer",
            "points": 0,
            "present": false
          },
          {
            "factor": "chronic_cardiopulmonary_disease",
            "points": 0,
            "present": false
          },
          {
            "value": 80,
            "factor": "heart_rate_ge_110",
            "points": 0,
            "present": false
          },
          {
            "value": 120,
            "factor": "systolic_mm_hg_lt_100",
            "points": 0,
            "present": false
          },
          {
            "value": 96,
            "factor": "spo2_lt_90",
            "points": 0,
            "present": false
          }
        ],
        "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.",
        "spesi_risk": "low",
        "formula_expression": "sPESI = age_gt_80 + cancer + chronic_cardiopulmonary_disease + heart_rate_ge_110 + systolic_mm_hg_lt_100 + spo2_lt_90; each 1 if present; max 6; 0 low, >=1 high"
      }
    ]
  }
}

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How this service works

Output

Example use cases

ED risk stratification for PE disposition

Automated PE severity scoring in EHR workflow

“For our PE protocol, calculate the sPESI for a 55-year-old patient with no cancer, no chronic cardiopulmonary disease, heart rate 108 bpm, systolic BP 118 mmHg, and SpO2 94%.”

Clinical audit of PE risk scores

“We're reviewing a PE case — patient was 84, had active cancer and chronic lung disease, heart rate was 120, BP systolic 88, SpO2 was 85%. What would the sPESI have been?”

Technical details

Endpoint

GEThttps://api.magentlab.com/api/calc/spesi

When to prefer

Side effects

Missing required query parameters (age, cancer, chronic_cardiopulmonary_disease, heart_rate_bpm, systolic_mm_hg, spo2_percent) returns a 400 error
Age outside 18–120 range or heart rate outside 30–220 range returns a validation error
SpO2 outside 50–100 or systolic BP outside 50–250 returns a validation error
Non-integer age or heart_rate_bpm values may fail schema validation
Payment not provided or invalid x402 payment header returns 402 Payment Required

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "path": "/api/calc/spesi",
    "count": 2,
    "items": [
      {
        "score": 0,
        "formula": "spesi",
        "citation": {
          "id": "jimenez-2010",
          "doi": "10.1001/archinternmed.2010.199",
          "title": "Simplification of the pulmonary embolism severity index for prognostication in patients with acute symptomatic pulmonary embolism",
          "source": "Arch Intern Med. 2010;170(15):1383-1389",
          "authors": "Jiménez D, Aujesky D, Moores L, et al."
        },
        "age_years": 70,
        "max_score": 6,
        "components": [
          {
            "value": 70,
            "factor": "age_gt_80",
            "points": 0,
            "present": false
          },
          {
            "factor": "cancer",
            "points": 0,
            "present": false
          },
          {
            "factor": "chronic_cardiopulmonary_disease",
            "points": 0,
            "present": false
          },
          {
            "value": 80,
            "factor": "heart_rate_ge_110",
            "points": 0,
            "present": false
          },
          {
            "value": 120,
            "factor": "systolic_mm_hg_lt_100",
            "points": 0,
            "present": false
          },
          {
            "value": 96,
            "factor": "spo2_lt_90",
            "points": 0,
            "present": false
          }
        ],
        "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.",
        "spesi_risk": "low",
        "formula_expression": "sPESI = age_gt_80 + cancer + chronic_cardiopulmonary_disease + heart_rate_ge_110 + systolic_mm_hg_lt_100 + spo2_lt_90; each 1 if present; max 6; 0 low, >=1 high"
      },
      {
        "score": 0,
        "formula": "spesi",
        "citation": {
          "id": "jimenez-2010",
          "doi": "10.1001/archinternmed.2010.199",
          "title": "Simplification of the pulmonary embolism severity index for prognostication in patients with acute symptomatic pulmonary embolism",
          "source": "Arch Intern Med. 2010;170(15):1383-1389",
          "authors": "Jiménez D, Aujesky D, Moores L, et al."
        },
        "age_years": 70,
        "max_score": 6,
        "components": [
          {
            "value": 70,
            "factor": "age_gt_80",
            "points": 0,
            "present": false
          },
          {
            "factor": "cancer",
            "points": 0,
            "present": false
          },
          {
            "factor": "chronic_cardiopulmonary_disease",
            "points": 0,
            "present": false
          },
          {
            "value": 80,
            "factor": "heart_rate_ge_110",
            "points": 0,
            "present": false
          },
          {
            "value": 120,
            "factor": "systolic_mm_hg_lt_100",
            "points": 0,
            "present": false
          },
          {
            "value": 96,
            "factor": "spo2_lt_90",
            "points": 0,
            "present": false
          }
        ],
        "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.",
        "spesi_risk": "low",
        "formula_expression": "sPESI = age_gt_80 + cancer + chronic_cardiopulmonary_disease + heart_rate_ge_110 + systolic_mm_hg_lt_100 + spo2_lt_90; each 1 if present; max 6; 0 low, >=1 high"
      }
    ]
  }
}