Geneva VTE prophylaxis score

Geneva prophylaxis score

Compute the Chopard 2006 Geneva risk score for VTE thromboprophylaxis in acutely ill medical inpatients from age and caller-assigned findings.

LIVE $0.005 USDC GET /api/calc/geneva_prophylaxis

Markdown: /docs/geneva-prophylaxis.md · Canonical: https://magentlab.com/docs/geneva-prophylaxis

Not a medical device. Not a diagnosis, dose, or listing recommendation.

What it computes

Compute the Chopard 2006 Geneva risk score for VTE thromboprophylaxis in acutely ill medical inpatients from age and caller-assigned findings.

When to use

When an agent needs the published Chopard 2006 Geneva prophylaxis point total (not the Revised Geneva PE diagnostic score, not Padua) for an acutely ill medical inpatient.

When not to use

Not a medical device and not a diagnosis of VTE. magent does not examine the patient; every flag is caller-assigned.
Chopard 2006 Geneva prophylaxis score for acutely ill medical inpatients only. Not the Revised Geneva PE diagnostic score (Le Gal 2006). Not Padua.
Obesity is a caller-applied BMI >30 flag; magent does not take height or weight.
Immobilization is a caller-applied flag (walk <30 min/day for ≥3 days); magent does not observe walking time.
Does not return Padua points, PE probabilities, or a prophylaxis regimen. risk_group high means published score ≥3 (prophylaxis indicated in the letter), not an order.

Formula

geneva_prophylaxis = cardiac_failure (2) + respiratory_failure (2) + recent_stroke (2) + recent_myocardial_infarction (2) + acute_infectious_disease (2) + acute_rheumatic_disease (2) + malignancy (2) + myeloproliferative_syndrome (2) + nephrotic_syndrome (2) + history_of_vte (2) + known_hypercoagulable_state (2) + immobilization_ge_3d (1) + recent_travel_gt_6h (1) + age>60 (1) + obesity_bmi_gt_30 (1) + chronic_venous_insufficiency (1) + pregnancy (1) + hormonal_therapy (1) + dehydration (1); Chopard 2006 letter table; max 30; <3 low, >=3 high (prophylaxis indicated)

Citation

Title: Identifying acutely ill medical patients requiring thromboprophylaxis
Authors: Chopard P, Spirk D, Bounameaux H
Source: J Thromb Haemost. 2006;4(4):915-916
DOI: 10.1111/j.1538-7836.2006.01818.x

Worked example

All items absent

Given: acute_infectious_disease=falseacute_rheumatic_disease=falseage=50cardiac_failure=falsechronic_venous_insufficiency=falsedehydration=falsehistory_of_vte=falsehormonal_therapy=falseimmobilization_ge_3d=falseknown_hypercoagulable_state=falsemalignancy=falsemyeloproliferative_syndrome=falsenephrotic_syndrome=falseobesity_bmi_gt_30=falsepregnancy=falserecent_myocardial_infarction=falserecent_stroke=falserecent_travel_gt_6h=falserespiratory_failure=false

Age 50 is not >60 → 0; all eighteen flags false → 0
Score = 0 (max 30); risk_group low

Cardiac failure plus immobilization is high

Given: acute_infectious_disease=falseacute_rheumatic_disease=falseage=50cardiac_failure=truechronic_venous_insufficiency=falsedehydration=falsehistory_of_vte=falsehormonal_therapy=falseimmobilization_ge_3d=trueknown_hypercoagulable_state=falsemalignancy=falsemyeloproliferative_syndrome=falsenephrotic_syndrome=falseobesity_bmi_gt_30=falsepregnancy=falserecent_myocardial_infarction=falserecent_stroke=falserecent_travel_gt_6h=falserespiratory_failure=false

cardiac_failure → 2; immobilization_ge_3d → 1
Score = 3 (max 30); risk_group high (prophylaxis indicated ≥3)

Also searched as

Geneva prophylaxis score
Chopard 2006 Geneva score
Geneva thromboprophylaxis score
Chopard VTE prophylaxis
acutely ill medical VTE score
Geneva medical inpatient VTE
Chopard Geneva risk score

Try

Opens the live endpoint. Unpaid browser requests show the paywall; agents should send Accept: application/json.

/api/calc/geneva_prophylaxis?age=50&cardiac_failure=false&respiratory_failure=false&recent_stroke=false&recent_myocardial_infarction=false&acute_infectious_disease=false&acute_rheumatic_disease=false&malignancy=false&myeloproliferative_syndrome=false&nephrotic_syndrome=false&history_of_vte=false&known_hypercoagulable_state=false&immobilization_ge_3d=false&recent_travel_gt_6h=false&obesity_bmi_gt_30=false&chronic_venous_insufficiency=false&pregnancy=false&hormonal_therapy=false&dehydration=false

Full URL: https://api.magentlab.com/api/calc/geneva_prophylaxis?age=50&cardiac_failure=false&respiratory_failure=false&recent_stroke=false&recent_myocardial_infarction=false&acute_infectious_disease=false&acute_rheumatic_disease=false&malignancy=false&myeloproliferative_syndrome=false&nephrotic_syndrome=false&history_of_vte=false&known_hypercoagulable_state=false&immobilization_ge_3d=false&recent_travel_gt_6h=false&obesity_bmi_gt_30=false&chronic_venous_insufficiency=false&pregnancy=false&hormonal_therapy=false&dehydration=false

Call

Expect HTTP 402 until you retry with PAYMENT-SIGNATURE. Incomplete query params return HTTP 400 before any quote or charge.

curl -i -H "Accept: application/json" "https://api.magentlab.com/api/calc/geneva_prophylaxis?age=50&cardiac_failure=false&respiratory_failure=false&recent_stroke=false&recent_myocardial_infarction=false&acute_infectious_disease=false&acute_rheumatic_disease=false&malignancy=false&myeloproliferative_syndrome=false&nephrotic_syndrome=false&history_of_vte=false&known_hypercoagulable_state=false&immobilization_ge_3d=false&recent_travel_gt_6h=false&obesity_bmi_gt_30=false&chronic_venous_insufficiency=false&pregnancy=false&hormonal_therapy=false&dehydration=false"

Parameters

Name	Type	Required	Description
`age`	integer	required	Age in years (18-120). Age >60 scores 1 (Chopard 2006). Age 60 is the ≤60 arm and scores 0.
`cardiac_failure`	boolean	required	Cardiac failure as assigned by the caller (Chopard 2006 Geneva prophylaxis table). true scores 2. magent does not examine the patient.
`respiratory_failure`	boolean	required	Respiratory failure as assigned by the caller (Chopard 2006). true scores 2. magent does not examine the patient.
`recent_stroke`	boolean	required	Recent stroke as assigned by the caller (Chopard 2006). true scores 2. magent does not diagnose stroke.
`recent_myocardial_infarction`	boolean	required	Recent myocardial infarction as assigned by the caller (Chopard 2006). true scores 2. magent does not diagnose myocardial infarction.
`acute_infectious_disease`	boolean	required	Acute infectious disease including sepsis as assigned by the caller (Chopard 2006). true scores 2. magent does not diagnose infection.
`acute_rheumatic_disease`	boolean	required	Acute rheumatic disease as assigned by the caller (Chopard 2006). true scores 2. magent does not diagnose rheumatic disease.
`malignancy`	boolean	required	Malignancy as assigned by the caller (Chopard 2006). true scores 2. magent does not diagnose cancer.
`myeloproliferative_syndrome`	boolean	required	Myeloproliferative syndrome as assigned by the caller (Chopard 2006). true scores 2. magent does not diagnose a myeloproliferative neoplasm.
`nephrotic_syndrome`	boolean	required	Nephrotic syndrome as assigned by the caller (Chopard 2006). true scores 2. magent does not diagnose nephrotic syndrome.
`history_of_vte`	boolean	required	History of VTE as assigned by the caller (Chopard 2006). true scores 2. magent does not diagnose VTE.
`known_hypercoagulable_state`	boolean	required	Known hypercoagulable state as assigned by the caller (Chopard 2006). true scores 2. magent does not interpret a thrombophilia panel.
`immobilization_ge_3d`	boolean	required	Immobilization as assigned by the caller (walk <30 min/day for ≥3 days, Chopard 2006). true scores 1. magent does not observe walking time.
`recent_travel_gt_6h`	boolean	required	Recent travel >6 hours as assigned by the caller (Chopard 2006). true scores 1.
`obesity_bmi_gt_30`	boolean	required	Obesity as assigned by the caller (BMI >30, Chopard 2006). true scores 1. magent does not take height or weight.
`chronic_venous_insufficiency`	boolean	required	Chronic venous insufficiency as assigned by the caller (Chopard 2006). true scores 1. magent does not examine the patient.
`pregnancy`	boolean	required	Pregnancy as assigned by the caller (Chopard 2006). true scores 1. magent does not confirm pregnancy.
`hormonal_therapy`	boolean	required	Hormonal therapy as assigned by the caller (Chopard 2006). true scores 1.
`dehydration`	boolean	required	Dehydration as assigned by the caller (Chopard 2006). true scores 1. magent does not assay volume status.

Bulk (POST)

POST the same path with a JSON items array. The first item is the GET unit; each additional item is $0.002. Invalid items return HTTP 400 before settlement.

POST /api/calc/geneva_prophylaxis Max 25 unit_amount + extra_item_amount * (n - 1) extra $0.002 PREVIEW

1 to 25 items. Each item uses the same keys as the GET query parameters.
POST of 1 item costs the same as GET. Lists longer than 25: chunk into multiple POSTs. Extra items still execute; do not pad dummy rows.
The first invalid item fails the whole request (index in the 400 JSON). You are not charged.
HTTP 200 is {count, path, items}. Each items[i] is the GET 200 body for that row.
Catalog misses (empty matches, found=false) stay paid 200s inside that slot.
x402 resource URL is this path plus n and body_sha256. Browsers that prefer text/html get the same paywall as GET; Pay retries POST with the same items.

Example request (fixture)

{
  "items": [
    {
      "acute_infectious_disease": "false",
      "acute_rheumatic_disease": "false",
      "age": "50",
      "cardiac_failure": "false",
      "chronic_venous_insufficiency": "false",
      "dehydration": "false",
      "history_of_vte": "false",
      "hormonal_therapy": "false",
      "immobilization_ge_3d": "false",
      "known_hypercoagulable_state": "false",
      "malignancy": "false",
      "myeloproliferative_syndrome": "false",
      "nephrotic_syndrome": "false",
      "obesity_bmi_gt_30": "false",
      "pregnancy": "false",
      "recent_myocardial_infarction": "false",
      "recent_stroke": "false",
      "recent_travel_gt_6h": "false",
      "respiratory_failure": "false"
    },
    {
      "acute_infectious_disease": "false",
      "acute_rheumatic_disease": "false",
      "age": "50",
      "cardiac_failure": "false",
      "chronic_venous_insufficiency": "false",
      "dehydration": "false",
      "history_of_vte": "false",
      "hormonal_therapy": "false",
      "immobilization_ge_3d": "false",
      "known_hypercoagulable_state": "false",
      "malignancy": "false",
      "myeloproliferative_syndrome": "false",
      "nephrotic_syndrome": "false",
      "obesity_bmi_gt_30": "false",
      "pregnancy": "false",
      "recent_myocardial_infarction": "false",
      "recent_stroke": "false",
      "recent_travel_gt_6h": "false",
      "respiratory_failure": "false"
    }
  ]
}

Open bulk paywall →

Opens a two-item fixture on the API host. Unpaid browsers get the same MetaMask paywall as GET; Pay retries POST with those items.

Example 200 (fixture)

{
  "count": 2,
  "path": "/api/calc/geneva_prophylaxis",
  "items": [
    {
      "components": [
        {
          "factor": "cardiac_failure",
          "points": 0,
          "present": false
        },
        {
          "factor": "respiratory_failure",
          "points": 0,
          "present": false
        },
        {
          "factor": "recent_stroke",
          "points": 0,
          "present": false
        },
        {
          "factor": "recent_myocardial_infarction",
          "points": 0,
          "present": false
        },
        {
          "factor": "acute_infectious_disease",
          "points": 0,
          "present": false
        },
        {
          "factor": "acute_rheumatic_disease",
          "points": 0,
          "present": false
        },
        {
          "factor": "malignancy",
          "points": 0,
          "present": false
        },
        {
          "factor": "myeloproliferative_syndrome",
          "points": 0,
          "present": false
        },
        {
          "factor": "nephrotic_syndrome",
          "points": 0,
          "present": false
        },
        {
          "factor": "history_of_vte",
          "points": 0,
          "present": false
        },
        {
          "factor": "known_hypercoagulable_state",
          "points": 0,
          "present": false
        },
        {
          "factor": "immobilization_ge_3d",
          "points": 0,
          "present": false
        },
        {
          "factor": "recent_travel_gt_6h",
          "points": 0,
          "present": false
        },
        {
          "value": 50,
          "factor": "age_gt_60",
          "points": 0,
          "present": false
        },
        {
          "factor": "obesity_bmi_gt_30",
          "points": 0,
          "present": false
        },
        {
          "factor": "chronic_venous_insufficiency",
          "points": 0,
          "present": false
        },
        {
          "factor": "pregnancy",
          "points": 0,
          "present": false
        },
        {
          "factor": "hormonal_therapy",
          "points": 0,
          "present": false
        },
        {
          "factor": "dehydration",
          "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.",
      "citation": {
        "authors": "Chopard P, Spirk D, Bounameaux H",
        "doi": "10.1111/j.1538-7836.2006.01818.x",
        "id": "chopard-2006",
        "pmid": "16553641",
        "source": "J Thromb Haemost. 2006;4(4):915-916",
        "title": "Identifying acutely ill medical patients requiring thromboprophylaxis"
      },
      "formula": "geneva_prophylaxis",
      "formula_expression": "geneva_prophylaxis = cardiac_failure (2) + respiratory_failure (2) + recent_stroke (2) + recent_myocardial_infarction (2) + acute_infectious_disease (2) + acute_rheumatic_disease (2) + malignancy (2) + myeloproliferative_syndrome (2) + nephrotic_syndrome (2) + history_of_vte (2) + known_hypercoagulable_state (2) + immobilization_ge_3d (1) + recent_travel_gt_6h (1) + age>60 (1) + obesity_bmi_gt_30 (1) + chronic_venous_insufficiency (1) + pregnancy (1) + hormonal_therapy (1) + dehydration (1); Chopard 2006 letter table; max 30; <3 low, >=3 high (prophylaxis indicated)",
      "age_years": 50,
      "max_score": 30,
      "score": 0,
      "risk_group": "low"
    },
    {
      "components": [
        {
          "factor": "cardiac_failure",
          "points": 0,
          "present": false
        },
        {
          "factor": "respiratory_failure",
          "points": 0,
          "present": false
        },
        {
          "factor": "recent_stroke",
          "points": 0,
          "present": false
        },
        {
          "factor": "recent_myocardial_infarction",
          "points": 0,
          "present": false
        },
        {
          "factor": "acute_infectious_disease",
          "points": 0,
          "present": false
        },
        {
          "factor": "acute_rheumatic_disease",
          "points": 0,
          "present": false
        },
        {
          "factor": "malignancy",
          "points": 0,
          "present": false
        },
        {
          "factor": "myeloproliferative_syndrome",
          "points": 0,
          "present": false
        },
        {
          "factor": "nephrotic_syndrome",
          "points": 0,
          "present": false
        },
        {
          "factor": "history_of_vte",
          "points": 0,
          "present": false
        },
        {
          "factor": "known_hypercoagulable_state",
          "points": 0,
          "present": false
        },
        {
          "factor": "immobilization_ge_3d",
          "points": 0,
          "present": false
        },
        {
          "factor": "recent_travel_gt_6h",
          "points": 0,
          "present": false
        },
        {
          "value": 50,
          "factor": "age_gt_60",
          "points": 0,
          "present": false
        },
        {
          "factor": "obesity_bmi_gt_30",
          "points": 0,
          "present": false
        },
        {
          "factor": "chronic_venous_insufficiency",
          "points": 0,
          "present": false
        },
        {
          "factor": "pregnancy",
          "points": 0,
          "present": false
        },
        {
          "factor": "hormonal_therapy",
          "points": 0,
          "present": false
        },
        {
          "factor": "dehydration",
          "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.",
      "citation": {
        "authors": "Chopard P, Spirk D, Bounameaux H",
        "doi": "10.1111/j.1538-7836.2006.01818.x",
        "id": "chopard-2006",
        "pmid": "16553641",
        "source": "J Thromb Haemost. 2006;4(4):915-916",
        "title": "Identifying acutely ill medical patients requiring thromboprophylaxis"
      },
      "formula": "geneva_prophylaxis",
      "formula_expression": "geneva_prophylaxis = cardiac_failure (2) + respiratory_failure (2) + recent_stroke (2) + recent_myocardial_infarction (2) + acute_infectious_disease (2) + acute_rheumatic_disease (2) + malignancy (2) + myeloproliferative_syndrome (2) + nephrotic_syndrome (2) + history_of_vte (2) + known_hypercoagulable_state (2) + immobilization_ge_3d (1) + recent_travel_gt_6h (1) + age>60 (1) + obesity_bmi_gt_30 (1) + chronic_venous_insufficiency (1) + pregnancy (1) + hormonal_therapy (1) + dehydration (1); Chopard 2006 letter table; max 30; <3 low, >=3 high (prophylaxis indicated)",
      "age_years": 50,
      "max_score": 30,
      "score": 0,
      "risk_group": "low"
    }
  ]
}

Response

Field	Type	Description
`formula`	string	geneva_prophylaxis
`formula_expression`	string	Exact expression used
`score`	integer	Total points 0-30
`max_score`	integer	Always 30 (11×2 + 8×1)
`risk_group`	string	low when score is <3; high when score is ≥3 (Chopard 2006 prophylaxis indicated). Not a diagnosis or prophylaxis order. Not Padua.
`age_years`	integer	Age used for the >60 criterion
`components`	array	Per-factor points
`citation`	object	Chopard 2006 citation
`disclaimer`	string	Not-a-device notice

Example JSON

Machine form of the same example. Frozen fixture. Not a live lookup.

{
  "components": [
    {
      "factor": "cardiac_failure",
      "points": 0,
      "present": false
    },
    {
      "factor": "respiratory_failure",
      "points": 0,
      "present": false
    },
    {
      "factor": "recent_stroke",
      "points": 0,
      "present": false
    },
    {
      "factor": "recent_myocardial_infarction",
      "points": 0,
      "present": false
    },
    {
      "factor": "acute_infectious_disease",
      "points": 0,
      "present": false
    },
    {
      "factor": "acute_rheumatic_disease",
      "points": 0,
      "present": false
    },
    {
      "factor": "malignancy",
      "points": 0,
      "present": false
    },
    {
      "factor": "myeloproliferative_syndrome",
      "points": 0,
      "present": false
    },
    {
      "factor": "nephrotic_syndrome",
      "points": 0,
      "present": false
    },
    {
      "factor": "history_of_vte",
      "points": 0,
      "present": false
    },
    {
      "factor": "known_hypercoagulable_state",
      "points": 0,
      "present": false
    },
    {
      "factor": "immobilization_ge_3d",
      "points": 0,
      "present": false
    },
    {
      "factor": "recent_travel_gt_6h",
      "points": 0,
      "present": false
    },
    {
      "value": 50,
      "factor": "age_gt_60",
      "points": 0,
      "present": false
    },
    {
      "factor": "obesity_bmi_gt_30",
      "points": 0,
      "present": false
    },
    {
      "factor": "chronic_venous_insufficiency",
      "points": 0,
      "present": false
    },
    {
      "factor": "pregnancy",
      "points": 0,
      "present": false
    },
    {
      "factor": "hormonal_therapy",
      "points": 0,
      "present": false
    },
    {
      "factor": "dehydration",
      "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.",
  "citation": {
    "authors": "Chopard P, Spirk D, Bounameaux H",
    "doi": "10.1111/j.1538-7836.2006.01818.x",
    "id": "chopard-2006",
    "pmid": "16553641",
    "source": "J Thromb Haemost. 2006;4(4):915-916",
    "title": "Identifying acutely ill medical patients requiring thromboprophylaxis"
  },
  "formula": "geneva_prophylaxis",
  "formula_expression": "geneva_prophylaxis = cardiac_failure (2) + respiratory_failure (2) + recent_stroke (2) + recent_myocardial_infarction (2) + acute_infectious_disease (2) + acute_rheumatic_disease (2) + malignancy (2) + myeloproliferative_syndrome (2) + nephrotic_syndrome (2) + history_of_vte (2) + known_hypercoagulable_state (2) + immobilization_ge_3d (1) + recent_travel_gt_6h (1) + age>60 (1) + obesity_bmi_gt_30 (1) + chronic_venous_insufficiency (1) + pregnancy (1) + hormonal_therapy (1) + dehydration (1); Chopard 2006 letter table; max 30; <3 low, >=3 high (prophylaxis indicated)",
  "age_years": 50,
  "max_score": 30,
  "score": 0,
  "risk_group": "low"
}

Client errors (HTTP 400)

Invalid params return 400 without charge. Shared HTTP 402 and 503 meanings: Payments.

HTTP	Code	When
400	`invalid_age`	age must be an integer from 18 to 120 Returned before settlement; you are not charged.
400	`invalid_geneva_prophylaxis`	each Chopard 2006 Geneva prophylaxis flag must be true or false. Returned before settlement; you are not charged.
400	`invalid_flag`	boolean clinical flags must be true or false Returned before settlement; you are not charged.
400	`invalid_items`	POST body must be a JSON object with only an items array Returned before settlement; you are not charged.
400	`invalid_item_count`	items must be an array of 1 to 25 objects Returned before settlement; you are not charged.
400	`invalid_item`	each items entry must be a JSON object Returned before settlement; you are not charged.

Related tools

Padua score — Compute the Barbar 2010 Padua Prediction Score for VTE risk in hospitalized medical patients from age and ten caller-assigned findings.

Payment

Unpaid requests return HTTP 402 even if query parameters or POST items are missing or invalid, so CDP and agents can index the path. After a PAYMENT-SIGNATURE, invalid params return HTTP 400 JSON before settlement. magent does not charge. Fix the params, then request a new 402 quote for that complete URL. Catalog misses (empty matches, found=false) are valid paid 200s. Unpaid valid requests return HTTP 402 with a base64 PAYMENT-REQUIRED header. HTTP 503 is not a new quote: retry the same PAYMENT-SIGNATURE. Full handshake and shared payment errors: Payments. Stdio MCP: /docs/mcp.

Guarantees

HTTP 402 is unpaid, including a missing query. After PAYMENT-SIGNATURE, invalid parameters return HTTP 400 before settlement. You are not charged. HTTP 402 never includes the tool JSON.
exact: settlement finishes before the tool (paymentFlow upfront). batch-settlement: verify/deposit before the tool; chargedCumulativeAmount commits after HTTP 2xx. Uncertain or failed settlement fails closed (HTTP 503). Retry the same PAYMENT-SIGNATURE.
HTTP 402 is unpaid only. Do not sign a second authorization because of a 503.
Execution is timeout-bounded and concurrency-capped.
Calculator inputs are stored encrypted for allowlisted operators (Magent Console). They are not in public logs, SSH lookups, catalog, or rollups. Request logs store path without query.