MAGENT

Infection / VTE · LIVE

Caprini VTE score

Caprini score

Sum Caprini 2005 Table 3 thrombosis risk factors with exclusive age and surgery weights and return the Table 2 band (low / moderate / high / highest).

LIVE $0.005 USDC GET /api/calc/caprini

Markdown: /docs/caprini.md · Canonical: https://magentlab.com/docs/caprini

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

What it computes

Sum Caprini 2005 Table 3 thrombosis risk factors with exclusive age and surgery weights and return the Table 2 band (low / moderate / high / highest).

When to use

When an agent needs the Caprini 2005 point total (not Padua, not Caprini 2009/2013) from caller-assigned Table 3 flags and must not invent a diagnosis or prophylaxis order.

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.
  • Caprini 2005 Table 3 factors and Table 2 bands only. Not Caprini 2009 or 2013 revisions (those use different factors and cutoffs).
  • Age bands are mutually exclusive (41-60 = 1, 61-74 = 2, >=75 = 3; age 40 or younger scores 0 for age). Surgery categories are mutually exclusive.
  • Does not return DVT incidence percents or a prophylaxis regimen.
  • Obesity is a caller-applied BMI >25 flag; magent does not take height or weight.

Formula

Caprini 2005 = exclusive age (<=40: 0, 41-60: 1, 61-74: 2, >=75: 3) + exclusive surgery (none 0, minor 1, arthroscopic 2, major >45 min 2, laparoscopic >45 min 2, elective arthroplasty 5) + Table 3 flags (1, 2, 3, or 5); max 78; 0-1 low, 2 moderate, 3-4 high, >=5 highest

Citation

Title
Thrombosis risk assessment as a guide to quality patient care
Authors
Caprini JA
Source
Dis Mon. 2005;51(2-3):70-78
DOI
10.1016/j.disamonth.2005.02.003

Worked example

Age 50, no other Table 3 factors

Given: surgery=noneage=50adverse_pregnancy_history=falseobesity=falseabnormal_pulmonary_function=falseelevated_homocysteine=falseheparin_induced_thrombocytopenia=falseswollen_legs=falseother_risk_factor=falsevaricose_veins=falseinflammatory_bowel_disease=falseconfined_to_bed_gt_72h=falsemalignancy=falsespinal_cord_injury=falseserious_lung_disease=falsepregnancy_or_postpartum=falsecongestive_heart_failure=falseoral_contraceptives_or_hrt=falseprior_major_surgery=falseanticardiolipin_antibodies=falseacute_myocardial_infarction=falsemedical_bed_rest=falsehip_pelvis_leg_fracture=falselupus_anticoagulant=falseimmobilizing_plaster_cast=falsecentral_venous_access=falsefactor_v_leiden=falseprothrombin_20210a=falseother_thrombophilia=falsesepsis=falsemultiple_trauma=falsestroke=falsefamily_history_thrombosis=falsehistory_dvt_pe=false

  1. Age 50 is 41-60 → 1; surgery none → 0; all flags false → 0
  2. Score = 1 (max 78); risk_band low

Also searched as

  • Caprini score
  • Caprini RAM
  • Caprini VTE risk
  • thrombosis risk assessment
  • Caprini 2005
  • venous thromboembolism risk
  • Caprini risk factor score

Try

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

/api/calc/caprini?age=50&surgery=none&prior_major_surgery=false&varicose_veins=false&inflammatory_bowel_disease=false&swollen_legs=false&obesity=false&acute_myocardial_infarction=false&congestive_heart_failure=false&sepsis=false&serious_lung_disease=false&abnormal_pulmonary_function=false&medical_bed_rest=false&other_risk_factor=false&oral_contraceptives_or_hrt=false&pregnancy_or_postpartum=false&adverse_pregnancy_history=false&malignancy=false&confined_to_bed_gt_72h=false&immobilizing_plaster_cast=false&central_venous_access=false&history_dvt_pe=false&family_history_thrombosis=false&factor_v_leiden=false&prothrombin_20210a=false&elevated_homocysteine=false&lupus_anticoagulant=false&anticardiolipin_antibodies=false&heparin_induced_thrombocytopenia=false&other_thrombophilia=false&hip_pelvis_leg_fracture=false&stroke=false&multiple_trauma=false&spinal_cord_injury=false

Full URL: https://api.magentlab.com/api/calc/caprini?age=50&surgery=none&prior_major_surgery=false&varicose_veins=false&inflammatory_bowel_disease=false&swollen_legs=false&obesity=false&acute_myocardial_infarction=false&congestive_heart_failure=false&sepsis=false&serious_lung_disease=false&abnormal_pulmonary_function=false&medical_bed_rest=false&other_risk_factor=false&oral_contraceptives_or_hrt=false&pregnancy_or_postpartum=false&adverse_pregnancy_history=false&malignancy=false&confined_to_bed_gt_72h=false&immobilizing_plaster_cast=false&central_venous_access=false&history_dvt_pe=false&family_history_thrombosis=false&factor_v_leiden=false&prothrombin_20210a=false&elevated_homocysteine=false&lupus_anticoagulant=false&anticardiolipin_antibodies=false&heparin_induced_thrombocytopenia=false&other_thrombophilia=false&hip_pelvis_leg_fracture=false&stroke=false&multiple_trauma=false&spinal_cord_injury=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/caprini?age=50&surgery=none&prior_major_surgery=false&varicose_veins=false&inflammatory_bowel_disease=false&swollen_legs=false&obesity=false&acute_myocardial_infarction=false&congestive_heart_failure=false&sepsis=false&serious_lung_disease=false&abnormal_pulmonary_function=false&medical_bed_rest=false&other_risk_factor=false&oral_contraceptives_or_hrt=false&pregnancy_or_postpartum=false&adverse_pregnancy_history=false&malignancy=false&confined_to_bed_gt_72h=false&immobilizing_plaster_cast=false&central_venous_access=false&history_dvt_pe=false&family_history_thrombosis=false&factor_v_leiden=false&prothrombin_20210a=false&elevated_homocysteine=false&lupus_anticoagulant=false&anticardiolipin_antibodies=false&heparin_induced_thrombocytopenia=false&other_thrombophilia=false&hip_pelvis_leg_fracture=false&stroke=false&multiple_trauma=false&spinal_cord_injury=false"

Parameters

Name Type Required Description
age integer required Age in years (18-120). Caprini 2005 exclusive bands: 41-60 scores 1; 61-74 scores 2; 75 or older scores 3. Age 40 or younger scores 0 for age.
surgery string required · none, minor, arthroscopic, major, laparoscopic, arthroplasty Mutually exclusive Caprini 2005 Table 3 surgery category as assigned by the caller. none scores 0. minor (minor surgery planned) scores 1. arthroscopic, major (major surgery >45 minutes), and laparoscopic (laparoscopic surgery >45 minutes) score 2. arthroplasty (elective major lower extremity arthroplasty) scores 5. One category only. History of prior major surgery is a separate 1-point flag.
prior_major_surgery boolean required History of prior major surgery (<1 month) as assigned by the caller (Caprini 2005 Table 3). Independent of the exclusive surgery category. true scores 1.
varicose_veins boolean required Varicose veins as assigned by the caller (Caprini 2005 Table 3). true scores 1. magent does not examine the patient.
inflammatory_bowel_disease boolean required History of inflammatory bowel disease as assigned by the caller (Caprini 2005 Table 3). true scores 1.
swollen_legs boolean required Swollen legs (current) as assigned by the caller (Caprini 2005 Table 3). true scores 1. magent does not examine the patient.
obesity boolean required Obesity as assigned by the caller (Caprini 2005 BMI >25). true scores 1. magent does not take height or weight.
acute_myocardial_infarction boolean required Acute myocardial infarction as assigned by the caller (Caprini 2005 Table 3). true scores 1.
congestive_heart_failure boolean required Congestive heart failure (<1 month) as assigned by the caller (Caprini 2005 Table 3). true scores 1.
sepsis boolean required Sepsis (<1 month) as assigned by the caller (Caprini 2005 Table 3). true scores 1.
serious_lung_disease boolean required Serious lung disease including pneumonia (<1 month) as assigned by the caller (Caprini 2005 Table 3). true scores 1.
abnormal_pulmonary_function boolean required Abnormal pulmonary function (COPD) as assigned by the caller (Caprini 2005 Table 3). true scores 1.
medical_bed_rest boolean required Medical patient currently at bed rest as assigned by the caller (Caprini 2005 Table 3). true scores 1. Independent of confined_to_bed_gt_72h.
other_risk_factor boolean required Other Caprini 2005 Table 3 1-point risk factor as assigned by the caller. true scores 1. magent does not invent a factor from prose.
oral_contraceptives_or_hrt boolean required Oral contraceptives or hormone replacement therapy as assigned by the caller (Caprini 2005 Table 3, listed for women). true scores 1.
pregnancy_or_postpartum boolean required Pregnancy or postpartum (<1 month) as assigned by the caller (Caprini 2005 Table 3, listed for women). true scores 1.
adverse_pregnancy_history boolean required History of unexplained stillborn infant, recurrent spontaneous abortion (>=3), premature birth with toxemia, or growth-restricted infant as assigned by the caller (Caprini 2005 Table 3, listed for women). true scores 1.
malignancy boolean required Malignancy (present or previous) as assigned by the caller (Caprini 2005 Table 3). true scores 2.
confined_to_bed_gt_72h boolean required Patient confined to bed (>72 hours) as assigned by the caller (Caprini 2005 Table 3). true scores 2. Independent of medical_bed_rest.
immobilizing_plaster_cast boolean required Immobilizing plaster cast (<1 month) as assigned by the caller (Caprini 2005 Table 3). true scores 2.
central_venous_access boolean required Central venous access as assigned by the caller (Caprini 2005 Table 3). true scores 2.
history_dvt_pe boolean required History of DVT or PE as assigned by the caller (Caprini 2005 Table 3). true scores 3. magent does not diagnose VTE.
family_history_thrombosis boolean required Family history of thrombosis as assigned by the caller (Caprini 2005 Table 3). true scores 3.
factor_v_leiden boolean required Positive Factor V Leiden as assigned by the caller (Caprini 2005 Table 3). true scores 3.
prothrombin_20210a boolean required Positive Prothrombin 20210A as assigned by the caller (Caprini 2005 Table 3). true scores 3.
elevated_homocysteine boolean required Elevated serum homocysteine as assigned by the caller (Caprini 2005 Table 3). true scores 3.
lupus_anticoagulant boolean required Positive lupus anticoagulant as assigned by the caller (Caprini 2005 Table 3). true scores 3.
anticardiolipin_antibodies boolean required Elevated anticardiolipin antibodies as assigned by the caller (Caprini 2005 Table 3). true scores 3.
heparin_induced_thrombocytopenia boolean required Heparin-induced thrombocytopenia (HIT) as assigned by the caller (Caprini 2005 Table 3). true scores 3. magent does not diagnose HIT.
other_thrombophilia boolean required Other congenital or acquired thrombophilia as assigned by the caller (Caprini 2005 Table 3). true scores 3.
hip_pelvis_leg_fracture boolean required Hip, pelvis, or leg fracture (<1 month) as assigned by the caller (Caprini 2005 Table 3). true scores 5. Independent of exclusive surgery.
stroke boolean required Stroke (<1 month) as assigned by the caller (Caprini 2005 Table 3). true scores 5.
multiple_trauma boolean required Multiple trauma (<1 month) as assigned by the caller (Caprini 2005 Table 3). true scores 5.
spinal_cord_injury boolean required Acute spinal cord injury (paralysis) (<1 month) as assigned by the caller (Caprini 2005 Table 3). true scores 5.

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/caprini 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": [
    {
      "history_dvt_pe": "false",
      "family_history_thrombosis": "false",
      "stroke": "false",
      "multiple_trauma": "false",
      "sepsis": "false",
      "other_thrombophilia": "false",
      "prothrombin_20210a": "false",
      "factor_v_leiden": "false",
      "central_venous_access": "false",
      "immobilizing_plaster_cast": "false",
      "lupus_anticoagulant": "false",
      "hip_pelvis_leg_fracture": "false",
      "medical_bed_rest": "false",
      "acute_myocardial_infarction": "false",
      "anticardiolipin_antibodies": "false",
      "prior_major_surgery": "false",
      "oral_contraceptives_or_hrt": "false",
      "congestive_heart_failure": "false",
      "pregnancy_or_postpartum": "false",
      "serious_lung_disease": "false",
      "spinal_cord_injury": "false",
      "malignancy": "false",
      "confined_to_bed_gt_72h": "false",
      "inflammatory_bowel_disease": "false",
      "varicose_veins": "false",
      "other_risk_factor": "false",
      "swollen_legs": "false",
      "heparin_induced_thrombocytopenia": "false",
      "elevated_homocysteine": "false",
      "abnormal_pulmonary_function": "false",
      "obesity": "false",
      "adverse_pregnancy_history": "false",
      "age": "50",
      "surgery": "none"
    },
    {
      "history_dvt_pe": "false",
      "family_history_thrombosis": "false",
      "stroke": "false",
      "multiple_trauma": "false",
      "sepsis": "false",
      "other_thrombophilia": "false",
      "prothrombin_20210a": "false",
      "factor_v_leiden": "false",
      "central_venous_access": "false",
      "immobilizing_plaster_cast": "false",
      "lupus_anticoagulant": "false",
      "hip_pelvis_leg_fracture": "false",
      "medical_bed_rest": "false",
      "acute_myocardial_infarction": "false",
      "anticardiolipin_antibodies": "false",
      "prior_major_surgery": "false",
      "oral_contraceptives_or_hrt": "false",
      "congestive_heart_failure": "false",
      "pregnancy_or_postpartum": "false",
      "serious_lung_disease": "false",
      "spinal_cord_injury": "false",
      "malignancy": "false",
      "confined_to_bed_gt_72h": "false",
      "inflammatory_bowel_disease": "false",
      "varicose_veins": "false",
      "other_risk_factor": "false",
      "swollen_legs": "false",
      "heparin_induced_thrombocytopenia": "false",
      "elevated_homocysteine": "false",
      "abnormal_pulmonary_function": "false",
      "obesity": "false",
      "adverse_pregnancy_history": "false",
      "age": "50",
      "surgery": "none"
    }
  ]
}

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/caprini",
  "items": [
    {
      "components": [
        {
          "value": 50,
          "factor": "age",
          "points": 1,
          "present": true
        },
        {
          "value": "none",
          "factor": "surgery",
          "points": 0,
          "present": false
        },
        {
          "factor": "prior_major_surgery",
          "points": 0,
          "present": false
        },
        {
          "factor": "varicose_veins",
          "points": 0,
          "present": false
        },
        {
          "factor": "inflammatory_bowel_disease",
          "points": 0,
          "present": false
        },
        {
          "factor": "swollen_legs",
          "points": 0,
          "present": false
        },
        {
          "factor": "obesity",
          "points": 0,
          "present": false
        },
        {
          "factor": "acute_myocardial_infarction",
          "points": 0,
          "present": false
        },
        {
          "factor": "congestive_heart_failure",
          "points": 0,
          "present": false
        },
        {
          "factor": "sepsis",
          "points": 0,
          "present": false
        },
        {
          "factor": "serious_lung_disease",
          "points": 0,
          "present": false
        },
        {
          "factor": "abnormal_pulmonary_function",
          "points": 0,
          "present": false
        },
        {
          "factor": "medical_bed_rest",
          "points": 0,
          "present": false
        },
        {
          "factor": "other_risk_factor",
          "points": 0,
          "present": false
        },
        {
          "factor": "oral_contraceptives_or_hrt",
          "points": 0,
          "present": false
        },
        {
          "factor": "pregnancy_or_postpartum",
          "points": 0,
          "present": false
        },
        {
          "factor": "adverse_pregnancy_history",
          "points": 0,
          "present": false
        },
        {
          "factor": "malignancy",
          "points": 0,
          "present": false
        },
        {
          "factor": "confined_to_bed_gt_72h",
          "points": 0,
          "present": false
        },
        {
          "factor": "immobilizing_plaster_cast",
          "points": 0,
          "present": false
        },
        {
          "factor": "central_venous_access",
          "points": 0,
          "present": false
        },
        {
          "factor": "history_dvt_pe",
          "points": 0,
          "present": false
        },
        {
          "factor": "family_history_thrombosis",
          "points": 0,
          "present": false
        },
        {
          "factor": "factor_v_leiden",
          "points": 0,
          "present": false
        },
        {
          "factor": "prothrombin_20210a",
          "points": 0,
          "present": false
        },
        {
          "factor": "elevated_homocysteine",
          "points": 0,
          "present": false
        },
        {
          "factor": "lupus_anticoagulant",
          "points": 0,
          "present": false
        },
        {
          "factor": "anticardiolipin_antibodies",
          "points": 0,
          "present": false
        },
        {
          "factor": "heparin_induced_thrombocytopenia",
          "points": 0,
          "present": false
        },
        {
          "factor": "other_thrombophilia",
          "points": 0,
          "present": false
        },
        {
          "factor": "hip_pelvis_leg_fracture",
          "points": 0,
          "present": false
        },
        {
          "factor": "stroke",
          "points": 0,
          "present": false
        },
        {
          "factor": "multiple_trauma",
          "points": 0,
          "present": false
        },
        {
          "factor": "spinal_cord_injury",
          "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.",
      "age_years": 50,
      "citation": {
        "authors": "Caprini JA",
        "doi": "10.1016/j.disamonth.2005.02.003",
        "id": "caprini-2005",
        "pmid": "15900257",
        "source": "Dis Mon. 2005;51(2-3):70-78",
        "title": "Thrombosis risk assessment as a guide to quality patient care"
      },
      "formula": "caprini",
      "formula_expression": "Caprini 2005 = exclusive age (<=40: 0, 41-60: 1, 61-74: 2, >=75: 3) + exclusive surgery (none 0, minor 1, arthroscopic 2, major >45 min 2, laparoscopic >45 min 2, elective arthroplasty 5) + Table 3 flags (1, 2, 3, or 5); max 78; 0-1 low, 2 moderate, 3-4 high, >=5 highest",
      "max_score": 78,
      "score": 1,
      "risk_band": "low",
      "surgery": "none"
    },
    {
      "components": [
        {
          "value": 50,
          "factor": "age",
          "points": 1,
          "present": true
        },
        {
          "value": "none",
          "factor": "surgery",
          "points": 0,
          "present": false
        },
        {
          "factor": "prior_major_surgery",
          "points": 0,
          "present": false
        },
        {
          "factor": "varicose_veins",
          "points": 0,
          "present": false
        },
        {
          "factor": "inflammatory_bowel_disease",
          "points": 0,
          "present": false
        },
        {
          "factor": "swollen_legs",
          "points": 0,
          "present": false
        },
        {
          "factor": "obesity",
          "points": 0,
          "present": false
        },
        {
          "factor": "acute_myocardial_infarction",
          "points": 0,
          "present": false
        },
        {
          "factor": "congestive_heart_failure",
          "points": 0,
          "present": false
        },
        {
          "factor": "sepsis",
          "points": 0,
          "present": false
        },
        {
          "factor": "serious_lung_disease",
          "points": 0,
          "present": false
        },
        {
          "factor": "abnormal_pulmonary_function",
          "points": 0,
          "present": false
        },
        {
          "factor": "medical_bed_rest",
          "points": 0,
          "present": false
        },
        {
          "factor": "other_risk_factor",
          "points": 0,
          "present": false
        },
        {
          "factor": "oral_contraceptives_or_hrt",
          "points": 0,
          "present": false
        },
        {
          "factor": "pregnancy_or_postpartum",
          "points": 0,
          "present": false
        },
        {
          "factor": "adverse_pregnancy_history",
          "points": 0,
          "present": false
        },
        {
          "factor": "malignancy",
          "points": 0,
          "present": false
        },
        {
          "factor": "confined_to_bed_gt_72h",
          "points": 0,
          "present": false
        },
        {
          "factor": "immobilizing_plaster_cast",
          "points": 0,
          "present": false
        },
        {
          "factor": "central_venous_access",
          "points": 0,
          "present": false
        },
        {
          "factor": "history_dvt_pe",
          "points": 0,
          "present": false
        },
        {
          "factor": "family_history_thrombosis",
          "points": 0,
          "present": false
        },
        {
          "factor": "factor_v_leiden",
          "points": 0,
          "present": false
        },
        {
          "factor": "prothrombin_20210a",
          "points": 0,
          "present": false
        },
        {
          "factor": "elevated_homocysteine",
          "points": 0,
          "present": false
        },
        {
          "factor": "lupus_anticoagulant",
          "points": 0,
          "present": false
        },
        {
          "factor": "anticardiolipin_antibodies",
          "points": 0,
          "present": false
        },
        {
          "factor": "heparin_induced_thrombocytopenia",
          "points": 0,
          "present": false
        },
        {
          "factor": "other_thrombophilia",
          "points": 0,
          "present": false
        },
        {
          "factor": "hip_pelvis_leg_fracture",
          "points": 0,
          "present": false
        },
        {
          "factor": "stroke",
          "points": 0,
          "present": false
        },
        {
          "factor": "multiple_trauma",
          "points": 0,
          "present": false
        },
        {
          "factor": "spinal_cord_injury",
          "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.",
      "age_years": 50,
      "citation": {
        "authors": "Caprini JA",
        "doi": "10.1016/j.disamonth.2005.02.003",
        "id": "caprini-2005",
        "pmid": "15900257",
        "source": "Dis Mon. 2005;51(2-3):70-78",
        "title": "Thrombosis risk assessment as a guide to quality patient care"
      },
      "formula": "caprini",
      "formula_expression": "Caprini 2005 = exclusive age (<=40: 0, 41-60: 1, 61-74: 2, >=75: 3) + exclusive surgery (none 0, minor 1, arthroscopic 2, major >45 min 2, laparoscopic >45 min 2, elective arthroplasty 5) + Table 3 flags (1, 2, 3, or 5); max 78; 0-1 low, 2 moderate, 3-4 high, >=5 highest",
      "max_score": 78,
      "score": 1,
      "risk_band": "low",
      "surgery": "none"
    }
  ]
}

Response

Field Type Description
formula string caprini
formula_expression string Exact expression used
score integer Caprini 2005 Table 3 points 0-78
max_score integer 78 (exclusive age and surgery)
risk_band string Caprini 2005 Table 2 band: low (0-1), moderate (2), high (3-4), or highest (>=5). A band, not a diagnosis or prophylaxis order.
age_years integer Age used for the exclusive age band
surgery string Exclusive surgery category used (none, minor, arthroscopic, major, laparoscopic, or arthroplasty)
components array Per-factor points
citation object Caprini Dis Mon 2005 citation
disclaimer string Not-a-device notice

Example JSON

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

{
  "components": [
    {
      "value": 50,
      "factor": "age",
      "points": 1,
      "present": true
    },
    {
      "value": "none",
      "factor": "surgery",
      "points": 0,
      "present": false
    },
    {
      "factor": "prior_major_surgery",
      "points": 0,
      "present": false
    },
    {
      "factor": "varicose_veins",
      "points": 0,
      "present": false
    },
    {
      "factor": "inflammatory_bowel_disease",
      "points": 0,
      "present": false
    },
    {
      "factor": "swollen_legs",
      "points": 0,
      "present": false
    },
    {
      "factor": "obesity",
      "points": 0,
      "present": false
    },
    {
      "factor": "acute_myocardial_infarction",
      "points": 0,
      "present": false
    },
    {
      "factor": "congestive_heart_failure",
      "points": 0,
      "present": false
    },
    {
      "factor": "sepsis",
      "points": 0,
      "present": false
    },
    {
      "factor": "serious_lung_disease",
      "points": 0,
      "present": false
    },
    {
      "factor": "abnormal_pulmonary_function",
      "points": 0,
      "present": false
    },
    {
      "factor": "medical_bed_rest",
      "points": 0,
      "present": false
    },
    {
      "factor": "other_risk_factor",
      "points": 0,
      "present": false
    },
    {
      "factor": "oral_contraceptives_or_hrt",
      "points": 0,
      "present": false
    },
    {
      "factor": "pregnancy_or_postpartum",
      "points": 0,
      "present": false
    },
    {
      "factor": "adverse_pregnancy_history",
      "points": 0,
      "present": false
    },
    {
      "factor": "malignancy",
      "points": 0,
      "present": false
    },
    {
      "factor": "confined_to_bed_gt_72h",
      "points": 0,
      "present": false
    },
    {
      "factor": "immobilizing_plaster_cast",
      "points": 0,
      "present": false
    },
    {
      "factor": "central_venous_access",
      "points": 0,
      "present": false
    },
    {
      "factor": "history_dvt_pe",
      "points": 0,
      "present": false
    },
    {
      "factor": "family_history_thrombosis",
      "points": 0,
      "present": false
    },
    {
      "factor": "factor_v_leiden",
      "points": 0,
      "present": false
    },
    {
      "factor": "prothrombin_20210a",
      "points": 0,
      "present": false
    },
    {
      "factor": "elevated_homocysteine",
      "points": 0,
      "present": false
    },
    {
      "factor": "lupus_anticoagulant",
      "points": 0,
      "present": false
    },
    {
      "factor": "anticardiolipin_antibodies",
      "points": 0,
      "present": false
    },
    {
      "factor": "heparin_induced_thrombocytopenia",
      "points": 0,
      "present": false
    },
    {
      "factor": "other_thrombophilia",
      "points": 0,
      "present": false
    },
    {
      "factor": "hip_pelvis_leg_fracture",
      "points": 0,
      "present": false
    },
    {
      "factor": "stroke",
      "points": 0,
      "present": false
    },
    {
      "factor": "multiple_trauma",
      "points": 0,
      "present": false
    },
    {
      "factor": "spinal_cord_injury",
      "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.",
  "age_years": 50,
  "citation": {
    "authors": "Caprini JA",
    "doi": "10.1016/j.disamonth.2005.02.003",
    "id": "caprini-2005",
    "pmid": "15900257",
    "source": "Dis Mon. 2005;51(2-3):70-78",
    "title": "Thrombosis risk assessment as a guide to quality patient care"
  },
  "formula": "caprini",
  "formula_expression": "Caprini 2005 = exclusive age (<=40: 0, 41-60: 1, 61-74: 2, >=75: 3) + exclusive surgery (none 0, minor 1, arthroscopic 2, major >45 min 2, laparoscopic >45 min 2, elective arthroplasty 5) + Table 3 flags (1, 2, 3, or 5); max 78; 0-1 low, 2 moderate, 3-4 high, >=5 highest",
  "max_score": 78,
  "score": 1,
  "risk_band": "low",
  "surgery": "none"
}

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_flag boolean clinical flags must be true or false Returned before settlement; you are not charged.
400 invalid_caprini each Caprini 2005 VTE item must be a published weight for that factor. 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.