Hip RAPID score (Hevesi)

RAPID hip

Sum the Hevesi 2018 RAPID points from sex, Tonnis grade, and cam morphology and return the published low, intermediate, or high band.

LIVE $0.005 USDC GET /api/calc/rapid_hip

Markdown: /docs/rapid-hip.md · Canonical: https://magentlab.com/docs/rapid-hip

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

What it computes

Sum the Hevesi 2018 RAPID points from sex, Tonnis grade, and cam morphology and return the published low, intermediate, or high band.

When to use

When an agent already has sex, Tonnis grade 0-2, and a caller-assigned cam flag for hip arthroscopy counseling and must not invent a diagnosis or operative plan.

When not to use

Not a medical device. Not a diagnosis, ALAD grade, or operative plan. magent does not read radiographs or measure alpha angle.
Hevesi 2018 hip RAPID only (acetabular chondrolabral disruption). Not Rahman 2014 RAPID for pleural infection.
Age is not in the score (univariate only in the paper). Tonnis grade 3 is not scored. Cam is a caller-assigned flag (paper univariate used alpha angle >55°).
Published high-grade (ALAD 3-4) damage rates are returned only for score 0 (10.5%) and score 5 (88.0%). Scores 1-4 omit that field; do not treat cohort share as damage risk.

Formula

RAPID = sex_points + tonnis_points + cam_points; female 0 male 1; Tonnis 0=0, 1=2, 2=3; cam present 1; max 5; bands 0-1 low, 2-3 intermediate, 4-5 high (Hevesi 2018 Table 3 / Figure 2)

Citation

Title: The Rapidly Assessed Predictor of Intraoperative Damage (RAPID) Score: An In-Clinic Predictive Model for High-Grade Acetabular Chondrolabral Disruption
Authors: Hevesi M, Hartigan DE, Wu IT, et al.
Source: Orthop J Sports Med. 2018;6(10):2325967118799068
DOI: 10.1177/2325967118799068

Worked example

Female, Tonnis 0, no cam

Given: cam_morphology=falsesex=femaletonnis_grade=0

female → 0; Tonnis 0 → 0; cam absent → 0
score = 0
risk_band low; high-grade damage 10.5%

Male, Tonnis 2, cam present

Given: cam_morphology=truesex=maletonnis_grade=2

male → 1; Tonnis 2 → 3; cam present → 1
score = 5
risk_band high; high-grade damage 88.0%

Also searched as

hip RAPID
Hevesi RAPID
acetabular RAPID
RAPID chondrolabral
Rapidly Assessed Predictor of Intraoperative Damage
Hevesi 2018 RAPID
hip arthroscopy RAPID
Tonnis RAPID hip
cam morphology RAPID

Try

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

/api/calc/rapid_hip?sex=female&tonnis_grade=0&cam_morphology=false

Full URL: https://api.magentlab.com/api/calc/rapid_hip?sex=female&tonnis_grade=0&cam_morphology=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/rapid_hip?sex=female&tonnis_grade=0&cam_morphology=false"

Parameters

Name	Type	Required	Description
`sex`	string	required · female, male	female or male (Hevesi 2018 Table 3). Male scores 1; female scores 0.
`tonnis_grade`	integer	required	Caller-assigned Tonnis osteoarthritis grade 0, 1, or 2 (Hevesi 2018 Table 3). Grade 0 scores 0; grade 1 scores 2; grade 2 scores 3. Grade 3 is invalid (the derivation had no grade 3). magent does not read radiographs.
`cam_morphology`	boolean	required	Caller-assigned cam morphology. true scores 1; false scores 0. Paper univariate used alpha angle >55°; magent does not measure alpha angle. true or false.

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/rapid_hip 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": [
    {
      "cam_morphology": "false",
      "sex": "female",
      "tonnis_grade": "0"
    },
    {
      "cam_morphology": "false",
      "sex": "female",
      "tonnis_grade": "0"
    }
  ]
}

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/rapid_hip",
  "items": [
    {
      "components": [
        {
          "value": "female",
          "factor": "sex",
          "points": 0,
          "present": false
        },
        {
          "value": 0,
          "factor": "tonnis_grade",
          "points": 0,
          "present": false
        },
        {
          "factor": "cam_morphology",
          "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": "Hevesi M, Hartigan DE, Wu IT, et al.",
        "doi": "10.1177/2325967118799068",
        "id": "hevesi-2018",
        "pmid": "30302348",
        "source": "Orthop J Sports Med. 2018;6(10):2325967118799068",
        "title": "The Rapidly Assessed Predictor of Intraoperative Damage (RAPID) Score: An In-Clinic Predictive Model for High-Grade Acetabular Chondrolabral Disruption"
      },
      "formula": "rapid_hip",
      "formula_expression": "RAPID = sex_points + tonnis_points + cam_points; female 0 male 1; Tonnis 0=0, 1=2, 2=3; cam present 1; max 5; bands 0-1 low, 2-3 intermediate, 4-5 high (Hevesi 2018 Table 3 / Figure 2)",
      "max_score": 5,
      "score": 0,
      "risk_band": "low",
      "sex": "female",
      "cam_morphology": false,
      "tonnis_grade": 0,
      "high_grade_damage_percent": 10.5
    },
    {
      "components": [
        {
          "value": "female",
          "factor": "sex",
          "points": 0,
          "present": false
        },
        {
          "value": 0,
          "factor": "tonnis_grade",
          "points": 0,
          "present": false
        },
        {
          "factor": "cam_morphology",
          "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": "Hevesi M, Hartigan DE, Wu IT, et al.",
        "doi": "10.1177/2325967118799068",
        "id": "hevesi-2018",
        "pmid": "30302348",
        "source": "Orthop J Sports Med. 2018;6(10):2325967118799068",
        "title": "The Rapidly Assessed Predictor of Intraoperative Damage (RAPID) Score: An In-Clinic Predictive Model for High-Grade Acetabular Chondrolabral Disruption"
      },
      "formula": "rapid_hip",
      "formula_expression": "RAPID = sex_points + tonnis_points + cam_points; female 0 male 1; Tonnis 0=0, 1=2, 2=3; cam present 1; max 5; bands 0-1 low, 2-3 intermediate, 4-5 high (Hevesi 2018 Table 3 / Figure 2)",
      "max_score": 5,
      "score": 0,
      "risk_band": "low",
      "sex": "female",
      "cam_morphology": false,
      "tonnis_grade": 0,
      "high_grade_damage_percent": 10.5
    }
  ]
}

Response

Field	Type	Description
`formula`	string	rapid_hip
`formula_expression`	string	Exact expression used
`score`	integer	Hevesi 2018 RAPID points 0-5
`max_score`	integer	Always 5
`risk_band`	string	Figure 2 band: low (0-1), intermediate (2-3), or high (4-5)
`high_grade_damage_percent`	number	Published high-grade (ALAD 3-4) damage rate: 10.5 at score 0 and 88.0 at score 5. Omitted for scores 1-4 (no published rate).
`sex`	string	Sex used: female or male
`tonnis_grade`	integer	Tonnis grade used (0, 1, or 2)
`cam_morphology`	boolean	Whether caller-assigned cam morphology was scored
`components`	array	Per-factor points
`citation`	object	Hevesi et al. OJSM 2018 citation
`disclaimer`	string	Not-a-device notice

Example JSON

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

{
  "components": [
    {
      "value": "female",
      "factor": "sex",
      "points": 0,
      "present": false
    },
    {
      "value": 0,
      "factor": "tonnis_grade",
      "points": 0,
      "present": false
    },
    {
      "factor": "cam_morphology",
      "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": "Hevesi M, Hartigan DE, Wu IT, et al.",
    "doi": "10.1177/2325967118799068",
    "id": "hevesi-2018",
    "pmid": "30302348",
    "source": "Orthop J Sports Med. 2018;6(10):2325967118799068",
    "title": "The Rapidly Assessed Predictor of Intraoperative Damage (RAPID) Score: An In-Clinic Predictive Model for High-Grade Acetabular Chondrolabral Disruption"
  },
  "formula": "rapid_hip",
  "formula_expression": "RAPID = sex_points + tonnis_points + cam_points; female 0 male 1; Tonnis 0=0, 1=2, 2=3; cam present 1; max 5; bands 0-1 low, 2-3 intermediate, 4-5 high (Hevesi 2018 Table 3 / Figure 2)",
  "max_score": 5,
  "score": 0,
  "risk_band": "low",
  "sex": "female",
  "cam_morphology": false,
  "tonnis_grade": 0,
  "high_grade_damage_percent": 10.5
}

Client errors (HTTP 400)

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

HTTP	Code	When
400	`invalid_sex`	sex must be female or male Returned before settlement; you are not charged.
400	`invalid_tonnis`	tonnis_grade must be 0, 1, or 2 (Hevesi 2018 RAPID; grade 3 is not scored). 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

NHFS — Sum the Maxwell 2008 Nottingham hip fracture score from seven preoperative variables and return the integer total (max 10).
Mirels — Sum the Mirels 1989 score for diagnosing impending pathologic fractures in long-bone metastatic disease from four caller-assigned items and return the published 4–12 integer total and band (≤7 / 8 / ≥9). Not an operative order and not SINS.

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.