Respiratory · LIVE

Preschool Respiratory Assessment Measure (PRAM)

PRAM

Sum five caller-assigned Chalut 2000 PRAM item points and return the published 0-12 total.

LIVE $0.005 USDC GET /api/calc/pram

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

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

What it computes

Sum five caller-assigned Chalut 2000 PRAM item points and return the published 0-12 total.

When to use

When an agent has already assigned published Chalut 2000 points for oxygen saturation, suprasternal retractions, scalene contraction, air entry, and wheezing and needs the 0-12 total. magent does not auscultate, measure saturation, or diagnose asthma.

When not to use

Not a medical device and not an asthma diagnosis or a treatment or admission order.
Each of the five items is a caller-assigned published point value from Chalut 2000. magent does not auscultate, measure oxygen saturation, or examine the patient.
Chalut 2000 5-item index, max 12. Score only; magent does not emit mild/moderate/severe 0-3/4-7/8-12 bands. Ducharme 2008 validated the same 5-item 12-point score in ages 2-17 and is not used here as extra cutoffs.
Not the Westley 1978 croup score.

Formula

PRAM = oxygen_sat_points + suprasternal + scalene + air_entry + wheezing; Chalut 2000 caller-assigned points; oxygen_sat_points 0/1/2, suprasternal 0/2, scalene 0/2, air_entry 0-3, wheezing 0-3; max 12

Citation

Title: The Preschool Respiratory Assessment Measure (PRAM): a responsive index of acute asthma severity
Authors: Chalut DS, Ducharme FM, Davis GM
Source: J Pediatr. 2000;137(6):762-768
DOI: 10.1067/mpd.2000.110562

Worked example

All items 0

Given: air_entry=0oxygen_sat_points=0scalene=0suprasternal=0wheezing=0

oxygen_sat_points 0 + suprasternal 0 + scalene 0 + air_entry 0 + wheezing 0
Score = 0 (max 12)

Maximum 12

Given: air_entry=3oxygen_sat_points=2scalene=2suprasternal=2wheezing=3

oxygen_sat_points 2 + suprasternal 2 + scalene 2 + air_entry 3 + wheezing 3
Score = 12 (max 12)

Also searched as

Preschool Respiratory Assessment Measure
PRAM
PRAM asthma
Chalut PRAM
PRAM 2000
preschool asthma score
PRAM score
acute asthma PRAM

Try

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

/api/calc/pram?oxygen_sat_points=0&suprasternal=0&scalene=0&air_entry=0&wheezing=0

Full URL: https://api.magentlab.com/api/calc/pram?oxygen_sat_points=0&suprasternal=0&scalene=0&air_entry=0&wheezing=0

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/pram?oxygen_sat_points=0&suprasternal=0&scalene=0&air_entry=0&wheezing=0"

Parameters

Name	Type	Required	Description
`oxygen_sat_points`	integer	required	Caller-assigned Chalut 2000 PRAM oxygen saturation points (integer 0, 1, or 2): 0 if ≥95%; 1 if 92-94%; 2 if <92%. magent does not measure oxygen saturation.
`suprasternal`	integer	required	Caller-assigned Chalut 2000 PRAM suprasternal retractions (integer 0 or 2): 0 absent; 2 present. Not 1. magent does not examine the patient.
`scalene`	integer	required	Caller-assigned Chalut 2000 PRAM scalene muscle contraction (integer 0 or 2): 0 absent; 2 present. Not 1. magent does not examine the patient.
`air_entry`	integer	required	Caller-assigned Chalut 2000 PRAM air entry (integer 0, 1, 2, or 3): 0 normal; 1 decreased at the base; 2 decreased at the apex and base; 3 minimal or absent. magent does not auscultate.
`wheezing`	integer	required	Caller-assigned Chalut 2000 PRAM wheezing (integer 0, 1, 2, or 3): 0 absent; 1 expiratory only; 2 inspiratory with or without expiratory; 3 audible without a stethoscope or silent chest. magent does not auscultate.

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/pram 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": [
    {
      "air_entry": "0",
      "oxygen_sat_points": "0",
      "scalene": "0",
      "suprasternal": "0",
      "wheezing": "0"
    },
    {
      "air_entry": "0",
      "oxygen_sat_points": "0",
      "scalene": "0",
      "suprasternal": "0",
      "wheezing": "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/pram",
  "items": [
    {
      "components": [
        {
          "value": 0,
          "factor": "oxygen_sat_points",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "suprasternal",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "scalene",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "air_entry",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "wheezing",
          "points": 0,
          "present": 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.",
      "citation": {
        "authors": "Chalut DS, Ducharme FM, Davis GM",
        "doi": "10.1067/mpd.2000.110562",
        "id": "chalut-2000",
        "pmid": "11113831",
        "source": "J Pediatr. 2000;137(6):762-768",
        "title": "The Preschool Respiratory Assessment Measure (PRAM): a responsive index of acute asthma severity"
      },
      "formula": "pram",
      "formula_expression": "PRAM = oxygen_sat_points + suprasternal + scalene + air_entry + wheezing; Chalut 2000 caller-assigned points; oxygen_sat_points 0/1/2, suprasternal 0/2, scalene 0/2, air_entry 0-3, wheezing 0-3; max 12",
      "max_score": 12,
      "score": 0
    },
    {
      "components": [
        {
          "value": 0,
          "factor": "oxygen_sat_points",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "suprasternal",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "scalene",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "air_entry",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "wheezing",
          "points": 0,
          "present": 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.",
      "citation": {
        "authors": "Chalut DS, Ducharme FM, Davis GM",
        "doi": "10.1067/mpd.2000.110562",
        "id": "chalut-2000",
        "pmid": "11113831",
        "source": "J Pediatr. 2000;137(6):762-768",
        "title": "The Preschool Respiratory Assessment Measure (PRAM): a responsive index of acute asthma severity"
      },
      "formula": "pram",
      "formula_expression": "PRAM = oxygen_sat_points + suprasternal + scalene + air_entry + wheezing; Chalut 2000 caller-assigned points; oxygen_sat_points 0/1/2, suprasternal 0/2, scalene 0/2, air_entry 0-3, wheezing 0-3; max 12",
      "max_score": 12,
      "score": 0
    }
  ]
}

Response

Field	Type	Description
`formula`	string	pram
`formula_expression`	string	Exact expression used
`score`	integer	PRAM points 0-12
`max_score`	integer	Always 12
`components`	array	Per-item caller-assigned points
`citation`	object	Chalut et al. J Pediatr 2000 citation
`disclaimer`	string	Not-a-device notice

Example JSON

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

{
  "components": [
    {
      "value": 0,
      "factor": "oxygen_sat_points",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "suprasternal",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "scalene",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "air_entry",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "wheezing",
      "points": 0,
      "present": 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.",
  "citation": {
    "authors": "Chalut DS, Ducharme FM, Davis GM",
    "doi": "10.1067/mpd.2000.110562",
    "id": "chalut-2000",
    "pmid": "11113831",
    "source": "J Pediatr. 2000;137(6):762-768",
    "title": "The Preschool Respiratory Assessment Measure (PRAM): a responsive index of acute asthma severity"
  },
  "formula": "pram",
  "formula_expression": "PRAM = oxygen_sat_points + suprasternal + scalene + air_entry + wheezing; Chalut 2000 caller-assigned points; oxygen_sat_points 0/1/2, suprasternal 0/2, scalene 0/2, air_entry 0-3, wheezing 0-3; max 12",
  "max_score": 12,
  "score": 0
}

Client errors (HTTP 400)

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

HTTP	Code	When
400	`invalid_pram_item`	oxygen_sat_points 0-2, suprasternal 0 or 2, scalene 0 or 2, air_entry 0-3, and wheezing 0-3 (Chalut 2000). 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

Westley croup — Sum the Westley 1978 croup clinical score from caller-assigned consciousness, cyanosis, stridor, air entry, and retractions (maximum 17).
GOLD spirometric grade — Apply the 2017 GOLD executive summary spirometric classification: obstruction when post-bronchodilator FEV1/FVC is < 0.70, then GOLD grades 1-4 from FEV1 percent predicted.

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.