# AIS inhalation injury grade (Endorf 2007)

AIS inhalation

Status: LIVE
Price: $0.005 USDC
`GET /api/calc/ais_inhalation`
HTML: https://magentlab.com/docs/ais-inhalation
Markdown: https://magentlab.com/docs/ais-inhalation.md

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

## What it computes

Echo the caller-assigned Endorf 2007 bronchoscopic AIS inhalation grade (0-4) with the published description and high_grade (true when grade is 2-4). magent does not perform bronchoscopy. Not ISS body-region AIS. Not RADS CT smoke score.

## When to use

When an agent already has an Endorf 2007 bronchoscopic AIS inhalation grade as assigned by the caller and needs the published grade description and the 2-4 vs 0-1 high_grade grouping. magent does not perform bronchoscopy, grade airways from images, or take PaO2/FiO2 as an input.

## When not to use

- Not a medical device. magent does not perform bronchoscopy.
- The caller assigns ais_grade 0-4 from Endorf 2007 bronchoscopic criteria. magent does not grade airways from images or assign AIS from a chart.
- Not a diagnosis of inhalation injury. Not a treatment, intubation, or fluid-resuscitation order.
- Not the ISS body-region AIS (Baker 1974). Not RADS CT smoke score.
- Endorf 2007 found grades 2, 3, and 4 had significantly worse survival than grades 0 or 1 (P = .03). high_grade is that published grouping. magent does not invent fluid-requirement bands from P:F ratio. A separate Endorf 2007 finding associated P:F <350 vs >350 with fluid requirement; that ratio is not an input.

## Formula

```
ais_grade in {0, 1, 2, 3, 4} as assigned by the caller (Endorf 2007 bronchoscopic grading derived from AIS criteria). high_grade iff ais_grade >= 2 (grades 2, 3, and 4 had significantly worse survival than grades 0 or 1, P = .03). magent does not perform bronchoscopy. Not ISS body-region AIS. Not RADS CT smoke score.
```

## Citation

[Inhalation injury, pulmonary perturbations, and fluid resuscitation](https://doi.org/10.1097/bcr.0b013e31802c889f)
Endorf FW, Gamelli RL
J Burn Care Res. 2007;28(1):80-83
DOI: [10.1097/bcr.0b013e31802c889f](https://doi.org/10.1097/bcr.0b013e31802c889f)

## Worked example

### Grade 0 no injury

Given: `ais_grade=0`

1. ais_grade 0 as assigned by the caller
2. no injury: absence of carbonaceous deposits, erythema, edema, bronchorrhea, or obstruction
3. high_grade false (grade < 2)


### Grade 4 massive injury

Given: `ais_grade=4`

1. ais_grade 4 as assigned by the caller
2. massive: evidence of mucosal sloughing, necrosis, endoluminal obliteration (any or combination)
3. high_grade true (grade >= 2)


## Also searched as

- AIS inhalation
- AIS inhalation injury
- Abbreviated Injury Score inhalation
- Endorf inhalation grade
- bronchoscopic inhalation grade
- inhalation injury AIS
- Endorf 2007 AIS
- smoke inhalation bronchoscopy grade

## Parameters

- `ais_grade` (integer, required): Endorf 2007 bronchoscopic AIS inhalation grade 0-4 as assigned by the caller (0 no injury: absence of carbonaceous deposits, erythema, edema, bronchorrhea, or obstruction; 1 mild: minor or patchy areas of erythema, carbonaceous deposits in proximal or distal bronchi, any or combination; 2 moderate: moderate degree of erythema, carbonaceous deposits, bronchorrhea, with or without compromise of the bronchi, any or combination; 3 severe: severe inflammation with friability, copious carbonaceous deposits, bronchorrhea, bronchial obstruction, any or combination; 4 massive: evidence of mucosal sloughing, necrosis, endoluminal obliteration, any or combination). Integer 0-4 only; reject 5, 1.5, and roman I. magent does not perform bronchoscopy. Not ISS body-region AIS. Not RADS CT smoke score.

## 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.

Method: `POST /api/calc/ais_inhalation`
Max items: 25
Price: unit_amount + extra_item_amount * (n - 1) (unit 5000 atomic, extra 2000 atomic)
Status: 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:

```json
{
  "items": [
    {
      "ais_grade": "0"
    },
    {
      "ais_grade": "0"
    }
  ]
}
```

Human paywall (two-item fixture): https://api.magentlab.com/paywall/bulk/ais-inhalation

Example 200:

```json
{
  "count": 2,
  "path": "/api/calc/ais_inhalation",
  "items": [
    {
      "description": "No injury: absence of carbonaceous deposits, erythema, edema, bronchorrhea, or obstruction",
      "components": [
        {
          "factor": "grade_0",
          "met": true
        },
        {
          "factor": "grade_1",
          "met": false
        },
        {
          "factor": "grade_2",
          "met": false
        },
        {
          "factor": "grade_3",
          "met": false
        },
        {
          "factor": "grade_4",
          "met": 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": "Endorf FW, Gamelli RL",
        "doi": "10.1097/bcr.0b013e31802c889f",
        "id": "endorf-2007",
        "pmid": "17211205",
        "source": "J Burn Care Res. 2007;28(1):80-83",
        "title": "Inhalation injury, pulmonary perturbations, and fluid resuscitation"
      },
      "formula": "ais_inhalation",
      "formula_expression": "ais_grade in {0, 1, 2, 3, 4} as assigned by the caller (Endorf 2007 bronchoscopic grading derived from AIS criteria). high_grade iff ais_grade >= 2 (grades 2, 3, and 4 had significantly worse survival than grades 0 or 1, P = .03). magent does not perform bronchoscopy. Not ISS body-region AIS. Not RADS CT smoke score.",
      "ais_grade": 0,
      "high_grade": false
    },
    {
      "description": "No injury: absence of carbonaceous deposits, erythema, edema, bronchorrhea, or obstruction",
      "components": [
        {
          "factor": "grade_0",
          "met": true
        },
        {
          "factor": "grade_1",
          "met": false
        },
        {
          "factor": "grade_2",
          "met": false
        },
        {
          "factor": "grade_3",
          "met": false
        },
        {
          "factor": "grade_4",
          "met": 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": "Endorf FW, Gamelli RL",
        "doi": "10.1097/bcr.0b013e31802c889f",
        "id": "endorf-2007",
        "pmid": "17211205",
        "source": "J Burn Care Res. 2007;28(1):80-83",
        "title": "Inhalation injury, pulmonary perturbations, and fluid resuscitation"
      },
      "formula": "ais_inhalation",
      "formula_expression": "ais_grade in {0, 1, 2, 3, 4} as assigned by the caller (Endorf 2007 bronchoscopic grading derived from AIS criteria). high_grade iff ais_grade >= 2 (grades 2, 3, and 4 had significantly worse survival than grades 0 or 1, P = .03). magent does not perform bronchoscopy. Not ISS body-region AIS. Not RADS CT smoke score.",
      "ais_grade": 0,
      "high_grade": false
    }
  ]
}
```

## Response fields

- `formula` (string): ais_inhalation
- `formula_expression` (string): Published Endorf 2007 bronchoscopic AIS inhalation-grade rule
- `ais_grade` (integer): Caller-assigned Endorf 2007 bronchoscopic AIS inhalation grade 0-4
- `description` (string): Endorf 2007 bronchoscopic wording for that grade
- `high_grade` (boolean): true iff ais_grade >= 2 (Endorf 2007: grades 2, 3, and 4 had significantly worse survival than grades 0 or 1, P = .03)
- `components` (array): Per-grade Tree rows grade_0, grade_1, grade_2, grade_3, grade_4 with factor and met; exactly one is met
- `citation` (object): Endorf 2007 J Burn Care Res citation
- `disclaimer` (string): Not-a-device notice

## Example JSON

Frozen fixture. Not a live lookup.

```json
{
  "description": "No injury: absence of carbonaceous deposits, erythema, edema, bronchorrhea, or obstruction",
  "components": [
    {
      "factor": "grade_0",
      "met": true
    },
    {
      "factor": "grade_1",
      "met": false
    },
    {
      "factor": "grade_2",
      "met": false
    },
    {
      "factor": "grade_3",
      "met": false
    },
    {
      "factor": "grade_4",
      "met": 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": "Endorf FW, Gamelli RL",
    "doi": "10.1097/bcr.0b013e31802c889f",
    "id": "endorf-2007",
    "pmid": "17211205",
    "source": "J Burn Care Res. 2007;28(1):80-83",
    "title": "Inhalation injury, pulmonary perturbations, and fluid resuscitation"
  },
  "formula": "ais_inhalation",
  "formula_expression": "ais_grade in {0, 1, 2, 3, 4} as assigned by the caller (Endorf 2007 bronchoscopic grading derived from AIS criteria). high_grade iff ais_grade >= 2 (grades 2, 3, and 4 had significantly worse survival than grades 0 or 1, P = .03). magent does not perform bronchoscopy. Not ISS body-region AIS. Not RADS CT smoke score.",
  "ais_grade": 0,
  "high_grade": false
}
```

## Errors

- HTTP 400 `invalid_ais_inhalation`: AIS inhalation needs ais_grade 0-4 as assigned from Endorf 2007 bronchoscopic criteria. Returned before settlement; you are not charged.
- HTTP 400 `invalid_items`: POST body must be a JSON object with only an items array Returned before settlement; you are not charged.
- HTTP 400 `invalid_item_count`: items must be an array of 1 to 25 objects Returned before settlement; you are not charged.
- HTTP 400 `invalid_item`: each items entry must be a JSON object Returned before settlement; you are not charged.

Shared HTTP 402 and 503: https://magentlab.com/docs/payments

## Related tools

- [ISS](https://magentlab.com/docs/iss) — Compute the Baker 1974 Injury Severity Score as the sum of squares of the three highest caller-assigned AIS body-region grades, or 75 if any region is AIS 6.
- [Parkland formula](https://magentlab.com/docs/parkland) — Compute adult Parkland 24-hour crystalloid volume from weight and percent TBSA, with half allotted to the first 8 hours from the time of burn.

## 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.

- GET the tool with Accept: application/json (do not send Accept: text/html unless you want the human paywall).
- HTTP 402 means you have not paid. Decode the base64 PAYMENT-REQUIRED header. HTTP 503 is not a new quote.
- Sign accepts[0] (exact, EIP-3009) with validBefore = now + maxTimeoutSeconds (600 seconds), or accepts[1] (batch-settlement deposit/voucher) on product GET. Ping and POST {items} stay exact. Magent retries transient facilitator 429/5xx before answering.
- Retry the same URL with PAYMENT-SIGNATURE (base64 JSON of accepted and payload). Magent attaches canonical extensions.bazaar on CDP verify/settle; echoing 402 bazaar is optional.
- Success is HTTP 200 JSON plus PAYMENT-RESPONSE. exact settles before the tool. batch-settlement verifies (and deposit-settles) before the tool and commits the charge after HTTP 2xx. HTTP 503: retry the same PAYMENT-SIGNATURE. Mint a new exact nonce only after a new HTTP 402.

- offered `exact` on eip155:8453: Fixed-price USDC on Base. The buyer authorizes the advertised amount (EIP-3009). magent settles before the tool runs (paymentFlow upfront). extra.assetTransferMethod=eip3009 extra.paymentFlow=upfront.
- offered `batch-settlement` on eip155:8453: Payment-channel vouchers claimed later in batches. Exact stays accepts[0]. Same-path POST {items} is still exact. extra.assetTransferMethod=eip3009 extra.paymentFlow=authorization.

- not offered `upto`: Not offered. Usage-based: buyer authorizes a ceiling, seller settles the actual amount after work. Reserved for a future metered tool. Not for current calculators or code search.

Same-path POST {items} is still scheme exact: one EIP-3009 authorization for GET unit plus $0.002 per extra item. That is not x402 batch-settlement (payment channels / vouchers).

Shared HTTP 402 and 503 table: https://magentlab.com/docs/payments

Stdio MCP (one process per host): https://magentlab.com/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.