# Subaxial Cervical Spine Injury Classification (SLICS)

SLICS

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

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

## What it computes

Sum the Vaccaro 2007 Subaxial Cervical Spine Injury Classification (SLICS) score from caller-assigned injury morphology, disco-ligamentous complex integrity, neurologic status, and continuous cord compression, and return the published 0–10 total and treatment-guidance band.

## When to use

When an agent has already assigned the single most severe traumatic subaxial cervical morphology, DLC status, neurologic status, and whether continuous cord compression is present with a deficit, and needs the published SLICS integer and band (0–3 / 4 / ≥5), not a surgical order, TLICS, AO spine class, or SINS neoplastic score.

## When not to use

- Not a medical device. magent does not read imaging or examine the patient. Morphology, DLC, neurologic status, and continuous cord compression are caller-assigned.
- Not a surgical order. Bands 0–3, 4, and ≥5 follow Vaccaro 2007 treatment guidance; they are not an operative command.
- Not TLICS (thoracolumbar; PLC 0/2/3). This tool is Vaccaro 2007 SLICS for subaxial cervical injury only.
- Not AO spine classification. Caller assigns the single most severe morphology (burst already includes compression; do not sum morphologies).
- Not SINS (neoplastic). magent does not read imaging.

## Formula

```
SLICS = morphology (none 0, compression 1, burst 2, distraction 3, rotation_translation 4) + dlc (intact 0, indeterminate 1, disrupted 2) + neuro (intact 0, root 1, complete 2, incomplete 3) + continuous_cord_compression (+1 only when neuro is not intact); Vaccaro 2007; max 10; caller assigns the single most severe morphology; bands 0-3 / 4 / ge_5
```

## Citation

[The subaxial cervical spine injury classification system: a novel approach to recognize the importance of morphology, neurology, and integrity of the disco-ligamentous complex.](https://doi.org/10.1097/brs.0b013e3181557b92)
Vaccaro AR, Hulbert RJ, Patel AA, et al.
Spine (Phila Pa 1976). 2007;32(21):2365-2374
DOI: [10.1097/brs.0b013e3181557b92](https://doi.org/10.1097/brs.0b013e3181557b92)

## Worked example

### No injury morphology, intact DLC, intact neurology

Given: `continuous_cord_compression=false, dlc=intact, morphology=none, neuro=intact`

1. none → 0; intact DLC → 0; intact neuro → 0; continuous_cord_compression false → 0
2. Score = 0 (max 10); slics_band 0-3


### Compression, disrupted DLC, root injury

Given: `continuous_cord_compression=false, dlc=disrupted, morphology=compression, neuro=root`

1. compression → 1; disrupted DLC → 2; root → 1; continuous_cord_compression false → 0
2. Score = 4 (max 10); slics_band 4


### Rotation/translation, disrupted DLC, incomplete cord, compression

Given: `continuous_cord_compression=true, dlc=disrupted, morphology=rotation_translation, neuro=incomplete`

1. rotation_translation → 4; disrupted DLC → 2; incomplete → 3; continuous_cord_compression true → 1
2. Score = 10 (max 10); slics_band ge_5


## Also searched as

- SLICS
- subaxial cervical spine injury classification
- Vaccaro SLICS
- SLICS score
- cervical SLICS
- disco-ligamentous complex
- Spine Trauma Study Group SLICS
- SLICS morphology DLC neurology

## Parameters

- `morphology` (string, required): Caller-assigned single most severe injury morphology (Vaccaro 2007). none scores 0; compression scores 1; burst scores 2; distraction scores 3; rotation_translation scores 4. Burst already includes compression; do not sum morphologies. magent does not read imaging.
- `dlc` (string, required): Caller-assigned disco-ligamentous complex integrity (Vaccaro 2007). intact scores 0; indeterminate scores 1; disrupted scores 2. Not TLICS PLC (0/2/3). magent does not examine the patient or read imaging.
- `neuro` (string, required): Caller-assigned neurologic status (Vaccaro 2007). intact scores 0; root scores 1; complete scores 2; incomplete scores 3. magent does not examine the patient.
- `continuous_cord_compression` (boolean, required): Adds 1 only when neuro is not intact (Vaccaro 2007). Must be false when neuro is intact. true or false. magent does not read imaging.

## 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/slics`
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": [
    {
      "continuous_cord_compression": "false",
      "dlc": "intact",
      "morphology": "none",
      "neuro": "intact"
    },
    {
      "continuous_cord_compression": "false",
      "dlc": "intact",
      "morphology": "none",
      "neuro": "intact"
    }
  ]
}
```

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

Example 200:

```json
{
  "count": 2,
  "path": "/api/calc/slics",
  "items": [
    {
      "components": [
        {
          "value": "none",
          "factor": "morphology",
          "points": 0,
          "present": true
        },
        {
          "value": "intact",
          "factor": "dlc",
          "points": 0,
          "present": true
        },
        {
          "value": "intact",
          "factor": "neuro",
          "points": 0,
          "present": true
        },
        {
          "factor": "continuous_cord_compression",
          "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": "Vaccaro AR, Hulbert RJ, Patel AA, et al.",
        "doi": "10.1097/brs.0b013e3181557b92",
        "id": "vaccaro-2007",
        "pmid": "17906580",
        "source": "Spine (Phila Pa 1976). 2007;32(21):2365-2374",
        "title": "The subaxial cervical spine injury classification system: a novel approach to recognize the importance of morphology, neurology, and integrity of the disco-ligamentous complex."
      },
      "formula": "slics",
      "formula_expression": "SLICS = morphology (none 0, compression 1, burst 2, distraction 3, rotation_translation 4) + dlc (intact 0, indeterminate 1, disrupted 2) + neuro (intact 0, root 1, complete 2, incomplete 3) + continuous_cord_compression (+1 only when neuro is not intact); Vaccaro 2007; max 10; caller assigns the single most severe morphology; bands 0-3 / 4 / ge_5",
      "max_score": 10,
      "score": 0,
      "slics_band": "0-3"
    },
    {
      "components": [
        {
          "value": "none",
          "factor": "morphology",
          "points": 0,
          "present": true
        },
        {
          "value": "intact",
          "factor": "dlc",
          "points": 0,
          "present": true
        },
        {
          "value": "intact",
          "factor": "neuro",
          "points": 0,
          "present": true
        },
        {
          "factor": "continuous_cord_compression",
          "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": "Vaccaro AR, Hulbert RJ, Patel AA, et al.",
        "doi": "10.1097/brs.0b013e3181557b92",
        "id": "vaccaro-2007",
        "pmid": "17906580",
        "source": "Spine (Phila Pa 1976). 2007;32(21):2365-2374",
        "title": "The subaxial cervical spine injury classification system: a novel approach to recognize the importance of morphology, neurology, and integrity of the disco-ligamentous complex."
      },
      "formula": "slics",
      "formula_expression": "SLICS = morphology (none 0, compression 1, burst 2, distraction 3, rotation_translation 4) + dlc (intact 0, indeterminate 1, disrupted 2) + neuro (intact 0, root 1, complete 2, incomplete 3) + continuous_cord_compression (+1 only when neuro is not intact); Vaccaro 2007; max 10; caller assigns the single most severe morphology; bands 0-3 / 4 / ge_5",
      "max_score": 10,
      "score": 0,
      "slics_band": "0-3"
    }
  ]
}
```

## Response fields

- `formula` (string): slics
- `formula_expression` (string): Exact expression used
- `score` (integer): Vaccaro 2007 SLICS total 0-10
- `max_score` (integer): 10
- `slics_band` (string): Vaccaro 2007 treatment-guidance band: 0-3, 4, or ge_5 (>=5). Not a surgical order.
- `components` (array): Per-factor Vaccaro 2007 points
- `citation` (object): Vaccaro et al. Spine 2007 citation
- `disclaimer` (string): Not-a-device notice

## Example JSON

Frozen fixture. Not a live lookup.

```json
{
  "components": [
    {
      "value": "none",
      "factor": "morphology",
      "points": 0,
      "present": true
    },
    {
      "value": "intact",
      "factor": "dlc",
      "points": 0,
      "present": true
    },
    {
      "value": "intact",
      "factor": "neuro",
      "points": 0,
      "present": true
    },
    {
      "factor": "continuous_cord_compression",
      "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": "Vaccaro AR, Hulbert RJ, Patel AA, et al.",
    "doi": "10.1097/brs.0b013e3181557b92",
    "id": "vaccaro-2007",
    "pmid": "17906580",
    "source": "Spine (Phila Pa 1976). 2007;32(21):2365-2374",
    "title": "The subaxial cervical spine injury classification system: a novel approach to recognize the importance of morphology, neurology, and integrity of the disco-ligamentous complex."
  },
  "formula": "slics",
  "formula_expression": "SLICS = morphology (none 0, compression 1, burst 2, distraction 3, rotation_translation 4) + dlc (intact 0, indeterminate 1, disrupted 2) + neuro (intact 0, root 1, complete 2, incomplete 3) + continuous_cord_compression (+1 only when neuro is not intact); Vaccaro 2007; max 10; caller assigns the single most severe morphology; bands 0-3 / 4 / ge_5",
  "max_score": 10,
  "score": 0,
  "slics_band": "0-3"
}
```

## Errors

- HTTP 400 `invalid_slics`: morphology must be none, compression, burst, distraction, or rotation_translation; dlc must be intact, indeterminate, or disrupted; neuro must be intact, root, complete, or incomplete; continuous_cord_compression must be true or false and may be true only when neuro is not intact (Vaccaro 2007 SLICS). 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

- [TLICS](https://magentlab.com/docs/tlics) — Sum the Vaccaro 2005 Thoracolumbar Injury Classification and Severity (TLICS) score from caller-assigned injury morphology, posterior ligamentous complex integrity, and neurologic status, and return the published 0–10 total and treatment-guidance band.
- [NEXUS C-spine](https://magentlab.com/docs/nexus) — Apply the Hoffman 2000 NEXUS C-spine rule and return whether the five low-risk criteria all hold (imaging not indicated by this rule).

## 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.