# Michigan PICC Risk Score (Chopra 2017)

> Michigan PICC Risk Score (Chopra 2017) is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Calculates the Chopra 2017 Michigan Risk Score for PICC-associated thrombosis and returns a risk class (I–IV) with observed thrombosis rates

## Facts

- Endpoint: GET https://api.magentlab.com/api/calc/michigan_picc
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/michigan-picc-risk-score-chopra-2017-66a1174e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xViXGCxKiZoMf8BOqWDJy

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability michigan-picc-risk-score-chopra-2017-66a1174e
```

Example prompt: Calculate the Michigan PICC thrombosis risk score for a patient with a double-lumen PICC, no other CVC, active cancer, a WBC of 14.2 x10^9/L, and a remote VTE history beyond 30 days.

## When to prefer this

Use this endpoint when you need to apply the validated Chopra 2017 Michigan Risk Score specifically for PICC-associated venous thrombosis; it is not a generic VTE risk calculator and does not apply to other catheter types. Prefer it over manual calculation to ensure exact published scoring logic (e.g. WBC >12.0 not ≥12.0, vte_history as a single 3-tier field rather than additive remote+recent).

## Known failure modes

- Missing required fields (other_cvc, active_cancer, picc_lumens, vte_history) returns a validation error
- WBC provided outside accepted range (0.01–500 for wbc_k_ul or 10–500,000 for wbc_ul) may return an error or be rejected
- Providing both wbc_k_ul and wbc_ul simultaneously may cause ambiguity; only one should be supplied
- Invalid enum values for picc_lumens or vte_history return a schema validation error
- Payment failure (x402 protocol) prevents the call from completing

## How this service works

Chopra 2017 Michigan Risk Score for PICC-associated thrombosis: another CVC at PICC placement 1, WBC >12 x10^9/L 1 (12.0 does not score), active cancer 2, PICC lumens single 0 / double 2 / triple 3 (triple includes quad), VTE history never 0 / remote 2 / within 30 days 3 (one field; do not add remote and recent). Max 10. Classes I=0 (observed 0.9%), II=1-2 (1.6%), III=3-4 (2.7%), IV=>4 (4.7% Table 4). Not a PICC order. magent does not count lumens.

## Output

Returns a numeric Michigan Risk Score (0–10), the corresponding risk class (I=0, II=1–2, III=3–4, IV=>4), and the published observed PICC-associated thrombosis rate for that class (0.9%, 1.6%, 2.7%, or 4.7%)

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "headers": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    },
    "queryParams": {
     "type": "object",
     "required": [
      "other_cvc",
      "active_cancer",
      "picc_lumens",
      "vte_history"
     ],
     "properties": {
      "wbc_ul": {
       "type": "number",
       "description": "WBC in cells/µL (same as cells/mm^3) at PICC insertion. Provide wbc_k_ul or wbc_ul. Range 10-500000. >12000 scores 1 (12000 does not; 12001 does)."
      },
      "wbc_k_ul": {
       "type": "number",
       "description": "WBC in 10^3/µL (same as 10^9/L) at PICC insertion. Provide wbc_k_ul or wbc_ul. Range 0.01-500. >12 scores 1 (12.0 does not)."
      },
      "other_cvc": {
       "type": "boolean",
       "description": "Another CVC present when the index PICC is placed, as assigned by the caller (Chopra 2017). true or false. true scores 1. magent does not count catheters."
      },
      "picc_lumens": {
       "enum": [
        "single",
        "double",
        "triple"
       ],
       "type": "string",
       "description": "PICC lumen count as assigned by the caller (Chopra 2017). single scores 0; double scores 2; triple scores 3. triple includes quad as published. magent does not count lumens."
      },
      "vte_history": {
       "enum": [
        "never",
        "remote",
        "within_30_days"
       ],
       "type": "string",
       "description": "One 3-tier VTE history field (Chopra 2017). never scores 0; remote (prior VTE beyond 30 days) scores 2; within_30_days scores 3. Do not add remote and recent."
      },
      "active_cancer": {
       "type": "boolean",
       "description": "Active cancer as assigned by the caller (Chopra 2017). true or false. true scores 2."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/michigan-picc-risk-score-chopra-2017-66a1174e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.magentlab.com](https://www.zero.xyz/host/api.magentlab.com/llms.txt)