# AI 未标记 eGFR <30 mL/min/1.73m² 患者接受 CT 碘造影剂时的造影剂肾病风险，且未安排预防措施

- **ID:** `medical/ct-contrast-renal-function-check-skip`
- **领域:** medical
- **类别:** config_error
- **错误码:** `MED-CT-CIN-001`
- **验证级别:** ai_generated
- **修复率:** 80%

## 根因

造影剂肾病 (CIN) 在晚期 CKD (eGFR <30) 中已知风险。指南要求停用二甲双胍、使用等渗造影剂并考虑静脉水化预防，但 AI 医嘱集常缺乏造影剂开具前的 eGFR 自动检查。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| Radimetrics 2.4 | active | — | — |
| PACS GE Centricity 6.0 | active | — | — |
| Nuance mPower 2.0.1 | active | — | — |

## 解决方案

1. ```
   Implement automated eGFR check at order entry: IF eGFR < 30 THEN display alert: 'eGFR <30: CIN risk. Consider iso-osmolar contrast, IV hydration (0.9% NaCl 1 mL/kg/h for 12h pre/post), hold metformin for 48h.' Require radiologist override with reason.
   ```
2. ```
   Add a mandatory order set: 'CIN Prophylaxis for eGFR <30' that auto-selects iodixanol, IV fluids, and holds metformin. Example HL7 message: ORC|NW|12345||^CIN_PROPHYLAXIS_ORDER_SET
   ```

## 无效尝试

- **Use low-osmolar contrast instead of iso-osmolar for all patients to save cost** — Low-osmolar agents have higher CIN risk in eGFR <30 compared to iso-osmolar agents like iodixanol (60% 失败率)
- **Check only serum creatinine, ignore eGFR, because creatinine is 'more accurate'** — Serum creatinine alone is misleading in elderly, low muscle mass, or liver disease patients; eGFR is the standard for CIN risk stratification (75% 失败率)
- **Order CT without contrast if eGFR <30, regardless of clinical indication** — Many indications (e.g., pulmonary embolism, aortic dissection, abscess) require contrast; risk can be mitigated with hydration and iso-osmolar agent (50% 失败率)