# AI指示在同一个注射器中混合NPH和常规胰岛素时先抽取NPH，导致常规胰岛素瓶被鱼精蛋白污染

- **ID:** `medical/insulin-mixing-nph-regular`
- **领域:** medical
- **类别:** runtime_error
- **错误码:** `INSULIN-MIX-ORDER-ERR-004`
- **验证级别:** ai_generated
- **修复率:** 92%

## 根因

在同一注射器中混合NPH（浑浊）和常规胰岛素（澄清）时，必须先抽取常规胰岛素，以避免常规胰岛素瓶被鱼精蛋白污染（鱼精蛋白会将常规胰岛素转化为NPH，改变其作用时间曲线，导致不可预测的血糖控制）。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| ADA Standards of Medical Care in Diabetes 2024 | active | — | — |
| Lilly Humulin R/NPH Prescribing Information 2023 | active | — | — |
| ISMP Guidelines for Insulin Administration 2023 | active | — | — |

## 解决方案

1. ```
   Correct mixing protocol: 1) Inject air into regular insulin vial (clear) and withdraw dose. 2) Inject air into NPH vial (cloudy) and gently roll to resuspend. 3) Withdraw NPH dose. 4) Administer immediately. Verify with: `echo "Order: Regular (clear) first, then NPH (cloudy)" && read -p "Did you draw regular first? (y/n): " ans && [ "$ans" = "y" ] || echo "ERROR: Discard and restart"`
   ```
2. ```
   Use separate syringes and inject both insulins subcutaneously at the same site (within 5 cm) to avoid mixing in vial. This eliminates contamination risk. Document: `Regular insulin 10 units SC + NPH 20 units SC, separate syringes, same abdominal site.`
   ```

## 无效尝试

- **** — Drawing NPH first because 'it's easier to see the cloudy insulin' — protamine from NPH will contaminate the regular insulin vial, altering its action for all future doses (80% 失败率)
- **** — Using a single syringe to mix without rolling NPH gently — rolling is required to resuspend NPH, otherwise the dose is inaccurate (60% 失败率)
- **** — Injecting air into NPH vial first (as with regular insulin) — NPH can be aerated, but the order of air injection does not matter; the critical step is the order of drawing liquid (40% 失败率)