# AI 为胰岛素泵编程的 24 小时基础率曲线忽略昼夜胰岛素敏感性，导致夜间低血糖和黎明现象高血糖

- **ID:** `medical/insulin-pump-circadian-basal-rate-miss`
- **领域:** medical
- **类别:** data_error
- **错误码:** `MED-PUMP-010`
- **验证级别:** ai_generated
- **修复率:** 78%

## 根因

昼夜胰岛素敏感性不同：清晨（黎明现象）需较高基础率，午夜至凌晨 3 点需较低基础率以防低血糖。AI 常使用平坦或形状错误的基础率曲线，忽略这些生理模式。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| Medtronic MiniMed 780G 2.0 | active | — | — |
| Tandem t:slim X2 1.5 | active | — | — |
| Insight 1.4.2 | active | — | — |

## 解决方案

1. ```
   Program a multi-step basal profile with 2-3 hour segments. Example for typical adult: 00:00-03:00: 0.8 U/h, 03:00-06:00: 1.0 U/h, 06:00-09:00: 1.3 U/h, 09:00-12:00: 1.1 U/h, 12:00-18:00: 1.0 U/h, 18:00-24:00: 0.9 U/h. Then fine-tune based on CGM data over 3-5 days.
   ```
2. ```
   Use automated basal rate optimization via hybrid closed-loop algorithm (e.g., Control-IQ or SmartGuard) that adjusts basal every 5 minutes based on CGM trend. This bypasses manual profile errors.
   ```

## 无效尝试

- **Use a single flat basal rate for 24 hours to simplify programming** — Flat rate causes nocturnal hypoglycemia (too high at 2 AM) and morning hyperglycemia (too low at 6 AM) in most patients (80% 失败率)
- **Set lowest basal rate at midnight and highest at noon, following a simple sine wave** — The physiological nadir is 2-3 AM, not midnight; and peak is 6-8 AM (dawn phenomenon), not noon. A sine wave is too simplistic and mismatches real patterns (65% 失败率)
- **Use the same basal profile for all patients, adjusting only total daily dose** — Circadian patterns vary significantly between individuals; a one-size-fits-all profile causes poor glycemic control (90% 失败率)