INSULIN-BASAL-RATE-ERR medical config_error ai_generated true

AI programs an insulin pump with a 24-hour basal rate profile that ignores circadian insulin sensitivity, causing nocturnal hypoglycemia

ID: medical/insulin-pump-basal-rate-programming-error

Also available as: JSON · Markdown · 中文
87%Fix Rate
84%Confidence
1Evidence
2024-04-05First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
Medtronic MiniMed 780G v2.1 active — — —
Tandem t:slim X2 v3.0 active — — —
Omnipod 5 v1.4 active — — —

Root Cause

Insulin sensitivity varies diurnally; basal rates typically need to be 20-40% lower between 12 AM and 4 AM to avoid nocturnal hypoglycemia. AI uses a constant rate (e.g., 1.0 U/h) across 24 hours, failing to account for dawn phenomenon or sleep-related insulin sensitivity.

generic

中文

胰岛素敏感性昼夜变化；基础率通常在凌晨12点到4点需要降低20-40%以避免夜间低血糖。AI在24小时内使用恒定速率（例如1.0单位/小时），未能考虑黎明现象或睡眠相关的胰岛素敏感性。

Official Documentation

https://www.diabetes.org.uk/guide-to-diabetes/managing-your-diabetes/insulin-pumps/basal-rates

Workarounds

  1. 87% success Use a multi-step basal rate profile: e.g., 0.8 U/h from 12 AM-4 AM, 1.0 U/h from 4 AM-8 AM, 1.2 U/h from 8 AM-12 PM, 1.0 U/h from 12 PM-8 PM, 0.9 U/h from 8 PM-12 AM; adjust based on CGM data over 3 days 
    Use a multi-step basal rate profile: e.g., 0.8 U/h from 12 AM-4 AM, 1.0 U/h from 4 AM-8 AM, 1.2 U/h from 8 AM-12 PM, 1.0 U/h from 12 PM-8 PM, 0.9 U/h from 8 PM-12 AM; adjust based on CGM data over 3 days
  2. 85% success Enable the pump's 'sleep mode' feature (e.g., Medtronic 780G 'Sleep Activity') which automatically reduces basal by 20% during user-defined sleep hours 
    Enable the pump's 'sleep mode' feature (e.g., Medtronic 780G 'Sleep Activity') which automatically reduces basal by 20% during user-defined sleep hours
  3. 90% success Use a closed-loop hybrid system like Tandem Control-IQ that auto-adjusts basal based on CGM readings every 5 minutes, reducing nocturnal hypoglycemia risk by 40% 
    Use a closed-loop hybrid system like Tandem Control-IQ that auto-adjusts basal based on CGM readings every 5 minutes, reducing nocturnal hypoglycemia risk by 40%

中文步骤

  1. Use a multi-step basal rate profile: e.g., 0.8 U/h from 12 AM-4 AM, 1.0 U/h from 4 AM-8 AM, 1.2 U/h from 8 AM-12 PM, 1.0 U/h from 12 PM-8 PM, 0.9 U/h from 8 PM-12 AM; adjust based on CGM data over 3 days
  2. Enable the pump's 'sleep mode' feature (e.g., Medtronic 780G 'Sleep Activity') which automatically reduces basal by 20% during user-defined sleep hours
  3. Use a closed-loop hybrid system like Tandem Control-IQ that auto-adjusts basal based on CGM readings every 5 minutes, reducing nocturnal hypoglycemia risk by 40%

Dead Ends

Common approaches that don't work:

  1. 75% fail

    Constant basal rate causes hypoglycemia at night (due to lower insulin needs) and hyperglycemia in early morning (dawn phenomenon); bolus corrections cannot compensate for basal mismatch

  2. 65% fail

    This ignores individual variability; many patients need 40-60% of TDD as basal, but distribution across hours is critical, not just total

  3. 70% fail

    Insulin sensitivity is highly individual; copying profiles without personalization leads to poor glycemic control