INSULIN-PRECIP-003 medical config_error ai_generated true

AI instructs a nurse to dilute insulin for IV infusion using normal saline instead of the manufacturer-recommended diluent, causing insulin precipitation

ID: medical/insulin-dilution-error

Also available as: JSON · Markdown · 中文
80%Fix Rate
85%Confidence
1Evidence
2024-03-22First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
Humulin R U-100 (Eli Lilly) prescribing info 2023 active — — —
Novolin R (Novo Nordisk) prescribing info 2023 active — — —
ISMP Guidelines for IV Insulin Infusions 2022 active — — —

Root Cause

Regular insulin (e.g., Humulin R) is compatible with 0.9% NaCl for IV infusion only at specific concentrations; using NS at high concentrations or with certain insulin analogs can cause precipitation and dosing errors.

generic

中文

常规胰岛素（如Humulin R）仅能在特定浓度下与0.9%生理盐水兼容用于静脉输注；高浓度或使用某些胰岛素类似物时会导致沉淀和剂量错误。

Official Documentation

https://pi.lilly.com/us/humulin-r-usp.pdf

Workarounds

  1. 88% success For Humulin R U-100 IV infusion, dilute 100 units (1 mL) in 100 mL of 0.9% NaCl (final concentration 1 unit/mL). Use a dedicated IV line with a 0.22-micron in-line filter. Do not use D5W or lactated Ringer's without checking compatibility. Example: 'Add 1 mL Humulin R U-100 to 100 mL 0.9% NaCl in a PVC bag.' 
    For Humulin R U-100 IV infusion, dilute 100 units (1 mL) in 100 mL of 0.9% NaCl (final concentration 1 unit/mL). Use a dedicated IV line with a 0.22-micron in-line filter. Do not use D5W or lactated Ringer's without checking compatibility. Example: 'Add 1 mL Humulin R U-100 to 100 mL 0.9% NaCl in a PVC bag.'
  2. 82% success For Novolin R, use only 0.9% NaCl for dilution at 1 unit/mL concentration. If D5W is required for other medications, use a Y-site connector with a separate insulin line. Always inspect the solution for turbidity before administration. 
    For Novolin R, use only 0.9% NaCl for dilution at 1 unit/mL concentration. If D5W is required for other medications, use a Y-site connector with a separate insulin line. Always inspect the solution for turbidity before administration.

中文步骤

  1. For Humulin R U-100 IV infusion, dilute 100 units (1 mL) in 100 mL of 0.9% NaCl (final concentration 1 unit/mL). Use a dedicated IV line with a 0.22-micron in-line filter. Do not use D5W or lactated Ringer's without checking compatibility. Example: 'Add 1 mL Humulin R U-100 to 100 mL 0.9% NaCl in a PVC bag.'
  2. For Novolin R, use only 0.9% NaCl for dilution at 1 unit/mL concentration. If D5W is required for other medications, use a Y-site connector with a separate insulin line. Always inspect the solution for turbidity before administration.

Dead Ends

Common approaches that don't work:

  1. Use 0.45% NaCl (half-normal saline) as a safer alternative for all insulin dilutions 85% fail

    Half-normal saline is not recommended for insulin dilution; it can cause hemolysis in IV lines and is not tested for insulin stability.

  2. Add albumin to the insulin infusion to prevent adsorption to the IV tubing 90% fail

    Albumin is not recommended for routine insulin infusions; it may cause foaming and inaccurate dosing, and is not approved for this use.

  3. Mix insulin directly into the IV bag without dilution 95% fail

    Direct addition without proper dilution can cause insulin aggregation and unpredictable dosing; manufacturer guidelines require specific dilution protocols.