IV-DILUTION-007 medical data_error ai_generated true

AI instructs to dilute IV vancomycin with 50mL D5W for a 1.5g dose, ignoring concentration limits for phlebitis risk

ID: medical/iv-antibiotic-dilution-error

Also available as: JSON · Markdown · 中文
90%Fix Rate
85%Confidence
1Evidence
2024-01-20First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
vancomycin 1.5g vial active — — —
D5W 250mL bag active — — —
ISMP guidelines 2023 active — — —

Root Cause

Vancomycin concentration should not exceed 5 mg/mL for peripheral IV administration; 1.5g in 50mL yields 30 mg/mL, causing high osmolarity and severe phlebitis; proper dilution requires at least 300mL.

generic

中文

万古霉素浓度在外周静脉给药时不应超过5 mg/mL；1.5g溶于50mL产生30 mg/mL，导致高渗透压和严重静脉炎；正确稀释至少需要300mL。

Official Documentation

https://www.ismp.org/resources/vancomycin-administration-guidelines

Workarounds

  1. 95% success Dilute 1.5g vancomycin in 300mL NS or D5W to achieve 5 mg/mL; use `python -c "print(f'Required volume: {1500/5} mL')"` 
    Dilute 1.5g vancomycin in 300mL NS or D5W to achieve 5 mg/mL; use `python -c "print(f'Required volume: {1500/5} mL')"`
  2. 85% success If fluid restriction needed, consider central line with concentration up to 10 mg/mL (150mL); document in EHR with pump rate calculation 
    If fluid restriction needed, consider central line with concentration up to 10 mg/mL (150mL); document in EHR with pump rate calculation
  3. 92% success Use premixed vancomycin bags (1g/200mL or 1.5g/300mL) from pharmacy to eliminate dilution errors 
    Use premixed vancomycin bags (1g/200mL or 1.5g/300mL) from pharmacy to eliminate dilution errors

中文步骤

  1. Dilute 1.5g vancomycin in 300mL NS or D5W to achieve 5 mg/mL; use `python -c "print(f'Required volume: {1500/5} mL')"`
  2. If fluid restriction needed, consider central line with concentration up to 10 mg/mL (150mL); document in EHR with pump rate calculation
  3. Use premixed vancomycin bags (1g/200mL or 1.5g/300mL) from pharmacy to eliminate dilution errors

Dead Ends

Common approaches that don't work:

  1. 70% fail

    Central line reduces phlebitis risk but does not eliminate need for proper dilution; concentrated solution still causes precipitation or red man syndrome

  2. 90% fail

    Slow infusion does not reduce osmolarity damage; phlebitis occurs due to high concentration regardless of rate

  3. 80% fail

    Volume still insufficient (1.5g/100mL = 15 mg/mL, 3x limit); NS vs D5W does not change concentration requirement