Ketamine Dosing for Conscious Sedation During Shoulder Reduction

Recommended Dosing Protocol

The American College of Emergency Physicians recommends administering 2 mg/kg intravenous ketamine for orthopedic procedures, including shoulder reduction, which provides rapid onset of adequate sedation within 30-96 seconds and allows successful completion of the procedure in 98.9% of cases 1, 2
A standard dose of 2 mg/kg IV ketamine provides adequate sedation for fracture and joint reduction without requiring additional doses in 95% of patients 1, 3
The onset of action occurs within 30-96 seconds, allowing immediate procedural intervention 1, 3
Lower doses (1.5 mg/kg IV) may be considered, but result in 54% of patients requiring additional ketamine, compared to only 5.5% with higher dosing 1, 3
The intramuscular route (4 mg/kg IM) can be used if IV access is unavailable, though onset is slower at approximately 3-4 minutes 2

Consider adding midazolam 0.05-0.1 mg/kg IV prior to ketamine to reduce emergence reactions, particularly in adults where recovery agitation occurs in 13% of cases 2

Continuous pulse oximetry (maintain SpO2 >93% on room air) is recommended 1, 3
Heart rate and blood pressure should be monitored at regular intervals 3
Respiratory status should be monitored throughout the procedure and recovery 1, 3

Average recovery time is 84 minutes (range 22-215 minutes) from administration to discharge readiness 1, 4
Recovery time may be shorter with lower total ketamine doses 4

Avoid underdosing, as studies demonstrate that 1 mg/kg results in inadequate sedation requiring supplemental doses in over half of patients, prolonging procedure time and increasing total drug exposure 1, 3
Success rate is excellent, with adequate sedation for shoulder reduction achieved in 98.9% of cases with appropriate dosing, and all patients maintaining oxygen saturation >93% when properly monitored 1