Analgesic effect of ketamine and morphine after tonsillectomy in children

Area of Science:

• Pediatric Anesthesiology
• Pain Management
• Pharmacology

Background:

• Tonsillectomy is a common pediatric surgical procedure.
• Effective pain management and minimizing side effects like respiratory depression and emesis are crucial post-tonsillectomy.
• Morphine is a standard analgesic, but its side effects can be concerning in children.

Purpose of the Study:

• To compare the analgesic efficacy, respiratory rate depressant effects, and incidence of emesis between ketamine and morphine in children following tonsillectomy.
• To evaluate pain scores using CHEOPS and face scales.
• To assess the safety profile of ketamine versus morphine in this pediatric population.

Main Methods:

• A comparative double-blind study involving eighty children (6-12 years) undergoing tonsillectomy.
• Children were randomly assigned to two groups (n=40).
• Group I received intramuscular (I/M) morphine (0.1mg/kg), and Group II received I/M ketamine (0.5mg/kg) under general anesthesia before surgery. Pain scores (CHEOPS, face) and respiratory rates were monitored post-operatively. Incidence of vomiting was recorded.

Main Results:

• CHEOPS pain scores were significantly lower in the ketamine group (Group II) compared to the morphine group (Group I) (P < 0.05).
• Analgesic effects, measured by face scores, showed no statistically significant difference between the groups (P > 0.05).
• Respiratory rate showed a statistically significant difference at 60 and 120 minutes, favoring ketamine (P < 0.05). Vomiting incidence was higher in the morphine group (P < 0.05).

Conclusions:

• Ketamine may serve as a suitable alternative to morphine for analgesia in children undergoing tonsillectomy.
• Ketamine appears to offer better pain control and fewer respiratory and emetic side effects compared to morphine in this context.
• Further research can explore optimal ketamine dosing for pediatric post-tonsillectomy pain management.