Etomidate: a foreshortened clinical trial

Area of Science:

• Anesthesiology
• Urology

Background:

• Outpatient cystoscopy requires safe and effective anesthesia.
• Etomidate is an anesthetic agent with potential applications in short procedures.

Purpose of the Study:

• To clinically evaluate the efficacy and safety of etomidate for outpatient cystoscopy.

Main Methods:

• Patients received fentanyl followed by etomidate (0.3 mg/kg) for anesthesia.
• Anesthesia was maintained with intermittent etomidate doses.
• Patients were assessed for side effects via interviews and questionnaires.

Main Results:

• The trial was discontinued after 20 cases due to high side effect rates.
• Common side effects included venous pain (68%), injection site reactions (50%), and skeletal movements (50%).
• Significant adverse events included respiratory upset (30%) and emergence psychoses (25%).

Conclusions:

• Etomidate, when combined with fentanyl for outpatient cystoscopy, resulted in an unacceptable incidence of adverse events.
• The observed side effects, including pain, injection site reactions, and respiratory compromise, limit its utility for this procedure.