Propofol Dose-Finding for Colonoscope Insertion in Geriatric Patients
Summary
The aim of this prospective dose-finding study is to determine the ED50 of propofol required for successful colonoscope insertion in geriatric patients. The study is designed using Dixon's up-and-down sequential allocation method. Successful colonoscope insertion is defined as the absence of pain, movement, or vocal response, together with a MOAA/S score ≤2 at the second minute after induction, and maintained until the colonoscope pass the rectosigmoid junction. In cases of failure, an additional dose of propofol is administered, and the initial dose for the next patient was increased by 0.1 mg/kg. In cases of success, the initial dose for the next patient was decreased by 0.1 mg/kg. The primary outcome is the determination of the ED50 of propofol for successful colonoscope insertion until passage of the rectosigmoid junction.
Timeline
- Start
- 2025-09-08
- Primary completion
- 2025-10-08
- Completion
- 2025-10-08
Drugs
| Evaluation | Drug | Modality | Dose | Route |
|---|---|---|---|---|
| Subject | Propofol | Small molecule | 1.5 mg/kg | Intravenous |
Indications
No indication recorded.