Comparison of Propofol-ketamine and Propofol-fentanyl Sedation in Short-term Gynecological Cases

Procedural sedation is widely used in various medical procedures worldwide, aiming to suppress consciousness adequately and provide sufficient analgesia while preserving the patient's cardiorespiratory function during painful or unpleasant interventions (1,2). Many drugs are used alone or in combination for this purpose (e.g., benzodiazepines, opioids such as fentanyl and remifentanil, midazolam, ketamine, propofol, dexmedetomidine) (6). This prospective, randomized, double-blind study will evaluate the effectiveness of ketamine-propofol and fentanyl-propofol combinations during short-term gynecological procedures by comparing the frequency of lower extremity movements in sedated patients.

Participants eligible for the study will include individuals aged 18-65 with American Society of Anesthesiologists (ASA) physical status I or II undergoing short gynecological procedures lasting less than 30 minutes. Participants with allergies to study medications, obesity, or behavioral disorders will be excluded. All participants will provide written informed consent the day before the procedure.

Enrolled participants will be divided into two groups: Group K, receiving ketamine and propofol, and Group F, receiving fentanyl and propofol. Heart rate (HR), arterial blood pressure (ABP), peripheral oxygen saturation (SpO2), Ramsey Sedation Score( 1: Awake; agitated or restless or both, 2: Awake; cooperative, oriented, and tranquil,3: Awake but responds to commands only, 4: Asleep; brisk response to light glabellar tap or loud auditory stimulus,5: Asleep; sluggish response to light glabellar tap or loud auditory stimulus, 6: Asleep; no response to glabellar tap or loud auditory stimulus)( RSS), and Facial Pain Score(0:No hurt- 10:Hurts worst (FPS) will be evaluated at five time points: T1 (pre-induction), T2 (1 minute post-induction), T3 (3 minutes post-induction), T4 (end of surgery), and T5 (30 minutes postoperatively).

) In Group K, ketamine-propofol will be prepared in a 1:1 ratio (both 10 mg/mL) in the same syringe, while in Group F, fentanyl (1-2 mcg/kg) and propofol (1 mg/kg) will be prepared separately. Sedation will be initiated with 0.2 mL/kg of ketofol. Surgery will commence if RSS > 4; if the desired sedation level is not achieved, a rescue dose of 0.5 mg/kg propofol bolus will be administered.