About this trial
Most minor perianal surgeries are performed as day-case procedures requiring rapid recovery and effective symptom control. Saddle block anesthesia (SBA) provides reliable perineal anesthesia with minimal hemodynamic and motor effects, promoting faster recovery than general anesthesia. However, the duration of sitting after intrathecal injection influences anesthetic spread, and the optimal sitting time to balance adequate anesthesia with early discharge remains unclear.
Eligibility criteria
Qualifiers
Adult patients (21-65 years), ASA I-III undergoing perianal surgery.
Disqualifiers
Severe cardiac morbidities (impaired contractility with ejection fraction < 40%, heart block, arrhythmias, tight valvular lesions)
Contraindication to neuraxial anesthesia such as coagulopathy and local infection
Pregnant or lactating women,
Allergy of any of the study drugs
Trial design
Treatments tested in this trial
- 5-min sitting duration after SBA
- 8-min sitting duration after SBA