This single-center prospective observational study investigates the effect of body mass index (BMI) on intraoperative vasopressor requirements and spinal block characteristics in adult patients undergoing urological surgery under spinal anesthesia. Participants are classified into two cohorts according to BMI (\<27.5 kg/m² and ≥27.5 kg/m²).Patient enrollment for this prospective observational study started before trial registration; therefore, this record represents a retrospective registration.
Who can participate
Age range
18 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Age 18 years or older
* American Society of Anesthesiologists (ASA) physical status I-II
* Scheduled for elective urologic surgery under spinal anesthesia
Exclusion Criteria:
* Refusal to participate or lack of informed consent
* Contraindications to spinal anesthesia
* Height \<150 cm or \>190 cm
* BMI \<18.5 kg/m²
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1This trial studied how body mass index affects the need for vasopressors like ephedrine during spinal anesthesia for urological surgery — if I'm having a similar procedure, how does my own BMI factor into the anesthesia plan my team would use?
2Since this trial is completed, has my doctor seen or reviewed any of its findings, and could those results influence how my anesthesia team prepares for managing my blood pressure during surgery?
3The trial focused specifically on ephedrine use during the operation — what are the risks of blood pressure dropping during spinal anesthesia for urological surgery, and how does my care team typically monitor and manage that?
4Because this was a non-phase study focused on observation and measurement rather than testing a new treatment, does it change the standard of care for how anesthesia is given to patients with different BMIs, or is this still considered investigational practice?
5Would my BMI put me in a category where the anesthesia team might need to make specific adjustments, and is there anything I should discuss beforehand about my weight and how it could affect my procedure?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Intraoperative ephedrine consumption (mg)
Timeframe: From spinal anesthesia induction until completion of surgery.