Ultrasound-guided versus neurostimulation-guided bilateral transperineal pudendal nerve block for analgesia in outpatient haemorrhoid surgery: protocol for a multicentre, randomised, double-blind, non-inferiority trial
Study context
- Population
- Patients undergoing outpatient haemorrhoid surgery202 planned
- Planned comparison
- Ultrasound-guided vs Nerve stimulator-guided
- Primary endpoint
- Maximum pain score (0-10 NRS) in the PACU
Methodological detailsmulticentre, prospective, double-blind, non-inferiority, Recruitment expected to begin September 2025, Planned sample: 202 patients to test non-inferiority (margin 0.7), Secondary outcomes: PACU and hospital LOS, QoR-15, pain and analgesic consumption during first 7 days, treatment-related adverse effects and safety
- Multicentre
- Prospective
- Double-blind
- Non-inferiority
- Recruitment expected to begin September 2025
- Planned sample: 202 patients to test non-inferiority (margin 0.7)
- Secondary outcomes: PACU and hospital LOS, QoR-15, pain and analgesic consumption during first 7 days, treatment-related adverse effects and safety
No results yet. This paper sets out the design of a trial; its results are to come.
Original publication
Ultrasound-guided versus neurostimulation-guided bilateral transperineal pudendal nerve block for analgesia in outpatient haemorrhoid surgery: protocol for a multicentre, randomised, double-blind, non-inferiority trial. BJA Open. Published 9 December 2025. doi:10.
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