Low Dose Spinal Bupivacaine Decrease Incidence of Postoprative Urinary Retention in Anorectal Surgery

Status

Active, not recruiting

Phases

Phase 2

Study type

Interventional

Source

TCTR

Registry ID

TCTR20150629005

Enrollment

Registered

2015-06-29

Start date

2015-06-30

Completion date

Unknown

Last updated

2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

urinary retention urinary retention spinal anesthesia low dose bupivacaine anorectal surgery hemorrhoidectomy fistulectomy sphincterectomy

Interventions

spinal anesthesia with 0.5%bupivacaine (Heavy Marcaine) 0.6ml (3mg) in sitting position for 5 minute,spinal anesthesia with 0.5%bupivacaine (Heavy Marcaine) 1.2ml (6mg) in sitting position for 5 minut

Active Comparator Drug,Active Comparator Drug

low dose spinal bupivacaine,conventional dose spinal bupivacaine

Eligibility

Sex/Gender

All

Age

18 Years to 70 Years

Inclusion criteria

Inclusion criteria: anorectal surgery spinal anesthesia informed consent

Exclusion criteria

Exclusion criteria: predisposing urinary symptom benign prostate hypertrophy diabetes mellitus contraindication for parecoxib and etoricoxib refuse to participate

Design outcomes

Primary

Measure	Time frame
postoperative urinary retention 24 hours need for urinary catheterization	—

Secondary

Measure	Time frame
adequacy of anesthesia intraoperative need for other rescue drug	—

Countries

Thailand

Contacts

Public ContactThanyalak Thamjamrassri

Ramathibodi hospital

pika_joy@hotmail.com6622011513

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026