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D-FAB-POUR Trial: Dexmedetomidine vs Fentanyl as Adjuvants to Bupivacaine on Postoperative Urinary Retention
Sponsor: Tribhuvan University Teaching Hospital, Institute Of Medicine.
Summary
This study aims to compare two medications, dexmedetomidine and fentanyl, when used alongside a commonly used spinal anesthetic called bupivacaine in patients undergoing lower limb surgery. The main focus of the study is to see which combination causes fewer problems with urination after surgery - a condition known as postoperative urinary retention (POUR). POUR can lead to discomfort, delayed recovery, and a need for catheterization. Dexmedetomidine is a newer drug that may help reduce this problem compared to fentanyl, which is more commonly used but may increase the risk of urinary retention. This trial will help determine which medication combination provides better pain relief while reducing urinary side effects. The study is being conducted as a randomized, double-blind trial at a hospital in Nepal and will include 190 adult patients. \-
Official title: Comparison of Intrathecal Dexmedetomidine Versus Intrathecal Fentanyl as Adjuvants to Bupivacaine on Post-Operative Urinary Retention in Lower Limb Surgery
Key Details
Gender
All
Age Range
18 Years - 60 Years
Study Type
INTERVENTIONAL
Enrollment
190
Start Date
2025-09-15
Completion Date
2026-11-25
Last Updated
2025-08-12
Healthy Volunteers
Yes
Conditions
Interventions
Intervention 1: Intrathecal Dexmedetomidine with Bupivacaine
Intervention 1: Intrathecal Dexmedetomidine with Bupivacaine Detailed Description: This intervention consists of a single intrathecal injection of 10 micrograms of dexmedetomidine combined with 15 mg (3 mL) of 0.5% hyperbaric bupivacaine, administered during spinal anaesthesia for lower limb surgery. The total volume administered is 3.5 mL. Dexmedetomidine is an alpha-2 non-opioid adjuvant used as a spinal adjuvant for enhancing analgesia
Intervention 2: Intrathecal Fentanyl with Bupivacaine
This intervention consists of a single intrathecal injection of 25 micrograms of fentanyl combined with 15 mg (3 mL) of 0.5% hyperbaric bupivacaine, administered during spinal anesthesia for lower limb surgery. The total volume administered is 3.5 mL. Fentanyl is a lipophilic opioid commonly used as a spinal adjuvant for enhancing analgesia. This arm is being compared with dexmedetomidine to evaluate differences in POUR incidence, analgesic effectiveness, and side effect profiles.
Locations (1)
Om Sai Pathibhara Hospital
Bhadrapur, Koshi, Nepal