The aim of the current study is to compare the analgesic effects of both drugs in patients with obesity undergoing bariatric surgery.
Upon arrival to the operating room, routine monitors (electrocardiogram, pulse oximetry, and non-invasive blood pressure monitor) will be applied; intravenous line will be secured, and prophylactic antiemetic will be provided in the form of slow intravenous injection of 5 mg dexamethasone drugs. Anesthesia Anesthesia will be induced with 2 mg/kg propofol, 2 mcg/kg fentanyl (lean body weight), and tracheal intubation will be facilitated by 0.6 mg/kg ideal body weight rocuronium after loss of consciousness. Anesthesia will be maintained with isoflurane 1-1.2% in oxygen and 0.1 mg/kg rocuronium every 30 minutes. Fentanyl boluses of 1 mcg/kg will be given if heart rate or/and systolic blood pressure \>120% of baseline. Postoperatively, pain assessments using the visual analogue scale (VAS) will be performed at rest and during movement (knee flexion) at 0.5, 4, 10, 18, and 24 h after leaving the operating room. If the VAS score is \> 3 intravenous nalbuphine 0.1-0.2 mg/kg (lean body weight) titrated to response with maximum single dose of 20 mg and maximum daily dose of 160 mg. Intravenous ondansetron 4 mg will be given to treat postoperative nausea or vomiting
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Enrollment
116
30 min preoperatively then every 8 hours postoperatively
30 min preoperatively then every 8 hours postoperatively
Cairo University
Cairo, Egypt
VAS
Visual analogue scale
Time frame: 30 minutes after extubation
total intraoperative fentanyl
mcg
Time frame: 30 seconds after skin incision until 1 min after skin closure
post operative nalbuphine
mg
Time frame: 30 minutes after extubation until 24 hours postoperatively
VAS
Visual analogue scale
Time frame: at 0.5, 4, 10, 18, and 24 hours after extubation
time to independent movement
defined as time from extubation to be able independently mobile e.g. using the bathroom
Time frame: 30 minutes after extubation until 24 hours postoperatively
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