this study aims to compare between the role of Labetalol infusion versus Dexmedetomidine infusion in hypotensive anesthesia in Ear, Nose and Throat surgeries.
Hypotensive anaesthesia is the deliberate lowering of a patient's blood pressure during surgery. It is necessary during ear, nose and throat surgery for drying surgical field, ease in operation procedure and shortening of the duration of surgery. Labetalol is a unique parenteral anti-hypertensive drug that has selective α1 and non- selective β adrenergic antagonist effects. In humans, the β to α blocking potency ratio is 7: 1 for IV labetalol. Dexmedetomidine is highly selective alpha2 adrenergic agonist having several beneficial actions during the perioperative period. Activation of alpha2 adrenergic receptors in the brain and spinal cord inhibits neuronal firing causing hypotension and bradycardia. This study was designed to compare between the role of Labetalol infusion versus Dexmedetomidine infusion in hypotensive anesthesia in Ear, Nose and Throat surgeries.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
SINGLE
Enrollment
80
The study compares the role of Labetalol infusion versus Dexmedetomidine infusion in hypotensive anesthesia in patients having ear, nose and throat surgeries
Ain Shams university
Cairo, Cairo Governorate, Egypt
RECRUITINGMean arterial blood pressure changes before induction of anesthesia & every 15 min throughout deliberate hypotension
Time frame: 12 months
Heart rate changes before induction of anesthesia and every 15 min
Time frame: 12 months
Surgical site oligaemia will be evaluated by the surgeons by rating the amount of bleeding according to Modena bleeding score that provides five different levels (from "Grade 1 - no bleeding" to "Grade 5")
Time frame: 12 months
Surgeon satisfaction At the end of the surgery will be evaluated by one surgeon and recorded according to a 5-point Likert scale (5: excellent, 4: Good, 3: Satisfactory, 2: Poor, 1: Very poor)
Time frame: 12 months
Total anesthetic consumption including both inhalational anesthetic consumption and narcotics consumption.
Time frame: 12 months
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