A Comparative study of dexmedetomidine and labetalol for attenuating hemodynamic response to laryngoscopy and intubation in patients coming for elective surgeries under general anaesthesia

The process of endotracheal intubation, commonly used in various medical procedures, plays a crucial role in ensuring adequate ventilation and oxygenation of patients. However, this procedure can also induce significant physiological changes, particularly in the cardiovascular system, leading to hemodynamic instability. Understanding the hemodynamic changes during intubation is of paramount importance for healthcare professionals to effectively manage and minimize the associated risks.General anesthesia with endotracheal intubation is very common now a days. Endotracheal intubation using direct laryngoscopes is associated with stimulation of trachea and larynx. This will result in tachycardia and rise in blood pressure .Eventhough the responses are short lived and causes less consequences in healthy patients. These changes can be fatal in patients with preexisting heart disease, hypertension or cerebrovascular condition, complications like left ventricular failure, intracranial hemorrhage and myocardial ischemia can occur as a result of tachycardia and sudden rise in blood pressure. Under such circumstances it becomes a necessity to attenuate such reflex responses associated with endotracheal intubation and laryngoscopy to achieve a balance between the myocardial oxygen supply and demand.Common strategies include deepening the depth of anesthesia, topical anaesthesia of the oropharynx, intravenous lignocaine, intravenous fentanyl, alfentanil, sodium nitroprusside, beta adrenergic blocking drugs, alpha-2-adrenergic agonists, calcium channel blockers etc.The advantages of Dexmedetomidine as premedicant in anaesthesia include sedation, analgesia, anxiolysis and improved hemodynamic stability. Because of these beneficial properties it has been found that minimum alveolar concentration (MAC) of volatile anaesthetic agent also decreases significantly up to 90% and hence decreases the requirement of anaesthetics.It has been found that it decrease the hemodynamic response to laryngoscopy and intubation.Labetalol is combined α1andβ antagonist and pre induction intravenous labetalol attenuated the hemodynamic response to endotracheal intubation.Labetalol is suitable for blunting the hemodynamic changes associated with laryngoscopy and intubationThis study between comparison of IV dexmedetomidine and IV labetalol aims at finding out which drug is better at blunting the stress response associated with laryngoscopy and intubation.