Lidocaine, Esmolol, and Beyond: A Comprehensive Analysis of Hemodynamic Stress during Laryngoscopy and Intubation

Abstract

Aim: To evaluate the haemodynamic stress response in combination of lidocaine and esmolol versus lidocaine or esmolol alone during laryngoscopy and intubation Methods: This research comprised 60 patients who provided written permission and met the inclusion and exclusion criteria. Selected patients were randomly assigned to one of three groups based on a computer-generated random number: lignocaine 1.5 mg/kg (n=40), esmolol 2mg/kg (n=40), or lignocaine 1mg/kg and esmolol 1mg/kg (n=40). This research comprised patients aged 20 to 42 who had elective procedures under general anaesthetic and had ASA I and II. Patients with contraindications to beta blockers, such as bronchial asthma, COPD, a basal heart rate of 60 beats per minute, respiratory impairment, and documented reactions to local anaesthetics. Results: There were no significant variations in age, preoperative heart rate, or blood pressure between the groups. Males and females were approximately equally dispersed throughout all groupings. Following the delivery of the test medicines, all three groups saw a substantial drop in heart rate (Group E 61.23±3.64, Group L 73.25±5.36, Group LE 72.23±5.36) (p<0.001). Four Group E patients developed bradycardia. (HR <60). Although both Group LE and Group L showed near baseline values, Group L showed near baseline values until the third minute, whereas Group LE showed a continuous reduction in heart rate rates. After 30 minutes, all three groups' heart rates were statistically insignificant. Following induction and administration of the test medicines, systolic, diastolic, and hence mean arterial blood pressure lowers gradually in all three groups (p<0.001). (This is for systolic blood pressure.). Group E 97.36±5.69, Group L 125.39±6.36, Group LE 116.78±4.78) Group E 60.034.69, Group L 82.935.36, Group LE 72.034.78) (Group E 72.10±3.69, Group L 96.90±3.85, Group LE 86.44±2.87) Before intubation, patients in Group E experienced substantial decreases in systolic, diastolic, and mean arterial blood pressure (less than 20% of baseline). Following intubation, blood pressure levels in Group LE were near baseline until the 30th minute (p<0.001). Group E had a consistent fall in all three blood pressure readings following intubation until the fifth minute. Group E's blood pressures were likewise around baseline at the 15th and 30th minutes. Until the 15th minute, Group L had a considerable rise in all three blood pressures. Conclusion: As a result, esmolol and lidocaine together are a safe and effective strategy to minimise laryngoscopy responses to intubation and extubation, lowering myocardial oxygen consumption and the risk of myocardial ischemia under general anaesthesia.