HEMODYNAMIC STRESS RESPONSE: ROLE OF AIRWAY NERVE BLOCK IN MICROLARYNGEAL SURGERIES

Dr. Ranabir Chanda, Dr. Auditi Gupta

Abstract


Background:Microlaryngeal surgeries produce hemodynamic stress response which is manifested as rise of blood pressure and heart rateleading to harmful consequences, particularly in patientssuffering from significant cardiovascular disorders.These hemodynamic changes can be attenuated by various drugs. No single drug is solely effective for this purpose. Aims: To observe the efficacy of airway nerve block in reducing hemodynamic stress response and postoperative complications  following microlaryngeal surgery. Materials and methods: After obtaining approval from the Institutional Ethics Committee and written informed consent, 60 patients of either sex aged between 25 to 65 years of ASA physical status I undergoing microlaryngeal surgery were randomly allocated  into two equal groups (group B and group C) with 30 patients in each group. Airway nerve block was performed in group B patients whereas airway nerve block was not administered in Group C patients. Subsequently microlaryngeal surgery was performed under general anaesthesia with controlled ventilation. Baseline and intraoperative heart rate, mean arterial pressure and postoperative complications were recorded. Results: Heart rate at 5,10 and 15 minutes was lower in block group but not statistically significant. However, heart rate at 30 and 45 minutes was significantly lower in block group. Mean arterial pressure was significantly lower in block group than control group at all time intervals. No postoperative laryngospasm, bronchospasm and desaturation were found in block group. Conclusion: Air way nerve block may be effective to prevent hemodynamic stress response and postoperative complications following microlaryngeal surgery.


Keywords


air way nerve block, general anaesthesia,microlaryngeal surgery

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References


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