A prospective randomised study comparing intravenous magnesium sulphate and sublingual nitroglycerine spray in attenuating haemodynamic responses to laryngoscopy and intubation

Authors

  • Deepti M. Kotwani Department of Anaesthesiology, Lokmanya Tilak Municipal Medical College and General Hospital, Sion, Mumbai, Maharashtra, India
  • Manish B. Kotwani Department of Anaesthesiology, Lokmanya Tilak Municipal Medical College and General Hospital, Sion, Mumbai, Maharashtra, India
  • Amit Hiwarkar Department of Anaesthesiology, Ganpati Hospital, Jalgaon, Maharashtra, India

DOI:

https://doi.org/10.18203/2349-3259.ijct20181396

Keywords:

Laryngoscopy, Intubation, Magnesium sulphate, Nitroglycerine spray

Abstract

Background: Laryngoscopy and tracheal Intubation are invariably associated with certain stress responses due to the sympatho-adrenal stimulation. These cardiovascular and neurohumoral alterations may directly affect the physiology and increase the risk. So far, various drugs have been tried but none has been considered ideal for blunting this presser response. We therefore, planned this comparative study to evaluate and compare the efficacy of intravenous magnesium sulphate (30 mg/kg) versus sublingual nitroglycerine spray (0.4 mg/spray) in attenuating the presser response to Laryngoscopy and Tracheal Intubation.

Methods: Fifty patients, aged 15–50 years, scheduled for elective surgery under general anaesthesia, were randomly assigned to one of the two groups of 25 each, Group A (magnesium group) and Group B (nitroglycerine group). Study drug was given 90-120 seconds before tracheal intubation. Heart rate, Systolic blood pressure and Rate pressure product were recorded at different intervals after administering the study drug till 3 minutes after intubation.

Results: Mean heart rate was significantly higher from the baseline at all times after administering the study drug in both the groups. Increase in systolic blood pressure as a presser response was limited to 7.25% in Group A and 5.83% in Group B from the baseline after tracheal intubation. There was relative hypotension after administration of the study drug in both the groups.

Conclusions: Intravenous magnesium or sublingual nitroglycerine pre-treatment is found to be effective in attenuating the presser response to laryngoscopy and intubation. These drugs may lead to rise in HR but it is transient and dose dependent. However, both the drugs can significantly control the hypertensive response after laryngoscopy and intubation.

 

Author Biographies

Deepti M. Kotwani, Department of Anaesthesiology, Lokmanya Tilak Municipal Medical College and General Hospital, Sion, Mumbai, Maharashtra, India

Assistant Professor, 

Department of Anaesthesiology

Manish B. Kotwani, Department of Anaesthesiology, Lokmanya Tilak Municipal Medical College and General Hospital, Sion, Mumbai, Maharashtra, India

Department Of Anaesthesiology

Associate Professor

Amit Hiwarkar, Department of Anaesthesiology, Ganpati Hospital, Jalgaon, Maharashtra, India

Consultant Anaesthesiologist

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Published

2018-04-24

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Original Research Articles