Postoperative Sore Throat Clinical Trial
Official title:
Effect of Lidocaine 1% and 2% in the Endotracheal Tube Cuff on Postoperative Sore Throat and Cough
Comparing the effect of different methods of endotracheal tube cuff inflation on the occurrence of a postoperative sore throat and cough (Air vs Lidocaine 1% vs Lidocaine 2%).
Eligible patients undergoing general anesthesia will be randomized and assigned to three
groups:
Group A: Endotracheal tube cuff inflation with air Group B: Endotracheal tube cuff inflation
with Lidocaine 1% Group C: Endotracheal tube cuff inflation with Lidocaine 2%
The induction of anesthesia will be made following a preoxygenation with a facial mask with
100% Oxygen. It consists on the intravenous injection of Sufentanil 5 mcg or Fentanyl 50mcg,
Lidocaine 1mg/Kg, Propofol 2.5mg/kg, Rocuronium 0.6mg/kg or Cisatracurium 0.15mg/kg.
Maintenance of anesthesia will be done by sevoflurane + nitrous oxide, and reinjections of
morphinomimetics and curare will be made as needed (the total doses will be noted at the end
of the intervention).
The intubation is made by a N° 7.5 tube in men and a N° 7 tube in women. Cuff inflation will
be done upon placement of the endotracheal tube. The cuff's pressure will be monitored at
several intervals of the intervention and kept < or = 20 centimeter of water (cmH2O).
The volume of lidocaine used will never exceed 5 mg / kg for the patient to be protected from
the local toxicity of the local anesthetic in case of accidental rupture of the balloon.
All patients will receive Paracetamol every 6 hours for the first 24 hours after the end of
surgery.
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