Laryngeal Injuries After Anesthesia Induction With Three Different Sevoflurane Concentrations (Without Muscle Relaxant)

Laryngeal Injuries After Anesthesia Induction With Three Different Sevoflurane Concentrations (Without Muscle Relaxant)

Anesthesia induction and tracheal intubation can be performed with and without neuromuscular blocking agents (NMBAs). Tracheal intubation can be performed with sevoflurane instead of NMBAs; intubating conditions are similar and the incidence of vocal cord injuries are similar, too.

We perform tracheal intubation with propofol, remifentanil and sevoflurane; sevoflurane is administered with three dosages. During tracheal intubation intubating conditions are noted. After surgery, all patients are examined by video laryngoscopy; moreover all patients are asked for hoarseness and sore throat.

Inclusion Criteria:

• ear-nose-throat surgery
• orotracheal intubation for surgery of the ear
• ASA I-III

Exclusion Criteria:

• obesity
• allergy against the study drugs
• patients with a known or suspected difficult airway
• diseases of the larynx