Macintosh laryngoscope versus Bonfils Intubation Endoscopes in endotracheal intubation: Hemodynamic,intra-ocular pressure and serum catecholamine responses

ObjectiveOne of the alternative methods in managing patients for endo-tracheal intubation is the Bonfils fiberscope. We studied the efficacy of Bonfils fiberscope in comparison to the classical laryngoscope with Macintosh blade inhemodynamic, serum catecholamine and intra-ocular pressure responses.MethodsIn a prospective, randomized trial 40 patients ASA I or II aged ?18 years scheduled for gynecological, urinary and lower abdominal procedures in supine position were randomly allocated to one of two groups; 20 patients each; according to intubating device by using either Macintosh laryngoscope (L) group or Bonfils Intubation Endoscopes (B) group. Pre-induction (baseline) and pre-insertion values of HR, MAP, IOP and blood samples for catecholamine level were recorded and repeated at 1, 3, and 5 min after intubation.ResultsThere was significant increase in HR, MAP, IOP and catecholamine level in L group at 1, 3, and 5 min after intubation.ConclusionBonfils laryngoscope had superiority over Macintosh as a method of intubation in situations where minimal changes in hemodynamic, catecholamine level and intraocular pressure are desirable.