The Pentax AWS is a novel video laryngoscope designed to facilitate tracheal intubation by providing indirect visualization of laryngeal inlet. It incorparates a video camera and a built in monitor. As a new technology, experience may be a determinant in the success of intubation with the Pentax AWS. We aimed to estimate the learning curve of success of intubation and time to intubation over the patient sequence with the Pentax AWS as compared to Machintosh laryngoscope, and to assess whether the learning curve differs by operator in the Pentax group.
99 patients requiring orotracheal intubation for elective surgery were randomly allocated to intubation with either Macintosh or Pentax. Two staff anesthiologists served as intubators and had minimal previous experience (5 total uses) of Pentax AWS for intubation. Learning curve of success of intubation on first attempt and time to intubation were assessed overall and for each device using logistic regression and Cox proportional hazards regression models, respectively.
97 patients with complete outcome data were included for analysis, 50 and 47 patients for Pentax and Machintosh respectively. In our main effects model (all patients), sequence was not significantly related to either success on first attempt (P=0.72) or time to intubation (P=0.81). Learning curve did not differ between Pentax and Macintosh for either success on first attempt (P=0.28) or time to intubation (P=0.76), adjusting for operator. Fig 1 shows no evidence of learning curve on time to intubation for Pentax (P=0.26). Further, operators did not differ on time-to-intubation learning curve for Pentax (P=0.97).
We observed no learning curve of the Pentax AWS, either overall or within operator. Extended experience is not required to operate the Pentax AWS.
The Pentax AWS may be used in the setting of airway management by both experienced and novince providers.
Rania Abdallah, No Financial Disclosure Information; No Product/Research Disclosure Information