A case series of the Royal Perth Hospital cannula-first approach in the 'can't intubate, can't oxygenate' scenario.

At the Royal Perth Hospital, we have been developing and teaching a can't intubate, can't oxygenate (CICO) rescue algorithm for over 19 years, based on live animal simulation. The algorithm involves a 'cannula-first' approach, with jet oxygenation and progression to scalpel techniques if required in a stepwise fashion. There is little reported experience of this approach to the CICO scenario in humans. We present eight cases in which a cannula-first Royal Perth Hospital approach was successfully implemented during an airway crisis. We recommend that institutions teach and practice this approach; we believe it is effective, safe and minimally invasive when undertaken by clinicians who have been trained in it and have immediate access to the requisite equipment. The equipment is low cost, comprising a 14G Insyte cannula, saline, 5 ml syringe and a Rapid-O2. Training can be provided using low-fidelity manikins or part-task trainers.

The Bullying in Anaesthesia Registrars Survey (BARS): Does a validated questionnaire improve our understanding of bullying in Australian and New Zealand anaesthesia trainees?

Previous studies have established that bullying is a pervasive problem in healthcare. However, most investigations of bullying in anaesthesia use self-labelled survey questions in which respondents' subjective perceptions of bullying are central in defining prevalence. This study applied the validated revised Negative Acts Questionnaire (NAQ-r) for a more objective assessment of bullying prevalence and types of negative behaviours experienced by anaesthesia trainees in Australia and New Zealand.An online questionnaire was distributed by the Australian and New Zealand College of Anaesthetists (ANZCA) Clinical Trials Network to 990 randomly selected ANZCA trainees. Bullying prevalence was assessed using both a self-labelled survey tool and the NAQ-r, which requires respondents to select from a list of negative acts, with validated cut-offs that define bullying. Sources of bullying, impact on recipients and barriers to reporting were also examined. This design allowed comparison of the two methods for evaluating bullying prevalence.Twenty-six percent of trainees surveyed completed both bullying survey instruments. Thirty percent of these respondents self-labelled as having experienced bullying in the previous six months, with 8% reporting bullying at least monthly. With the NAQ-r, most respondents (96%) reported experiencing at least one negative act in the prior six months, with 54% reporting these on a monthly basis. The most frequent behaviours described were humiliation and intimidation. Using NAQ-r cut-offs, 36% of respondents experienced occasional bullying and 10% were victims of severe workplace bullying.The NAQ-r provides a more nuanced and objective insight into bullying faced by ANZCA trainees than do self-labelled surveys. The results of the present study provide a valuable baseline for ongoing assessment.

Effect of Apneic Oxygenation on Tracheal Oxygen Levels, Tracheal Pressure, and Carbon Dioxide Accumulation: A Randomized, Controlled Trial of Buccal Oxygen Administration.

BACKGROUND: Apneic oxygenation via the oral route using a buccal device extends the safe apnea time in most but not all obese patients. Apneic oxygenation techniques are most effective when tracheal oxygen concentrations are maintained >90%. It remains unclear whether buccal oxygen administration consistently achieves this goal and whether significant risks of hypercarbia or barotrauma exist. METHODS: We conducted a randomized trial of buccal or sham oxygenation in healthy, nonobese patients (n = 20), using prolonged laryngoscopy to maintain apnea with a patent airway until arterial oxygen saturation (SpO2) dropped <95% or 750 seconds elapsed. Tracheal oxygen concentration, tracheal pressure, and transcutaneous carbon dioxide (CO2) were measured throughout. The primary outcome was maintenance of a tracheal oxygen concentration >90% during apnea. RESULTS: Buccal patients were more likely to achieve the primary outcome (P < .0001), had higher tracheal oxygen concentrations throughout apnea (mean difference, 65.9%; 95% confidence interval [CI], 62.6%-69.3%; P < .0001), and had a prolonged median (interquartile range) apnea time with SpO2 >94%; 750 seconds (750-750 seconds) vs 447 seconds (405-525 seconds); P < .001. One patient desaturated to SpO2 <95% despite 100% tracheal oxygen. Mean tracheal pressures were low in the buccal (0.21 cm·H2O; SD = 0.39) and sham (0.56 cm·H2O; SD = 1.25) arms; mean difference, -0.35 cm·H2O; 95% CI, 1.22-0.53; P = .41. CO2 accumulation during early apnea before any study end points were reached was linear and marginally faster in the buccal arm (3.16 vs 2.82 mm Hg/min; mean difference, 0.34; 95% CI, 0.30-0.38; P < .001). Prolonged apnea in the buccal arm revealed nonlinear CO2 accumulation that declined over time and averaged 2.22 mm Hg/min (95% CI, 2.21-2.23). CONCLUSIONS: Buccal oxygen administration reliably maintains high tracheal oxygen concentrations, but early arterial desaturation can still occur through mechanisms other than device failure. Whereas the risk of hypercarbia is similar to that observed with other approaches, the risk of barotrauma is negligible. Continuous measurement of advanced physiological parameters is feasible in an apneic oxygenation trial and can assist with device evaluation.