Design, application and evaluation of a cricothyrotomy model for a multidisciplinary simulation. An observational single centre study

Abstract Background The management of a difficult airway requires training in cricothyroidotomy (CT). The objectives of this study were: (i) to describe technical changes made to The REAL CRIC Trainer model in order to increase its realism, (ii) to assess the model by experts in comparison to a commercial dry model, (iii) to evaluate its performance in a realistic simulation scenario for training technical and behavioural skills, and (iv) to assess whether the model can help to identify anatomic structures by ultrasound (US). Methods An observational prospective study was conducted in which an assembled modified model was assessed by five experts in CT and comparing it with a commercial dry model. The fidelity of US images obtained in the model was compared to those obtained from volunteers. The usefulness and realism of the model, attached to a high-fidelity simulator's neck in emergent CT clinical scenario, was assessed by the 11 ICU staff taking part. Results Using a score out of 10, CT performance in our model and in a dry model was rated by the experts as 9 vs. 6, respectively in external appearance, 8.4 vs. 5.8 in tactile fidelity, and 8.6 vs. 4.1 in technical realism. Participants in the simulation gave a mean score of 7.7/10 to the fidelity parameters. Usefulness for training of the model integration into a simulation scenario was rated as 9.6. Ultrasound images were evaluated as high fidelity. Conclusions Our modified REAL CRIC Trainer model was rated high by experts in CT and participants in a simulated clinical scenario, and may be useful for a complete emergent CT training closer to the clinical reality than the models currently available.