Altered Airway Anatomy Course Using 3D-Printed Models for Medical Students

A deployable curriculum with 3D printed skills trainers for altered airway management

BACKGROUND

Altered Airway Anatomy (AAA), including tracheostomies and laryngectomies, may represent an area of unease for non-Otolaryngology trainees, due to a lack of exposure, structured education, or dedicated training in altered airway management. Inability to effectively stabilize an altered airway is associated with significant risk of patient morbidity and mortality. This study aims to assess the efficacy of a concise curriculum using three-dimensional (3D) printed airway models for skill training in improving Anesthesiology trainees' competency in AAA management.

METHODS

A prospective cohort of 42 anesthesiology residents at a tertiary care institution were guided through a 75-min curriculum on AAA, including case discussion, surgical video, and hands-on practice with tracheostomy and laryngectomy skills trainers. Pre- and post- course surveys assessing provider confidence (Likert scale) and knowledge (multiple choice questions) were administered. Additionally, an observed skills competency assessment was performed.

RESULTS

Self-perceived confidence improved from a summative score across all domains of 23.65/40 pre-course to 36.39/40 post-course (n = 31, p < 0.001). Technical knowledge on multiple choice questions improved from 71 to 95% (n = 29, p < 0.001). In the completed skills competency assessment, 42/42 residents completed 5/5 assessed tasks successfully, demonstrating objective skills-based competency.

CONCLUSIONS

This study demonstrates an improvement in anesthesiology resident self-assessed confidence, objective knowledge, and skills based competency surrounding management of patients with AAA following a 75-min simulation-based curriculum.

Validation of 3D printed MAYO tubes and stethoscope in simulated medical environment - Tools fabricated with additive manufacturing for emergency care

Emergency and disaster medical care often face resource or equipment shortages. 3D printing technology has been proven to be effective in cases with insufficient supply chains. MAYO tubes and stethoscopes are essential components of ABCDE patient examinations; however, 3D-printed variants have not been fully tested. These 3D-printed instruments were substituted and validated in a simulated pre-hospital environment. In total, 26 participants were included in this study. Fifteen clinicians or paramedics with at least 3 years of professional experience and 10 medical students. One student was excluded because he had relevant experience with emergency care. As basic tasks, the placement of MAYO tubes and auscultation with stethoscopes were performed using medical simulators. 3D printed instruments were compared with conventional clinical devices by measuring the time required for the intervention, success rate, and user satisfaction. In the study FFF (Fused Filament Fabrication (FFF), SLS (Selective Laser Sintering (SLS), and SLA (stereolithography) 3D printing were used in this study. The times required for implementation and auscultation were examined for each instrument. There was no significant difference between the MAYO tube (p = 0.798) and the stethoscope (p = 0.676). In the case of stethoscopy, the study investigated the correct diagnosis, and no significant difference was found (p = 0.239), although an interesting trend was observed. Regarding the MAYO tube, the study found no significant difference in correct position formation (p = 0.163). The experience levels of the groups did not influence these factors. However, significant differences in user satisfaction were found in both cases in favour of the conventional versions (p < 0.001). Overall, the results of this study suggest that 3D-printed devices could be suitable replacements for clinic-based devices in emergency situations. The 3D-printed devices did not perform inferiorly at any of the indicated points compared to their classical counterparts. However, the practical applicability of the devices used in this study requires further investigation.