The chicken wing training model in cerebrovascular microsurgery for the side-to-side bypass

In the expanding era of endovascular treatment and minimally invasive techniques, the neurosurgical trainees have a steady decrease in the exposure to microsurgical skills. However, there remain a need for neurosurgical trainees to be proficient at such skills, particularly for performing high-stakes interventions such as vascular bypasses. The scarcity of cerebrovascular bypasses coupled with the technical expertise it demands necessitates the presence of a training model for neurosurgical residents and fellows. Regarding the model utilizing the chicken wing for vascular anastomoses, the neurosurgical literature has described many models of bypasses involving the end-to-end and end-to-side anastomoses. The side-to-side anastomosis however is not clearly depicted in these papers. Here we focus on technique, chicken wing anatomy, and donor/recipient vessel diameters to provide a comprehensive guide for trainees. We describe a reproducible and reliable chicken wing model to perform an in-situ side-to-side bypass that incorporates integral elements of a successful bypass surgery.