Evaluation of the Auryzon™ EAR 2.0 System in Ear Reconstruction

Cartilage-based ear reconstruction addresses congenital anomalies, such as microtia, as well as deformities due to trauma or oncologic resection by replacing like with like tissue. Current technique involves the use of the autologous cartilage as the gold standard and involves harvesting patient's own rib cartilage and carving them into different ear subunits, which are then assembled with numerous steel wires. Challenges of this technique include high operator-dependency due to extensive carving, inconsistent outcomes, prolonged anesthesia, and need for wire or suture fixation, leading to wire extrusion, cartilage resorption, and overall high cost. The previously published prototype device utilized specialized blades to standardize this process. Given the complexity of auricular reconstruction and the suboptimal outcomes by most plastic surgeons globally, there is a pressing need for a standardized, enhanced and accessible method for an accurate ear framework.

If successful, this project has the potential to improve plastic surgeons' technical proficiency in producing anatomically accurate auricular frameworks. Achieving these aims could substantially advance reconstructive clinical techniques in clinical practice and broaden access to satisfactory ear reconstruction beyond the limited number of highly specialized centers. Furthermore, the novel blade design has the potential to reduce the need for wire suturing, while also reducing overall framework production time, anesthesia duration, and costs.

Comparing hand-carved and blade-cut techniques for cadaveric cartilage, the study will enhance understanding of potential differences in resorption rate between these methods. This study aims to: 1. Promote framework production through precise bladecutting, facilitating the construction of cartilaginous ear frameworks while improving outcomes and reducing operative time and costs; 2. Standardize framework production independently of operator skill. 3. Reduce the number of wires required for construct fixation, further contributing to decreased operative time and cost; 4. Minimize the risk of wire extrusion by limiting wires usage during framework production through the novel blade design. 5. Compare differences in framework appearance, stability, time to production, operative time, intraoperative morbidity, and construct resorption within the first year postoperatively when using cadaveric cartilage.

Inclusion criteria

• Patients aged 5-20 years seeking to undergo surgical ear reconstruction or microtia repair under general anesthesia through NCH-FL
• Pre-existing physical deformity of the ear necessitating surgical reconstruction
• Patient of sufficient health to undergo surgery under general anesthesia
• Parental or legally acceptable representative (LAR) permission obtained for inclusion in the study; patient assent obtained where age-appropriate
• Sufficient fluency in English or Spanish to complete patient/parent surveys

Exclusion criteria

• Patients who will be ≤4 years old, or ≥21 years old at time of surgery
• Patients with ear deformities do not require surgical correction
• Patient's whose ear reconstruction surgery will be performed somewhere other than Nemours Children's Hospital - Florida
• Patients determined to be in poor health to undergo surgery under general anesthesia
• Parental or LAR permission cannot be obtained, and/or patient of sufficient age and cognitive capacity declines to assent
• Lack of fluency in English or Spanish to complete patient/parent surveys