Design
In this retrospective study, we reviewed medical records of 80 CSOM patients who underwent endoscopic myringoplasty between August 2019 and April 2021 with an extra perichondrium patch to strengthen the traditional cartilage graft. The demographics and characteristics of patients are shown in Table 1. The trial has been approved by the ethics committee of XX hospital.
Patients were enrolled using the following inclusion criteria and exclusion criteria. Inclusion criteria: (1) CSOM patients with large (diameter ≥ 5mm), subtotal or anterior marginal perforations; (2) patients who had received an extra perichondrium patch during the procedure of endoscopic cartilage myringoplasty; (3) patients without pathological changes in tympanum, attic or the ossicular chain and who underwent myringoplasty only; (4) patients who had provided informed consent. Exclusion criteria: (1) patients who cannot tolerate general anesthesia due to serious diseases; (2) patients with severe EAC stenosis or EAC malformation; (3) patients with small perforation (diameter less than 5 mm).