Endogenous α1‐antitrypsin levels in the perilymphatic fluid correlates with severity of hearing loss

Objectives To determine the levels of endogenous α1‐antitrypsin in the perilymph of patients undergoing cochlear implant (CI), and its reverse association with the severity of hearing loss. Study Design Retrospective study. Setting Tertiary care university hospital. Participants The study includes 38 patients undergoing CI surgery, 11 patients diagnosed with congenital deafness and 27 non‐congenital deafness, eight patients diagnosed with...