Objective To investigate the totally extraperitoneal laparoscopic tension-free inguinal hernia repair(TEP) and its influence on testicular hemodynamics. Methods Sixty-six cases with unilateral inguinal hernia were enrolled in a prospective internally controlled cohort study, and were performed totally laparoscopic extraperitoneal tension-free inguinal hernia repair(TEP). Pre- and post-operative blood flow parameters of bilateral testicular arteries, including peak systolic velocity(PSV), end diastolic veloc...