Another study evaluated the effectiveness of combined local bladder hyperthermia and IVC for the treatment of patients with high-grade NMIBC, in which the median follow-up was 15.2 months,no tumor progression to T2 or disease-related mortality had occurred,and the bladder preservation rate was 86.5%, concluding that combined local bladder hyperthermia and IVC has a significant beneficial effect in patients with high-grade superficial bladder cancer, and the CHT was tolerated relatively well, most side effects were localized and transient