This book describes the clinical application of clean intermittent catheterization (CIC), a method regularly emptying the bladder under clean conditions by using a catheter through the urethra or cystostomy. First chapters introduce the basic knowledge and operation methods of CIC, and following chapters cover the clinical application of CIC, the evaluation and follow-up of CIC. The relevant operation of CIC is illustrated in detail. It is an important reference book for medical staff, graduate students and undergraduate students who are engaged in the diagnosis and treatment of various disorders of urination, especially for medical staff of urology, pediatric surgery (pediatric urology), rehabilitation department and neurology department, and for urinary control and stoma nursing staff, as well as for patients who need CIC.