ABSTRACT
I. INTRODUCTION The concept of leak point pressure (LPP), which is the value of detrusor pressure when leakage occurs in the absence of a rise in abdominal pressure, was introduced by McGuire et al. (1) to evaluate the risk of upper tract deterioration in children with myelomeningocele. This test was later adapted to women with stress urinary incontinence (SUI) by using abdominal LPP (ALPP), the value of bladder pressure (Pves) at which leakage occurs in the absence of detrusor contraction (2). If the patient is straining or coughing to provoke leakage, the test is called Valsalva leak point pressure (VLPP) or cough leak point pressure (CLPP), respectively.
