Final answer:
Intrinsic sphincter deficit (ISD) refers to the loss of ability to control micturition due to a weakened or damaged internal urinary sphincter. It has implications for stress urinary incontinence (SUI), which is characterized by leakage of urine with activities that increase abdominal pressure. ISD may result in SUI due to the loss of support for the urethra.
Step-by-step explanation:
Intrinsic sphincter deficit (ISD) refers to the loss of ability to control micturition (urination) due to a weakened or damaged internal urinary sphincter, which is a smooth muscle at the juncture of the bladder and urethra. ISD has implications for stress urinary incontinence (SUI), which is caused by the loss of support for the urethra. Stress urinary incontinence is characterized by leakage of small amounts of urine with activities that increase abdominal pressure, such as coughing or sneezing.