What term describes a surgical urinary diversion that utilizes a segment of the ileum?

The term that accurately describes a surgical urinary diversion using a segment of the ileum is "ileal conduit." This procedure involves surgically creating a passage for urine to be expelled from the body, where a piece of the ileum (the last part of the small intestine) is reconfigured to divert urine from the ureters to an external stoma (an opening on the abdominal wall).

In this context, the ileal conduit is functional because it maintains the excretion of urine while bypassing the bladder, which may be necessary due to conditions affecting bladder function or following bladder removal. The ileum's absorption capabilities also play a role in managing the urinary output, particularly in terms of electrolyte balance and fluid management.

The other terms listed do not describe surgical urinary diversions. A cystoscope is an instrument used for visualizing the inside of the bladder, cystolithotomy refers to a surgical procedure to remove stones from the bladder, and a filiform catheter is a type of catheter often used for accessing the urethra. These terms do not pertain to the creation or mechanism of a urinary diversion using a segment of the ileum.