Final answer:
A Pereyra needle is used for cystoscopy, a surgical procedure to examine the bladder and urinary tract without making a surgical incision.
Step-by-step explanation:
A Pereyra needle is used for cystoscopy, which is a type of surgical procedure that allows a doctor to examine the inside of the bladder and urinary tract. The Pereyra needle is specifically designed to access the bladder through the anterior abdominal wall, avoiding the need for a surgical incision. It is commonly used in urological surgeries.