What kind of instrument is a resectoscope?

A resectoscope is a specialized instrument primarily used in urology for the removal of tissue, particularly in procedures involving the bladder and prostate. It functions by utilizing electrical current to resect or cut tissue, making it highly effective for surgeries such as transurethral resection of the prostate (TURP). This capability allows surgeons to perform precise removals of excess tissue that may be causing obstruction or other medical issues.

In contrast, the other options mention different types of instruments or functions that do not apply to the resectoscope. Instruments for urinary drainage are designed for fluid management rather than tissue removal. A device used for renal biopsy serves a specific purpose of obtaining kidney tissue for diagnostic evaluation, which does not align with the resectoscope's function. A suturing device relates to wound closure rather than to the removal of tissue. Thus, the correct identifier for a resectoscope is its role as a tool dedicated to tissue resection using electrical current.