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Punches designed to cut round holes close to the distal end of urinary drainage catheters. These punches are typically manual, handheld instruments with a rotating cylinder mounted on a small frame that resembles a rotational screw micrometer; the instrument can open small holes (3 mm in diameter is typical) in urine drainage catheters of an appropriate size (e.g., 14 Fr or larger). These catheter punches are used mainly to open additional holes in urinary catheters (e.g., urethral, suprapubic) used in percutaneous and/or endoscopic urinary catheterization procedures.
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