Particularly useful for temporarily blocking the patent ductus, a blood vessel that connects the pulmonary artery to the aorta in newborns and must occasionally be closed to prevent abnormal blood flow, is the 6 1/4" Debakey Pediatric Patent Ductus Clamp with a Straight Shank, a specialized surgical tool made for use in pediatric cardiac surgeries, specifically for procedures involving the patent ductus arteriosus (PDA).