Cooley Pediatric ClampDDP Elite USA Cooley Pediatric Clamp is ideally suited for clamping in cardiothoracic surgical procedures with pediatric patients. This clamp features jaws that are calibrated at 5. 0 mm intervals but are still delicate enough for use in pediatric surgeries. This instrument is designed to keep a firm hold on the vessels that are being occluded but delicate enough not to bruise or tear the vessels thus reducing the amount of damage done to the patient.