Cook® Whistle Tip Ureteral Catheter Product Information Used for drainage and retrograde pyelogram. Additional Information FURTHER INFORMATION Related products Add to cart Cook® Dual Lumen Ureteral Access Catheter $0.00 Add to cart Cook® NCircle Tipless Stone Extractor $0.00 Add to cart Cook® Roadrunner® PC Wire Guide – Double Flexible $0.00 Add to cart Cook® Urethral Dilator Set $0.00 Add to cart Cook® Williams Cystoscopic Injection Needle $0.00