Cook® Sphere® Inflation Device Product Information During minimally invasive balloon dilation procedures, the Cook Sphere Inflation Device can be used to inflate the balloon with fluid, to monitor the pressure in the balloon during the procedure, and to deflate the balloon after dilation. Related products Add to cart Cook® ERCP Catheters $0.00 Add to cart Cook® Evolution® Biliary Controlled-Release Stent $0.00 Add to cart Cook® Fusion Cytology Brush $0.00 Add to cart Cook® Quantum TTC® Balloon Dilator $0.00 Add to cart TaeWoong Niti-S™ Bumpy™ Biliary Stent $0.00