ABSTRACT
Introduction e self-expandable nitinol-containing atrial septal defect (ASD) device has been widely used worldwide and has been acknowledged for its excellent outcome.1,2 However, there was concern about nickel leaching aer implantation. CocoonTM Septal Occluder (CSO) (Vascular Innovation, Bangkok, ailand) has been developed to reduce this possible unfavorable consequence. By a process called plasma deposition, ultrathin layers of platinum atoms are deposited on the surface of nitinol wires. With this concept, without changing the properties of the nitinol material, nano-coating of platinum on the CSO can prevent nickel release following implantation.3 In 2010, CSO along with its accessories was approved for use in the European Union.
