What type of mixture is used to fill the inflation device for cardiac procedures?

In cardiac procedures, the inflation device, such as a balloon used during angioplasty, is typically filled with a mixture that enhances visibility under fluoroscopy while also maintaining the necessary pressure. The correct mixture consists of 50% contrast and 50% saline. This combination provides adequate opacity for imaging, allowing the healthcare provider to visualize the balloon's position and inflation clearly during the procedure.

Using a contrast agent helps to outline vascular structures and any abnormalities, while saline serves as a safe and sterility-preserving fluid. The equal proportions ensure that the mixture has sufficient density for imaging without being overly viscous, which could hinder the inflation device's effectiveness or complicate its operation. This balance is crucial for successful outcomes in interventional procedures.