Indeflator is an inflation/deflation device used to inflate and deflate an angioplasty balloon during coronary angioplasty. The device has an inflation syringe, a connecting tube and a pressure gauge. The inflation syringe has a lock to maintain negative pressure in the balloon while introducing into the vessel and positioning across the lesion.
The pressure gauge monitors the pressure developed within the angioplasty balloon while the balloon is being inflated. This is needed for maintaining safety of the inflations. Each balloon has rated burst pressure and going above the rated burst pressure increases the risk of balloon rupture. Balloons reach nominal diameters at pressures rated as nominal inflation pressure. Inflation pressure is usually measure in atmospheres.
One atmosphere = 101.325 kPa (kiloPascals) or 14.69595 psi (pounds per square inch) = 1.01325 bar
Rated Burst Pressure (RBP) of a balloon is the pressure below which 99.9% of the balloons will not burst on a single inflation .