a method and apparatus for injecting radiographic dye during angiography are provided . a deformable holding chamber is interposed between a contrast dye bottle and a syringe manifold . a one - way valve and an integral disconnect / flow - stop are connected between the bottle and the holding chamber . a vent is provided in the holding chamber , with a second one - way valve . squeezing and releasing the deformable chamber fills the chamber from the bottle . the holding chamber contains a floating baffle which acts as a shut off valve by plugging the chamber outlet if the chamber becomes empty . the syringe is used to withdraw dye from the holding chamber . if dye remains in the bottle after performance of the procedure , the disconnect / flow - stop fitting can be disconnected , and the dye can be saved .