Method and apparatus for producing pulsation

An apparatus which provides a predetermined pulsed flow of a solution to an organ, comprising:

• a conduit arrangement having an inlet and an outlet adapted to be connected to said organ to thereby enable said solution to be pumped to said organ;
• pump means connected to direct said solution from said inlet to said outlet through said conduit arrangement;
• first valve means disposed in said conduit arrangement downstream of said pump means;
• a bypass line connected between a first portion of said conduit arrangement downstream of said first valve means and a second portion of said conduit arrangement upstream of said pump means;
• second valve means disposed in said bypass line;
• valve controlling means for periodically operating said first valve means sand said second valve means in synchronism to provide a first pulsed flow of said solution in said first portion of said conduit arrangement upstream of said bypass line and said predetermined pulsed flow in said first portion of said conduit arrangement downstream of said connection of said first portion of said conduit arrangement to said bypass line,
• said apparatus further comprising an oxygenator disposed in said conduit arrangement upstream of said pump means and first valve means.