Blood pump system

A blood pump system for internal use in humans, comprising:

• a deformable sac, said sac having in the non-deformed configuration a pair of opposite substantially parallel and planar walls of substantially circular shape joined by an annular wall of substantially semi-circular cross-section, said sac being formed in a seamless piece of flexible resilient material,
• said sac including inlet and outlet means extending from said annular wall of said sac substantially tangentially with respect to the annulus defined by said annular wall,
• said sac inlet means having an outer wall and an asymmetric frustoconical tapered section positioned to direct inlet flow toward said annular wall of said sac whereby a smooth flow within said sac is achieved;
• a pair of plates disposed on opposite sides of said sac, each of said plates being engageable with a respective one of said planar walls of said sac for displacing at least one of said planar walls toward the other to deform said sac;
• inlet conduit means removably connected to said inlet means including valve means for directing said inlet flow towards said sac;
• first connecting means for operatively connecting said inlet conduit means to said inlet means, said first connecting means including first sealing means for sealing said inlet conduit means and said inlet means connection;
• outlet conduit means removably connected to said outlet means including valve means for directing outlet flow away from said sac;
• and
• second connecting means for operatively connecting said outlet conduit means to said outlet means, said second connecting means including second sealing means for sealing said outlet conduit means and said outlet means connection.