A device for connecting or disconnecting cannula to or from a tube. The
connection is uncomplicted, quick, safe and provides reproducible
conditions in a surgical procedure for connecting to a blood pump that
assists the heart or replaces the heart. A nipple (4) is formed on the
tube (5) which is inserted into the cannula (7). A rotatable claw ring
(1), which is arranged on a cannula end (71) for displacement to a stop
(2, 62), can be rotatably joined with a locking ring (3) which is secured
to a tube end (51) by axial movement and latching engagement with the
locking ring (3). The connection is releasable by rotating the claw ring
(1) and pulling the claw ring (1) and the cannula apart in an axial
direction.