| 摘要 |
<p>Anastomotic fitting for coronary artery bypass graft surgery having an assembly of four components including a cylindrical tube (12) having at least one rinflange locking indentation (12c) in an inflow end and a plurality of locking ring grooves (12e) in an outflow end, a ringflange (14) having a central aperture (14b) and plurality of long and short spikes (14g, 14f) the long spikes (14g) engaging in the locking indentation (12c), with a graft engaged therebetween, a fixation ring (16) having a central aperture (16b) and a plurality of spikes (16g, 16h) positioned about the aperture, and a locking ring (18) having an aperture (18b) with a plurality of locking ring ridges (18f) for engagement with the locking ring grooves. At surgical implantation an aortic wall having a hole therein engages between the ringflange (14) and the fixation ring (16) and is held in position by the spikes (16g, 16h) of the fixation ring, and the four components engage together forming an integral anastomotic fitting. A first alternative embodiment includes a three-component anastomotic fitting having a combination fixation ringlocking ring (36). A second alternative embodiment includes a four-component anastomotic fitting having a slightly flared end (52d) at an inflow end yielding a larger exposure of graft material at the anastomotic ostium.</p> |
