| 摘要 |
<p>1490492 Valves E BLOCH 19 Feb 1976 [6 June 1975] 06502/76 Heading F2V A prosthetic one-way heart valve comprises an annular valve body 15 having a valve disc 18 mounted within it for pivotal movement around an axis extending through the centre line of the disc, the disc having vane means 28, 29 against which fluid can act to open the valve and the valve body having a baffle 25 arranged to direct fluid against the other face of the disc to close the valve. Modifications of the basic valve are illustrated in Figs. 5 to 15, (not shown). The disc may be mounted by a shaft 19 or by resting between two sets of spaced pins arranged at diametrically opposite locations on the valve orifice 21, which spacing can be such as to allow rocking of the disc about its own plane as well as pivoting. The valve body may have stops or fingers to limit pivotal movement. The vanes may be placed on one half (as shown) or both halves or symmetrically around the face of the disc and are preferably arranged as a pocket containing gaps to prevent trapping the fluid. The valve body may be provided with another baffle arranged to direct fluid towards the vanes. Preferably both parts of the disc 18a, 18b are arranged to be substantially the same weight. The disc may be, in crosssection, as shown, flat, or have offset but parallel halves.</p> |
