[HSF] ATS valve

[Rwmfglycar at aol.com]

Yes there will be effects from a projection into the flow path.  Acceleration 
of flow followed by vortices and slowing of flow is what produces  effects: 
acceleration of flow over a projection may damage red cells or activate  
platelets. The slowing of flow gives time for actvated platelets to form  aggregates 
with fibrin. This phenomenon can take place at the edge of the  housing or 
along the edge of a leaflet as well as at the hinge area..  Note the fact that 
there is  hemolysis (at a low level) in all  pyrolytic carbon valves. I will 
eventually get some comparative data  together
Bob
In a message dated 6/19/2007 5:44:04 P.M. Eastern Daylight Time,  
nfaabouseada at gmail.com writes:

would  not that interfere with sI will eventually get tream flow ? .... how 
about  resultant
turbulence due to projections in the flow stream ? ... any  significance? any
effects?

NFA


On 6/19/07,  Rwmfglycar at aol.com <Rwmfglycar at aol.com> wrote:
>
> Open  pivot design.
> Most bileaflet valves have have rounded hinges on the  leaflets which  fit
> into a recess. The ATS has projections from  the rounded inner wall of the
> housing which engage with the  leaflet.
> Bob
>
>
>
>  ************************************** See what's free at
>  http://www.aol.com.
>  _______________________________________________
> OpenHeart-L mailing  list
>
> Send postings to:
>  OpenHeart-L at lists.hsforum.com
>
> To UNSUBSCRIBE, to CHANGE email  address, or to view archives:
>  http://mmp.cjp.com/mailman/listinfo/openheart-l
>
> All messages  transmitted by the OpenHeart-L are subject to the policies
> and
>  disclaimers posted at:
> http://www.hsforum.com/listdisclaim
>  -----------------------------------------
>



--  
Nasser  F.  Abou'Seada,
MB,ChB,MD,FRCSEd,ChM,ChD  C/Th,
FICS,FISCVS,FSSRCTS,FHMS,MESC
_______________________________________________
OpenHeart-L  mailing list

Send postings  to:
OpenHeart-L at lists.hsforum.com

To UNSUBSCRIBE, to CHANGE email  address, or to view  archives:
http://mmp.cjp.com/mailman/listinfo/openheart-l

All  messages transmitted by the OpenHeart-L are subject to the policies and  
disclaimers posted  at:
http://www.hsforum.com/listdisclaim
-----------------------------------------







************************************** See what's free at http://www.aol.com.