Small bore prosthe
Small bore prostheses
There is no generally accepted small – bore prostheses that works well although there are several prototypes. The process of evaluation small arteries is viscoelastic .
The wall of a small above prostheses should be elastic in addition the wall must be micro porous and resist kinking .
Criteria for success of heat prostheses
Success of prostheses may be claimed on the basis of complication that can be attributed to the prostheses itself and continues to allow blood flow (this does not necessarily mean good function) for example aorta bypass may :
1-remain patent and the patient remain symptom free ,
2-remain patent but the symptoms persist
3-occlude in time, but without return of symptoms or
4-occlude with immediate return of symptoms .
1,2 would both be classed as a success symptoms , while 3,4 would be failures