Question

Say a Doctor has a provisional patent on an elastic arterial stent (an implantable device that patches ruptures (aneurisms) in major blood afteries like the aorta). The only problem is that the doctor’s engineer asked him how strong to build it and needs a value of the estimated peak tension in the thin walls of the hollow cylindrical tube-like stent.

In order to match an average human aorta, the stent’s length is going to be 12cm and its diameter will be about 3cm.

A quick check of a pateint’s blood pressure with a sphymomanometer shows the man to have a systolic (peak) pressure of 183mm Hg (normal is 120 or lower).

What value for force of tension should the doctor give to his engineer?

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Answer 1