English to French Medical Medical: Cardiology Examples: eversion carotid endarterectomy, ICA plaque, clamping

The document is a description of the eversion carotid endarterectomy technique. I need some help with the translation of "normal soft artery". I understand that a normal artery is an artery without atherosclerotic plaque. In this case, I don't know how to translate the term "soft" since it refers to the morphology of an atherosclerotic plaque according to my researches.

Here is the complete sentence:

"Sufficient distal dissection past the palpable ICA plaque is needed to allow clamping of the normal soft artery."

Thank you for your help.