也许是我理解上的错误，那位教授的原话是：Commenting on the BIOMAGSCAR trial，

Professor Martin said: “Over 1.5 million stents per year are currently used in Europe and although they have improved patient outcomes, stents still fail.”

“The novel concept we propose is the use of a biodegradable magnetisedstent with the ability to attract the patient’s own stem cells, which have been ‘tagged’ with iron nanoparticles. The cells will then multiply and form a new artery lining. We believe this technology could save over 66,000 people from unnecessary suffering, as well as saving the European healthcare system €275 million a year.”

 我对这个unnecessary的理解可能有误，也反复想了他unnecessary的意思。 原来知道支架是有一定寿命的，也听裘老师介绍过支架植入几年后就可能不行了，可能发生重新堵塞。这种情况发生，如何处理，是否需要重置或更换？希望听听裘老师的介绍和高见。我还是按教授的原话，把文字改正吧。