{"id":529,"date":"2011-12-02T17:55:21","date_gmt":"2011-12-02T22:55:21","guid":{"rendered":"http:\/\/www.ptca.org\/voice\/?p=529"},"modified":"2012-10-20T01:32:07","modified_gmt":"2012-10-20T05:32:07","slug":"stent-as-concertina","status":"publish","type":"post","link":"http:\/\/www.ptca.org\/voice\/2011\/12\/02\/stent-as-concertina-529","title":{"rendered":"Stent as Concertina"},"content":{"rendered":"

\"ACall it an accordian, a concertina or a “squeezebox”…but don’t call it a stent. Because one thing that is not music to your ears is a coronary stent that you have carefully placed to relieve your patient’s symptoms — and which then gets shorter or longer when you push or pull another catheter, balloon or wire through it.<\/span><\/p>\n

This is an issue that was first raised a little over a month ago and it has been the subject of a number of news articles. It’s been dubbed “the concertina effect” but its scientific name is “longitudinal stent compression” or “longitudinal stent distortion” and it’s of concern because once a stent has been correctly sized and placed in just the right position to keep a blockage open…well, you don’t want it moving or changing shape.<\/p>\n

Yet this can occur during an angioplasty — rarely, but more often in some particular stents than in others, according to a bench-test that was published this week in JACC Cardiovascular Interventions<\/a>.<\/p>\n

For a complete report on this bench-test, read our article, “New Boston Scientific Stent Shows Significant Shortening Compared to Other 2nd Generation DES<\/a>” and, if you are an interventional cardiologist, read our follow up piece, “Avoiding and Repairing Coronary Stent Distortion<\/a>“, which contains tips and tricks from Dr. John A. Ormiston, lead author of the JACC study.<\/p>\n","protected":false},"excerpt":{"rendered":"

Call it an accordian, a concertina or a “squeezebox”…but don’t call it a stent. 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