A - Human Necessities – 61 – F
Patent
A - Human Necessities
61
F
A61F 2/06 (2006.01)
Patent
CA 2220864
In Interventional Cardiology it is often a challenge to stent bifurcation lesions because of the potential for loss of side branches. In this invention, the incomplete coil design on each side allows each branch of the bifurcation to be accessed without compromising the other branch. This invention relates to a new type of coronary stent for angioplasty of bifurcation lesions. It has been common with previous stems to have wide spacing between coils to allow access to side branches with the guide wire but really no current stent has this incomplete coil design to allow complete access to side branches. The currently available stents often cause loss of side branches with the resultant undesirable consequences such as myocardial infarction or ischemia. I have found that the current disadvantages may be overcome by creating a stent with a coil design on one side and then just leaving the opposite side without any metal so that the side branch may be accessed with the second stent. This second stent is a mirror of the first stent with coils on the opposite side and free space again facing the bifurcation. In terms of the specific stent design it will be a coil design. I refer to Figure 1 which illustrates the current problem with "stent jail" where the stent covers the area of bifurcation. Figure 2 illustrates the complete coil portion going into the incomplete coil portion. Please note in Figure 3 how portion "A" of the stent is deployed first. Then portion "B" is deployed down the opposite arm of the bifurcation. The stent will be made of stainless steel. It will come in lengths of 10, 20, 30 and 40 mm. It will be delivered on a minimally compliant balloon without a sheath. The marker positions will be on either ends of the stent. */#/#/#/#/* will be how it will be marked. In the embodiment in the figures it is apparent how the side branch is protected as there is no metal to obstruct it.
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