Methods for making magnesium biodegradable stents for medical implant applications
AssigneeUniversity of Cincinnati
InventorsVESSELIN N. SHANOV, PRABIR ROY-CHAUDHURY, MARK J. SCHULZ, ZHANGZHANG YIN, BEGONA CAMPOS-NACIFF, YANG WANG
Life of this patent
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Abstract
Methods for making a magnesium biodegradable stent for medical implant applications, using magnesium foil or pure magnesium or magnesium alloys that are biodegradable and performing a lithographic technique to configure the features and dimensions of the magnesium foil, and rolling the magnesium foil to form a cylinder.
Claims41
A method for making a magnesium biodegradable stent for medical implant applications comprising
- providing magnesium foil comprising pure magnesium or magnesium alloys that are biodegradable;
- performing a lithographic technique to configure the features and dimensions of the magnesium foil wherein the lithographic technique is used to transfer the stent features to both sides of the magnesium foil, wherein the lithographic technique is selected form at least one of optical photolithography, electron beam lithography, x-ray lithography, and nanoimprint lithography, or a combination of these techniques;
- etching the magnesium foil;
- and
- rolling the magnesium foil to form a cylinder.
A magnesium biodegradable stent for medical implant applications comprising a cylinder comprising magnesium foil comprising pure magnesium or magnesium alloys that are biodegradable, wherein the cylinder is configured to be balloon-expandable, and the cylinder has a longitudinal gap between the two edges along a longitudinal length of the cylinder, and the cylinder is configured such that the two edges along the longitudinal length overlap each other such that a spiral is formed as seen from a side view looking down the longitudinal length of the stent.
A magnesium biodegradable stent for medical implant applications comprising a cylinder comprising magnesium boil comprising pure magnesium or magnesium alloys that are biodegradable, wherein the cylinder is configured to be balloon-expandable, has an upper and a lower ring, the rings being at each end along the longitudinal length of the cylinder, and where the upper and lower rings are discontinuous and have no longitudinal sections of a welded seam between circumferential struts on the stent, such that the stent is stress-free with regards to longitudinal contraction of the stent and such that bending of the stent is prevented and overstressing or breaking of meandering wire connections between the struts is also prevented when the stent is expanded.
A method for placement of a magnesium biodegradable stent for medical implantations comprising:
- providing a stent comprising a magnesium biodegradable stent for medical implant applications comprising a cylinder comprising magnesium foil comprising pure magnesium or magnesium alloys that are biodegradable, wherein the cylinder is configured to be balloon-expandable, and the cylinder has a longitudinal gap between the two edges along a longitudinal length of the cylinder, and the cylinder is configured such that the two edges along the longitudinal length overlap each other such that a spiral is formed as seen from a side view looking down the longitudinal length of the stent:
- anesthetizing a patient;
- surgically prepping the patient;
- giving pre-emptive analgesics to the patient;
- incising the site of surgery as appropriate for subsequent arteriovenous placement;
- creating an arteriovenous fistulae with an end to side anastomosis between an artery and a vein;
- crimping the stent;
- putting a sleeve on the stent;
- inserting the stent into the vein;
- positioning the stent so a first end of the stent is aligned with an open end of the dissected vein;
- suturing the vein to the artery;
- incising the artery across the anastomosis;
- inserting a balloon via the incision in the artery to the stent;
- expanding the balloon to expand the stent;
- and
- suturing the incision in the artery.
41-59. (canceled)
Dependencies are inferred from the claim text.