Origami Stent
The metal tube would be folded into a thinner shape using a special origami pattern.
Origami stent. The concept of the origami stent is originated from the way of packaging a thin walled tube with the introduction of folding patterns. Basically origami stent has a cylindrical shape and the folds allow the change of its radius fig. Cells stretch and adhere across multiple microplates.
The pattern of folds on the foil was produced by negative photochemical etching. The basic pattern is shown below. Self deployable origami stent grafts as a biomedical application of ni rich tini shape memory alloy foil 1.
Oxford university researchers developed a heart stent that works using the traditional origami concept of a water bomb. The stent is usually employed as a tubular medical device used to protect weakened arterial walls in the human body but it can also be applied to increase stiļ¬ness of several systems includ ing pipes and oil drilling well. We harness the ctf as a biological driving force to fold the microstructures.
Unlike conventional stent grafts which consist of a wire mesh stent and a covering membrane the new origami stent graft is made from a single foldable foil with hill and valley folds. Medical uses stents in 2003 zhong you and kaori kuribayashi from the university of oxford developed an origami stent which may be used to enlarge clogged arteries and veins. A stent is a tube which can be collapse into a smaller size.
The roots between origami and advanced research run deep she adds. This paper describes a method of generating three dimensional 3d cell laden microstructures by applying the principle of origami folding technique and cell traction force ctf. Figure 1 shows such a pattern generated by abaqus hks which consists of a set of helical folds.
The origami stent is cylindrical while the medical stent is helical in design but the basic idea is the same. A shape memory alloy origami stent system is analyzed considering. In this research two different ni rich tini sma foils ti 50 7 at.
Manan arya an engineer at the jet propulsion laboratory has the nickname. To obtain these patterns we first looked into the buckling pattern of a tubular structure under torsion. It would then be inserted into an artery where body heat would cause it to unfold and expand holding the artery open.
Researchers from the university of oxford developed an origami stent graft a tube shaped medical device used to hold arteries open during surgery. The ni rich titanium nickel tini shape memory alloy sma foil made by the newly developed ultrafine laminates method was used in order to produce the stent graft. Developed by a british japanese team from oxford university the stent origami was used to create a prototype from stainless steel that can be reduced from a width of 23 to 12 mm writes susan bell of the la weekly.
If you pre crease the waterbomb based crease pattern and collapse it the result is an origami stent. The waterbomb base from origami was used to design the origami stent.
