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Individually optimizing cardiac and vascular implants based on a template device

IP.com Disclosure Number: IPCOM000250422D
Publication Date: 2017-Jul-13
Document File: 2 page(s) / 37K

Publishing Venue

The IP.com Prior Art Database

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Individually optimizing cardiac and vascular implants based on a template device

Current stents and stent-like devices are not optimized on an individual patient

level. Using the below process the most optimal shape of a stent can be constructed

for each case.

A patient specific device may be created on the basis of a 3D mold that

corresponds with the patient anatomy in which the device is to be implanted. The 3D

mold is created according to a 3D model that is obtained by medical imaging and


Main aspects of such process include:

 The device (stent) is made of a material that allows the unloaded end-shape to

be adapted, for instance by its internal stresses to be relieved. This can be

accomplished by using a shape memory alloy that is deformed in the required

shape after which it undergoes a temperature treatment to make this shape its

equilibrium shape at operating temperature. Another possibility is to use an

elasto-plastic material and deform the device in the desired configuration after

which the internal stresses can be released using a temperature treatment.

 A virtual 3D model of the targeted area (e.g. vessel or heart) needs be

generated. This can be accomplished through medical imaging (CT, US, MRI)

and segmentation.

 A virtual computational physics model of the device.

 A 3D printer for printing a representation of the anatomy capable of being

used as a mold for the reshaping of the implant.

The following steps are performed in the process:

 Ste...