Transcatheter patch

Due to the problems associated with devices containing metal, that is, arm fracture and embolization of parts, Sideris et al attempted to create a patch device that is alloy-free. This device, which is also produced by Custom Medical Devices, Amarillo, Texas, has been named the Transcatheter Patch. It is composed of polyurethane foam and nylon thread (Fig. 18.11). ° Advantages claimed when using a wireless device include minimal rim requirements and easier centering of the device. This is the only nonwire device to receive the CE mark for occlusion of heart defects. 

Images showing the transcatheter patch when flat and balloon expanded (Custom Medical Devices, Amarillo,Texas). 

Transcatheter Patch Polyurethane foam and nylon thread Range of heart defects N/A N/A... 

The polyurethane foam used in the Transcatheter Patch and the ButtonSeal devices has received some criticism due to its lack of biostability and potential to be carcinogenic, yet polyurethanes are currently being used as coatings on implantable devices, so the risk is unknown. - It is the authors contention, however, that improved, more biocompatible polymers, with similar if not superior properties, could be used for these devices. 

Sideris EB. Advances in transcatheter patch occlusion of heart defects. J Interv Cardiol 2003 16(5) 419 24. 

Custom Medical Devices Transcatheter Patch [Internet] [dted 2009 11 December 2009]. Available from http //www.custommedicaldevices.net/ educational-resources/physician/transcatheter-patch/. 

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