What are ASD closure devices?

Q: 1. Is there any life period for ASD Closure device Amplatzen? 2. I heard that there are 2 types of Amplitiser available in the market - i) American made - cost around Rs 95,000/- & ii) Chinese made - cost Rs 60,000/-. Please let me know the difference between the two. 3. Is there any possibility of displacement of the Amplitiser [post operation] if there is any pressure difference between the two arteries.

A:(1) The Amplatzen device for ASD closure is an implant that lasts a lifetime. So far almost 10,000 devices have been implanted worldwide and its safety is established. (2) The China device has so far not been tested in clinical trials and the results achieved with the standard device cannot be extrapolated to this device. The safety of this device remains to be established. (3) Displacement of the device after implantation is rare. It has never been seen to occur after one month of implantation.