I was online trying to find research articles on episiotomies and I came across this device.
http://www.epi-no.co.uk/howitworks.asp
I was intrigued so I looked up research done on the device. Here are some that supports the claims made by the sellers of the product.
http://www.epino.de/pdf_downloads/Kovacs%20Studie.pdf
http://www.pelvicfloorwellness.com/files/ANZJOG_First_Epi-No_2009.pdf