The present invention relates to medical devices; in particular, the present invention provides devices and methods for sensing thickness of cardiac tissue and the like so that medical procedures may be efficiently performed through and/or upon a discrete location having suitable tissue thickness. The...http://www.google.com/patents/US6755790?utm_source=gb-gplus-sharePatent US6755790 - Transseptal access tissue thickness sensing dilator devices and methods for fabricating and using same
