A method for treating a sphincter provides a polymer material having a liquid state. The method also provides a catheter having a distal end, a tissue piercing device carried by the distal end, and an energy delivery device coupled to the tissue piercing device. The tissue piercing device has a lumen....http://www.google.es/patents/US7449020?utm_source=gb-gplus-sharePatente US7449020 - Method for treating a sphincter
