A medical instrument for engaging tissue includes a flexible shaft, a tissue piercing coil at a distal portion of the shaft, and a tissue stabilizer positioned over the shaft and biased in a distal direction such that as the tissue piercing coil enters tissue, the tissue stabilizer is urged against a...http://www.google.es/patents/US20040193117?utm_source=gb-gplus-sharePatente US20040193117 - Tissue reconfiguration
