Methods and apparatus for securing medical instruments to desired locations in a patient's body

摘要

A medical device for localization of tissue at a target site in a patient's body includes a tube having a distal end, a proximal end, and a longitudinal axis. The medical device is configured for placement of the distal end at the target site. A fixation device is disposed on the distal end. The affixation device is configured to mechanically fix the distal end of the medical device to tissue at the target site.

主权项

1. A medical device for localization of tissue at a target site in a patient's body, comprising:
a tube having a distal end, a proximal end, and a longitudinal axis, the medical device being configured for placement of said distal end at the target site; a fixation device disposed on said distal end, the fixation device having a Mallicot structure that is configured to radially expand to form a curved exterior surface that engages tissue surrounding the target site to mechanically fix the distal end of said medical device at the target site, wherein the fixation device has a radially expandable linkage having a plurality of linkage elements and a plurality of linkage pivot points; and an electrosurgical cutting element having a first end and a second end, the first end being coupled to the tube at a location proximal to the fixation device and the second end being coupled to the tube at a location distal to the fixation device.