发明授权
- 专利标题: Electrical discharge devices and techniques for medical procedures
- 专利标题(中): 用于医疗程序的放电装置和技术
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申请号: US11065180申请日: 2005-02-23
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公开(公告)号: US07220261B2公开(公告)日: 2007-05-22
- 发明人: Csaba Truckai , John H. Shadduck
- 申请人: Csaba Truckai , John H. Shadduck
- 申请人地址: US CA Saratoga
- 专利权人: Sciogen, Inc.
- 当前专利权人: Sciogen, Inc.
- 当前专利权人地址: US CA Saratoga
- 代理机构: Townsend and Townsend and Crew LLP
- 主分类号: A61B18/18
- IPC分类号: A61B18/18
摘要:
A medical instrument coupled to first and second energy means and a computer controller for the controlled volumetric removal of thin tissue layers. The system provides a source for introducing a gas to controllably form and capture transient gas volumes in a microchannel structure at the working surface of the instrument that interfaces with a targeted tissue site. Each of the microchannel features of the working surface carries an electrode element coupled to the electrical source. The energy may be applied to the targeted site in either of two modes of operation, depending in part on voltage and repetition rate of energy delivery. In one mode of energy application, electrical potential is selected to cause an intense electrical arc across the transient ionized gas volumes to cause an energy-tissue interaction characterized by tissue vaporization. In another preferred mode of energy delivery, the system applies selected levels of energy to the targeted site by means of an energetic plasma at the instrument working surface to cause molecular volatilization of surface macromolecules thus resulting in material removal. Both modes of operation limit collateral thermal damage to tissue volumes adjacent to the targeted site. Another preferred embodiment provides and an ultrasound source or other vibrational source coupled to the working end to cause cavitation in fluid about the working end.