An RF treatment apparatus includes a catheter with a catheter lumen. A removable needle electrode is positioned in the catheter lumen in a fixed relationship to the catheter. The needle electrode includes a needle lumen and a needle electrode distal end. A removable introducer is slidably positioned in the needle lumen. The introducer includes an introducer distal end. A first sensor is positioned on a surface of the needle electrode or the insulator. An RF power source is coupled to the needle electrode and a return electrode. An insulator sleeve is slidably positioned around the electrode and includes a second sensor. Resources are associated with the electrodes, sensors as well as the RF power source for maintaining a selected power at the electrode independent of changes in current or voltage.
申请公布号
US5935123(A)
申请公布日期
1999.08.10
申请号
US19960623652
申请日期
1996.03.29
申请人
RITA MEDICAL SYSTEMS, INC.
发明人
EDWARDS, STUART D.;BAKER, JAMES;STRUL, BRUNO;LAX, RONALD G.