US 6,569,159 B1Granted

Cell necrosis apparatus

AssigneeRita Medical Systems, Inc.

InventorsStuart D. Edwards, James Baker, Hugh Sharkey, Ronald G. Lax

Life of this patent

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Abstract

A cell necrosis apparatus comprises an elongated delivery device including a lumen and an energy delivery device. The energy delivery device includes at least a first and a second RF electrode each with a tissue piercing distal portion. The first and second RF electrodes are positionable in the elongated delivery device in a compacted state and deployable from the elongated delivery device with curvature in a deployed state. The first and second RF electrodes exhibit a changing direction of travel when advanced from the elongated delivery device to a selected tissue site. At least one infusion port is coupled to one of the elongated delivery device, the energy delivery device, the first RF electrode or the second RF electrode.

Claims16

Dependent claims

A cell necrosis apparatus, comprising:

an elongated delivery device including a lumen;
an energy delivery device including at least a first and a second RF electrode each with a tissue piercing distal portion, the first and second RF electrodes being positionable in the elongated delivery device in a compacted state and being preformed to assume a curved shape when deployed, the first and second RF electrodes exhibiting a changing direction of travel when advanced from the elongated delivery device to a selected tissue site;
at least one of the elongated delivery device, or at least one of the first or second RF electrodes having an infusion lumen terminating in at least one infusion port for fluid delivery therethrough;
a source of RF power operatively connected to the energy delivery device for supplying RF power thereto, to ablate tissue at the tissue site, and
a measurement device operatively connected to the energy delivery device and to the RF power source for measuring at least one of the current or voltage at the tissue site.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/513,727Filed 24 Feb 2000 · continuation in part
Priority: 8 Nov 1993
Granted: 27 May 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification59 codes

A61B 18/1477
Probes or electrodes therefor: needle-like probes
A61B 18/1482
Probes or electrodes therefor: having a long rigid shaft for accessing the inner body transcutaneously in minimal invasive surgery, e.g. laparoscopy
A61B 18/18
Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body: by applying electromagnetic…
A61B 18/1815
By applying electromagnetic radiation, e.g. microwaves: using microwaves

Family

Application08/148,439Parent of this continuation-in-part · filed 8 Nov 1993
Application08/290,031Parent of this continuation-in-part · filed 12 Aug 1994
Application08/295,166Parent of this division · filed 24 Aug 1994
Application08/515,379Parent of this continuation-in-part · filed 15 Aug 1995
Application08/623,652Parent of this continuation · filed 29 Mar 1996
Application08/802,195Parent of this continuation · filed 14 Feb 1997
Application09/364,203Parent of this continuation-in-part · filed 30 Jul 1999
Application09/383,166Parent of this continuation-in-part · filed 25 Aug 1999
US 6,471,698 B1Parent of this continuation-in-part
Application09/383,166Parent of this continuation
US 6,071,280 AParent of this continuation
Application08/802,195Parent of this continuation-in-part
US 5,683,384 AParent of this continuation-in-part
US 5,536,267 AParent of this continuation-in-part
US 5,458,597 AParent of this continuation-in-part
Application09/364,203Parent of this continuation
US 5,935,123 AParent of this continuation
Application08/623,652Parent of this division
US 5,599,345 AParent of this division
Application08/295,166Parent of this continuation-in-part
US 2002/0035363 A1Published application
US 6,663,624 B2Related patent
US 6,569,159 B1This patent

From the US filing history. Foreign family members aren’t listed.