Monitoring and controlling energy delivery of an electrosurgical device

• US 20120215213A1
• Filed: 03/02/2012
• Published: 08/23/2012
• Est. Priority Date: 09/29/2006
• Status: Active Grant

• Current Assignee: Boston Scientific Medical Device Limited (Boston Scientific Corporation)
• Original Assignee: Baylis Medical Company
• Inventors: JUZKIW, TARAS, DANDY, JONATHAN
• Granted Patent: US 9,168,085 B2
• Time in Patent Office: Days
• US Class Current: 606/33
• CPC Class Codes: A61B 18/1233 with circuits for assuring patient safety
• CPC Class Codes: A61B 18/14 Probes or electrodes therefor
• CPC Class Codes: A61B 18/16 Indifferent or passive electrodes for grounding
• CPC Class Codes: A61B 2017/00119 alarm; indicating an abnormal situation
• CPC Class Codes: A61B 2018/00083 low, i.e. electrically insulating
• CPC Class Codes: A61B 2018/00214 Expandable means emitting energy, e.g. by elements carried thereon
• CPC Class Codes: A61B 2018/00601 Cutting
• CPC Class Codes: A61B 2018/00678 upper
• CPC Class Codes: A61B 2018/00702 Power or energy
• CPC Class Codes: A61B 2018/0072 Current
• CPC Class Codes: A61B 2018/00827 Current
• CPC Class Codes: A61B 2018/00875 Resistance or impedance
• CPC Class Codes: A61B 2018/00898 Alarms or notifications created in response to an abnormal condition
• CPC Class Codes: A61B 2018/1213 creating an arc
• CPC Class Codes: A61B 2018/141 Snare
• CPC Class Codes: A61B 8/12 in body cavities or body tracts, e.g. by using catheters catheters per se A61M25/00

Abstract

A method is disclosed for delivering energy to a region of tissue within a patient'"'"'s body using a medical treatment system. The medical treatment system comprises an energy delivery device coupled to an energy source. Energy is delivered through the energy delivery device positioned within the patient'"'"'s body. An energy delivery parameter associated with the delivery of energy by the medical treatment system is monitored and if one or more values of the energy delivery parameter exceed a predetermined magnitude threshold, one or more errors are detected. The extent of the detected errors is determined or assessed and the delivery of energy is controlled if the extent of the errors detected exceeds a sensitivity threshold before the expiry of a predetermined time period.

Claims

1. A method of delivering energy to a region of tissue within a patient'"'"'s body using a medical treatment system, said medical treatment system comprising an energy delivery device coupled to an energy source, the method comprising the steps of:

delivering energy through said energy delivery device;

monitoring a current output of said energy delivery device;

detecting one or more over-currents if the current output exceeds a predetermined magnitude threshold;

determining an extent of the over-currents detected over a predetermined time period; and

controlling the delivery of energy based on the extent of the over-currents detected.

2. A method of delivering energy to a region of tissue within a patient'"'"'s body using a medical treatment system, said medical treatment system comprising an energy delivery device coupled to an energy source, the method comprising the steps of:

delivering energy through said energy delivery device;

monitoring an energy delivery parameter associated with the delivery of energy by the medical treatment system;

detecting one or more errors if one or more values of the energy delivery parameter exceed a predetermined magnitude threshold;

determining or assessing an extent of the errors detected; and

controlling the delivery of energy if the extent of the errors detected exceeds a sensitivity threshold over a predetermined time period.

3. The method of claim 2, wherein the step of determining the extent of errors detected comprises determining a number of errors detected.

4. The method of claim 2, wherein the step of determining the extent of errors detected comprises determining a magnitude of the one or more values of the energy delivery parameter that exceed the predetermined magnitude threshold.

5. The method of claim 2, wherein the step of determining the extent of errors detected comprises determining a duration of time over which the one or more errors are detected.

6. The method of claim 2, wherein the energy delivery parameter is selected from the group consisting of:

current, voltage, impedance and power.

7. The method of claim 2, wherein the energy delivery device is a radiofrequency cutting device.

8. The method of claim 2, wherein the energy delivery device is a radiofrequency ablation device.