CA2503857A1 - Electrosurgical generator and method for detecting malfunction - Google Patents
Electrosurgical generator and method for detecting malfunction Download PDFInfo
- Publication number
- CA2503857A1 CA2503857A1 CA002503857A CA2503857A CA2503857A1 CA 2503857 A1 CA2503857 A1 CA 2503857A1 CA 002503857 A CA002503857 A CA 002503857A CA 2503857 A CA2503857 A CA 2503857A CA 2503857 A1 CA2503857 A1 CA 2503857A1
- Authority
- CA
- Canada
- Prior art keywords
- delivery
- output power
- power
- delivery path
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims 18
- 230000007257 malfunction Effects 0.000 title abstract 2
- 230000004913 activation Effects 0.000 claims 11
- 238000001514 detection method Methods 0.000 claims 6
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/1206—Generators therefor
- A61B18/1233—Generators therefor with circuits for assuring patient safety
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/1206—Generators therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00773—Sensed parameters
- A61B2018/00779—Power or energy
Abstract
Output power delivery from an electrosurgical generator is evaluated to avoid malfunctions and risk conditions. Output power is delivered in a selected delivery path and the flow of output power is sensed in the selected delivery path and other delivery paths which have not been selected. The output power delivery is terminated upon determining that output power is not flowing in the selected delivery path or that output power is flowing in a delivery path that was not selected.
Claims (21)
1. A method as defined in claim 21, further comprising:
determining whether the output power delivered is flowing in the selected delivery path; and terminating the delivery of output power upon determining that the delivered output power is not flowing in the selected delivery path.
determining whether the output power delivered is flowing in the selected delivery path; and terminating the delivery of output power upon determining that the delivered output power is not flowing in the selected delivery path.
2. A method as defined in claim 2, further comprising:
determining whether output power is flowing in each of the plurality of delivery paths.
determining whether output power is flowing in each of the plurality of delivery paths.
3. A method as defined in claim 2, further comprising:
sensing a flow of current caused by the delivered output power to determine whether electrosurgical energy is flowing in each delivery path.
sensing a flow of current caused by the delivered output power to determine whether electrosurgical energy is flowing in each delivery path.
4. A method as defined in claim 1, wherein the plurality of different delivery paths include a delivery path in which monopolar electrosurgical power flows and a delivery path in which bipolar electrosurgical power flows.
5. A method as defined in claim 1, wherein one of the delivery paths includes an output relay which conducts current caused by the electrosurgical output power upon closure of the output relay, and the method further comprises:
selecting the delivery path which includes the output relay as the delivery path for the delivery of the output power;
applying a relay closure signal to the output relay to close the output relay in response to the activation request; and determining whether the output relay closed in response to the relay closure signal by sensing current flowing through the delivery path which includes the output relay as a result of delivering the output power.
selecting the delivery path which includes the output relay as the delivery path for the delivery of the output power;
applying a relay closure signal to the output relay to close the output relay in response to the activation request; and determining whether the output relay closed in response to the relay closure signal by sensing current flowing through the delivery path which includes the output relay as a result of delivering the output power.
6. A method as defined in claim 5, further comprising:
terminating the delivery of output power upon determining that the relay closure signal did not result in the flow of delivered output power through the selected delivery path which includes the output relay.
terminating the delivery of output power upon determining that the relay closure signal did not result in the flow of delivered output power through the selected delivery path which includes the output relay.
7. A method as defined in claim 6, further comprising:
sensing current flowing in each of the plurality of delivery paths in response to the delivery of the output power;
determining whether current is flowing in any delivery path other than the selected delivery path which includes the output relay; and terminating the delivery of output power upon determining that the delivered output power is flowing in any delivery path other than the selected delivery path which includes the output relay.
sensing current flowing in each of the plurality of delivery paths in response to the delivery of the output power;
determining whether current is flowing in any delivery path other than the selected delivery path which includes the output relay; and terminating the delivery of output power upon determining that the delivered output power is flowing in any delivery path other than the selected delivery path which includes the output relay.
8. A method as defined in claim 5, wherein at least two of the plurality of delivery paths each include an output relay which conducts current caused by the electrosurgical output power upon closure of the output relay associated with the each of those delivery paths, and the method further comprises:
deriving current sense signals indicative of current flowing in each delivery path in which an output relay is included;
determining whether the presence and absence of relay closure signals applied to each output relay correlate with the current sense signals;
and terminating the delivery of output power upon determining the presence and absence of relay closure signals do not correlate with the current sense signals indicating the presence and absence of current flowing in the delivery paths.
deriving current sense signals indicative of current flowing in each delivery path in which an output relay is included;
determining whether the presence and absence of relay closure signals applied to each output relay correlate with the current sense signals;
and terminating the delivery of output power upon determining the presence and absence of relay closure signals do not correlate with the current sense signals indicating the presence and absence of current flowing in the delivery paths.
9. A method of determining delivery conditions of output electrosurgical power from an electrosurgical generator which has a plurality of delivery paths through which the output power can be delivered, comprising:
delivering the output power in response to an activation request for the delivery of electrosurgical output power;
commanding the delivery of the output power through a selected one of the plurality of delivery paths;
delivering the output power in response to the commanding the delivery of the output power;
sensing the flow of output power in each of the plurality of delivery paths;
determining whether the delivery path in which output power is flowing correlates with the selected one delivery path;
determining whether each delivery path in which output power is not flowing correlates to a delivery path for which output power delivery has not been commanded;
terminating the delivery of output power upon determining that the delivered output power is not flowing in the selected delivery path; and terminating the delivery of output power upon determining that the delivered output power is flowing in any delivery path other than the selected one delivery path.
delivering the output power in response to an activation request for the delivery of electrosurgical output power;
commanding the delivery of the output power through a selected one of the plurality of delivery paths;
delivering the output power in response to the commanding the delivery of the output power;
sensing the flow of output power in each of the plurality of delivery paths;
determining whether the delivery path in which output power is flowing correlates with the selected one delivery path;
determining whether each delivery path in which output power is not flowing correlates to a delivery path for which output power delivery has not been commanded;
terminating the delivery of output power upon determining that the delivered output power is not flowing in the selected delivery path; and terminating the delivery of output power upon determining that the delivered output power is flowing in any delivery path other than the selected one delivery path.
10. A method as defined in claim 9, further comprising:
selecting the one delivery path to which to command a delivery of the output power in response to the activation request.
selecting the one delivery path to which to command a delivery of the output power in response to the activation request.
11. A method as defined in claim 10, wherein the electrosurgical generator includes first and second processors, and the method further comprises:
executing a procedure on the first processor in response to the activation request to select the one delivery path and to command the delivery of the output power through the selected one path; and executing a procedure on the second processor in response to the command for delivery of the output power through the selected one delivery path and in response to current sensed in the plurality of delivery paths to determine the correlation of flow of output power in the commanded delivery path and the absence of the flow of output power in each delivery path other than the selected one delivery path.
executing a procedure on the first processor in response to the activation request to select the one delivery path and to command the delivery of the output power through the selected one path; and executing a procedure on the second processor in response to the command for delivery of the output power through the selected one delivery path and in response to current sensed in the plurality of delivery paths to determine the correlation of flow of output power in the commanded delivery path and the absence of the flow of output power in each delivery path other than the selected one delivery path.
12. An electrosurgical generator which delivers electrosurgical output power in response to an activation signal, comprising:
an electrosurgical power creation circuit which is operative in response to an enable signal to create the output power;
a delivery path connected to the power creation circuit and through which the output power is delivered from the electrosurgical generator;
a selectively controllable power flow switch connected in the delivery path to conduct the output power through the delivery path in response to an assertion of a power command signal to the power flow switch and to prevent conduction of the output power through the delivery path in response to the de-assertion of the power command signal;
a controller receptive of the activation signal and operative to supply the enable signal to the power creation circuit and to assert the command signal to the power flow switch in response to the activation signal, the controller further operative to withdraw the enable signal to the power creation circuit and to de-assert the command signal to the power flow switch in response to the absence of the activation signal;
a sensor connected in the delivery path to sense the flow of electrosurgical power through the delivery path and to assert a sense signal upon sensing the presence of the output power flowing in the delivery path and to de-assert the sense signal upon sensing the absence of output power flowing in the delivery path; and a detection circuit receptive of the command signal and the sense signal and responsive to an inconsistency in one of the simultaneous assertion of the command and sense signals or the simultaneous de-assertion of the command and sense signals, the detection circuit terminating the supply of the enable signal to the electrosurgical power creation circuit upon detection of the inconsistency.
an electrosurgical power creation circuit which is operative in response to an enable signal to create the output power;
a delivery path connected to the power creation circuit and through which the output power is delivered from the electrosurgical generator;
a selectively controllable power flow switch connected in the delivery path to conduct the output power through the delivery path in response to an assertion of a power command signal to the power flow switch and to prevent conduction of the output power through the delivery path in response to the de-assertion of the power command signal;
a controller receptive of the activation signal and operative to supply the enable signal to the power creation circuit and to assert the command signal to the power flow switch in response to the activation signal, the controller further operative to withdraw the enable signal to the power creation circuit and to de-assert the command signal to the power flow switch in response to the absence of the activation signal;
a sensor connected in the delivery path to sense the flow of electrosurgical power through the delivery path and to assert a sense signal upon sensing the presence of the output power flowing in the delivery path and to de-assert the sense signal upon sensing the absence of output power flowing in the delivery path; and a detection circuit receptive of the command signal and the sense signal and responsive to an inconsistency in one of the simultaneous assertion of the command and sense signals or the simultaneous de-assertion of the command and sense signals, the detection circuit terminating the supply of the enable signal to the electrosurgical power creation circuit upon detection of the inconsistency.
13. An electrosurgical generator as defined in claim 12, further comprising:
a plurality of the power delivery paths, each of the delivery paths including one power flow switch and one sensor; and wherein:
the detection circuit is receptive of the command and sense signals from each delivery path and responds to an inconsistency in the assertion and de-assertion of the command and sense signals in all of the delivery paths to terminate the enable signal.
a plurality of the power delivery paths, each of the delivery paths including one power flow switch and one sensor; and wherein:
the detection circuit is receptive of the command and sense signals from each delivery path and responds to an inconsistency in the assertion and de-assertion of the command and sense signals in all of the delivery paths to terminate the enable signal.
14. An electrosurgical generator as defined in claim 13, further comprising:
a processor, and wherein:
the controller and the detection circuit are included within the processor.
a processor, and wherein:
the controller and the detection circuit are included within the processor.
15. An electrosurgical generator as defined in claim 13, further comprising:
first and second separate processors which are operatively interconnected with one another; and wherein:
the first processor includes the controller; and the second processor includes the detection circuit.
first and second separate processors which are operatively interconnected with one another; and wherein:
the first processor includes the controller; and the second processor includes the detection circuit.
16. An electrosurgical generator as defined in claim 15, further comprising:
a third processor which is separate from the first and second processors: and wherein:
the third processor is operatively connected to the first and second processors; and the third processor is connected to and controls the electrosurgical power creation circuit.
a third processor which is separate from the first and second processors: and wherein:
the third processor is operatively connected to the first and second processors; and the third processor is connected to and controls the electrosurgical power creation circuit.
17. An electrosurgical generator as defined in claim 13, wherein:
the power flow switch in one delivery path includes an output relay; and the power command signal to the power flow switch which includes the output relay comprises a relay closure signal.
the power flow switch in one delivery path includes an output relay; and the power command signal to the power flow switch which includes the output relay comprises a relay closure signal.
18. An electrosurgical generator as defined in claim 17, wherein:
the sensor in the one delivery path which includes the output relay comprises a current sensor to sense current flowing in the one delivery path in response to the delivery of the output power.
the sensor in the one delivery path which includes the output relay comprises a current sensor to sense current flowing in the one delivery path in response to the delivery of the output power.
19. An electrosurgical generator as defined in claim 17, wherein:
the electrosurgical power creation circuit creates monopolar output power and bipolar output power; and the monopolar output power is delivered through the delivery path which includes the output relay.
the electrosurgical power creation circuit creates monopolar output power and bipolar output power; and the monopolar output power is delivered through the delivery path which includes the output relay.
20. An electrosurgical generator as defined in claim 19, wherein:
the bipolar output power is delivered through a bipolar delivery path which is different from the delivery path which includes the output relay;
the electrosurgical power creation circuit includes an output section; and the power flow switch connected in the bipolar delivery path is included within the output section.
the bipolar output power is delivered through a bipolar delivery path which is different from the delivery path which includes the output relay;
the electrosurgical power creation circuit includes an output section; and the power flow switch connected in the bipolar delivery path is included within the output section.
21. A method of determining delivery conditions of output electrosurgical power from an electrosurgical generator in which the electrosurgical power is delivered in response to an activation request for output power, comprising:
selecting one of a plurality of different delivery paths for the delivery of the output power based on the activation request;
delivering output power in response to the activation request;
determining whether the output power delivered is flowing in any delivery path other than the selected delivery path; and terminating the delivery of output power if the output power is flowing in any delivery path other than the selected delivery path.
selecting one of a plurality of different delivery paths for the delivery of the output power based on the activation request;
delivering output power in response to the activation request;
determining whether the output power delivered is flowing in any delivery path other than the selected delivery path; and terminating the delivery of output power if the output power is flowing in any delivery path other than the selected delivery path.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/300,703 US6830569B2 (en) | 2002-11-19 | 2002-11-19 | Electrosurgical generator and method for detecting output power delivery malfunction |
| US10/300,703 | 2002-11-19 | ||
| PCT/US2003/033786 WO2004045437A1 (en) | 2002-11-19 | 2003-10-27 | Electrosurgical generator and method for detecting malfunction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2503857A1 true CA2503857A1 (en) | 2004-06-03 |
| CA2503857C CA2503857C (en) | 2010-11-09 |
Family
ID=32297948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2503857A Expired - Lifetime CA2503857C (en) | 2002-11-19 | 2003-10-27 | Electrosurgical generator and method for detecting malfunction |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US6830569B2 (en) |
| EP (1) | EP1562504B1 (en) |
| JP (1) | JP4731166B2 (en) |
| CN (1) | CN1713858A (en) |
| AT (1) | ATE417562T1 (en) |
| AU (1) | AU2003302082A1 (en) |
| CA (1) | CA2503857C (en) |
| DE (1) | DE60325407D1 (en) |
| WO (1) | WO2004045437A1 (en) |
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-
2002
- 2002-11-19 US US10/300,703 patent/US6830569B2/en not_active Expired - Lifetime
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- 2003-10-27 CN CNA2003801036782A patent/CN1713858A/en active Pending
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- 2003-10-27 EP EP03811606A patent/EP1562504B1/en not_active Expired - Lifetime
- 2003-10-27 DE DE60325407T patent/DE60325407D1/en not_active Expired - Lifetime
- 2003-10-27 AU AU2003302082A patent/AU2003302082A1/en not_active Abandoned
- 2003-10-27 CA CA2503857A patent/CA2503857C/en not_active Expired - Lifetime
- 2003-10-27 AT AT03811606T patent/ATE417562T1/en not_active IP Right Cessation
- 2003-10-27 JP JP2004553474A patent/JP4731166B2/en not_active Expired - Fee Related
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| JP4731166B2 (en) | 2011-07-20 |
| JP2006506173A (en) | 2006-02-23 |
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| DE60325407D1 (en) | 2009-01-29 |
| WO2004045437A1 (en) | 2004-06-03 |
| CA2503857C (en) | 2010-11-09 |
| EP1562504B1 (en) | 2008-12-17 |
| AU2003302082A1 (en) | 2004-06-15 |
| CN1713858A (en) | 2005-12-28 |
| ATE417562T1 (en) | 2009-01-15 |
| US6830569B2 (en) | 2004-12-14 |
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