| Patent application number | Description | Published |
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| 20110015627 | IMPEDANCE MONITORING APPARATUS, SYSTEM, AND METHOD FOR ULTRASONIC SURGICAL INSTRUMENTS - In one general aspect, various embodiments are directed to a surgical instrument that can supply mechanical energy and electrical energy to an end effector of the surgical instrument. The surgical instrument comprises an ultrasonic generator module coupled to an ultrasonic drive system, which comprises an ultrasonic transducer coupled to a waveguide and an end effector coupled to the waveguide. The ultrasonic drive system is configured to resonate mechanically at a resonant frequency to generate a first ultrasonic drive signal. An electronic circuit is coupled to the ultrasonic generator module to monitor an electrical characteristic of the ultrasonic drive system. A processor is coupled to the electronic circuit to control the ultrasonic drive signal in response to the monitored electrical characteristic of the ultrasonic drive system. | 01-20-2011 |
| 20110082486 | DEVICES AND TECHNIQUES FOR CUTTING AND COAGULATING TISSUE - Various embodiments are directed to an apparatus and method of driving an end effector coupled to an ultrasonic drive system of a surgical instrument. The method comprises generating at least one electrical signal. The at least one electrical signal is monitored against a first set of logic conditions. | 04-07-2011 |
| 20110087212 | SURGICAL GENERATOR FOR ULTRASONIC AND ELECTROSURGICAL DEVICES - A surgical device control circuit. The control circuit may comprise a first circuit portion comprising at least one first switch. The first circuit portion may communicate with a surgical generator over a conductor pair. The control circuit may also comprise a second circuit portion comprising a data circuit element. The data circuit element may be disposed in an instrument of the surgical device and transmit or receive data. The data circuit element may implement data communications with the surgical generator over at least one conductor of the conductor pair. | 04-14-2011 |
| 20110087213 | SURGICAL GENERATOR FOR ULTRASONIC AND ELECTROSURGICAL DEVICES - A surgical generator for providing a drive signal to a surgical device may have a receptacle assembly having a receptacle body, a flange and a central protruding portion. The outer periphery of the central protruding portion may have at least one curved section and at least one linear section. Additionally, a surgical instrument may comprise an electrical connector assembly having a flange. The flange may comprise at least one curved section and at least one linear section. In some embodiments, A surgical instrument system may comprise a surgical generator, a surgical instrument comprising a connector assembly, and an adapter assembly operatively coupled to the receptacle assembly and the connector assembly. | 04-14-2011 |
| 20110087215 | SURGICAL GENERATOR FOR ULTRASONIC AND ELECTROSURGICAL DEVICES - In accordance with various embodiments, methods to control electrical power provided to tissue via first and second electrodes may comprise providing a drive signal to the tissue via the first and second electrodes and modulating a power provided to the tissue via the drive signal based on a sensed tissue impedance according to a first power curve. The first power curve may define, for each of a plurality of potential sensed tissue impedances, a first corresponding power. The methods may also comprise monitoring a total energy provided to the tissue via the first and second electrodes. When the total energy reaches a first energy threshold, the methods may comprise determining whether an impedance of the tissue has reached a first impedance threshold. The methods may further comprise, conditioned upon the impedance of the tissue failing to reach the first impedance threshold, modulating the power provided to the tissue via the drive signal based on the sensed tissue impedance according to a second power curve. The second power curve may define, for each of the plurality of potential sensed tissue impedances, a second corresponding power. | 04-14-2011 |
| 20110087216 | SURGICAL GENERATOR FOR ULTRASONIC AND ELECTROSURGICAL DEVICES - In accordance with various embodiments, a surgical generator for providing a drive signal to a surgical device may comprise a first transformer and a second transformer. The first transformer may comprise a first primary winding and a first secondary winding. The second transformer may comprise a second primary winding and a second secondary winding. The surgical generator may further comprise a generator circuit to generate the drive signal. The generator circuit may be electrically coupled to the first primary winding to provide the drive signal across the first primary winding. The surgical generator may also comprise a patient-side circuit electrically isolated from the generator circuit. The patient-side circuit may be electrically coupled to the first secondary winding. Further, the patient-side circuit may comprise first and second output lines to provide the drive signal to the surgical device. In addition, the surgical generator may comprise a capacitor. The capacitor and the second secondary winding may be electrically coupled in series between the first output line and ground. | 04-14-2011 |
| 20110087256 | SURGICAL GENERATOR FOR ULTRASONIC AND ELECTROSURGICAL DEVICES - A method for determining motional branch current in an ultrasonic transducer of an ultrasonic surgical device over multiple frequencies of a transducer drive signal. The method may comprise, at each of a plurality of frequencies of the transducer drive signal, oversampling a current and voltage of the transducer drive signal, receiving, by a processor, the current and voltage samples, and determining, by the processor, the motional branch current based on the current and voltage samples, a static capacitance of the ultrasonic transducer and the frequency of the transducer drive signal. | 04-14-2011 |
