Electrosurgical wave generator
Inventors
Millis, Roger • Lewis, Ryan D. • Borgmeier, Paul R. • Greep, Darcy W. • Frampton, Chad S.
Assignees
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Publication Number
US-11446078-B2
Publication Date
2022-09-20
Expiration Date
Abstract
A portable, battery powered electrosurgical wave generator is usable in performing electrically driven medical procedures. The wave generator can be small and lightweight to enable a user to carry and use the wave generator in non-operating room type settings. The wave generator can include a control unit that generates output signals in each of a cutting mode, coagulation mode, and a bipolar mode. The control unit can use a single circuit structure to generate the output signals for the cutting, coagulation, and bipolar modes. The output signals can be generated solely from a voltage produced by an incorporated battery within the generator.
Core Innovation
The invention relates to an electrosurgical RF wave generator for performing electrically driven medical procedures. The wave generator includes a housing and a control unit disposed within the housing that generates and controls output signals to a monopolar electrosurgical instrument or a bipolar electrosurgical instrument. The system further includes first, second, and third electrical connections associated with the housing for selectively connecting the monopolar instrument, the bipolar instrument, and a return electrode, respectively.
The core arrangement configures the first, second, and third electrical connections relative to one another to enable simultaneous connection of the monopolar electrosurgical instrument to the first electrical connection and the return electrode to the third electrical connection. In addition, the arrangement prevents connection of the monopolar electrosurgical instrument to the first electrical connection and the return electrode to the third electrical connection when the bipolar electrosurgical instrument is connected to the second electrical connection.
The invention further supports multi-mode control output signals including cutting, coagulation, and bipolar modes. In the cutting mode, duty cycle is varied based on measured tissue impedance. In the bipolar mode, operation is characterized by constant-current then constant-power behavior as impedance changes, with impedance-threshold auto stop. In the coagulation mode, a flyback circuit provides constant power output signals without monitoring load impedance, with optional crest-factor and pulse timing control.
Claims Coverage
The provided material includes two independent claims (clm-00001 and clm-00028) with multiple dependent claims specifying additional structure and multi-mode signal-control behavior. Across the independent claims, the inventive coverage centers on a multi-connection electrical arrangement that permits safe monopolar+return simultaneous connection while preventing unsafe simultaneous connections when a bipolar instrument is connected, together with controlled output-signal generation for monopolar and bipolar operation.
Cross-connection arrangement preventing unsafe simultaneous monopolar/return and bipolar connections
An arrangement of a first electrical connection, a second electrical connection, and a third electrical connection configured to enable simultaneous connection of the monopolar electrosurgical instrument to the first electrical connection and the return electrode to the third electrical connection, and to prevent connection of the monopolar electrosurgical instrument to the first electrical connection and the return electrode to the third electrical connection when the bipolar electrosurgical instrument is connected to the second electrical connection.
Positioned bipolar connection between receptacles to prevent simultaneous return and bipolar connections
Positioning the second electrical connection between first and second receptacles of the second electrical connection relative to the third electrical connection, wherein the positioning prevents simultaneous connection of the return electrode to the third electrical connection and the bipolar electrosurgical instrument to the second electrical connection.
The independent claims define housing-based electrosurgical wave generators with selectively connectable monopolar, bipolar, and return electrical connections. The principal inventive coverage is the relative connection/receptacle positioning that permits simultaneous monopolar+return connection while preventing simultaneous return+bipolar connection.
Stated Advantages
Enables simultaneous connection of the monopolar electrosurgical instrument and the return electrode.
Prevents simultaneous connection of the return electrode and the bipolar electrosurgical instrument when the bipolar instrument is connected.
Provides multi-mode operation via a control unit generating and controlling cutting, coagulation, and bipolar output signals.
Documented Applications
Performing electrically driven medical procedures using a portable/battery-powered electrosurgical RF wave generator for cutting, coagulation, and bipolar modes.
Electrosurgical procedures involving a monopolar electrosurgical instrument, a bipolar electrosurgical instrument, and an associated return electrode.
Compatibility with a vessel sealing instrument.
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