Electrosurgical generators and sensors
AssigneeCovidien LP
InventorsDEAN C. BUCK, EDWARD L. BRANNAN, MARK A. JOHNSTON
Life of this patent
Estimating the term…
Abstract
An electrosurgical generator includes a radio frequency output stage configured to output at least one radio frequency waveform and a sensor for sensing current. The sensor includes a current sensor coil having: an outer coil, an inner coil coupled to and disposed within the outer coil, and at least one shielding member disposed over the outer coil. Each of the at least one shielding member and the outer coil define an opening therethrough. The generator also includes at least one active lead coupled to the radio frequency output stage and passing through the current sensor coil. The current sensor coil is configured to output a signal indicative of a current within the at least one active lead.
Claims21
1-20. (canceled)
A sensor for sensing current, the sensor comprising:
- a current sensor coil defining an opening therethrough and having a top surface and a bottom surface;
- and
- an active lead passing through the opening of the current sensor coil, the active lead including:
- a top portion extending parallel with and over the top surface of the current sensor coil at a first non-zero acute angle relative to an axis that extends through a first end of the current sensor coil and a center of the opening of the current sensor coil;
- and
- a bottom portion extending parallel with and over the bottom surface of the current sensor coil at a second non-zero acute angle relative to the axis, the first non-zero acute angle and the second non-zero acute angle being symmetrical relative to each other about the axis.
An electrosurgical generator, comprising:
- a radio frequency output stage configured to output at least one radio frequency waveform;
- a sensor including:
- a current sensor coil defining an opening therethrough and having a top surface and a bottom surface;
- and
- an active lead passing through the opening of the current sensor coil, the active lead including:
- a top portion extending parallel with and over the top surface of the current sensor coil at a first non-zero acute angle relative to an axis that extends through a first end of the current sensor coil and a center of the opening of the current sensor coil;
- and
- a bottom portion extending parallel with and over the bottom surface of the current sensor coil at a second non-zero acute angle relative to the axis, the first non-zero acute angle and the second non-zero acute angle being symmetrical relative to each other about the axis.
Dependencies are inferred from the claim text.