US 12,642,587 B2Granted

Electrosurgical system and method for determining an electrode type of a neutral electrode

AssigneeErbe Elektromedizin GmbH

InventorPhilipp Maier

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Abstract

Embodiments disclosed include an electrosurgical system as well as a method. The electrosurgical system and the method (are configured to determine an electrode type (T1, T2, T3) of a neutral electrode by applying an alternating measurement signal to the neutral electrode at least at two different measurement frequencies (f1, f2). At each measurement frequency (f1, f2) an impedance absolute value (ZNabs) or a phase value (φ) or both is determined for the neutral electrode impedance (ZN) of neutral electrode. When at least one impedance absolute value (ZNabs) and at least one phase value (φ) is determined, and based on the at least one impedance absolute value (ZNabs) and the at least one phase value (φ), the electrode type (T1, T2, T3) of the connected neutral electrode is determined by comparison with known comparison values for the at least one impedance absolute value (ZNabs) and the at least one phase value (φ).

Claims15

Dependent claims

A Method for determining an electrode type of a neutral electrode comprising the following steps:

attaching the neutral electrode to a patient so that an electrically conductive connection exists between the neutral electrode and the patient,
applying an alternating measurement signal at least at two different measurement frequencies to the neutral electrode respectively,
determining at least one impedance absolute value of a neutral electrode impedance of the neutral electrode for at least one of the at least two different measurement frequencies,
determining at least one phase value of the neutral electrode impedance of the neutral electrode for at least one of the at least two different measurement frequencies,
determining an electrode type of the connected neutral electrode based on the at least one impedance absolute value and the at least one phase value;
and,
setting at least one of an electric power limit, a current limit, and/or an operating mode of an electrosurgical system based on the determined electrode type.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/136,754Filed 19 Apr 2023
Priority: EP 2216924821 Apr 2022
Published: US 2023/0338078 A126 Oct 2023
Granted: 2 Jun 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

A61B 18/16
Probes or electrodes therefor: indifferent or passive electrodes for grounding
A61B 18/1233
Generators therefor: with circuits for assuring patient safety
A61B 18/14
By passing a current through the tissue to be heated, e.g. high-frequency current: probes or electrodes therefor
A61B 2018/00577
For achieving a particular surgical effect: ablation