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公开(公告)号：US20230069467A1
公开(公告)日：2023-03-02
申请号：US17884856
申请日：2022-08-10
发明人： Jelle DIJKSTRA
IPC分类号： A61B18/12
摘要： An electrosurgical generator for generating a high-frequency AC voltage for an electrosurgical instrument, having a high-voltage inverter that generates and outputs a high-frequency AC voltage. A filter having a parallel capacitor is on an output line. A measuring sensor circuit having a current divider, which has a capacitive coupling to a series-connected shunt as bypass with respect to the parallel capacitor, and having a voltage detection circuit connected to the shunt. The shunt has a considerably lower impedance than the capacitive coupling. This gives rise to a proportional ratio between the current flowing through the parallel capacitor on the output line of the electrosurgical generator and the current through the shunt. This current is converted into a voltage, which is detected. The current at the output of the inverter is determined quickly and accurately thanks to the proportional relationship. This may be used for feedback and improved monitoring and regulation.
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公开(公告)号：US20210022793A1
公开(公告)日：2021-01-28
申请号：US16979664
申请日：2019-02-16
发明人： Jelle DIJKSTRA
IPC分类号： A61B18/12
摘要： A testing device for an electrosurgical generator, including a first connection port and a second connection port for connecting the testing device to a patient circuit of the electrosurgical generator and including an apparatus for producing a direct voltage between the first connection port and the second connection port. The testing device is characterized in that an HF current path of the patient circuit, running from the first connection port to the second connection port, extends through the testing device and in that the apparatus for producing a direct voltage is fed by an HF current flowing through the HF current path.
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公开(公告)号：US20230310020A1
公开(公告)日：2023-10-05
申请号：US18168909
申请日：2023-02-14
发明人： Jelle DIJKSTRA , Stefan DIETRICH , Dimitri BECKER
CPC分类号： A61B17/320068 , H03H7/38 , A61B2017/320082 , A61B2018/0063
摘要： A surgical generator configured to output a high-frequency alternating voltage to a surgical ultrasound instrument. An oscillator generates a driving oscillation for an inverter generating high-frequency voltage being for the surgical instrument. A matching-coil emulation device includes a correction device acting on the driving oscillation. The correction device includes a mixing unit and a feedback circuit, modifying the driving oscillation supplied to the inverter. An estimator calculates a virtual current which would flow in the emulated matching-coil if it were present, based on this and a measured output voltage an artificial phase shift is determined for steering of the oscillator. Thereby, the transfer function is reshaped mimicking that of a physical matching coil. Accordingly, a bulky matching coil that must be precisely tuned to the ultrasound instrument and restricts use of newer and different ultrasound instruments is no longer needed.
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公开(公告)号：US20210298811A1
公开(公告)日：2021-09-30
申请号：US17216091
申请日：2021-03-29
摘要： An electrosurgical generator supplies, during operation, a high-frequency alternating current to an electrosurgical instrument for plasma cutting of body tissue. The electrosurgical generator has outputs for connecting an electrosurgical instrument to supply an electrosurgical instrument connected to the outputs with a high-frequency alternating current, and for determining the impedance of a load connected to the outputs. The electrosurgical generator features impedance and voltage measuring units as well as an output voltage control unit. The output voltage control unit is designed to control the AC output voltage depending on a maximum output voltage value that is set during operation depending on an output value of the impedance measuring unit and/or depending on an output value of the voltage measuring unit, such that the maximum output voltage value predefines a lower AC output voltage during a vaporization phase than during an ignition phase occurring subsequently to the vaporization phase.
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公开(公告)号：US20240206946A1
公开(公告)日：2024-06-27
申请号：US18391921
申请日：2023-12-21
发明人： Jelle DIJKSTRA , Fabian Janich , Thomas Fähsing , Daniel Ramin
IPC分类号： A61B18/12
CPC分类号： A61B18/1206 , A61B2018/00702 , A61B2018/126
摘要： An Electrosurgical generator including an inverter unit generating a high-frequency alternating voltage to be supplied to at least two output sockets for connection of electrosurgical instruments. The inverter unit is a multilevel inverter. It includes a plurality of co-operating inverter cells which are connected in a cascaded manner in a first state and being split into at least two groups (I, II) in a second state. The inverter unit is selectively switchable between said first and second state. Each group is assigned one of the output sockets and feeds its HF voltage thereto. This enables simultaneous controlling of the distinct groups and their HF output. Thereby, unwanted interference patterns can be avoided. Uncontrolled low-frequency beat can be largely suppressed, allowing improved control of thermal energy and cutting power. Quality of the work performed can be increased which is beneficial for the patient.
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公开(公告)号：US20220192726A1
公开(公告)日：2022-06-23
申请号：US17549041
申请日：2021-12-13
发明人： Jelle DIJKSTRA , Stefan SCHIDDEL
摘要： An electrosurgical generator for providing different high-frequency alternating voltages/high-frequency alternating currents includes at least two outputs to which an electrosurgical instrument is or can be connected, at least one high-frequency voltage source, and at least two output transformers connected on the primary side to the high-frequency voltage source and on the secondary side to the outputs for an electrosurgical instrument, wherein both the primary windings of the output transformers can be interconnected via switches and the secondary windings of the output transformers can be interconnected via switches.
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公开(公告)号：US20210015539A1
公开(公告)日：2021-01-21
申请号：US16979773
申请日：2019-03-12
发明人： Jelle DIJKSTRA
IPC分类号： A61B18/12
摘要： A high-frequency generator connects an electrosurgical instrument, including an electrical output connection point for an electrosurgical instrument, a power supply, which is at least indirectly connected to the output connection point, and a power controller for controlling the electrical output power output via the output connection point. The power controller is designed to begin the output of an electrical output power when an output energy balance amount is greater than an output energy limit value and to end the output of the electrical output power when the output energy balance amount falls below a minimum value.
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公开(公告)号：US20230172652A1
公开(公告)日：2023-06-08
申请号：US18077001
申请日：2022-12-07
发明人： Daniel RAMIN , Thomas FÄHSING , Jelle DIJKSTRA
CPC分类号： A61B18/1206 , G01R31/52 , G01R19/10 , G01R15/04 , A61B18/16 , A61B2018/00892
摘要： An electrosurgical generator which outputs high-frequency AC voltage for an electrosurgical instrument includes a leakage current detecting device for the connected electrosurgical instrument. The leakage current detecting device is embodied as a voltage measuring device, the inputs of which are connected in each case via a capacitive coupling to an active and a neutral line of the output line and which has a bipolar voltage divider having a predetermined fixed ratio. An asymmetry detector connected via a capacitive coupling compares upper and lower voltage at the voltage divider, and outputs a fault signal for leakage current in the case of deviation of the ratio of upper to lower voltage from the predetermined fixed ratio.
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公开(公告)号：US20230067224A1
公开(公告)日：2023-03-02
申请号：US17892611
申请日：2022-08-22
发明人： Jelle DIJKSTRA , Thomas FÄHSING , Daniel RAMIN
IPC分类号： H02M7/5387 , H02M7/483 , A61B18/12
摘要： An electrosurgical generator for an electrosurgical instrument includes DC voltage supply and high-voltage inverter that generates high-frequency AC voltage having variable voltage and frequency. Inverter is multilevel inverter controlled by reference signal and having at least two groups of series-connected inverter cells, wherein each group is supplied with different DC voltage and wherein the voltages output by the two groups are summed to be output at output. Group supplied with higher voltage enables fast and large voltage changes with its inverter cells, while inverter cells of other group supplied with lower voltage allow fine setting with high change speed. Dynamic range is improved both from temporal viewpoint and in terms of increased voltage span. The number of HVC cells to be switched may furthermore be varied by way of modulator, wherein further number of LVC cells are switched in an opposing manner for compensation purposes. Switching losses may be reduced.
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公开(公告)号：US20220133391A1
公开(公告)日：2022-05-05
申请号：US17516122
申请日：2021-11-01
IPC分类号： A61B18/12
摘要： An electrosurgical generator includes a power supply unit which, when operating, supplies a direct voltage circuit, and a high-voltage inverter supplied from it that generates a high-frequency alternating voltage that is applied to outputs for connection of the electrosurgical instrument. The inverter includes a clock-driven power switch and a zero-crossing detector that recognizes zero crossings of the oscillation generated by the inverter. A signal for the generated alternating voltage is applied to the zero-crossing detector via a voltage divider which is a capacitive voltage divider with at least one capacitor that is resistant to high voltage. Undesirable direct voltage components at the center tap in the presence of changes to the supply voltage can be avoided thereby, since charge reversals as a result of changes to the supply voltage occur on both sides, and their effects thus cancel out.
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