Tsampazis
Kostas Tsampazis, Sidney AU
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20110077698 | METHOD AND CIRCUITRY FOR MEASUREMENT OF STIMULATION CURRENT - A method and device for measuring and controlling stimulation current, for example in an implantable device, are disclosed. A series capacitor (C | 03-31-2011 |
Kostas Tsampazis, North Ryde AU
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20120143284 | IMPLANT STIMULATION DEVICE - An implantable stimulation device is disclosed which provides for reduced power consumption when compared with bipolar stimulation and better stimulation performance when compared with monopolar stimulation. Implantable stimulator devices use less power in monopolar stimulation mode than that of bipolar stimulation but stimulation performance is greater when using bipolar stimulation. The device comprises circuitry capable of simultaneous stimulation between a reference electrode and an electrode of a stimulation array and between electrodes of the stimulation array, the ratio of current to the reference electrode and array electrodes being selectable. | 06-07-2012 |
Kostas Tsampazis, North Ryde, Nsw AU
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20130073002 | MEDICAL IMPLANT WITH CURRENT LEAKAGE CIRCUITRY - Medical device implants for stimulating the nervous system of a recipient are disclosed. Embodiments include a cochlear implant with electrodes for delivering charge to the cochlea of the recipient and stimulation circuitry for delivering the charge to the electrodes. The medical devices include a transfer line which carries power and/or communication signals, the transfer line being in contact with tissue of the recipient when the medical device implant is implanted. A leakage capture conductor and/or sensing electrode is located or locatable proximate the insulated conductor. | 03-21-2013 |
Kostas I. Tsampazis, North Ryde, Nsw AU
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20110087085 | METHOD AND DEVICE FOR INTRACOCHLEA IMPEDANCE MEASUREMENT - This method of determining an intracochlea tissue impedance comprises using at least two stimulating electrodes to apply an electrical stimulus to intracochlea tissue. A voltage caused by the stimulus is measured between two measuring electrodes distinct from the stimulating electrodes. From the voltage a stimulus-response characteristic of tissue between the two measuring electrodes is determined. This allows the tissue/electrode interface impedance and potential and the tissue impedance and potential to be uniquely determined. In turn, modiolus currents can be estimated in monopolar stimulation mode. Also provided is automated initiation of re-mapping of the device when tissue characteristics change | 04-14-2011 |
Kostas I. Tsampazis, North Ryde AU
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20110127243 | ELECTRODE CONTACT CONTAMINATE REMOVAL - Manufacturing an electrode assembly comprising forming an intermediate assembly comprising a carrier member having one or more electrode contacts embedded therein, the surface of the electrode contacts having a layer of carrier member material thereon; removing the layer of carrier member from the surface of the one or more electrode contacts, wherein a residual amount of the carrier member material remains on the surface of at least one of the electrode contacts; and substantially removing the residual carrier member material from the surface of the at least one electrode contact so as to increase the effective surface area of the at least one electrode contact. | 06-02-2011 |
Kostas Ioannis Tsampazis, North Ryde, Nsw AU
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20110043217 | ELECTRODE FAULT DETECTION - A method for detecting an electrode fault in a cochlear prosthesis. A voltage between the implanted electrode and a reference node is measured. It is then determined whether the voltage measured has been affected by an electrical leakage path between the electrode and a power supply node. | 02-24-2011 |