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| Number | Title | Issue Date |
| 7299083 | Electrode for, and method of, indicating signal characteristics at particular positions in a patient's body A chadd disposed on a patient's skin generates heat at a substantially constant temperature for an extended period of time (e.g., hours and days) when exposed to air. The chadd becomes porous when heated and produces a porosity in the patient's skin as a result of t... | 11/20/2007 |
| 7235050 | Implantable device for processing neurological signals An implantable device comprising a sensing unit, wherein the sensing unit is adapted to rectify biological/neurological signals in the form of sensed electrical signals from body tissue adjacent to the location of the implantable device. The sensing unit of the impl... | 06/26/2007 |
| 7171269 | Method of analysis of medical signals A method of analysis of medical signals which uses wavelet transform analysis to decompose cardiac signals. Apparatus for carrying out the method, and cardiac apparatus adapted to employ the method are also described. ... | 01/30/2007 |
| 7092762 | Low-power, high-modulation-index amplifier for use in battery-powered device An external transmitter circuit drives an implantable neural stimulator having an implanted coil from a primary coil driven by a power amplifier. For efficient power consumption, the transmitter output circuit (which includes the primary coil driven by the power amp... | 08/15/2006 |
| 7079901 | Low-power, high-modulation-index amplifier for use in battery-powered device An external transmitter circuit drives an implantable neural stimulator having an implanted coil from a primary coil driven by a power amplifier. For efficient power consumption, the transmitter output circuit (which includes the primary coil driven by the power amp... | 07/18/2006 |
| 6865409 | Surface electromyographic electrode assembly An electrode assembly for use on a surface of biological tissue to measure bio-electric signals including an electrode apparatus having an electrode device adapted to directly contact the surface of the biological tissue. The electrode apparatus receives and transmi... | 03/08/2005 |
| 6834205 | Automatic shock lead gain adjuster A system and method for automatically adjusting the gain for a shock lead system in an implantable medical device is provided. The system and method operate when, after a pre-selected period of time, the gain has not been programmed. The system and method then autom... | 12/21/2004 |
| 6807438 | Electric field sensor An electric field sensor employs a capacitive pick-up electrode in a voltage divider network connected to a body emanating an electric field. The system is relatively insensitive to variations in the separation gap between electrode and body, reducing sensor motion ... | 10/19/2004 |
| 6778855 | Automatic shock lead gain adjuster A system and method for automatically adjusting the gain for a shock lead system in an implantable medical device is provided. The system and method operate when, after a pre-selected period of time, the gain has not been programmed. The system and method then autom... | 08/17/2004 |
| 6728564 | Configurable sensor system for measuring biopotentials A configurable system for obtaining a measurement of activity producing biopotentials in a subject, for example EEG or EMG biopotentials. The system includes a three electrode array positionable on the head of the patient to detect signals generated in the head of t... | 04/27/2004 |
| 6718191 | Skin potential measuring sensor A skin potential measuring sensor includes a measuring electrode to be placed on the skin and a signal transfer element attached thereto. The elements which measure, handle and digitize the signal in order to convert it into a digital signal are placed close to the ... | 04/06/2004 |
| 6334068 | Intraoperative neuroelectrophysiological monitor An economically manufactured, highly sensitive, noise and interference resistant, AC powered, two, four or eight channel intraoperative neuroelectrophysiological monitor includes a mainframe having a touch panel display and a low noise interface cable pro... | 12/25/2001 |
| 6317625 | Method and apparatus for increasing the low frequency dynamic range of a system for measuring physiological signals with an implantable medical device A signal measuring system for use with an Implantable Medical Device (IMD) is provided for measuring physiologic signals having a relatively large effective dynamic range. In one embodiment, the system includes a High-Pass Filter (HPF), an Analog-to-Digit... | 11/13/2001 |
| 6302686 | Interocclusal dental appliance and method An interocclusal dental appliance has a liner and an outer shell of a material harder than the liner. The shell extends around the liner through the occlusal surface, the buccal and lingual surfaces, and around an undercut edge of the liner mechanically t... | 10/16/2001 |
| 6208888 | Voltage sensing system with input impedance balancing for electrocardiogram (ECG) sensing applications A voltage sensing system includes input impedance balancing for electrocardiogram (ECG) sensing or other applications, providing immunity to common-mode noise signals while capable of use with two electrodes. Signals are received at first and second elect... | 03/27/2001 |
| 6016446 | Cardiac rhythm management system including nonlinear, non-blanking sense amplifier A cardiac rhythm management system provides a nonlinear gain characteristic. The system operates without blanking switches that decouple its inputs from electrodes during delivery of a pacing or recharge pulse. The nonlinear gain characteristic includes p... | 01/18/2000 |
| 5954660 | Apparatus for filtering cardiac signals A device for filtering cardiac activity signals which receives input signals coming from collected physiological data, and delivers at an output, for processing data, signals spreading, in the frequency domain, over a widened spectral band. A first high-p... | 09/21/1999 |
| 5724967 | Noise reduction apparatus for low level analog signals Pairs of signal input leads with a low level signal imposed across them usually have noise induced by stray coupling capacitance which is typically unequal. This results in an unfavorable signal to noise ratio. Adding enough capacitance to the lead having... | 03/10/1998 |
| 5713365 | Pocket instrument for detecting an electric biological signal, in particular an electrocardiographic signal An instrument for detecting an electric biological signal, and wherein a pocket casing housing an electronic circuit presents a rectangular wall fitted with two flat electrodes and a display. The electronic circuit includes an amplifier stage wherein a fi... | 02/03/1998 |
| 5709213 | Low noise, high bandwidth, augmented lead circuit for acquisition of cardiac pacing artifacts Disclosed are a method of and apparatus for deriving augmented lead electrocardiograph (ECG) signals from electrical signals sensed at three skin surface, limb electrodes attached to a patient's limbs without the use of a high impedance resistor network. ... | 01/20/1998 |
| 5678559 | Eeg system Electrodes, preferably paired on a patient's head, produce signals representing the patient's brain waves at one of the paired electrodes and reference signals at the other paired electrode. Pre-amplifiers juxtaposed to the paired electrodes and having a ... | 10/21/1997 |
| 5427111 | Receiver for differential signals with means for adjusting a floating ground state A receiver or preamplifier for differential signals, in particular electrocardiogram signals, includes n electrodes to provide at least one signal at an acceptable common mode rejection ratio, even if the subject to which the electrodes are applied has a ... | 06/27/1995 |
| 5427110 | Circuit arrangement for the processing of physiological measurement signals Circuit arrangement for the processing of physiological measurement signals. In a known circuit arrangement, each one of a plurality of electrodes for picking up physiological measurement signals connects with a first input connection of an input amplifie... | 06/27/1995 |
| 5414392 | Amplifier circuit An electrical circuit comprising means for receiving an input signal for encoding or modulating and amplification. Multiple amplification stages including at least one transconductance amplifier are provided. There are means for having the input signal mo... | 05/09/1995 |
| 5392784 | Virtual right leg drive and augmented right leg drive circuits for common mode voltage reduction in ECG and EEG measurements An isolated amplifier, typically a biomedical amplifier, includes a main amplifier having inputs for receiving signals, a circuit for sensing a common mode voltage received by the inputs from the electrodes and providing a compensation voltage representat... | 02/28/1995 |
| 5368041 | Monitor and method for acquiring and processing electrical signals relating to bodily functions A monitor which receives electrical signals from a human body includes a portable data acquisition module and a substantially stationary processing module. The EEG signals are acquired and converted to an oversampled stream of digital signals by a sigma-d... | 11/29/1994 |
| 5360008 | Respiratory and cardiac monitor A respiratory monitor (apnea detector) utilizes the discovery that the magnetic permeability of a person's body varies with the respiratory and cardiac cycles. The respiratory and optionally cardiac monitor of the invention includes an oscillator circuit ... | 11/01/1994 |
| 5111814 | Laryngeal pacemaker A laryngeal pacemaker stimulates a paralyzed muscle in mirror image synchronism with a normally functioning muscle.... | 05/12/1992 |
| 5018523 | Apparatus for common mode stimulation with bipolar sensing An apparatus for stimulating and sensing evoked response to stimulus in the heart. First and second electrodes are in electrical contact with the heart, a third indifferent electrode is also in electrical contact with the heart. A pacemaker provides stimu... | 05/28/1991 |
| 5002064 | Portable life detection monitor including lead fail detector and unique signal processing system An electronic miniaturized, pocket-sized device for monitoring EKG and/or EEG signals and storing such signals. First, second and third electrodes are adapted for connection to a human body and first and second voltage amplifiers are electrically connecte... | 03/26/1991 |
| 4899760 | Noise rejecting detector for biomedical signals An improved biological signal detector which is extremely sensitive, yet resistant to the effects of high frequency noise. A multiplexed signal representation of a plurality biological signals is demultiplexed by a detector circuit comprising a plurality ... | 02/13/1990 |
| 4896120 | Instrumentation amplifier arrangement A substantially zero average DC output voltage is obtained in an instrumentation amplifier without degrading the gain by detecting the output of the amplifier and operating a non-galvanically coupled device responsive to the detected output to apply feedb... | 01/23/1990 |
| 4890630 | Bio-electric noise cancellation system A device and method are provided for bio-electric monitoring apparatus to cancel bio-electric noise on the body of a patient. The device comprises a plurality of monitoring electrodes for reception of bio-electric signals from the body, each monitoring el... | 01/02/1990 |
| 4865039 | Dry electrode system for detection of biopotentials and dry electrode for making electrical and mechanical connection to a living body A dry electrode system for the detection of biopotentials existing on the surface of the skin of a living body, including a dry electrode pad with a resilient conductive pad adhering to at least one adhesive pad or otherwise having opposed adhesive surfac... | 09/12/1989 |
| 4763659 | Dry electrode system for detection of biopotentials A dry electrode system for the detection of biopotentials existing on the surface of the skin of a living body, including a dry electrode pad with a resilient conductive pad adhering to at least one adhesive pad or otherwise opposed adhesive surfaces, one... | 08/16/1988 |
| 4751471 | Amplifying circuit particularly adapted for amplifying a biopotential input signal An amplifying circuit for amplifying a bipotential input signal, including an insulating housing having a conductive input contact mounted on the housing and adapted to engage a human body so that the bipotential input signal applied to the contact; a lea... | 06/14/1988 |
| 4742831 | Selection and isolation apparatus for use with ECG device Isolation circuitry for use with diagnostic ECG devices provides high common mode rejection and low leakage current using optoisolators in conjunction with an isolating operational amplifier. A predetermined pattern of binary input signals selectively ene... | 05/10/1988 |
| 4730618 | Cardiac pacer for pacing a human heart and pacing method A cardiac pacer which generates pacing pulses at a predetermined pacing rate includes a device for making a body activity measurement. The measured body activity signal is non-linearly amplified such that signal portions having higher amplitudes are more ... | 03/15/1988 |
| 4683441 | Apparatus for establishing the differences between multiple pairs of analog input signals A bank of differential amplifier circuits includes specialized circuits to provide multi-channel differencing with a minimum number of active devices such that the differences between pairs of analog input signals, such as available from patient monitorin... | 07/28/1987 |
| 4677986 | Unsaturable sense amplifier for pacer system analyzer An unsaturable cardiac sense amplifier includes first and second amplifying stages, each of which is subject to saturation by excessive input voltage. Input voltage to the first amplifier stage is limited to less than a saturating level by means of a pair... | 07/07/1987 |
