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4539640 |
Reconstruction system and methods for impedance imaging
A method and apparatus for imaging the interior of a structure, such as a mineral or human body, having regions therein which differentially affect particular characteristics of electrical signals...
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4537203 |
Abnormal cell detecting device
This invention discloses an abnormal cell detecting device having at least a pair of electrodes to be attached to a portion of a body. At least one electrode of the pair of electrodes is...
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4498481 |
Estrus cycle monitoring system
Estrus cycle monitoring (ECM) system for detecting estrus in female mammals and human females by measuring electrical resistance of mucus in the vaginal cavity. A hand-held electrical package...
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4494554 |
Skin test device using I.C. comparator circuit
A skin condition tester is disclosed employing an inexpensive, battery powered, I.C. comparator circuit that tests for dry, normal and oily skin. An instantaneous digital readout is obtained that...
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4486835 |
Apparatus and techniques for electric tomography
Apparatus for electric tomography comprising a coupling medium for receiving an object to be examined, a plurality of electrodes disposed in the coupling medium and arranged in a three dimensional...
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4461301 |
Self adjusting bio-feedback method and apparatus
A bio-feedback method for training persons in the self-regulation of physiological functions by means of displaying to the person a continuous representation of a value of such physiological...
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4459995 |
Indicating device for use in a device for measuring and indicating changes in resistance of a living body
In accordance with the invention there is provided an electrical resistance measuring indicating device including a bridge network having on one side thereof a first resistance arm connected to a...
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4458694 |
Apparatus and method for detection of tumors in tissue
Apparatus for detecting tumors in living human breast tissue comprising apparatus for determining the dielectric constants of localized regions of living human breast tissue including probe...
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4450527 |
Noninvasive continuous cardiac output monitor
The invention provides apparatus and methods for using the electrical bioimpedance measurements to monitor parameters associated with blood flow in a segment of body tissue. The invention...
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4441507 |
High speed single electrode membrane voltage clamp
A high speed single electrode voltage clamp circuit for enabling study of the action potentials in small and otherwise inaccessible nerve cells. The circuit includes a high input impedance, low...
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4417581 |
Corneal electrode for electroretinography
Corneal electrode comprising an electrically conductive metal wire conductively attached to a yarn of silver-coated nylon fibers. This electrode is employed to measure the change in an electric...
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4407300 |
Potentiometric diagnosis of cancer in vivo
Methods for scanning and diagnosing the presence or absence of malignant cancerous tissue in areas such as mammary tissue and lymph nodes of human and animal bodies by measuring the electromotive...
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4387723 |
Method and apparatus for determining the level of neuromuscular block in a patient
Electrical stimulus pulses are provided to the ulnar nerve of a patient and the adduction of the patient's thumb in response to the pulses is measured by a strain gage force transducer attached to...
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4380237 |
Apparatus for making cardiac output conductivity measurements
An improved catheter probe includes a conductivity sensor comprising four electrodes configured and spaced to be electrically coupled together by vascular fluids. A current source is provided for...
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4365637 |
Perspiration indicating alarm for diabetics
A self-contained wearable device for use by diabetics to provide an audible indication of the onset of insulin shock. The device utilizes a sensor positioned to sense the buildup of perspiration on...
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4331160 |
Method for detecting and recording physiological changes accompanying emotional stresses
This invention relates to a device and method for detecting and recording a single electrical effect responsive to physiological changes accompanying emotional stresses, and in particular it...
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4306568 |
Method and apparatus for congelation cryometry in cryosurgery
A method and apparatus for measuring the temperature of malignant tissue to be frozen during cryosurgery, involving the insertion of an active needle electrode (18) laterally of and below the...
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4302627 |
Dental stethoscope
A measurement channel oscillator and a reference channel oscillator are provided in combination, a measurement probe and a mouth mucose lead element are respectively connected to the measurement...
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4300574 |
Device for measuring and indicating changes in resistance of a living body
A device for measuring and indicating changes in the resistance of a living body including a single battery source, a means for setting a reference voltage level provided across the battery, a...
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4291708 |
Apparatus and method for detection of tumors in tissue
An apparatus for detecting tumors in living human breast tissue includes instrumentalities for determining the dielectric constants of a plurality of localized regions of living human breast...
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4274419 |
Skin preparation device and method used in the application of medical electrodes
A method and device for preparing the skin of a patient to ensure good electrical contact between a medical electrode and the patient's skin. The electrode or the tips of the preparation device...
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4273531 |
Root canal measuring apparatus
A root canal measuring apparatus can measure a length of a root canal without using an oral electrode. The apparatus is composed of an oscillating circuit having a relatively high output impedance,...
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4269195 |
Apparatus for measuring a pulmonary function
A plurality of impedance pneumographs for measuring impedances at the locations of a human thorax are provided together with a pneumotachograph for measuring an amount of respiration. An impedance...
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4263920 |
Method of and device for determining internal body structure
Determining the internal structure of a body, for example, a human body, by means of an electric field which extends between individual electrodes of an electrode array which at least partly...
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4252130 |
Method and apparatus for monitoring the congelation of a biological body
The method and apparatus determines the moment when, in the course of an operation of freezing a biological body of predetermined contour, the freezing becomes complete. At the periphery of the...
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4240443 |
Selective preamplifier of cell potentials
There is disclosed an apparatus for the selective detection and controlled gain of intranuclear and intracellular potentials. Such apparatus contains an amplifier with a gain control, such...
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4224949 |
Method and electrical resistance probe for detection of estrus in bovine
This invention is drawn to a bovine vaginal probe capable of measuring electrical resistance in a bovine vaginal tract with sufficient accuracy to allow detection of changes in electrical...
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4215698 |
Dental-caries detector
A dental-caries detector for the determination of dental caries by measurement of the electrical conductivity or other electrical property of a tooth, which dental-caries detector comprises: an...
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4193408 |
Endodontic therapy instrument
An endodontic device for measuring and indicating the depth of penetration of a probe in a root canal of a tooth during a root canal operation includes a meter having a pair of juxtaposed,...
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4184486 |
Diagnostic method and sensor device for detecting lesions in body tissues
Diagnostic method and sensor device for detecting the location and/or character of lesions in body tissues. Electrodes of different substances are put onto or into a tissue being tested, the...
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4182314 |
Multi-channel vascular flow monitoring system
A multi-channel vascular flow monitoring system for measuring skin resistance during peripheral blood flow. Conventional EKG type electrodes supply current flow through a selected segment of skin...
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4178916 |
Diabetic insulin alarm system
The disclosed Diabetic Insulin Alarm System is designed to monitor certain physiological conditions of the wearer associated with insulin shock. The system includes means to sense such...
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4173217 |
Massage apparatus
Massage apparatus for treatment of deep muscle in body tissue has a galvanic skin reactor having electrodes adapted to be attached to the skin combined with a massage device having massage elements...
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RE30101 |
Impedance plethysmograph
Cardiac output is measured by connecting excitation electrodes at the upper and lower ends of the thorax of a mammalian subject, connecting measuring electrodes to the thorax between the excitation...
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4155351 |
Medical instrument for detecting body impedance
A medical cell holder for use in a device which detects the impedance of a human body to actuate an electronic circuit. The holder comprises an inner assembly containing an electronic circuit; and...
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4140109 |
Impedance-based method and apparatus for monitoring cryodestruction in controlled cryosurgery
An impedance-based method for the controlled cryosurgery of a patient's malignant tumor consisting of the steps: placing a contact electrode electrically connected to an impedance meter in electric...
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4116231 |
Living body function measuring apparatus
A heart/lung function measuring apparatus comprises a source for permitting a constant slight current of a high frequency wave of predetermined frequency to flow through a to-be-measured portion of...
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4112923 |
Antonomic transcutaneous affect device
A device for effectuating an automatic transcutaneous affect by applying energy to a living organism includes a self-contained power supply disposed in a housing. A probe circuit is utilized to...
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4109645 |
Development of instruments measuring body resistance to ion and ionophoresis applications
An instrument for measuring body resistance to ion and ionophoresis applications comprising a reading circuit for providing a reading of body resistance values after an established period during...
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4096852 |
Skin conditioning indicator
A circuit for an indicator having a constant current temperature measuring circuit that can be balanced so as to provide a norm on an indicator so that any excursion thereof therefrom would provide...
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4088125 |
Method and apparatus for monitoring skin potential response
Biofeedback training of a subject may be achieved by monitoring the skin potential response of the subject and by shaping the monitored response so that a feedback signal is generated only if the...
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4055799 |
Method of and device for measuring elastic and di-electric properties of the diaphragm of living cells
A method of and device for ascertaining elastic and di-electric properties f the diaphragm of individual living cells of living beings or of the diaphragms of such living cells in a physiological...
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4038975 |
Method of and apparatus for the detector of neoplasms and other morphologic changes in mucous membrane samples
A living specimen of a mucous membrane tissue is connected in series with a high-frequency voltage generator and a pair of like-valued resistors. The bulk of the membrane sample is connected via a...
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4014323 |
Electrotherapy system
A system utilizing a low power level of pulsed alternating current for assisting a patient in producing an improved physiological or psychological condition within his body, wherein one improvement...
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4008712 |
Method for monitoring body characteristics
A method and apparatus for performing electrical measurement of body mutual electrical impedances to determine changes in total body water in normal and deranged states of the body. The apparatus...
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4008714 |
Brain wave correlation system and method of delivering a recorded program of material educational in content
Methods and apparatus are provided for deriving an audible indication of a person's brain wave frequency, and for actuating a tape player or the like to deliver a recorded program of material...
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3980073 |
Method and apparatus for aiding diagnostic scanning of the body of a patient
A circuit having an amplifier coupled to an oscillator, the oscillator having a second amplifier and a feedback circuit. Changes in resistance between an electrode coupled to the circuit and a...
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3980077 |
Method for aiding diagnostic scanning of the body of a patient
A circuit having an amplifier coupled to an oscillator, the oscillator having a second amplifier and a feedback circuit. Changes in resistance between an electrode coupled to the circuit and a...
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3971366 |
Apparatus and method for measuring the condition of the meridians and the corresponding internal organs of the living body
An apparatus which diagnoses the functional condition of every internal organ and the balance condition of the autonomic nervous system in a living body has a reference electrode firmly attached to...
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3971365 |
Bioelectrical impedance measuring system
A bioelectrical impedance measuring system that measures and indicates the impedance of a biological subject, such as one or more human extremities. The system measures and indicates a basal...
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