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4894777 |
Operator mental condition detector
An information processing apparatus includes a processor for performing various information processing operations in accordance with an instruction from an operator, a bioinformation sensor for...
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4880014 |
Method for determining therapeutic drug dosage using bioelectrical resistance and reactance measurements
A method for determining a dosage regimen for a drug. Resistance (R) and reactance (Xc) are measured by bioelectrical impedance analysis with an impedance plethysmograph. Personal characteristics...
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4870967 |
Measuring arrangement for controlling an implantable body-assist device
An implantable arrangement for operating a body-assist device, the body-assist device including circuitry for generating electrical signals and also being implanted in a patient, includes circuitry...
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4870341 |
Impedance measurement circuit
A protection circuit for a defibrillator that prevents a defibrillator pulse from being generated if the impedance between the defibrillator's electrode leads is not characteristic of the impedance...
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4862887 |
Heart catheter
In a heart catheter which consists of a hose having a sonde with an electrode structure for locating pathological areas arranged at its distal end, a light transmitting fiber is movably disposed in...
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4860756 |
Electromagnetic bone healing sensor using a multi-coil sensor array
An apparatus and method for non-invasive sensing of bone healing is disclosed. The apparatus and method uses an electromagnetic field to measure impedance changes at and about the bone fracture...
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4852580 |
Catheter for measuring bioimpedance
This invention is directed to an improved impedance sensing system to measure blood flow and particularly cardiac output which comprise an elongated flexible catheter having two spaced apart...
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4850372 |
Electromagnetic non-invasive measurement and monitoring system for osteoporosis
A method for noninvasively sensing bone mass loss associated with osteoporosis is disclosed. The method uses an electromagnetic field to measure impedance (or conductivity) changes in the bone. A...
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4840182 |
Conductance catheter
Conductance catheter apparatus for measuring the volume of a biological chamber, the apparatus including a catheter employing a plurality of electrodes along its length, the plurality including...
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4840177 |
Current-based defibrillator
A method and apparatus is disclosed for providing to the body of a patient a defibrillation pulse having a magnitude calculated to induce in that particular patient a desired defibrillation...
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4836216 |
Method for predicting optimum time for insemination
In a method for predicting the optimum time for insemination of a human female, for maximum conception probability, the salivary and vaginal resistance of the subject is monitored. The optimum time...
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4836214 |
Esophageal electrode array for electrical bioimpedance measurement
An array of electrical bioimpedance electrodes are provided on a hollow, flexible tube that is insertable into the esophagus of a patient. Four electrodes are positioned on the outer wall of the...
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4823797 |
Apparatus and method for impedance measurement of body tissues
An apparatus for impedance measurement of body tissue has a signal source which impresses an electrical signal in body tissue, circuitry for acquiring an impedance signal from the body tissue...
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4819648 |
Non-invasive electromagnetic technique for monitoring time-trends of physiological changes at a particular location in the brain
An apparatus and method for non-invasively sensing physiological changes in the brain is disclosed. The apparatus and method uses an electromagnetic field to measure localized impedance changes in...
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4812126 |
Education or learning aid method
A new method of learning by use of a machine which interacts with the user to guide the user through a programmed series of questions. The system is based on finding trouble spots in the users...
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4810657 |
Method of diagnosing multiple sclerosis and other diseases by measurement of blood plasma protein streaming potential
Multiple sclerosis and other diseases are diagnosed by first coating a plasm protein-adsorbing surface with a patient's blood plasm protein in an electrolyte fluid, and measuring the streaming...
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4807638 |
Noninvasive continuous mean arterial blood prssure monitor
An apparatus and a method use noninvasive electrical bioimpedance measurments to monitor the mean arterial blood pressure of a patient on a continuous (heartbeat-by-heartbeat) basis. The apparatus...
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4805621 |
Apparatus for measuring impedance of body tissue
An apparatus for measuring the impedance of body tissue has a signal source connected to the tissue to be measured which supplies an electrical signal to the tissue, a unit for acquiring an...
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4794934 |
Apparatus for diagnosing the functions of the internal organs and autonomic nervous system of the living body
An apparatus for diagnosing the functions of the internal organs and the autonomic nervous system of the living body in which a constant voltage is applied across two or more electrodes attached to...
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4793362 |
Method and apparatus for monitoring the fluid balance of the body
The change in body fluid is monitored by placing a pair of electrodes at spaced locations on a body, i.e. a wrist and a diametrically opposed ankle and generating two high frequency alternating...
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4788983 |
Pulse rate controlled entertainment device
A control circuit for a portable radio or like entertainment device which allows it to play only so long as the user's heart rate lies within a range commensurate with safe, effective exercise...
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4785812 |
Protection system for preventing defibrillation with incorrect or improperly connected electrodes
A protection circuit for a defibrillator that prevents a defibrillator pulse from being generated if the impedance between the defibrillator's electrode leads is not characteristic of the impedance...
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4784155 |
Device for automated detection of estrus in farm animals
A telemetry system includes a transmitter, which is either placed in the vagina or is implanted in the vulvular or vaginal tissue, and a receiver. The transmitter is capable of measuring...
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4781685 |
Implantable drug-dispensing capsule and system facilitating its use
The invention concerns an implantable drug-dispensing capsule and a process and system facilitating its use. According to the invention, a mechanism (7) for detecting the proximity of the injection...
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4780661 |
High frequency impedance measuring apparatus using two bidirectional couplers
High frequency impedance measurements using a reflectometer measuring the impedance of a body disposed between two electrodes, by means of two bidirectional couplers connected by controlled...
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4770186 |
Method and apparatus for predicting and detecting the onset of ovulation
A method and apparatus for predicting ovulation in a human female subject. The onset of menstruation of the subject is noted. Daily determinations are made of the electrical resistivity of the...
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4753247 |
Method and apparatus for monitoring redox reactions
A method of monitoring changes of redox activity in a medium in vitro or in vivo which comprises placing into the medium a probe having a non-metallic surface exposed to said medium and whose...
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4736157 |
Wide-range resistance monitoring apparatus and method
An inexpensive circuit monitors the resistance between a body (e.g., a static dissipative work surface, a tool, etc.) and ground potential, and compares that resistance with high and low resistance...
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4733670 |
Device for cardiac output monitoring
An electrode assembly for cardiac output monitoring comprising a first pair of electrodes consisting of a first spot injection electrode for placement adjacent the xiphoid process for injecting a...
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4729385 |
Probe and method of use for detecting abnormal tissues
Two probes for tissue impedance measurement each have first and second conductive rings unitarily arranged with an insulative member separating the rings. The conductive rings are coaxially...
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4727330 |
Method and apparatus for measuring the electrical conductivity of a subject
Apparatus for measuring the electrical conductivity of a subject comprises a coil for producing a substantially uniform magnetic field within a predetermined volume and a transport assembly for...
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4702259 |
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 an analog portion, a digital portion and a source of power for supplying stable power to the analog and...
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4697599 |
Apparatus for locating and detecting pain
A selective tissue conductance meter is described which can be used to assess pain, abnormal sensation or sympathetic dysfunction in a human being or animal. Two concentric electrodes are mounted...
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4690152 |
Apparatus for epithelial tissue impedance measurements
Two probes for tissue impedance measurement each have first and second conductive rings unitarily arranged with an insulative member separating the rings. The conductive rings are coaxially...
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4690149 |
Non-invasive electromagnetic technique for monitoring physiological changes in the brain
An apparatus and method for non-invasively sensing physiological changes in the brain is disclosed. The apparatus and method uses an electromagnetic field to measure localized impedance changes in...
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4688580 |
Non-invasive electromagnetic technique for monitoring bone healing and bone fracture localization
An apparatus and method for non-invasive sensing of bone healing is disclosed. The apparatus and method uses an electromagnetic field to measure impedance changes at the bone fracture site during...
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4683891 |
Biomonitoring stress management method and device
A method of managing and controlling stress in a person engaged in a goal oriented, cognitive task involves simultaneous measurement of a physical parameter of the person which varies in accordance...
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4674518 |
Method and apparatus for measuring ventricular volume
A method and apparatus for the instantaneous measurement of venticular volume using an intracavity electrical impedance catheter having plural pairs of spaced surface electrodes driven by a...
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4660562 |
Multi-event biomedical electrode assembly
An electrode assembly for multi-event biomedical event measuring which has a device for sensing more than one physiological parameter of a patient and includes a housing having an upwardly...
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4649932 |
Method and apparatus for deriving currents and potentials representative of the impedances of zones of a body
In deriving the impedance of a zone of a body errors arise when currents used stray from the zone due to movements of, and/or changes within the body. In the invention a current used for deriving...
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4651280 |
Electrosurgical control system using tissue conductivity
A Microprocessor controlled Relay is between and in series with the Electro-Surgical Unit and the NiCr loop, to control the output power of the E.S.U. during the operation of Transurethral...
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4630615 |
Apparatus for measuring impedance
The apparatus comprises: a comparator for comparing the voltage at which the constant current pulses are being supplied to the load with an increasing reference voltage; a counter for counting the...
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4625732 |
Apparatus for measuring the actual psychophysiological condition
Apparatus is provided for measuring the actual psychophysiological condition of a subject. The apparatus may be hand held and includes finger engaging sensor means, a keyboard and a display means....
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4619265 |
Interactive portable defibrillator including ECG detection circuit
A portable, interactive medical electronic device exemplified by a defibrillator. The device obtains information about a patient's condition, such as ECG and transthoracic impedance data, directly...
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4617939 |
Tomography
Tomographic images (I 1 and I 2 ) of a body are constructed by placing a plurality of surface electrodes (1 to 16) at spaced intervals on the body (M), causing currents to flow in the body, and...
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4602639 |
Method and apparatus for contactless measurement of charge concentrations and potential differences in biological organisms
Apparatus and a method are presented for contactless measurement of charge concentrations and potential differences in biological organisms, with the electrode being spaced from the organism....
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4577640 |
Method and apparatus for direct in vivo monitoring of uterine electrical activity
This invention relates to an improved apparatus for directly detecting and monitoring uterine bio-electrical activity "in vivo" characterized by an electrode carrier in the form of a cup shaped to...
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4578635 |
Device for measuring and indicating changes in the resistance of a living body
An apparatus for measuring and indicating changes in the resistance of a living body in which all changes in the resistance of the living body are displayed automatically by the apparatus. The...
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4574810 |
Automatic threshold defibrillator
A defibrillator which will automatically ascertain the transthoracic resistance of the patient and then automatically apply a defibrillation shock according to the transthoracic resistance and an...
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4562843 |
System for determining characteristics of blood flow
Method and apparatus are disclosed for determination and display of hemodynamic characteristic values of a patient in a variety of statistical forms and in relative or absolute terms, the...
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