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5184624 |
Electrical impedance tomography
A method of determining the external shape of a body comprises placing a plurality of electrodes adjacent the surface at spaced intervals around the body, causing currents to flow in the body by...
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5179946 |
Apparatus and method for arrhythmia detection by variations in the transcardiac impedance between defibrillation patches
An implantable device for the treatment of malfunctions of a patient's heart is disclosed. The device employs defibrillation patch electrodes positioned on the outer surface of the heart generally...
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5170794 |
Method and apparatus for deriving a respiration signal and/or artifact signal from a physiological signal
A method for deriving a respiration signal and/or a cardiac artifact signal from a physiological signal, in particular an impedance pneumography signal, includes detection of a heartbeat moment,...
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5143079 |
Apparatus for detection of tumors in tissue
Improvements in apparatus for detecting tumors in living human breast tissue comprising means for determining the dielectric constants of localized regions of living humans breast tissue including...
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5121750 |
Apparatus for locating a catheter adjacent to a pacemaker node of the heart
A method and apparatus for locating a catheter adjacent to a pacemaker node of the heart. The placement of a catheter tip just before SA heart pacemaker node is a common and desired procedure in...
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5111813 |
Defibrillation employing an impedance-corrected delivered energy
Impedance-normalized delivered energy is used as a control parameter in a defibrillation methodolgy and can be selected to yield the highest probability of successful defibrillation while...
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5109870 |
Apparatus for and method of motility and peristalsis monitoring
A catheter for measuring motility and peristalsis in tubular organs that transport their contents by simultaneous, multiple impedance measurements includes an insulating plastic tube, conductive...
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5103828 |
System for therapeutic management of hemodynamic state of patient
A therapeutic system provides a clinician with an appropriate course of treatment for a patient whose cardiovascular system is operating outside the normal range of values for the left cardiac work...
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5103835 |
Impedance monitoring device for preventing urinary incontinence
A monitoring device for preventing urinary incontinence has the following components: a high-frequency constant-current power supply adapted to supply a pair of terminals which are set on the...
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5097830 |
Defibrillator with reliability verification
A defibrillator is described with dual processors for verifying the performance of the defibrillator and halting the application of a defibrillation pulse to a patient if a failure of system...
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5092339 |
Method and apparatus for electrically compensated measurement of cardiac output
Cardiac output is measured using an injected substance (indicator) that changes the conducting property (electrical resistivity) of blood, provided the indicator has a different resistivity from...
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5088489 |
Current-based defibrillating method
An apparatus and method for the treatment of ventricular fibrillation, ventricular tachycardia, or supraventricular tachycardia. The method being to prospectively ascertain a patient's...
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5086781 |
Bioelectric apparatus for monitoring body fluid compartments
Apparatus for monitoring body water compartmentalization, specifically intracellular and extracellular body water. The apparatus includes a signal generator for generating a sequence of constant...
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5080586 |
Apical foramen position detector for use in dental treatment
There is disclosed a device for detecting the position of an apical foramen of a tooth's root by measuring a change in the impedance between a measuring needle inserted into a tooth's root canal...
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5078678 |
Method and apparatus for locating a catheter adjacent to a pacemaker node of the heart
A method and apparatus for locating a catheter adjacent to a pacemaker node of the heart. The placement of a catheter tip just before SA heart pacemaker node is a common and desired procedure in...
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5078134 |
Portable device for sensing cardiac function and automatically delivering electrical therapy
A patient-worn harness or vest protects at-risk patients from the possibly fatal results of heart arrhythmias. The harness or vest incorporates sensing electrodes for monitoring heart condition, a...
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5069223 |
Method of evaluating tissue changes resulting from therapeutic hyperthermia
A method of evaluating tissue changes in a mammal occurring as a result of applying a therapeutic hyperthermia treatment to a volume of tissue of the mammal, which entails: a) placing electrodes...
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5063937 |
Multiple frequency bio-impedance measurement system
The multiple frequency impedance measurement system of the present invention permits noninvasive examination of living tissue at any one of a plurality of frequencies. Precise frequency control is...
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5058583 |
Multiple monopolar system and method of measuring stroke volume of the heart
A multiple monopolar system and method for measuring stroke volume of a patient's heart. An intracardiac impedance catheter is provided with a plurality of monopolar electrodes axially spaced along...
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5058602 |
Paraspinal electromyography scanning
A method of electromyographic scanning paravertebral muscles comprising measuring electrical potential across a persons's spinous process bilaterally across segments of the spinous process.
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5036859 |
Moisture detector and indicator
An apparatus which detects urination by a user includes a urine sensing pad for placement over the pubic and/or perianal areas of a user. The sensing pad includes a pair of electrodes on a backing...
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5031629 |
Hypertension analyzer apparatus
The present invention is directed to an apparatus that is compact, portable and highly effective in performing a hemodynamic profile of a patient, and is particularly useful in generating such...
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5027813 |
Rate responsive pacemaker apparatus having an electrode interface sensor
A variable rate cardiac pacer apparatus is responsive to the physical activity of the patient. A source of alternating current carrier signals of a predetermined frequency is coupled to the pacer...
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5025784 |
Apparatus and method for detecting and processing impedance rheogram
An apparatus and method for detecting and processing an impedance rheogram includes a constant current source with output electrodes, an impedance signal detecting circuit having detecting...
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5021768 |
Detector for detecting resistance between fingers
A detector detects the variation of resistance between fingers of a human's hands which varies in response to his mental condition. When the mental condition is varied and the resistance between...
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5020541 |
Apparatus for sensing lead and transthoracic impedances
A method and apparatus for use with medical electrode systems that sense the integrity of lead connections and patient transthoracic impedance is provided. In an ECG electrode application, a...
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5016213 |
Method and apparatus for controlling an electrical device using electrodermal response
A method and apparatus utilizing electrodermal response as a control mechanism. A specific embodiment of the method and apparatus utilizing a personal computer having a game paddle input port is...
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5003987 |
Method and apparatus for enhanced drug permeation of skin
A method and apparatus for preparation of a selected area of skin to facilitate drug absorption comprises removal of the outermost layers of the skin by gentle abrasion or other means, measuring...
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4993423 |
Method and apparatus for differential lead impedance comparison
A differential lead impedance comparison apparatus (10) senses lead impedance and compensates for patient-to-patient and electrode variability. A bridge circuit (12) is connected to one end of...
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4966158 |
Measurement method for moisture content in the skin and system therefor
This invention relates to the measurement of the moisture content retained in the skin, and enables accurate diagnosis of the skin conditions by a device which can be switched in the connection of...
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4951683 |
Device for detecting keratoconjunctivitis sicca
A device for detecting keratoconjunctivitis sicca (KCS) utilizing a probe including a body having an end portion. A plurality of electrical contacts are mounted in spaced configuration at the end...
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4949727 |
Portable physical checker
A portable physical checker which is provided with a display part, a group of the function changing-over keys and ten-keys for data input on the surface of the unit case where is sufficiently...
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4947862 |
Body composition analyzer
An analyzer determines the amount of body fat on a patient by using a measurement of body impedence is based upon the nature of the conduction of an applied electrical current in the human body....
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4942880 |
Method for non-invasive electric diagnosis and therapy in hemodialysis and general medicine
A method of diagnosing and treating abnormal tissue includes the steps of generating an electric signal composed of electrical pulses in the range of 250 Hz to 5 KHz, applying the signal to a...
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4940056 |
Electrogustograph
The invention discloses an electrogustograph for detecting the physiological responses of the tongue to various tastants applied thereto through a small vacuum sensor. The small sensor has a...
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4926880 |
Method for relieving sinus and nasal congestion utilizing microcurrents
An apparatus and method for the relieving of sinus congestion by application of microcurrents to the facial areas of a human patient. The apparatus includes a carrying case adapted to be held by...
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4928090 |
Arousal level judging apparatus and method
An arousal level judging apparatus has a skin potential level (SPL) detection device, a potential change detection device for detecting occurrance and convergence of a pulse of the signal from the...
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4919145 |
Method and apparatus for sensing lead and transthoracic impedances
A method and apparatus for use with medical electrode systems that sense the integrity of lead connections and patient transthoracic impedance is provided. In an ECG electrode application, a...
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4920490 |
Process and apparatus for distinguishing conductivities by electric current computed tomography
A method and apparatus for an electric current computed tomography system having an array of electrodes determines the best pattern of currents to apply to the electrodes based on the precision of...
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4919136 |
Ventilation controlled rate responsive cardiac pacemaker
The rate of pacing pulses in a rate responsive pacemaker is controlled from data representing respiration characteristics in a patient detected by intracardiac impedance measurements for more...
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4917093 |
Biological tissue stimulator with adjustable high voltage power supply dependent upon load impedance
A biological tissue stimulator is disclosed having an adjustable high voltage power supply. The high voltage power supply is coupled to a battery producing a high voltage signal to be supplied to...
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4912060 |
Method and apparatus for electrical testing of membranes
A method and apparatus for electrical testing of membrane tissue employs a pair of rack sections which have cavities for receiving opposing end portions of the culture cup. The culture cup and rack...
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4911175 |
Method for measuring total body cell mass and total extracellular mass by bioelectrical resistance and reactance
A method for measuring total body cell mass, total body extracellular mass, total exchangeable potassium and total exchangeable sodium of a subject by using bioelectrical resistance and reactance....
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4909261 |
Tracking multielectrode electroglottograph
A tracking multielectrode electroglottograph has a number of electrodes that are located about each other in opposed arrays placed on either side of a subject's neck during vocalized speech or...
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4905705 |
Impedance cardiometer
A heart monitoring system for assessing a patient's cardiac condition. Bioimpedance components induce an electric current through the thorax of a patient's body and a first signal representing...
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4901725 |
Minute volume rate-responsive pacemaker
A rate-responsive pacemaker whose rate control parameter is minute volume derived over a bipolar lead. An algorithm based on averaged samples and zero crossings provides enhanced accuracy....
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4899759 |
Flow-through resistivity cell
A resistivity cell formed integrally with or attached to the proximal end of a diagnostic catheter, allowing blood resistivity to be more easily and accurately measured. The cell comprises...
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4899750 |
Lead impedance scanning system for pacemakers
A pacemaker lead analyzer for measuring impedance during standard operation of an implanted pacemaker. The analyzer makes separate measurements of lead impedance during each heart signal and each...
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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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