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5285792 |
System for producing prioritized alarm messages in a medical instrument
A defibrillator/monitor (10) employing a message processing routine (60) that controls the way in which information from a plurality of sensing circuits (28) is communicated to an attending...
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5257623 |
Apparatus for generating electric pulses for biological object stimulation
The method comprises generating pulses of a specified repetition rate, duration modulating each pulse, composing packets of stimulating pulses with a specified packet duration and specified pause...
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5246000 |
Apparatus and method for testing the response of cardiac pacemakers to electromagnetic interference
A phantom test cell and method for testing the response of a cardiac pacemaker to electromagnetic fields. The phantom comprises a substantially rigid shell which has a torso-like section and two...
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5243981 |
Myocardial conduction velocity rate responsive pacemaker
A system for detecting changes in the myocardial conduction velocity and deriving control signals therefrom for controlling the delivery of electrical or other therapy to the heart or for...
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5237991 |
Implantable medical device with dummy load for pre-implant testing in sterile package and facilitating electrical lead connection
An implantable medical device is provided with a removable dummy load across its connector output terminals to allow the device to be tested without removal from the sterile disposable package in...
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5233986 |
Time domain reflectometer-integrity testing system and method for medical device electrode
A device and method for testing the integrity of an electrode/wire, such as a pacemaker electrode, and electrical wires connected thereto has a receptacle for an electrode and includes a time...
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5233985 |
Cardiac pacemaker with operational amplifier output circuit
A medical electrical stimulator employing an operational amplifier output circuit for producing an electrical stimulating pulse for application to body tissue and for sensing electrical activity in...
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5231990 |
Application specific integrated circuit for physiological monitoring
An application specific integrated circuit (ASIC) for physiological monitoring that has multiple inputs and outputs for flexible system architecture in which multiple ASICs are easily coupled...
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5222493 |
Verification of capture using an indifferent electrode mounted on the pacemaker connector top
A cardiac pacing system includes circuitry for verification of capture having an indifferent electrode mounted on the pacemaker connector top. The cardiac pacing system may use one or two bipolar...
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5209228 |
Electronic pacemaker testing device
An electronic test instrument for rapid comprehensive verification of correct operation of medical pacers. This portable microprocessor-based test instrument includes a device for measuring and...
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5168871 |
Method and apparatus for processing quasi-transient telemetry signals in noisy environments
A software-controlled, external programmer for transcutaneously programming and receiving data from an implanted medical device providing enhanced discrimination and detection of...
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5161529 |
Cardiac pacemaker with capture verification
A pacemaker having an electrical stimulation source of known type is provided with a sense amplifier having a switched capacitor circuit which allows switching of the amplifier's bandpass frequency...
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5158078 |
Rate responsive pacemaker and methods for optimizing its operation
A rate responsive cardiac pacemaker for providing an optimized pacing rate of stimulation pulses as a function of at least one selected rate control parameter. Each rate control parameter has a...
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5129392 |
Apparatus for automatically inducing fibrillation
An automatic fibrillator for inclusion in an implantable defibrillator. Fibrillation induction takes place while the patient's heart is beating at a known rate, and the fibrillation inducing pulse...
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5127401 |
Method of and apparatus for multi-vector pacing artifact detection
A technique for improving detection of the pacing artifact in patients having artificially paced myocardial contractions. The improved detection is accomplished by sensing all three commonly...
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5123419 |
Combined pacemaker parameter and vital sign monitor and method of display
A portable combined pacemaker parameter and vital sign monitor acquires data relating to a patient's ECG waveform and an in vivo pacemaker waveform by means of electrodes which contact the...
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5088488 |
Method and apparatus for implementing histogram storage and trend analysis in a medical stimulator
An implantable medical device employing a random access memory for storage of data relating the physiologic condition of the patient in which the device is implanted and/or information related to...
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5074308 |
System and method for recognizing pacemaker-mediated tachycardia
A pacemaker mediated tachycardia (PMT) is detected by circuitry within an implantable pacemaker. The PMT is detected by first detecting a tachycardia condition that includes a prescribed number of...
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5033473 |
Method for discriminating pace pulse tails
Disclosed is a method and apparatus for discriminating pace pulse tails generated by signals discriminated from QRS complexes by mathematically ascertaining that the signal following the pace pulse...
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5016634 |
Implantable medical device with means for telemetric transmission of data
A medical device adapted to be implanted in a patient includes components for detecting physiological events and/or for stimulating physiological events, and includes control logic connected to the...
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5012411 |
Apparatus for monitoring, storing and transmitting detected physiological information
A portable, self-contained, microprocessor controlled apparatus for monitoring, storing and transmitting detected physiological information, including an input section for sequentially receiving...
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4976681 |
Pacer interface device
A method and device for providing a timing signal to a medical device in response to light emitting indicators on a cardiac pacer. The device is optically coupled to the light emitting indicators,...
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4964407 |
Method and apparatus for assuring pacer programming is compatible with the lead
A series of test signals are generated by a microprocessor of a pacemaker to determine whether a bipolar or unipolar lead is attached to an implanted cardiac pacemaker restricting programming of...
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4949720 |
Apparatus for measuring the lead current in a pacemaker
Pacer lead current is assessed by monitoring the current through one of a plurality of output stage transistors.
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4949718 |
Intrauterine cauterizing apparatus
A method and apparatus for effecting necrosis of a tissue lining of a mammalian body cavity, particularly a uterine endometrium, by introducing an applicator comprising a distendable bladder...
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4941201 |
Electronic data storage and retrieval apparatus and method
An electronic data storage, transmission and retrieval apparatus and method wherein a combination power and data signal is received by a preferably portable and miniature data storage means which...
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4922907 |
Method for finding the parameters in a functional relationship between stimulation frequency and load condition sensor signals in a rate responsive heart pacemaker
A method of finding rate responsive parameter settings in a functional relationship between sensor signal and stimulation frequency for a pacemaker by selecting desired heart rates optimal for a...
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4892104 |
Apparatus for inspecting an electrically stimulated heart
Apparatus for inspecting the electrical stimulation of a patients' heart. The apparatus includes a stimulation device in which electrical stimulating wave is generated by an electrical stimulation...
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4892102 |
Cardiac pacing and/or sensing lead and method of use
A cardiac sensing and pacing lead primarily for transvenous insertion in the heart and connection to a pacemaker or other measuring or stimulating device. The lead includes a triple electrode...
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4870974 |
Apparatus and method for detecting heart characteristics by way of electrical stimulation
The apparatus and method of the present invention are used to detect the ECG and/or blood pressure (BP) waveforms and measure the R-R and Q-T intervals from the detected ECG signals, so as to...
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4830005 |
Disposable in-package load test element for pacemakers
A test device for use with a pacemaker to simulate the load of a heart. The device is designed for telemetering control and includes in its circuit a magnetic reed switch which opens and closes a...
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4825869 |
System for automatically performing a clinical assessment of an implanted pacer based on information that is telemetrically received
A cardiac pacer analysis system which is external to the patient is provided for an implanted pacer having patient history stored within the pacer. Information is transmitted from the pacer, and is...
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4791936 |
Apparatus for interpreting and displaying cardiac events of a heart connected to a cardiac pacing means
An apparatus for interpreting and displaying cardiac events of a heart connected to an implanted cardiac pacing means (2) is disclosed. The apparatus includes a telemetry head (4), at least one...
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4741340 |
Pulse to sinewave telemetry system
A telemetry system for communicating with a tank circuit contained in a pacer implanted in a patient includes a telemetry coil and a capacitor connected to the telemetry coil for forming a resonant...
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4712556 |
Pacemaker and method for ventricular rate limit operation and termination of pacemaker mediated tachycardia
A microprocessor-controlled pacemaker is programmed to extend an atrial refractory interval in response to the detection of events which could initiate a pacer sustained tachycardia. The extended...
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4712179 |
Method and apparatus for calibrating internal measurements of an implanted cardiac pacer
An implantable cardiac pacer having pacer circuitry for producing output stimulation pulses on leads connectable to a patient's heart includes internal measurement circuitry for producing...
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4705042 |
Pacing system analyzer having provision for direct connection of pacer to pacing leads
A pacing system analyzer for analyzing and verifying the performance of a pacer system which includes an implanted pacer lead and a pacer to be implanted. A patient cable includes a first plug...
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4681111 |
Analog and digital telemetry system for an implantable device
In an implantable device, transmission and reception of digital information is accomplished as well as the transmission and reception of analog information. The analog signal is FM modulated for...
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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...
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4664116 |
Pace pulse identification apparatus
A pace pulse identification apparatus in which low frequency signals are rejected by a filter and the pace pulses and high frequency noise are applied to one input of a comparator. A threshold wave...
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4658831 |
Telemetry system and method for transmission of ECG signals with heart pacer signals and loose lead detection
The invention is a telemetric biomedical system for simultaneously transmitting a pacer pulse together with lower frequency ECG wave forms and a loose lead signal. The loose lead signal is a low...
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RE32361 |
Implantable telemetry transmission system for analog and digital data
An improved telemetry transmission system for transmitting electrocardiographic information, indications of the occurrence of the pacing pulse and for transmitting digitially encoded information...
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4640285 |
Sense margin evaluation system and method for use same
The sense margin evaluation system and method for use of same is based upon (1) the interposition of a variable broad-band attenuator between an implanted cardiac pacer lead set and a pacer which...
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4628934 |
Method and means of electrode selection for pacemaker with multielectrode leads
An electronic electrode switching/selection circuit minimizes the number of feedthroughs from a pacer case to a pacer neck needed to connect with pacing lead electrodes that will be actively used...
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4625730 |
Patient ECG recording control for an automatic implantable defibrillator
An implantable automatic defibrillator includes sensors which are placed on or near the patient's heart to detect electrical signals indicative of the physiology of the heart. The signals are...
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4624260 |
Pacemaker with conditional atrial tracking capability
An implantable microprocessor-controlled dual chamber heart pacemaker is programmed to control the timing of the pacing of the ventricle in response to high rate atrial signals. The microprocessor...
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4611599 |
Electrical apparatus for influencing the metabolic characteristics of living systems
An electrical apparatus applies an electric field, e.g. a r.f. field, in a timed manner such that over a given cycle period, e.g. 24 hours, the field is applied for a selected portion of the cycle...
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4605007 |
Temporary package for an electrical component
A temporary package for an electrical component including a container for housing the electrical component. The container is adapted to maintain a specialized internal environment until opened....
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4603696 |
Lead connector
A connection system for joining a medical electrical stimulator to its electrical stimulus delivery system features a first member having a row of more than two contact surfaces each spaced apart a...
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4601291 |
Biomedical system with improved marker channel means and method
A biomedical system such as a pacemaker system having an implantable pacemaker and external apparatus, with communications capability for communicating between the implanted device and the external...
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