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7555328 |
Implantable substrate sensor with back-to-back electrodes
An implantable substrate sensor has electronic circuitry and electrodes formed on opposite sides of a substrate. A protective coating covers the substrate, effectively hermetically sealing the...
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7225024 |
Sensors having protective eluting coating and method therefor
A cardiac management implantable device that has an intravascular device body, and one or more chemical sensors coupled with the intravascular device body. A drug eluting substance is disposed at a...
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7164948 |
Cardiac output measurement using dual oxygen sensors in right and left ventricles
A pacemaker provides multi-chamber pacing with a pacing interval that can be programmed and adapted in response to cardiac output measurements for a given patient. In a typical embodiment, the...
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7136705 |
Method and apparatus for monitoring sensor performance during rate-responsive cardiac stimulation
A cardiac stimulation device and method monitor and store discrepancies in sensor indicated rates determined from two or more sensors generating signals related to metabolic demand. One feature...
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7136704 |
Blood oxygen monitoring system and a lead therefor
An oxygen monitoring system measures the oxygen concentration in a patient's blood for use as a physiological control parameter in rate responsive pacing. The oxygen monitoring system includes an...
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7074194 |
Apparatus and method for risk stratification of patients with chest pain of suspected cardiac origin
The subject invention relates to the detection, diagnosis and risk stratification of clinical events such as acute coronary syndrome, in patients with signs and symptoms of suspected cardiac...
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7029443 |
System and method for monitoring blood glucose levels using an implantable medical device
T-wave amplitude and QT interval are derived from patient cardiac signals. Then blood glucose levels are determined based on a combination of the T-wave amplitude and the QT interval. By using a...
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6937902 |
Pacemaker with determination of the dependency of cardiac output on the AV-delay
A cardiac pacemaker has a pulse generator for delivering stimulation pulses to a patient's heart and a control unit for controlling the delivery of the stimulation pulses from the pulse generator....
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6321101 |
Method and device for determination of concentration
In a method and a device for electrochemical determination of the concentration of at least one dissolved chemical entity in a liquid medium, a measurement voltage U is impressed on a working...
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6144866 |
Multiple sensor assembly for medical electric lead
An implantable sensor assembly for use with an implantable medical device are disclosed. The sensor assembly preferably includes two or more physiologic sensors coupled to the medical device via a...
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6134459 |
Light focusing apparatus for medical electrical lead oxygen sensor
An implantable sensor assembly for use with an implantable medical device are disclosed. The sensor assembly preferably includes two or more physiologic sensors coupled to the medical device via a...
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6125291 |
Light barrier for medical electrical lead oxygen sensor
An implantable sensor assembly for use with an implantable medical device are disclosed. The sensor assembly preferably includes two or more physiologic sensors coupled to the medical device via a...
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6125290 |
Tissue overgrowth detector for implantable medical device
An implantable sensor assembly for use with an implantable medical device are disclosed. The sensor assembly preferably includes two or more physiologic sensors coupled to the medical device via a...
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6122536 |
Implantable sensor and system for measurement and control of blood constituent levels
This invention is an implantable sensor and system capable of measuring, controlling, monitoring and reporting blood constituent levels. The implantable sensor for sensing in vivo the level of at...
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6064910 |
Respirator rate/respiration depth detector and device for monitoring respiratory activity employing same
A device for determining the respiration rate and/or respiration depth of a patient includes a sensor for sensing heart sounds and an analyzer for analyzing the variation of the amplitude of the...
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5730125 |
Implantable medical device with enclosed physiological parameter sensors or telemetry link
An implantable medical device, such as a cardiac pacer, defibrillator or drug delivery system, includes a container housing the required power source and circuitry and a header portion molded or...
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5487752 |
Automated programmable stimulating device to optimize pacing parameters and method
A method and apparatus for automatically optimizing a cardiac performance parameter of the heart, such as its cardiac output mean arterial pressure pO 2 or pCO 2 . The performance parameter is...
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5438987 |
Implantable lead for sensing a physiologic parameter of the body
The present invention includes a body implantable lead having a multipolar proximal connector, at least a first conductor coupled to at least one stimulating electrode, a sensor for sensing at...
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5423869 |
Multi-sensor rate-responsive pacemaker and method of operating same
A rate-response pacemaker includes a plurality of sensors that each sense a physiologic-related parameter suggestive of the physiological needs of a patient, and hence indicative of the pacing rate...
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5411532 |
Cardiac pacemaker having integrated pacing lead and oxygen sensor
An improved cardiac pacemaker system of the kind that includes an oxygen sensor implantable into a patient's blood stream along with one or two electrical conductors for use in sensing heart beat...
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5372607 |
Method and apparatus for monitoring pacemaker intervals
A method and apparatus for optimizing the performance of a rate-responsive cardiac pacemaker. A pacemaker is provided which is capable of obtaining and storing information about a patient's cardiac...
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5354318 |
Method and apparatus for monitoring brain hemodynamics
A sensor lead for use in conjunction with an implantable monitoring or therapeutic device. The lead is provided with a V-shaped bend near its distal end, and carries a blood parameter sensor distal...
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5342406 |
Oxygen sensor based capture detection for a pacer
A pacemaker system which includes an oxygen saturation sensor located near the distal end of a transvenous pacing lead generates a cycle-by-cycle variation of oxygen saturation indicative of the...
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5312454 |
Apparatus and method of automatically adjusting a sensor signal comparator threshold for an oxygen sensing pacemaker
A monitoring system for an oxygen sensing, dual-wavelength, reflectance oximetry based, rate responsive cardiac pacemaker, is capable of automatically and continually adjusting an oxygen sensor...
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5306293 |
Device for the prevention of cardiac failures
The implantable device, of the Holter intervention type, permits the detection and the polygraphic analysis (ECG, TA, haemodynamics, resonant frequencies), of the cardiovascular parameters,...
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5267564 |
Pacemaker lead for sensing a physiologic parameter of the body
The present invention includes a body implantable lead having a multi-polar proximal connector, at least a first conductor coupled to at least one stimulating electrode, a sensor for sensing at...
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5218961 |
Apparatus for in vivo intracardial of a measured signal corresponding to the physical activity of a subject and a heart pacemaker having a stimulation rate controlled thereby
An apparatus for the in vivo intracardial acquisition of a measured signal corresponding to the physical activity of a subject has an optoelectronic arrangement measuring the blood oxygen content...
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5176138 |
Implantable pacemaker having means for automatically adjusting stimulation energy as a function of sensed SO.sub.2
An implantable programmable pacemaker includes a sensor for measuring SO 2 levels in blood on a periodic basis, e.g., every 15 seconds, while the pacemaker is operating in its programmed mode of...
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5133349 |
Method for adapting the stimulation frequency of a heart pacemaker to the burden of the patient
During optimization intervals prescribed by the heart pacemaker, the stimulation frequency is periodically changed and an acquisition of a measured value that is dependent on the cardiac minute...
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5113862 |
Blood oxygen sensor having leakage compensation
An improved blood oxygen sensor apparatus having a special leakage compensation circuit that allows proper initialization of the oxygen sensor regardless or the value of leakage resistance which...
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5101824 |
Rate-responsive pacemaker with circuitry for processing multiple sensor inputs
An implantable rate-responsive pacemaker is disclosed wherein two or more sensors indicative of physiological demand are utilized in a fashion designed to realize the advantages of both sensors in...
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5088491 |
Heart pacemaker
A cardiac pacemaker for implanting in a patient includes a device for applying stimulating pulses to the heart of the patient at a rate determined by a pacing parameter; a device for detecting a...
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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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5085215 |
Metabolic demand driven rate-responsive pacemaker
A rate-responsive dual-chamber pacemaker and pacing method for supporting the heart with electrical stimulation at a pacing rate driven by the heart's sinus node or, alternatively, by a sensor...
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5076271 |
Rate-responsive pacing method and system employing minimum blood oxygen saturation as a control parameter and as a physical activity indicator
A rate-responsive pacing method and system senses the minimum blood oxygen saturation in the right atrium of a patient's heart and uses such minimum blood oxygen saturation as a control parameter...
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5063927 |
Rate-responsive pacemaker
A pacemaker has means for producing first and second signals one of which changes rapidly in response to changes in exercise level but may inaccurately represent the appropriate pacing rate. Such...
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5052388 |
Method and apparatus for implementing activity sensing in a pulse generator
A cardiac pacemaker system of the type including a sensor responsive to the metabolic demand for oxygen and which varies the pacing rate in response to the output of the sensor. The pacemaker...
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5044366 |
Rate responsive cardiac pacemaker
A rate responsive cardiac pacemaker for implantation in a patient utilizes a pair of sensors. One is an activity sensor responsive to movements of the patient for generating an electrical signal...
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5040533 |
Implantable cardiovascular treatment device container for sensing a physiological parameter
An implantable container for housing a cardiovascular treatment device is disclosed with a window positioned in an external wall thereof for sensing a physiological parameter for the treatment...
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5024222 |
Hemodynamically rate responsive pacemaker and method of automatically adjusting the escape and A-V intervals
In a rate responsive pacemaker, a physiological sensor is used to sense the physiological needs of the patient's heart and to control both the pacing rate and the A-V interval accordingly. A first...
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4945909 |
Pacemaker with activity-dependent rate limiting
A pacemaker is disclosed with a pacing rate that is restricted within a range defined by variable upper and lower rate limits that change as a function of the patient's detected level of activity....
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4932406 |
Dual chamber rate responsive pacemaker
A pacemaker which operates in an atrial synchronized modality when the sensed atrial rate is within a physiologic range and which paces at a sensor determined rate when the atrial rate is above or...
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4903701 |
Oxygen sensing pacemaker
A demand pacemaker which regulates its pacing rate based upon sensed oxygen saturation percentage. The pacemaker employs a two wavelength reflectance oximeter as a sensor. The sensor includes an...
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4886064 |
Body activity controlled heart pacer
Body activity sensors, such as termperature, motion, respiration and/or blood oxygen sensors, are positioned in a patient's body outside the pacer capsule. These sensors wirelessly transmit body...
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4870968 |
System and method for controlling the stimulation frequency of heart pacemakers
A follower control matches the stimulation frequency of a heart pacemaker to patient load condition by obtaining measurement values S 02 corresponding to the central venous blood oxygen saturation...
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4860751 |
Activity sensor for pacemaker control
A cardiac pacer is provided which incorporates a sensor responsive to the physical activity of the pacer-wearing patient. The output of the physical activity sensor is utilized by control circuitry...
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4848352 |
Method for cardiac pacing and sensing using combination of electrodes
A method for cardiac pacing and sensing is disclosed. A cardiac pacing lead is inserted into a heart chamber. The lead carries a plurality of separate electrodes positioned at the distal tip of the...
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4827933 |
Apparatus and method for adjusting heart/pacer rate relative to cardiac pO.sub.2 obtain a required cardiac output
The apparatus for pacing a heart in accordance with the heart rate needed to produce a required cardiac output while the person is exercising, comprises a pacer adapted to be implanted in a human...
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4813421 |
Oxygen sensing pacemaker
A heart pacemaker including a two wave length reflectance oximeter for determining oxygen saturation. The pacing rate is increased or decreased in response to the measured oxygen saturation. By...
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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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