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7615011 |
Method and apparatus for measuring blood volume, and vital sign monitor using the same
A first member is adapted to measure an electrocardiogram of a patient. A second member is adapted to measure a peripheral pulse wave of the patient. A first calculator calculates a pulse wave...
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7608045 |
Method for noninvasive continuous determination of physiologic characteristics
The invention comprises methods for noninvasively monitoring physiological characteristics of a patient's blood. Determinations of blood constituent concentrations may be made by comparing...
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7604603 |
Method and system for extracting cardiac parameters from plethysmographic signals
A method and system for extracting cardiac parameters from a plethysmographic signal is described wherein the plethysmographic signal is passed through a first filter to remove non-cardiac...
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7604602 |
Disposable blood pressure transducer and monitor interface
A medical blood pressure transducer that provides an identifier to a monitor that conveys characteristics of the transducer. The monitor can use the information to decide whether to function, or in...
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7578794 |
Apparatus and method for detecting lung sounds using an implanted device
Adventitious lung sounds indicative of lung congestion are detected using an implantable sensor. The sensor is adapted to be positioned adjacent to a pulmonary system and to output signals...
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7569020 |
Method for extracting timing parameters using a cardio-mechanical sensor
In a method and apparatus for measuring the ejection fraction in a mammalian heart, the opening and closing of a heart valve is sensed with an implanted sensor, and a pre-ejection period is...
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7569019 |
Analysis and use of cardiographic bioimpedance measurements
A technique for analyzing cardiographic measurements includes receiving bioimpedance information of a subject and determining a rate of change of blood flow based on the bioimpedance information....
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7567838 |
Method for sensing cardiac contractile function using a lead insertable motion sensor
Systems and methods for detecting and measuring cardiac contractile function of a heart using an acceleration sensor unit inserted within the heart, such as within a vein of the cardiac wall are...
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7563231 |
Rapid thermal detection of cardiac output change
An improved method and apparatus for measuring changes in blood flow, particularly in the context of an automatic arrhythmia treatment device. The invention may employ a flow sensor which is...
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7549965 |
Compensation method for thermodilution catheter having an injectate induced thermal effect in a blood flow measurement
A catheter for retrograde orientation in a blood flow is used to determine the blood flow rate by thermodilution measurements. The determination of the blood flow rate accommodates injectate...
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7527598 |
Blood flow monitor with venous and arterial sensors
A technique is disclosed for determining blood flow in a living body by changing the thermal energy level in the venous blood flow path and determining temperatures in both the venous and arterial...
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7494470 |
Analysis of metabolic gases by an implantable cardiac device for the assessment of cardiac output
Analysis of metabolic gases by an implantable medical device allows the assessment of the status of a congestive heart failure patient by providing for the assessment of cardiac output. The present...
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7467012 |
Respiration parameters controlled by heart rate
Heart rate information is used at least in part to obtain one or more parameters for inducing respiration. In various implementations, respiratory parameters, such as a target breathing rate or a...
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7460909 |
Implantable device for monitoring hemodynamic profiles
An exemplary method includes providing a filling pressure parameter, providing a perfusion parameter, determining a hemodynamic profile based at least in part on the filling pressure parameter and...
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7402138 |
Method and apparatus for measuring blood volume, and vital sign monitor using the same
A first member is adapted to measure an electrocardiogram of a patient. A second member is adapted to measure a peripheral pulse wave of the patient. A first calculator calculates a pulse wave...
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7367954 |
Method and apparatus for determining cardiac output
A method and apparatus for use in determining the cardiac output. The method includes measuring a first parameter indicative of a patient's oxygen uptake and a second parameter indicative of the...
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7364550 |
Method and device for motion and noise immunity in hemodynamic measurement
A method and device, such as an implantable cardiac device, for motion and noise immunity in hemodynamic measurement is presented. The method includes obtaining a template waveform representing...
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7344497 |
Non-invasive device and method for measuring the cardiac output of a patient
The invention involves a device and method for ascertaining the functioning of the respiratory system and, in particular, determining the cardiac output of a patient. The device comprises an...
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7292887 |
Apparatus and method for spatially and temporally distributing cardiac electrical stimulation
A cardiac electro-stimulatory device and method for operating same in which stimulation pulses are distributed among a plurality of electrodes fixed at different sites of the myocardium in order to...
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7254946 |
Thermodilution catheter having a safe, flexible heating element
A thermodilution catheter having a heating filament which is fabricated so as to be thin and flexible enough to avoid contact with the patient's blood. The heating filament is either inserted in a...
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7209780 |
System and a computer program for the determination of quantities relating to the circulatory system of a patient
A system for the determination of quantifies relating to the circulatory system of a patient including a device for the non-invasive measurement of the qualitative variation over time of the local...
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7190996 |
Monitor for early detection of ischemic heart disease
A monitor for early detection of an ischemic heart disease of a patient has an impedance measurement unit including an electrode arrangement for measuring an intracardiac impedance and generating a...
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7186219 |
Calibration of a doppler velocimeter for stroke volume determination
Doppler Velocimetry is a widely used method for estimating stroke volume (SV). The accuracy and reliability of its measurement however, is dependant on
a) the correct assessment of the aortic...
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7169111 |
Multi-channel blind system identification for cardiovascular monitoring
Multi-channel blind system identification is utilized to identify a patient's cardiac functions without catheterization. The approach is adaptive to each patient's cardiovascular system variations....
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7135001 |
Rebreathing methods including oscillating, substantially equal rebreathing and nonrebreathing periods
A differential Fick technique including a first phase in which baseline breathing parameters may be established and a second phase in which a change in the effective ventilation of a patient is...
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7130684 |
Method and apparatus for improving ventricular status using the force interval relationship
Methods and devices for improving ventricular contractile status of a patient suitably exploit changes in ventricular pressure and/or dP/dt max to provide and/or optimize a response to a patient....
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7112176 |
Compensation method for thermodilution catheter having an injectate induced thermal effect in a blood flow measurement
A catheter for retrograde orientation in a blood flow is used to determine the blood flow rate by thermodilution measurements. The determination of the blood flow rate accommodates injectate...
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7087026 |
Devices and methods for measuring blood flow rate or cardiac output and for heating or cooling the body
Heat exchanger-equipped catheters and related methods that are useable for changing or maintaining at least a portion of the body of a human or veterinary patient at a desired temperature and for...
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7069072 |
Method and device for determining the segmental volume and electrical parallel conductance of a cardiac chamber or blood vessel
The segment volume of a cardiac chamber or blood vessel of a patient is determined by injecting a first indicator in the blood stream of a patient, which influences the conductance of the blood....
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6997877 |
Method for the measurement of post arteriolar pressure
A method for the measurement of post arteriolar pressure in a patient which is determined from information regarding the blood pressure (BP), systemic vascular resistance (R) and cardiac output...
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6969379 |
Intravascular cannulation apparatus and methods of use
This invention is a cannulation apparatus, and related methods for providing indirect access to a surgical site within a patient. The cannulation apparatus includes at least two fluid flow paths...
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6939307 |
Method and apparatus for monitoring haemodynamic function
The present invention relates to a method and apparatus for monitoring haemodynamic function in animals and humans during anaesthesia and surgery. During anaesthesia and surgery the subject's...
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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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6926675 |
Catheter heating circuit for continuous cardiac output measurement
The present invention concerns a catheter heating circuit for continuous cardiac output measurement. The circuit comprises a DC power source for supplying an operating voltage for the circuit,...
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6921367 |
Device and method for noninvasive continuous determination of physiologic characteristics
The invention comprises devices for noninvasively monitoring physiological characteristics of a patient's blood. Generally, probes having radiation emitters and detectors are used to determine...
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6913576 |
Method for measuring blood flow
A technique for determining blood flow in a living body by changing the thermal energy level by a predetermined amount at a site in a blood flow path and detecting temperatures at locations...
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6892095 |
Method and apparatus for monitoring left ventricular work or power
A body implantable system employs a lead system having at least one electrode and at least one thermal sensor at a distal end. The lead system is implanted within a patient's heart in a coronary...
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6858013 |
Method and apparatus for determining the cardiac output of a patient
In order to determine the cardiac output of a patient, the patient's respiration cycle is determined and an indicator is injected into the patient's bloodstream over a period of at least...
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6758822 |
Method and apparatus for measuring cardiac output
Cardiac stroke volume and output are estimated using an arterial pressure signal, which may be obtained either invasively, using a catheter-mounted pressure sensor, or non-invasively, with an...
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6743172 |
System and method for displaying medical process diagrams
A system and method is described for determining and graphically displaying oxygenation states of a patient in real time. The system is non-invasive and can display information to a physician that...
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6709400 |
System and method for the measurement of cardiac output
The invention concerns a system for the measurement of cardiac ( 1 ) output. The system comprises a heating resistor ( 2 ) placed in the vena cava ( 6 ), a temperature sensor ( 5 ) placed in the...
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6626842 |
Heart-sound analyzing apparatus
A heart-sound analyzing apparatus, including a heart-sound microphone which is adapted to be worn on a living subject to iteratively detect a second heart sound II of the subject, a...
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6616614 |
Apparatus and method for ascertaining cardiac output and other parameters
Apparatus for ascertaining cardiac output of the heart of a patient comprising a control and display module. A venous probe is inserted into a vein in the forearm of the patient and is coupled into...
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6592518 |
Cardiac monitoring system and method with multiple implanted transponders
A plurality of radio frequency semi-passive transponders are attached to an animal's organ, such as the heart. Each semi-passive transponder may be attached to the surface of the organ or mounted...
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6565516 |
Method and apparatus for measuring continuous blood flow at low power
A technique for determining blood flow in a living body by changing the thermal energy level by a predetermined amount at a site in a blood flow path and detecting temperatures at locations...
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6561986 |
Method and apparatus for hemodynamic assessment including fiducial point detection
An improved method and apparatus for non-invasively assessing one or more hemodynamic parameters associated with the circulatory system of a living organism. In one exemplary embodiment, the...
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6537230 |
Apparatus, computer system and computer program for determining a cardio-vascular parameter of a patient
A computer system ( 104 ) is connected to an injection means ( 107 ) to inject at a first place ( 101 ) a bolus warmer or colder than patient's blood. The travelling temperature deviation thus...
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6511438 |
Apparatus and method for determining an approximation of the stroke volume and the cardiac output of the heart
The invention relates to an apparatus and a method for determining an approximate value for the stroke volume and the cardiac output of a person's heart. The apparatus and method employ a measured...
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6506146 |
Apparatus for supporting heart performance
In a means for support of the performance of a heart ( 1 ) in which fluid is taken from blood vessels via an external pump ( 7 ) and is returned to the blood vessels, the amount of fluid being...
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6491640 |
Injection channel for a blood vessel catheter
The present invention is directed to an apparatus and method for injecting an injectate fluid into a blood vessel of a patient for carrying out thermodilution or dye-dilution measurements in order...
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