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7591787 |
Method for removing Doppler angle ambiguity
A method of measuring blood flow including several steps. In an initial step a first ultrasound beam is oriented in a direction substantially perpendicular to the direction of the blood flow to be...
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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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7532920 |
Guidewire with optical fiber
Apparatus and method to perform therapeutic treatment and diagnosis of a patient's vasculature through the use of an intravascular device having an optical fiber disposed therein. In an embodiment...
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7530953 |
Electrical connector
An electrical connector is described. In one implementation, the connector includes a female portion including one or more electrical contacts and a male portion including one or more electrical...
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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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7427265 |
Endoluminal implant with therapeutic and diagnostic capability
An apparatus includes an endoluminal implant, a RF coupling coil coupled to the endoluminal implant and a therapeutic transducer electrically coupled to the RF coupling coil and physically coupled...
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7400500 |
Low-power compact computer
A low-power compact computer comprises a processor having relatively low-power consumption, a supporting chipset having conventional power consumption, and a conventional random access memory...
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7347826 |
Packaging sensors for long term implant
According to this technique of packaging a sensor device implantable in a living body so as to provide protection of the sensor device and to the living body itself, an electrical conductor of the...
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7318838 |
Smart textile vascular graft
The smart textile vascular graft is used with an electrical control unit. The vascular graft includes a tube structure formed of a textile material. At least one active fiber is incorporated in the...
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7263398 |
Apparatus for measuring intravascular blood flow
Microwave apparatus for measuring the blood flow rate in a patient's blood vessel includes an intravascular catheter having proximal and distal ends and containing an inner coaxial cable forming a...
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7195598 |
Method for determining the effectiveness of a medical therapy by analysis of collateral vessels
In a method for determining the effectiveness of a therapy for alleviating a constriction in a blood vessel, the functioning of collateral vessels naturally formed at the constriction is analyzed....
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7192400 |
Device and method for vascular monitoring
A vascular coupler adapted to be fixed into position upon a blood vessel and there retain and position a matable sensing device. In a preferred embodiment, the vascular coupler is an anastomotic...
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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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7175588 |
Method and system for detecting ventricular collapse
A pump system includes an implantable pump including a motor having a rotor and a stator. The stator includes a plurality of stator windings, and a motor controller is coupled to the motor to...
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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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7121150 |
Method and apparatus to determine an initial flow rate in a conduit
A method and apparatus for determining an initial flow rate in a conduit is disclosed. A known change is made to the flow to be measured, resulting changes (or values corresponding to these...
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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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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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7060038 |
Device for delivering a sensor to the endovascular system and method of use
A delivery system for delivering a sensor to a body cavity includes a catheter and sheath slidably or rotatably coupled to the catheter. The sheath may be retractable and peelable. The delivery...
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7039454 |
Biological optical measuring instrument
A biological optical measuring instrument comprising a measuring probe ( 101 ) for collecting light from a plurality of portions of a subject ( 214 ) transmitted through the subject ( 214 ) by...
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7033322 |
Implantable sensor
A sensor is disclosed, for implantation within a blood vessel to monitor an analyte in blood. In one embodiment, the analyte is glucose. A signal indicative of glucose level is transmitted to an...
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7018336 |
Implantable sensor flush sleeve
A apparatus and method for cleaning a sensor tip of an implantable sensor includes a flush sleeve directed towards the sensor tip, a fluid conduit in fluid communication with the flush sleeve,...
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7011633 |
Blood flow measuring apparatus
A blood flow measuring apparatus has a measuring electrode and a counter-electrode adapted to be brought into contact with the blood of a patient. A measuring unit measures a voltage or a current...
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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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6938474 |
Sensing device and method for measuring features in a fluid
A method and a device for measuring features in a fluid such as pressure, flow rate, and temperature measurements is disclosed. The sensing device includes at least two sensing elements, all of...
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6918873 |
Inverted sensor module
An inverted sensor module for sensing physical and chemical fluid characteristics in a vessel in a living body. The inverted sensor module includes an inverted sensor bonded to a hollow carrier so...
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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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6842639 |
Method and apparatus for determining neovascular flow through tissue in a vessel
Methods and apparatus for guiding a guide wire through a blood vessel are described. An exemplary embodiment includes a guide wire coupled to an interferometric guidance system. The interferometric...
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6840956 |
Systems and methods for deploying a biosensor with a stent graft
A stent graft includes a tubular prosthetic graft, a support structure expandable between contracted and enlarged conditions, and a biosensor attached thereto. The biosensor may be directly...
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6746408 |
Method of blood flow measurement in arterio-venous hemodialysis shunts by indicator dilution
The present invention provides a method for measuring the blood flow rate within an A-V shunt via indicator dilution techniques. Unknown flow resistance within the A-V shunt are addressed by...
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6746407 |
Method of measuring transcutaneous access blood flow
Indicator dilution techniques are used to measure vascular access flow rates during routine hemodialysis. A bolus injection port is used to infuse a specific volume (V i ) of an indicator diluent,...
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6743180 |
Pressure sensor for use in an artery
A device for introduction into an animal or human body, especially into an artery. The device is preferably positioned in an aneurysmal sac in an artery between the wall of the artery and the wall...
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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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6695860 |
Transcutaneous sensor insertion device
An insertion device that includes an insertable portion adapted to be inserted into and retained in an animal body and an ex vivo portion that is adapted to be worn while the insertable portion...
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6648845 |
Method and apparatus for determining hemodialysis parameters
This invention provides a method and apparatus for calculating a hemodialysis parameter, especially blood access flow rate, using multiple dialysance values. The dialysance values may be calculated...
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6645143 |
Pressure/temperature/flow monitor device for vascular implantation
A medical monitoring apparatus designed to be implanted in the vascular system is capable of sensing and transmitting via a telemetry link to an external monitor both pressure and temperature...
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6623436 |
Retrograde catheter with reduced injectate induced temperature offset
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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6616624 |
Systems and method for controlling renovascular perfusion
Devices, systems and methods by which the real or apparent renovascular perfusion and intrarenal pressure may be selectively and controllably increased. By selectively and controllably increasing...
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6585660 |
Signal conditioning device for interfacing intravascular sensors having varying operational characteristics to a physiology monitor
A signal conditioning device is disclosed that interfaces a variety of sensor devices, such as guide wire-mounted pressure sensors, to physiology monitors. The signal conditioning device includes a...
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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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6551250 |
Transit time thermodilution guidewire system for measuring coronary flow velocity
The system for measuring the velocity of blood flow in the coronary artery, comprises a guidewire adapted for coupling with conventional coronary intervention devices and has two or more...
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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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6514214 |
Intravascular temperature sensor
Devices and methods for detecting vulnerable plaque within a blood vessel are disclosed. A catheter in accordance with the present invention includes an elongate shaft having a proximal end, a...
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6485431 |
Method and apparatus for determining cardiac output or total peripheral resistance
A method and apparatus determines continuously mean cardiac output by measuring the arterial pressure e.g. at a finger and calculating therefrom the mean arterial pressure and the time constant of...
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6471656 |
Method and system for pressure based measurements of CFR and additional clinical hemodynamic parameters
The present invention relates to intravascular pressure measurement based devices and methods determining clinical parameters related to stenosis severity for improved clinical diagnosis and...
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6454720 |
System for measuring physical parameters with a medical probe
The present invention relates to a system for measuring at least one physical parameter in a place in a patient's body to which a medical probe has access, comprising a medical probe ( 1 ) equipped...
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6413190 |
Rehabilitation apparatus and method
A system for rehabilitative therapy including a muscle contraction or body movement sensor coupled to a converter or interface, which is in turn coupled to a computer input port. The system...
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