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Document Title |
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7604598 |
Apparatus, system and method for evaluation of esophageal function
A method, system and apparatus for ultrasonically imaging boli that are swallowed, as they are passed through the esophagus. The trajectories of the boli are tracked, and image data corresponding...
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7493219 |
Method of discriminating particle groups and particle analyzer
A method for discriminating particle groups comprises generating, by a particle analyzer, a particle characteristic distribution histogram in which the abscissa indicates respective channels for...
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7481774 |
Catheter with physiological sensor
The disclosed embodiments present improved catheters with physiological sensors. In one embodiment, the catheter includes, generally, a pressure transducer/electronics assembly connected to a...
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7223365 |
Device and method for detecting the coagulation functions of global, especially primary hemostasis
A method and a device are provided for examining the properties of the global, in particular the primary, hemostasis functions in whole blood or platelet-rich plasma. A volumetric blood flow is...
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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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7044913 |
Ultrasonic diagnosis apparatus
An ultrasonic diagnosis apparatus comprises an ultrasound probe, a transmitter (including a transmitting pulse generator and a transmitting beamformer), a receiver (including a preamplifier and a...
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7037267 |
Medical diagnostic methods, systems, and related equipment
A medical diagnostic method, system and related equipment particularly adapted to diagnose disorders of the blood circulation serving the head and neck, and especially the brain. A preferred use of...
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6912471 |
Processing method for a volume dataset
A volume dataset describes at least one tubular vessel and its environment. For processing the volume dataset, an operating point is first defined. A computer then determines slice planes...
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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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6738674 |
Implantable coronary sinus lead with mapping capabilities
A cardiac lead is disclosed that includes a first lead body having opposed proximal and distal end portions and an interior lumen extending therethrough. The first lead body includes a sensor for...
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6719697 |
Ultrasonic quantification of valvular regurgitant blood flow
Valvular regurgitation is assessed by identifying a characteristic regurgitation jet in a colorflow image. An M-line is placed over the region of regurgitation and Doppler M-mode information is...
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6626838 |
Blood flow meter apparatus and method of use
A strobed blood flow meter provides periodic measurements of blood flow velocity or volumetric blood flow over a cardiac cycle at reduced average power consumption, which is advantageous for...
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6537223 |
Probe head
A one piece, sealed ultrasound probe head for measuring volume flow in vessels, which comprises a conventional ultrasound reflector ( 20 ) and piezo-electric crystals ( 23 ), mounted on a support...
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6485427 |
Compressibility probe for monitoring blood volume changes
An apparatus and method to assess the compressibility of blood includes a combination of ultrasound transducers attached to tubing in which blood is flowing. An indicator medium is injected into...
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6306097 |
Ultrasound imaging catheter guiding assembly with catheter working port
An apparatus and method for operating a catheter guiding assembly, with one lumen providing access for an ultrasound imaging catheter and a second lumen providing a working port for a tool....
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6267727 |
Methods and apparatus for non-uniform rotation distortion detection in an intravascular ultrasound imaging system
Methods and apparatus for non-uniform rotation distortion detection for enhanced intravascular ultrasound imaging. The present invention provides methods and apparatus which detect non-uniform...
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6074349 |
Acoustic imaging and doppler catheters and guidewires
The invention features an acoustic medical device for making Doppler measurements and imaging within a body fluid conduit using a single-transducer. The device has an elongated device body,...
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6053873 |
Pressure-sensing stent
Implantable apparatus for measuring a fluid flow in the body of a subject, including a stent, having a generally cylindrical radial outer wall and a central lumen. A flow parameter sensor is fixed...
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5842994 |
Multifunction intraluminal ultrasound catheter having a removable core with maximized transducer aperture
A multi-function intraluminal ultrasound catheter assembly includes an axially disposed lumen having at least a first portion with a flat inner wall forming a "D-shaped" cross-section. An acoustic...
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5785657 |
Blood flow measurement device
A blood flow velocity measurement device is devised where there exist such entities within the fluid which are detectable when axially flowing (passing by) an appropriate detector of known and well...
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5522394 |
Implantable measuring probe for measuring the flow velocity of blood in humans and animals
An implantable measuring probe, preferably an ultrasonic probe, for measuring the flow velocity of blood in natural blood vessels or replacement blood vessels of humans and animals. The measuring...
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5453575 |
Apparatus and method for detecting blood flow in intravascular ultrasonic imaging
An apparatus and method are described for imaging blood flow from within a vasculature. An ultrasound catheter probe carrying an ultrasound transducer array is inserted within a blood vessel. The...
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5363853 |
Ultrasound probe for use with transport catheter and method of making same
A probe for use within a catheter is disclosed. The probe transducer portion is constructed of a crystal hollow cylinder with an inside lead attached to the inner surface of the crystal cylinder....
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5339816 |
Ultrasonic doppler blood flow monitoring system
A ultrasonic Doppler blood flow monitoring system is disclosed. The ultrasonic Doppler blood flow monitoring system comprises: a catheter to be inserted into a blood vessel; at least two ultrasonic...
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5333614 |
Measurement of absolute vascular flow
A vascular flow measurement catheter device for measuring total volumetric flow through a vessel includes a flow-measurement catheter having a full flow lumen of known cross sectional geometry...
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5325860 |
Ultrasonic and interventional catheter and method
A catheter having a catheter body with a proximal and distal end. The catheter including an ultrasonic transducer proximate its distal end. An access port being provided in the catheter for...
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5316001 |
Cardiac measurement system for measuring blood flow velocity by use of a sensor implanted inside the heart
A cardiac electrotherapy system has flow velocity measurement capability for measuring a velocity of blood flow at a region of a tricuspid valve of a heart. A pacing system is provided which...
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5305758 |
Ultrasonic apparatus for use in obtaining blood flow information
The present invention provides an apparatus that is useful in obtaining blood flow information. The device includes a carrier that, in preferred embodiments of the invention, includes either a...
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5291896 |
Cardiac output probe assembly
A cardiac output probe assembly is disclosed wherein the assembly includes a chest tube which carries a cardiac output probe therein. The chest tube includes a main lumen for draining fluids from...
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5254112 |
Device for use in laser angioplasty
Apparatus for use in removing atherosclerotic plaque deposits in a blood vessel comprises a high power laser, an elongated, flexible catheter adapted to be inserted into and advanced through the...
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5246007 |
Vascular catheter for measuring flow characteristics and method
Vascular catheter for measuring flow characteristics of a liquid in a vessel having a wall and an axis extending longitudinally of the vessel parallel to the vessel wall comprising a flexible...
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5220924 |
Doppler-guided retrograde catheterization using transducer equipped guide wire
A method and apparatus for Doppler-guided, imaged intravascular catherization of a higher mammal includes inserting into a peripheral blood vessel a steerable catheter which has a guide wire...
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5207226 |
Device and method for measurement of blood flow
A device and method for measuring fluid flow within a vessel having fluctuating elastic walls, such as, for example, an artery. The device includes a catheter; an internal stablizer or frame for...
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5190045 |
Method and device for doppler-guided and imaged retrograde catheterization
A method and apparatus for Doppler-guided, imaged intravascular catheterization of a higher mammal includes inserting into a peripheral blood vessel a steerable catheter which has a Doppler...
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5183048 |
Method and apparatus for removing artifacts from an ultrasonically generated image of a small cavity
An apparatus and method for imaging a small cavity is disclosed wherein reference waveforms to be used in obtaining an improved image are generated in vivo instead of in vitro as is the...
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5174295 |
Apparatus, system and method for measuring spatial average velocity and/or volumetric flow of blood in a vessel and screw joint for use therewith
System for measuring a characteristic of flow of liquid in a vessel of a patient comprising a transducer positioned in a vessel in a patient for supplying ultrasonic energy. The transducer produces...
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5152291 |
Acoustic fiber measurement of intravascular blood
One or more acoustic fiber guides are used to carry certain modes of acoustic energy to the tip of a catheter. Using these fibers, reflected sound (Doppler Sound) measurements are made in a blood...
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5144955 |
Doppler velocity measuring medical unit
A medical probe such as a catheter comprises a flexible, elongated member having distal and proximal ends, with Doppler-type velocity measuring means carried within said probe adjacent said distal...
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5119821 |
Diverging signal tandem doppler probe
A dual transducer probe for measuring blood flow by Doppler effect measurement in which quantitative flow data can be compiled and flow constriction points as small as 10% and less can be...
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5058595 |
Judkins-type angiographic catheter with Doppler crystal, and method of use
A Judkins-type angiographic catheter adapted to be inserted in a coronary artery for measuring the velocity of coronary blood flow, comprising a tube of flexible relatively soft material having a...
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5054492 |
Ultrasonic imaging catheter having rotational image correlation
An ultrasonic imaging catheter comprises a catheter body having a distal end and a proximal end. An ultrasonic imaging transducer is located within the distal end and is arranged to produce an...
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5022399 |
Venoscope
A method and apparatus for the non-surgical treatment of venous disorders and varicose veins wherein a flexible catheter is inserted into a varicose vein of a patient to be treated, guiding the...
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4967753 |
Apparatus, system and method for measuring spatial average velocity and/or volumetric flow of blood in a vessel
System for measuring a characteristic of flow of liquid in a vessel of a patient comprising a transducer positioned in a vessel in a patient for supplying ultrasonic energy. The transducer produces...
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4957111 |
Method of using a doppler catheter
A steerable catheter having a Doppler crystal at the tip to measure the velocity of blood in vivo--and inferentially the blood flow. The catheter includes two passageways, one passageway being...
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4889128 |
Doppler catheter
A steerable catheter having a Doppler crystal at the tip to measure the velocity of blood in vivo--and inferentially the blood flow. The catheter includes two passageways, one passageway being...
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4671295 |
Method for measuring cardiac output
Blood flow in the aorta and pulmonary artery of a mammal, most typically a human, is measured volumetrically by a non-invasive, ultrasound method and apparatus. The method comprises placing a...
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4582067 |
Method for endoscopic blood flow detection by the use of ultrasonic energy
Various forms of a catheter that is sized to pass through the biopsy channel of an endoscope include an elongated catheter tube of flexible material and an ultrasonic probe carried by the catheter...
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