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| Number | Title | Issue Date |
| 7850614 | Doppler guiding catheter using sensed blood turbulence levels A guiding catheter includes a Doppler sensor disposed at a distal end of a flexible shaft. The Doppler sensor can sense a blood flow turbulence level within a chamber of the heart or a blood vessel of the heart. Detecting changes in a blood flow turbulence level is ... | 12/14/2010 |
| 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 preferably adjusted, depending on the measured pressure of the volumetri... | 05/29/2007 |
| 7220229 | Density/solute monitor of multi-modalities and signal processing scheme A density/solute monitor having at least one ultrasound probe, a signal processing unit, and a computing mechanism, and process for using the same, to measure phase shift between emitting and receiving ultrasound, sound velocity, compressibility, density, and solute... | 05/22/2007 |
| 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 valve cross-sectional area (CSA), and b) the max... | 03/06/2007 |
| 7156812 | Volumetric image ultrasound transducer underfluid catheter system An underfluid ultrasound imaging catheter system includes a catheter having a distal end inserted into an underfluid structure, an ultrasonic transducer array mounted proximate the distal end of the catheter wherein the array has a row of individual transducer cryst... | 01/02/2007 |
| 7077836 | Methods and apparatus for sclerosing the wall of a varicose vein A preferred apparatus for delivering an intravascular drug such as a sclerosing agent (or a microfoam sclerosing agent) to a varicose vein includes a catheter having three concentric tubes. The innermost tube has a guide wire lumen and an inflation lumen. The distal... | 07/18/2006 |
| 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 receiving beamformer), a CFM processor (including a moving-element sig... | 05/16/2006 |
| 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 the system is early, rapid, accurate, diagnosis of stroke, especiall... | 05/02/2006 |
| 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 containing the operating point and a sectional area enclosed by the vessel and... | 06/28/2005 |
| 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 of an endoprosthesis. The device has at least a pressure sensor and t... | 06/01/2004 |
| 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 measuring blood flow parameters to facilitate placement of the distal ... | 05/18/2004 |
| 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 acquired from the flow convergence region adjacent the regurgitant orifi... | 04/13/2004 |
| 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 reducing battery size, and extending device battery life, such a... | 09/30/2003 |
| 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 element (30) which is permanently inserted into a housing (10) ... | 03/25/2003 |
| 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 the bloodstream of the subject over one or more time points ... | 11/26/2002 |
| 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. Optionally, the ultrasound imaging catheter in the catheter guidi... | 10/23/2001 |
| 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 rotation in an improved manner without using beacons which may... | 07/31/2001 |
| 6120455 | 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 rotation in an improved manner without using beacons which may... | 09/19/2000 |
| 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, defining a device axis, constructed for positioning a distal end ... | 06/13/2000 |
| 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 to the stent, and measures a parameter relating to a rate ... | 04/25/2000 |
| 5921934 | 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 rotation in an improved manner without using beacons which may... | 07/13/1999 |
| 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 imaging window having a circular cross-section is connecte... | 12/01/1998 |
| 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 defined dimensions mounted onto a catheter. The entities ... | 07/28/1998 |
| 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 probe is provided with a rod-shaped probe head arranged at ... | 06/04/1996 |
| 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 transducer array emits ultrasound excitation signals and re... | 09/26/1995 |
| 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. One end of the outside lead is positioned close to the oute... | 11/15/1994 |
| 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 transducers provided on the catheter and arranged for tra... | 08/23/1994 |
| 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 provided with a relatively short distal measurement segment wi... | 08/02/1994 |
| 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 delivery of a therapeutic device or the like to proximate the dis... | 07/05/1994 |
| 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 outputs a pacing electrical signal to the heart. A control unit ... | 05/31/1994 |
| 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 catheter or guide wire. The device further includes at least o... | 04/26/1994 |
| 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 the thoracic cavity of the chest and a secondary lumen whic... | 03/08/1994 |
| 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 blood vessel, a plurality of circumferentially arrayed optic... | 10/19/1993 |
| 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 elongate tubular member adapted to be introduced into the vesse... | 09/21/1993 |
| 5222501 | Methods for the diagnosis and ablation treatment of ventricular tachycardia A closed-heart method for treating ventricular tachycardia in a myocardial infarct patient afflicted with ventricular tachycardia is disclosed. The method comprises, first, defining a thin layer of spared myocardial tissue positioned between the myocardia... | 06/29/1993 |
| 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 provided with a Doppler ultrasound transceiver at its tip, gener... | 06/22/1993 |
| 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 establishing an invariant cross-section in the vessel wall; ... | 05/04/1993 |
| 5205292 | Removable implanted device An implantable, extractable probe for attachment to a vessel or organ. The probe is made up of an elongate probe body having front and rear ends, and top and bottom sides, the elongate probe body terminating in a flexible tube. The probe has at least one ... | 04/27/1993 |
| 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 ultrasound transceiver at its tip, generating from signals produc... | 03/02/1993 |
| 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 conventional procedure. The reference waveforms are used to strip the... | 02/02/1993 |
