| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 600505000 | Sensing means inserted in blood vessel | 22 |
| 20090062669 | Modular Arterio-Venous Shunt Device and Methods for Establishing Hemodialytic Angioaccess - The present invention provides an implantable modular AV shunt device, which is capable of monitoring and reporting its own patency, and which comprises a plurality of modular components that may be assembled and adjusted by the vascular surgeon during the implantation procedure, using well-known surgical techniques, in order to provide a custom fit and arrangement for the particular patient involved. The device comprises an arterial anastomotic valve that permits blood flowing through an artery to pass into the shunt device, a venous anastomotic valve that permits blood flowing through the shunt device to pass into a vein, a medial flow control unit, a first flexible shunt that carries blood from the arterial anastomotic valve to the medial flow control unit, a second flexible shunt that carries blood from the medial flow control unit to the venous anastomotic valve, and a valve control system. The valve control system is operable to control both the rate at which blood is permitted to enter the shunt device via the arterial anastomotic valve, as well as the rate at which blood is permitted to exit the shunt device via the venous anastomotic valve. | 03-05-2009 |
| 20090216135 | Method, assembly, catheter, and processing device for obtaining an indication of cardiac output - The invention relates to a method for obtaining an indication of cardiac output, comprising the steps of introducing into the bloodstream a liquid with a temperature lower than the temperature of the blood, measuring downstream the temperature variation of the blood, and performing a thermodilution algorithm on the basis of the measured temperature variation of the blood. The invention is distinguished in that the temperature variation is measured upstream of the heart in the blood flow of a vein in which the flow rate is substantially proportional to the cardiac output, and the flow rate in the vein is determined using the thermodilution algorithm. The invention also relates to an assembly, catheter and processing device for obtaining an indication of cardiac output. | 08-27-2009 |
| 20090216136 | Blood flow monitor with arterial and venous 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 blood flow paths. Blood flow is calculated as a function of the change in energy level and the temperature differences in the venous and arterial blood flow paths. | 08-27-2009 |
| 20090247887 | FLOW MEASUREMENT IN GRAFTS - A system for conducting flow measurements in grafts is provided, comprising a graft that further includes a monitor placed within or on the graft, wherein the monitor measures flow. In exemplary embodiments, the monitor is an embedded monitor that is placed within or on a vascular bypass graft that is commonly used for arterial and venous bypass or for hemo-dialysis access, ultrafiltration, or phoresis. The exemplary monitoring system may measure flow by electrical impedance, electronic and/or magnetic flux. An external monitor may also be intermittently applied. Alternately, a continuous reporting can be performed by telepathic signals from the graft transmitter. | 10-01-2009 |
| 20100022899 | DEVICE FOR DETERMINING THE FLOW RATE OF A BLOOD FLOW, AND CARDIOVASCULAR ASSIST DEVICE - A device for the in vivo determination of the blood flow rate in a patient's blood vessel includes a microelectrode arrangement provided for placement in the blood vessel, an electrical power source which provides excitation energy having physiologically harmless parameters for obtaining a measured signal, a signal detector for detecting an electrical measured signal resulting from the blood flow in the presence of the excitation energy at measuring electrodes of the microelectrode arrangement, and a signal evaluation device, connected to the signal detector, for determining the blood flow rate on the basis of the measured signal. | 01-28-2010 |
| 20100228135 | IMPLANTABLE PERFUSION SENSOR - An injectable wireless perfusion sensor provides data to an external device regarding the perfusion of the targeted tissue. The sensor permits a caregiver to monitor cardiovascular performance in specific areas such as the extremities. The sensor will identify whether vascular constriction or obstruction is present and to what extent. Further, once such a condition is treated, the sensor will monitor the effectiveness of that treatment. | 09-09-2010 |
| 20110054333 | Stent Flow Sensor - A stent for placement in a blood vessel of a patient, the stent including: a proximal end, a distal end, and a generally circular cross-section with a diameter; a Micro Electro-Mechanical System (MEMS) ultrasound sensor using a Doppler principle for determining patency and flow rate through the cross-section, and pressure drop from the proximal end to the distal end; a transmitter for providing signals to an external receiver outside the patient's body; and a coil device for receiving energy from outside the patient's body and coupled to the transmitter for powering the transmitter. | 03-03-2011 |
| 20110137186 | DEVICE FOR MEASURING THE BLOOD FLOW OF A BODY TISSUE - A device for measuring the blood flow of a body tissue comprises a catheter having a catheter head for the insertion into the inside of a body tissue and a center piece having a light emission surface, out of which an optical conductor leads, and having a reflection surface, which is disposed opposite of the light emission surface and oriented obliquely to the longitudinal axis of the optical conductor. The optical conductor is disposed such that an emitted light beam is directed at the reflection surface, the emitted light beam can be deflected at the reflection surface and reflected into the body tissue, and a reflected light beam can be reflected out of the body tissue at the reflection surface and fed into the optical conductor. The catheter head is divided into an insertion region and a connecting region, wherein the insertion region comprises a plurality of recesses on the surface thereof. In the direction of the connecting region, the insertion region has an increasing diameter. The recesses are provided in the insertion region such that webs are formed in the direction of the connecting region between the recesses along the surface of the catheter head. | 06-09-2011 |
| 20120165689 | CATHETER WITH COMMON GUIDE WIRE AND INDICATOR LUMEN - 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 induced thermal influences on a dilution thermal sensor, wherein the thermal influences can occur prior to introduction of the injectate into the blood flow. | 06-28-2012 |
| 20120197141 | IMPLANTABLE ECHO DOPPLER FLOW SENSOR FOR MONITORING OF HEMODYNAMICS - Systems, devices and methods of monitoring blood flow velocity are disclosed herein. For example, one method of monitoring blood flow velocity includes: locating a blood flow velocity sensor near the ostium in the coronary sinus; and sensing towards a portion of the aorta. A second example method includes: locating a blood flow velocity sensor in a vein; and sensing towards an adjacent artery. A third example method includes: locating a blood flow velocity sensor near the tricuspid valve; and sensing towards a tricuspid valve annulus. A fourth example method includes: locating a blood flow velocity sensor right ventricular outflow tract; and sensing towards a portion of the aorta. A fifth example method includes: locating a blood flow velocity sensor in the great cardiac vein; and sensing towards a left anterior descending artery. A sixth example method includes: locating a blood flow velocity sensor in the right atrial appendage; and sensing towards a portion of the aorta. | 08-02-2012 |
| 20120215121 | MEMS VASCULAR SENSOR - A micromachined sensor for measuring vascular parameters, such as fluid shear stress, includes a substrate having a front-side surface, and a backside surface opposite the front-side surface. The sensor includes a diaphragm overlying a cavity etched within the substrate, and a heat sensing element disposed on the front-side surface of the substrate and on top of the cavity and the diaphragm. The heat sensing element is electrically couplable to electrode leads formed on the backside surface of the substrate. The sensor includes an electronic system connected to the backside surface and configured to measure a change in heat convection from the sensing element to surrounding fluid when the sensing element is heated by applying an electric current thereto, and further configured to derive from the change in heat convection vascular parameters such as the shear stress of fluid flowing past the sensing element. | 08-23-2012 |
| 20120277604 | MONITORING FLUID VOLUME FOR PATIENTS WITH RENAL DISEASE - A method includes monitoring an indicator of fluid volume of a patient via a sensor device, and setting an initial fluid volume removal prescription for a blood fluid removal session based on the monitored indicator of fluid volume. The method may further include transmitting data regarding the indicator of fluid volume from the implantable sensor device to fluid removal device. In some embodiments, the fluid removal device sets or calculated the initial fluid volume removal prescription based on the data received from the implantable sensor. The indicator of fluid volume may be an indicator of tissue fluid volume or an indicator of blood fluid volume. | 11-01-2012 |
| 20130053711 | Implantable Device for Detecting Variation in Fluid Flow Rate - According to embodiments of the present invention, an implantable device for detecting variation in fluid flow rate is provided. The implantable device includes: a substrate having an active element arrangement; a sensor arrangement having a first portion that is mechanically secured and a second portion that is freely deflectable, the sensor arrangement in electrical communication with the active element arrangement, wherein the active element arrangement is configured to detect changes in deformation of the sensor arrangement and produce an output in response to the detected changes; and at least one inductive element mechanically coupled to the substrate and in electrical communication with the active element arrangement, wherein the inductive element is adapted to power the active element arrangement through inductive coupling to an excitation source, and wherein the inductive element is adapted to transmit the output associated with the detected changes in the sensor. | 02-28-2013 |
| 20130109983 | DILUTION APPARATUS, METHOD AND COMPUTER PROGRAM | 05-02-2013 |
| 20130245469 | Pulmonary Arterial Hemodynamic Monitoring for Chronic Obstructive Pulmonary Disease Assessment and Treatment - Provided herein are methods for assessing, treating, and for developing new treatments for COPD. Methods can involve obtaining one or more PA hemodynamic readings from a subject with COPD, processing the PA hemodynamic readings to obtain one or more PA hemodynamic parameters, and using the one or more PA hemodynamic parameters to assess, treat, and/or develop new treatments for COPD. The methods can optionally be used to evaluate the progress of (COPD) in a subject, or to predict an outcome in a subject having COPD. | 09-19-2013 |
| 20140194757 | SYSTEM FOR DISTRIBUTED BLOOD FLOW MEASUREMENT - A medical system for minimally-invasive measurement of blood flow in an artery (AT). An interventional device (IVD) with an optical fiber (FB) comprising a plurality of temperature-sensitive optical sensor segments, e.g. Fiber Bragg Gratings, spatially distributed along its longitudinal extension is configured for insertion into an artery (AT). A temperature changer (TC) is arranged in the WD to introduce a local change in temperature (ΔT) of a bolus of blood in the artery, to allow thermal tracking over time with the optical fiber (FB). A measurement unit (MU) with a laser light source (LS) delivers light to the optical fiber (FB) and receives light reflected from the optical fiber (FB) and generates a corresponding time varying output signal. A first algorithm (A1) translates this time varying output signal into a set of temperatures corresponding to temperatures at respective positions along the optical fiber (FB). A second algorithm (A2) calculates a measure of blood flow (BF) at respective positions along the optical fiber (FB) in accordance with a temporal behavior of said set of temperatures. Such system can be used to quickly scan an artery for diagnosing stenotic regions without the need for pullbacks or injection of toxic liquids. A good spatial resolution of the blood flow measurement can be obtained in real-time. | 07-10-2014 |
| 20140323887 | THERMODILUTION CATHETER SYSTEMS AND METHODS FOR DETERMINING BLOOD FLOW RATES - Catheter systems and methods for determining blood flow rates based on temperature measurements by thermodilution. The catheter may include a fluid lumen defined between inner and outer tubular members for delivering an indicator fluid, and a guidewire lumen defined by the inner tubular member. The catheter may include fluid infusion openings at the distal end region of the outer tubular member configured to permit the indicator fluid to exit the catheter from the fluid lumen, and a fluid hole located at the distal end region of the inner tubular member configured to permit the indicator fluid to pass from the fluid lumen into the guidewire lumen. A temperature sensor positioned on a guidewire may be positioned within the guidewire lumen to measure the temperature of the indicator fluid entering the guidewire lumen through the fluid hole. A blood flow rate may be calculated based on the measured temperature. | 10-30-2014 |
| 20150038860 | METHOD AND SYSTEM FOR MODELING BLOOD FLOW WITH BOUNDARY CONDITIONS FOR OPTIMIZED DIAGNOSTIC PERFORMANCE - Embodiments include a system for determining cardiovascular information for a patient. The system may include at least one computer system configured to receive patient-specific data regarding a geometry of the patient's heart, and create a three-dimensional model representing at least a portion of the patient's heart based on the patient-specific data. The at least one computer system may be further configured to create a physics-based model relating to a blood flow characteristic of the patient's heart and determine a fractional flow reserve within the patient's heart based on the three-dimensional model and the physics-based model. | 02-05-2015 |
| 20150088015 | METHOD AND SYSTEM FOR PATIENT-SPECIFIC MODELING OF BLOOD FLOW - Embodiments include a system for determining cardiovascular information for a patient. The system may include at least one computer system configured to receive patient-specific data regarding a geometry of the patient's heart, and create a three-dimensional model representing at least a portion of the patient's heart based on the patient-specific data. The at least one computer system may be further configured to create a physics-based model relating to a blood flow characteristic of the patient's heart and determine a fractional flow reserve within the patients heart based on the three-dimensional model and the physics-based model. | 03-26-2015 |
| 20150099989 | BLOOD FLOW RATE MEASUREMENT DEVICE - A blood flow rate acquisition device which does not require an injection operation for injecting a cooling saline into a blood vessel and can acquire a blood flow rate inside the blood vessel includes an elongated member that is insertable into a blood vessel, a flow velocity measuring member that is disposed in a distal end of a distal end portion of the elongated member in order to measure a flow velocity of blood flow, a cross-sectional area measuring member that is disposed on a side surface in the distal end portion of the elongated member in order to measure a cross-sectional area of a lumen of the blood vessel, and an acquisition device that acquires the blood flow rate by using detection values detected by the flow velocity measuring member and the cross-sectional area measuring member. | 04-09-2015 |
| 20150112215 | CATHETER SYSTEMS AND METHODS FOR DETERMINING BLOOD FLOW RATES WITH ACOUSTIC DILUTION - Catheter systems and methods for determining blood flow rates based on speed of sound measurements. The catheter may include a lumen extending between a proximal end of the catheter and a distal end of the catheter. The catheter may include fluid infusion openings at the distal end region of the catheter that are configured to permit the indicator fluid to exit the catheter from the lumen. The catheter system may include a guidewire having one or more sensors thereon for sensing speed of sound in a body vessel lumen and/or in a lumen of the catheter. The sensors may sense a sound sent through the catheter to the body vessel lumen. A blood flow rate may be calculated based on the measured speeds of sound. | 04-23-2015 |
| 20150320357 | METHODS FOR ASSESSING FLUID FLOW THROUGH A CONDUIT - A method for assessing fluid flow in a conduit includes sensing the fluid flow with a sensor and generating data from the sensor that relates to the sensed fluid flow. The data is output from the sensor and filtered so that it may be interpreted to characterize the fluid flow. The conduit may be a prosthesis such as stent, a stent-graft or a prosthetic vascular graft and the flow may be any body fluid such as blood, bile, or cerebrospinal fluid. | 11-12-2015 |
