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Measuring blood flow in body portion other than heart

Subclass of:

600 - Surgery

600300000 - DIAGNOSTIC TESTING

600481000 - Cardiovascular

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
600506000 By detecting electrical impedance of body portion 18
600505000 Sensing means inserted in blood vessel 12
600507000 By detecting volume of body portion 7
Entries
DocumentTitleDate
20090024043Methods, Devices and Systems for the Prevention of Sudden Infant Death Syndrome (SIDS) and the Diagnosis and Treatment of Infants Predisposed to SIDS - Methods and systems for preventing the underlying anatomical cause that gives rise to a predisposition to SIDS are provided. Methods and systems are provided for the diagnosis of infants predisposed to SIDS. Methods and systems are provided for the therapeutic treatment of infants predisposed to SIDS. A treatment device includes an auditory stimulation system, a monitoring system, a warming system and a response system that can respond to and alleviate crisis situations.01-22-2009
20100042007SYSTEM FOR REPETITIVE MEASUREMENTS OF CARDIAC OUTPUT IN FREELY MOVING INDIVIDUALS - A system for evaluating the cardiovascular system parameters using indicator dilution and non-invasive or minimally invasive detection and calibration methods are disclosed. Intravascular indicators are stimulated, and emissions patterns detected for computation of cardiac output, cardiac index, blood volume and other indicators of cardiovascular health.02-18-2010
20130060155EAR-CARRYING HEART BEAT DETECTION DEVICE - The present invention relates to an ear-carrying heart beat detection device, which includes a device body, an attaching structure, an ear clip, an extension assembly, a control circuit and a wrist watch unit. The attaching structure is coupled to the device body. The ear clip includes a blood flowrate sensor to detect variation of blood flowrate through a user's earlobe. The extension assembly adjusts the relative distance of the ear clip with respect to the device body. The control circuit is arranged inside the device body and the control circuit transmits a heart beat signal to a wrist watch unit in a wireless manner to allow the user to inspect the condition of heart beat of his or her body and to adjust the time period and style of exercise according to the heart beat information.03-07-2013
20090270745BLOOD FLOW MEASURING APPARATUS AND BRAIN ACTIVITY MEASURING APPARATUS USING THE SAME - A blood flow measuring apparatus includes a sensor unit including a light emitter configured to emit light onto a measurement area and a light receiver configured to receive the light transmitted through the measurement area; at least one more light receiver configured to receive the light transmitted through the measurement area; and a control part configured to measure a blood flow state of the measurement area according to signals outputted by the light receivers. The light emitted by the light emitter is received by the light receivers arranged at different distances from the light emitter and the light receivers output the signals responsive to the received light. The control part measures the blood flow state of the measurement area by performing an arithmetic process to cancel a component of oxygen saturation in the blood, said component being included in the signals outputted by the light receivers.10-29-2009
20130066219Method for Assessing The Efficacy of a Flow-Diverting Medical Device in a Blood Vessel - A method for producing a computational flow dynamics model for assessing the efficacy of the deployment of a flow-diverting device in a blood vessel of a patient is provided. Image data of the patient is acquired with a medical imaging system, from which images depicting the blood vessel are reconstructed. A pre-treatment blood vessel model is generated by segmenting the reconstructed images. This pre-treatment blood vessel model is then used to generate a post-treatment, or post-deployment, model of the blood vessel. A post-deployment model of the flow-diverting device is generated and used together with the post-treatment blood vessel model to generate a computational flow dynamics model.03-14-2013
20120116236Hydration and blood flow adjusted glucose measurement - The invention provides a system and method for using OCT to determine hydration and blood flow variation adjusted glucose measurement in a target of interest. For some target, including a target of a living human, the invention provides for the measurement of tissue components, for determination of hydration level and blood flow variations of target, for non-invasive determination of glucose in target, and for hydration-adjusted and blood flow compensated glucose measurement in target.05-10-2012
20090198143RAPID THERMAL DETECTION OF CARDIAC OUTPUT CHANGE - An improved system for measuring changes in blood flow, particularly in the context of an automatic arrhythmia treatment device. The system includes a heater, exposable to a bloodstream, a driver providing power to the heater, a temperature sensor, isolated from the blood stream and thermally coupled to the temperature of the heater and a measurement circuit coupled to the temperature sensor, providing signals indicative of blood flow. The system may include an intravascular lead having a lead body wherein the heater is mounted to the lead body so as to dissipate its generated heat into the blood. The heater and temperature sensor may be thermally insulated from the lead body and the heater and the temperature sensor may be on substantially a single isotherm during operation.08-06-2009
20120238888COLLATERAL BLOOD FLOW ASSESSMENT - A method includes obtaining both first inflow and first perfusion metrics for non-healthy tissue of interest, obtaining both second inflow and second perfusion metrics for healthy tissue of interest, and concurrently presenting both the first flow and perfusion metrics for the non-healthy tissue of interest and both the second flow and perfusion metrics for the healthy tissue of interest.09-20-2012
20090281436Low-frequency wireless heartbeat detector hanging over the ear - A low-frequency wireless heartbeat detector hanging over the ear includes: a) an ear-hanging unit hanging over the ear and having an internal portion and an external portion, the internal portion leaning against the internal side of the earlobe of a user, thereby creating a supporting effect; and b) a wireless heartbeat detector attached to the external portion of the ear-hanging unit, at least one part thereof leaning against the external side of the earlobe of the user such that a reflection type heartbeat-sensing element detects the slight blood change in the blood capillary of the earlobe created by heartbeat, thereby receiving the heartbeat impulse signal of the user which is then transmitted to a display unit having a receiver in a low-frequency wireless transmission way.11-12-2009
20090048525Venous refill testing system and method - A venous refill testing system includes a sensor for sensing patient blood volume at a testing location along a patient's leg during and after dorsiflexion of the patient's foot, and a controller unit having means for automatically determining a time of cessation of dorsiflexion of the patient's foot and for automatically evaluating whether a venous refill time following the time of cessation of dorsiflexion of the patient's foot is less than approximately twenty seconds. The sensor is operably connected to the controller unit, and the controller unit can be actuated to initiate sensing of patient blood volume with the sensor.02-19-2009
20080312545METHOD AND DEVICE FOR MEASURING BLOOD FLOW IN THE BONE AFTER A FRACTURE - A method and device for measuring blood flow in the bone after a fracture, wherein a hole is drilled into the bone. The method includes the steps of inserting the metal sleeve of an osteoscope into the hole; inserting the optics of an osteoscope into the metal sleeve and focused on the cavity created by the drill; filling the device and the cavity with a physiological solution such that the pressure of the solution is above the systolic blood pressure; decreasing the pressure of the solution while observing the cavity through the osteoscope, and recording the pressure in the system at the commencement of bleeding.12-18-2008
20090149764Circulation monitoring system and method - A lightweight portable probe or transducer containing a transmissive or reflective electro-optical emitter and receptor in the infrared spectrum is fitted on a subject's finger or toe. Associated electronics energize and monitor the probe, detect cardio-rhythmic fluctuations therefrom, and process digital data over a prescribed window to produce a non-invasive, qualitative or quantitative measure of the subject's circulation. In accordance with one embodiment of the invention, a simple tri-color LED array is used to indicate the subject's circulation as being normal, reduced, or borderline.06-11-2009
20110130668BLOOD FLOW PERFUSION ANALYZING APPARATUS, BLOOD FLOW PERFUSION ANALYZING METHOD, FLUID ANALYZING APPARATUS AND FLUID ANALYZING METHOD - According to one embodiment, a blood flow perfusion analyzing apparatus includes tissue and arterial TCC calculation units, first and second making units, a deconvolution unit and a blood flow information calculation unit. The tissue TCC calculation unit obtains tissue TCCs. The arterial TCC calculation unit calculates an arterial TCC. The first making, unit makes first sets, starting from a first time in which elements corresponding to the tissue are arrayed one-dimensionally, based on the tissue TCCs. The second making unit makes a second set, starting from a second time after the first time, in which elements corresponding to the artery are arrayed two-dimensionally, based on the arterial TCC. The deconvolution unit calculates transfer functions of the tissue based on the first and second sets. The blood flow information calculation unit calculates information on a blood flow perfusion based on the transfer functions.06-02-2011
20100249621BLOOD FLUIDITY MEASUREMENT APPARATUS AND BLOOD FLUIDITY MEASUREMENT METHOD - Deformability of blood cells is quantified in a short time. A blood fluidity measurement apparatus is provided with a TV camera which photographs a stream of blood in either two areas of the internal area, entrance area, and exit area of a gate, an image processing part which calculates the velocity of the blood cells contained in the blood from the image taken by the TV camera, and a deformability calculation means which calculates the deformability of the blood cells a blood fluidity from the velocity.09-30-2010
20100249620USE OF BLOOD FLOW PARAMETERS TO DETERMINE THE PROPENSITY FOR ATHEROTHROMBOSIS - A method for determination of the risk of atherothrombosis that includes determining blood shear stress based on blood viscosity and comparing the blood shear stress to a critical threshold blood shear stress indicative of the propensity of plaque to rupture.09-30-2010
20100036268Circulatory monitoring systems and methods - Systems and methods are described for obtaining and acting upon information indicative of circulatory health and related phenomena in human beings or other subjects.02-11-2010
20100036269Circulatory monitoring systems and methods - Systems and methods are described for obtaining and acting upon information indicative of circulatory health and related phenomena in human beings or other subjects.02-11-2010
20090177098Examination System and Examination Method - The blood flow is examined by making multifractal analysis of a blood flow velocity distribution in a vascular network and detecting a deviation of the blood flow velocity distribution from the multifractal distribution. The blood flow velocity distribution is provided as an image by irradiating laser light to the vascular network, converging, by an imaging lens, scattered laser light rays by blood cells in the blood flowing through blood vessels, detecting, by a photodetector, a speckle pattern produced owing to random interference between the scattered laser light rays and calculating the rate of change with time lapse of each speckle in the speckle pattern.07-09-2009
20100069765System, Method and Apparatus for Measuring Blood Flow and Blood Volume - A method of calculating blood flow in an organ of a subject using output radiofrequency signals transmitted to the organ and input radiofrequency signals received from the organ, the method comprises determining a phase shift of the input radiofrequency signals relative to the output radiofrequency signals and using the phase shift to calculate the blood flow in the organ.03-18-2010
20090149765METHOD AND SYSTEM FOR OBTAINING DIMENSION RELATED INFORMATION FOR A FLOW CHANNEL - A method and system for determination of dimension related information such as volumetric flow rate(s) of a fluid flowing through a channel. In one implementation, the method and system analyzes temporal changes in a moving fluid's velocity profile to calculate the fluid channel dimensions. In turn, the fluid channel dimensions and the fluid velocity profile data may be combined to calculate the volumetric flow rate of the fluid flowing through the channel. In this regard, the geometry of the channel can be characterized using dimensionless variables that relate dimensions, such as the radius across a circular cross-section, to the largest extent of a dimension. For example, in the case where the channel is a cylindrical tube and a pressure gradient is applied long enough for the fluid to have reached a steady state, the dimensionless radius will be the radius at any point divided by the overall radius of the tube. One or more dimensionless variables can be used to characterize geometries: for instance, one dimensionless radius characterizes a circular tube and two dimensionless terms characterize an elliptical tube (one for the major axis and one for the minor axis). The time required for velocity profiles to change from one shape to another may be characterized by dimensionless time. Dimensionless time, in turn, uses the fluid's viscosity and density along with time and overall channel dimensions and may be used in combination with at least one velocity profile to calculate the volumetric flow rate of the fluid flowing through the channel.06-11-2009
20100125214Assessing a subject's circulatory system - An apparatus including an input interface configured to provide signals from at least two sensors for at least two postures including: signals, dependent upon blood presence, from a first sensor when a subject is in a first posture; signals, dependent upon blood presence, from the first sensor when the subject is in a second posture; signals, dependent upon blood presence, from a second sensor when the subject is in the first posture; and signals, dependent upon blood presence. from the second sensor when the subject is in the second posture; and processing circuitry configured to determine and output a metric by combining, according to pre-defined calibration data the provided signals.05-20-2010
20090281437Application of Nanotechnology for Blood Flow Meters - Conventional blood flow meter can be combined with photonic crystals to measure temperature change for heat washin/washout. These photonic crystals are impregnated into conventional devices as a thermometer. It makes the entire device more compact and easier for patients.11-12-2009
20090287101Circulatory monitoring systems and methods - Systems and methods are described for obtaining and acting upon information indicative of circulatory health and related phenomena in human beings or other subjects.11-19-2009
20120296224SENSOR DETERMINING A PHYSICAL OR PHYSIOLOGICAL PARAMETER - The present invention relates to determining or measuring a biological, physical or physiological parameter of an object (11-22-2012
20110208072DEVICE FOR DETERMINING THE BLOOD VOLUME AND/OR BLOOD VOLUMETRIC FLOW AND METHOD FOR OPERATING THE SAME - The invention relates to a device (08-25-2011
20130218034System for quantifying blood flow in tissue and updating tissue baseline conditions - Methods and apparatus for determining blood flow in tissue are disclosed. The methods and apparatus are used to establish a baseline for both thermal properties of the tissue and non-physiologic conditions. Periodic changes in either or both constituents of the baseline are determined and, when the changes correspond to a need for a new baseline, a new baseline is established.08-22-2013
20080208066IMPLANTABLE TISSUE PERFUSION SENSING SYSTEM AND METHOD - A medical device for sensing cardiac events that includes a plurality of light sources capable of emitting light at a plurality of wavelengths, and a detector to detect the emitted light. A processor generates an ambient light measurement in response to ambient light detected by the detector, generates a plurality of light measurements in response to the emitted light detected by the detector, and adjusts the plurality of light measurements in response to the ambient light measurement.08-28-2008
20120143071ALGORITHMS FOR CALCULATION OF PHYSIOLOGIC PARAMETERS FROM NONINVASIVE PHOTOPLETHYSMOGRAPHIC SENSOR MEASUREMENTS OF AWAKE ANIMALS - A noninvasive photoplethysmographic sensor system for mobile animals such as small rodents, namely rats and mice is useful such as in a laboratory research environment. The noninvasive photoplethysmographic sensor for mobile animals such as small rodents utilizes multiple FFT's in the processing of the phtotoplethysmograophic signal, where each FFT has a different time record of the signals such as a number of points, or a zero padded FFTs. The noninvasive photoplethysmographic sensor for mobile animals provides actigraphy measurements for the animal.06-07-2012
20090182240APPARATUS AND SENSOR FOR MEASURING BIOLOGICAL SIGNAL AND APPARATUS AND METHOD FOR MEASURING PULSE WAVE VELOCITY - Provided is an apparatus for measuring a biological signal. The apparatus includes a first surface having a first sensor which is attached to a predetermined part of a user's body and measures a first biological signal generated by the predetermined part; and a second surface having a second sensor which is attached to the user's finger and measures a second biological signal generated by the finger. Therefore, a user can easily check his or her health condition without being limited by time or place.07-16-2009
20080234590Apparatus and Method for Detecting Blood Flow - A method and apparatus for detecting blood flow in or at a subject's fingertip (09-25-2008
20090143688INFORMATION PROCESSING APPARATUS, INFORMATION PROCESSING METHOD AND PROGRAM - An information processing apparatus according to the present invention includes an imaging section which emits light to a part of a biologic body at predetermined time intervals and images a vein in the biologic body so as to generate imaged data about the vein, a vein pattern extracting section which extracts vein patterns from the imaged data about the vein, a time change detecting section which detects a time change in the vein patterns, a blood flow volume calculating section which calculates a blood flow volume in the vein based on the time change in the vein patterns, and a processing section which executes a predetermined process based on the time change in the vein patterns and a time change in the blood flow volume.06-04-2009
20110224562THERMOGRAPHIC PLATE FOR THE DETECTION OF TRACES OF BLOOD FLOW IN VESSELS AT DIFFERENT DEPTH - A method for selective detection, with a thermographic plate, of traces of blood flow that differ from traces with a correct course in vessels at different depths, particularly of the breast, which consists in that a sequence of thermographic images is taken which are acquired by a thermographic plate gently pressed against the skin, which is cooled before each photograph with an air jet whose duration is correlated to the depth of the portion of vessel being investigated, the traces of vessels with a correct course having a substantially centripetal direction with respect to the breast and tapering toward the center of the organ so as to confirm a temperature of the blood flow which decreases because the vessel gradually branches and because the depth from the surface of the skin increases.09-15-2011
20090275845METHOD AND DEVICE FOR THE NON-INVASIVE DETECTION OF BLOOD FLOW AND ASSOCIATED PARAMETERS IN PARTICULAR ARTERIAL WAVEFORM AND BLOOD PRESSURE - A method and a device for the non-invasive determination of blood flow and associated parameters in arteries, in particular the arterial waveform and the blood pressure. According to said method, a sensor having at least one deformable contact portion is placed on a tissue surface, essentially over an artery, and the contact portion is subjected to a temporally variable and defined external force, F(t). The deformation of the contact portion by the blood flow inside the artery in response to said force F(t) is measured.11-05-2009
20090204012Apparatus and method for determining a physiological parameter - An apparatus for determining a physiological parameter of a patient, such as cardiac output, comprises a sensor device providing readings of a blood variable, memory means storing the readings as a curve over time, evaluation means determining a mean value from the curve and determining the physiological parameter using the mean value is provided. The evaluation means determine a spectral density of the curve and/or a variance. The evaluation means also determine at least one model parameter representing an effective value of a heart beat using the mean value and the spectral density and/or variance. The effective value is selected from an effective amplitude of the heart beat, an effective duration of the heart beat and an effective area under the heart beat. The physiological parameter is determined using at least one of the model parameters.08-13-2009
20100185106LIGHT-EMITTING APPARATUS, PARTICULARLY FOR FLOW MEASUREMENTS - The invention relates to a light-emitting apparatus (07-22-2010
20100262024HEART RATE VARIABILITY MEASUREMENT METHOD - A heart rate variability measurement method is revealed. The method includes the following steps. At first, play a piece of music for a participant. Then detect a change in vascular volume of the participant. Next depict a continuous waveform signal of the change in vascular volume. Thus while measuring the heart rate as well as heart rate variability, the participant is not easy to get nervous or impatient and the real heart rate as well as heart rate variability can be obtained, without being affected by the mood. Therefore, the accuracy of the heart rate variability during measurement is increased.10-14-2010
20110060232RETINAL FLOW CYTOMETRY - The present invention provides methods and devices for performing flow cytometry. In one embodiment, blood circulating through one or more retinal blood vessels of a subject is illuminated in-vivo so as to excite a plurality of fluorescent-labeled cells contained in the blood. The fluorescence radiation emitted by the excited cells is then detected and analyzed to count the cells from which fluorescence is detected.03-10-2011
20080208067IMPLANTABLE TISSUE PERFUSION SENSING SYSTEM AND METHOD - A medical device for sensing cardiac events that includes a plurality of electrodes sensing cardiac signals utilized to identify a cardiac event, a plurality of light sources capable of emitting light at a plurality of wavelengths, and a detector to detect the emitted light. A processor determines a plurality of light measurements in response to the emitted light detected by the detector, and generates a blood volume index in response to a light source of the plurality of light sources emitting light at an isobestic wavelength. The blood volume index is then utilized to verify the identifying of the cardiac event.08-28-2008
20100241016System for quantifying blood flow in tissue and updating tissue baseline conditions - Methods and apparatus for determining blood flow in tissue are disclosed. The methods and apparatus are used to establish a baseline for both thermal properties of the tissue and non-physiologic conditions. Periodic changes in either or both constituents of the baseline are determined and, when the changes correspond to a need for a new baseline, a new baseline is established.09-23-2010
20100217138Recognizing awareness in an anesthetized subject - A method for recognizing awareness in a subject includes performing optical imaging on at least one cortical region of the brain of the subject. Optical imaging data are obtained over time measuring one or more hemodynamic parameters in the at least one cortical region of the subject's brain. An observed variation pattern is determined in the measured hemodynamic parameters, and the observed variation pattern is compared to one or more known variation patterns characteristic of awareness. Substantial similarity between the observed and known variation patterns signals awareness in the subject.08-26-2010
20100241015OPTICAL SYSTEMS FOR DIAGNOSING AND MONITORING DERMAL MICROVASCULAR HEALTH - The invention generally relates to a device for assessing dynamic microvascular refill (DMR), a novel measure of microvascular function. Microvascular refill is determined under dynamic conditions by monitoring changes in fingernail reflectance spectra in response to small shear forces applied to the fingernail. A hemodynamic model is described to examine the physiological significance of observed signals. The invention will provide healthcare workers with a simple, user friendly, non-invasive method of rapidly assessing microvascular function that would greatly facilitates the early detection and monitoring of the onset and treatment of vascular diseases.09-23-2010
20100069766MEASURING APPARATUS - Provided is a measuring apparatus that includes: a semiconductor laser device that emits a laser light beam to an object to be measured; a driving unit that provides a driving signal for modulation drive of the semiconductor laser device; a first detection unit that detects a first electrical signal that corresponds to the intensity of the laser light beam modulated due to the self-coupling effect, in a first half-cycle of the driving signal; a second detection unit that detects a second electrical signal that corresponds to the intensity of a second laser light beam modulated due to the self-coupling effect, in a second half-cycle of the driving signal being in an opposite phase of the first half-cycle; a calculation unit that calculates a difference between the first and second electrical signals; and a measuring unit that measures a change in the state of the object based on the calculated difference.03-18-2010
20100056936BLOOD FLOW RATE IMAGING DEVICE - Provided is a blood flow rate imaging device that can automatically distinguish an artery and a vein from a blood flow rate obtained on a time series blood flow map. A blood flow rate imaging device of the present invention includes a laser beam irradiation system (03-04-2010
20110178418SYSTEM AND METHOD FOR DETERMINING BLOOD FLOW - A method of diagnosis is disclosed. The method comprises: acquiring an absolute component and a phase component of an input signal indicative of an impedance of an organ of a subject; determining baseline blood flow of the subject based on the phase component; determining transient changes in blood flow based on at least the absolute component; and displaying the baseline blood flow and the transient changes in blood flow.07-21-2011
20100056935OPTIC FUNCTION MONITORING PROCESS AND APPARATUS - A method and apparatus for monitoring optic function is provided. The apparatus and method relies on two principle modes of measuring the function of the optic nerve, namely, monitoring VEPs for neural function, and monitoring at least one additional parameter of optic function such as intraocular pressure, blood flow or location of the eye to provide a multi-variable optic function monitor. The method and apparatus is proposed for the use to diagnose and potentially prevent the incidence of POVL and anaesthesia awareness in patients during medical procedures.03-04-2010
20100130880APPARATUS AND METHODS FOR MONITORING BLOOD FLOW IN THE PROSTRATE GLAND - A system for detecting blood flow in the prostate comprises a blood flow sensor disposed on a catheter that can be inserted into a subject's urethra so that the blood flow sensor is located to detect blood flow in the subject's prostate gland. The sensor may be a sensor of a near infrared spectroscopy (NIRS) system configured to detect in the prostate one or more biocompounds indicative of blood flow. An output of the sensor may provide an input to a controller for a heater disposed to heat tissues of the prostate. Some embodiments comprise one or more additional sensors for detecting blood flow and/or temperature of a portion of the subject's rectal wall adjacent to the prostate gland. In such embodiments, outputs from the additional sensors may provide additional inputs to the controller.05-27-2010
20110251503DEVICE FOR MONITORING BLOOD FLOW TO BRAIN - A method of estimating blood flow in the brain, comprising: 10-13-2011
20090018455METHOD AND APPARATUS FOR TREATING A CAROTID ARTERY - One disclosed embodiment comprises a method for treating lesions in the carotid artery of a mammalian body. The method comprises transcervical access and blocking of blood flow through the common carotid artery (with or without blocking of blood flow through the external carotid artery), shunting blood from the internal carotid artery and treating the lesion in the carotid artery.01-15-2009
20090209871APPARATUS FOR MEASURING BLOOD FLOW RATE AND METHOD FOR MEASURING BLOOD FLOW RATE - Provided is an apparatus for measuring blood flow rate that includes a light emitting portion for irradiating living tissues with laser light, a photo-detector for detecting at least one of reflection, scattering, or absorption of the laser light, and an operation portion for calculating blood flow rate based on the difference between the spectrum of the laser light from the light emitting portion and the spectrum of the light detected by the photo-detector. The spectrum of the laser light has plural peaks.08-20-2009
20080214943Detection of Blood Flow Using Emitted Light Absorption - Perfused tissue is illuminated and light passing through the tissue or reflected from it is detected to produce an electrical signal. Amplitude pulses corresponding to the subject's heart beat are detected in the electrical signal and the areas of these pulses are calculated to produce blood flow values indicative of the blood volume pumped by the heart. The blood flow values may be used alone or in combination with other measured cardiac parameters to evaluate cardiac function.09-04-2008
20110118615Method and system for obtaining improved data perfusion measurements - A method of deriving blood perfusion indices for a region of interest (ROI) of a subject, comprising the steps of administering a contrast agent to the subject during a dynamic imaging scan, converting signal intensity data from raw images of the scan into contrast agent concentration data, deriving parameters from the contrast agent concentration data using at least one transport function that accounts for delay and dispersion of the contrast agent, and calculating the blood perfusion indices from the derived parameters.05-19-2011
20100324432METHOD AND DEVICE TO DETECT EATING, TO CONTROL ARTIFICIAL GASTRIC STIMULATION - In a method and device for detecting the intake of food in a subject at least one parameter related to the blood flow and/or perfusion of a blood vessel and/or an organ in the digestive system of a patient is monitored by a sensor attached to, or in, a blood vessel or organ of the digestive system. The value of each monitored parameter is analyzed and may be used to control the activity of a gastric stimulator.12-23-2010
20100324431Determining Disease State Using An Induced Load - The present disclosure relates to determining a patient's disease state based at least in pail on obtaining or determining certain underlying characteristics, such as vasotone, venous compliance, or ability of the vascular system to drain venous blood, of the patient's vascular system. The characteristics may be obtained by analyzing changes to a patient signal, such as the overall signal change, the rate of change, the shape of the change, changes in signal energy, or changes in the baseline and/or the amplitude of the signal, and/or the time period(s) over which the signal changes, that are caused by inducing a load on the vascular system. In some embodiments, the signal changes may be analyzed by transforming the signal using, for example, a continuous wavelet transform. The patient's health status or disease state may be determined using the one or more vascular system characteristics that influenced the signal change.12-23-2010
20100022898MEASUREMENT OF CARDIAC OUTPUT AND BLOOD VOLUME BY NON-INVASIVE DETECTION OF INDICATOR DILUTION - A system for evaluating the cardiovascular system parameters using indicator dilution and non-invasive or minimally invasive detection methods is disclosed. Intravascular indicators are stimulated, and emissions patterns detected for computation of cardiac output, cardiac index, blood volume and other indicators of cardiovascular health.01-28-2010
20110218448PERFUSION DETECTION DEVICES AND METHODS OF USING THE SAME - Hand-held pocket-sized self-contained perfusion detection devices are provided. Devices of the invention are configured to rapidly provide a perfusion detection result without the need for pre-calibration. Also provided are methods of using the perfusion detection devices, as well as kits that include the devices and/or components thereof for use in practicing such methods.09-08-2011
20100292591Venous measurement system - A system and plethysmographic test procedure for evaluating venous blood volume/flow at a subject's legs. Occluding and sensing cuffs mounted to a subject's thighs and calves/ankles are inflated and deflated relative to controlled movement of a supporting chair. The chair provides hinged backrest, seat and footrest pieces and is controlled to manipulate the subject during several test phases as blood volume/flow is monitored. The chair is manipulated between a 1) baseline calibration position with the subject's back upright, seat horizontal to floor and feet lowered, 2) an outflow position with the subject's back tipped back flat and legs elevated above the heart, 3) a dependent filling position, rapid return of subject to back upright, seat horizontal to floor and feet lowered, and 4) an exercise position wherein the ankles are flexed with the back upright, seat horizontal to the floor and feet lowered. “Outflow”, “dependent filling”, “exercise” and “ejection fraction” flow values are determined relative to measured tracings exhibiting venous volume/flow changes in the legs.11-18-2010
20120041318METHOD 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 patient's heart based on the three-dimensional model and the physics-based model.02-16-2012
20120004562DYNAMIC MOTION CONTRAST AND TRANSVERSE FLOW ESTIMATION USING OPTICAL COHERENCE TOMOGRAPHY - The methods described herein are methods to ascertain motion contrast within optical coherence tomography data based upon phase variance. The phase variance contrast observes the nanometer scale motion of scatterers associated with Brownian motion and other non-flow motion. The inventive method of calculating motion contrast from the phase variance can differentiate regions of different mobility based on the motion contrast differences, and can use the phase information to characterize mobility properties of the scatterers. In flow regions, the inventive method for acquiring and analyzing motion contrast can identify the regions as well as characterize the motion. Furthermore, the inventive method can determine quantitative flow estimation, the index of refraction variations, and absorption variations within flow regions.01-05-2012
20120059269Worksheet System for Determining Measured Patient Values for Use in Clinical Assessment and Calculations - A system determines measured patient values for use in clinical calculations using an electronic form including, a first area including data fields for presenting values of the parameters associated with a first part of a cardiac catheterization study of a patient and a second area including data fields for presenting values of the parameters associated with a different second part of a cardiac catheterization study of the patient. A user interface enables a user to copy at least one of the parameters comprising a measured value from the first area to the second area as a substitute value eliminating a need for a re-measurement of the value. A calculation processor automatically calculates a cardiac flow value for incorporation in the second area in response to the measured value being copied into the second area.03-08-2012
20110092832SELF-LUMINOUS SENSOR DEVICE - A light-emitting sensor device is provided with: a substrate (04-21-2011
20120071769METHODS OF PRODUCING LASER SPECKLE CONTRAST IMAGES - Methods of imaging are provided. In some embodiments, the methods may comprise obtaining a raw speckle image of a sample, converting the raw speckle image to a laser speckle contrast image using a laser speckle contrast algorithm, and converting a laser speckle contrast image to a relative correlation time image using a relative correlation time algorithm.03-22-2012
20120130262Method and Apparatus For Early Warning of Critical Care Patient Hemodynamic Instability - A method and apparatus for providing a computing environment for a user which gives early warning of critical care patient instability. The method and apparatus use the entropy of monitored channels which are paired, each channel being paired once with each other channel. The entropies within each pair are compared to create an information exchange ratio. The information exchange ratios are integrated and a maximum of the integrated information exchange ratios is determined. Then, an alarm condition occurs at a user determined percentage of the maximum integrated information exchange ratio.05-24-2012
20110184295Blood Analysis - Blood analysis is carried out using a portable video camera with an objective lens, by placing the video camera such that the objective lens is completely obstructed, at least partly by at least part of an appendage forming part of an individual, and operating the video camera. The image signals from the video camera are then analysed to deduce information about blood flow in the appendage. This information may concern blood flow (e.g. pulse rate) or blood constituents. The video camera may form part of a mobile phone, and the objective lens may be completely obstructed by a fingertip. The resulting data may be displayed in real-time on the mobile phone.07-28-2011
20100262025APPARATUS FOR MEASUREMENT OF HEART RATE VARIABILITY - The present invention provides an apparatus for measurement of heart rate variability, comprising a main body of a earphone to be inserted into a patient's ear, a light source disposed on one side of the main body, emitting light projected onto the skin of the patient's ear, and a sensor disposed on the same side of the main body with the light source, receiving a reflection light from the skin of the patient's ear, and accordingly generating and transmitting a sensing signal to an analyzer for measurement of the heart rate variability. Thus, the heart rate variability of the patient can be measured by operation of the light source and the sensor when the patient is listening to the music through the earphone. In this way, true heart rate variability, without being affected by the patient's nervousness or impatience, can be derived.10-14-2010
20120215120NONINVASIVE CUTANEOUS BLOOD FLOW ASSESSMENT AS A RESPONSE PREDICTOR FOR VISIBLE LIGHT THERAPY ON SEGMENTAL VITILIGO - Visible light is a treatment option for Segmental Vitiligo (SV), and visible light-induced repigmentation is associated normalization of sympathetic. Currently it is difficult to predict individual patient's response to visible light therapy. Therefore, the present invention uses the Laser Doppler Flowmeter to serve as a response predictor for visible light on treating SV. The present invention recruited 14 Segmental Vitiligo patients for evaluating clinical information. FirstLaser Doppler Flowmeter was used to evaluate the cutaneous blood flow of SV lesion and contralateral normal skin, and then treated them with visible light irradiate, cold-stress, rewarmed, and recorded the change of skin blood flow, finally the patients received regular visible light treatment for 3 months, and patients have a sign of repigmentation after the treatment.08-23-2012
20100298728Signal Processing Techniques For Determining Signal Quality Using A Wavelet Transform Ratio Surface - According to embodiments, a wavelet transform ratio surface measure signal may be generated from two PPG signals. Values of the wavelet transform ratio surface measure signal at a given moment of time (i.e., instantaneous values) may be indicative of localized signal discrepancies within and/or between the PPG signals such as noise and signal artifacts. Spikes in the instantaneous values of the wavelet transform ratio surface measure signal may be located and used to determine a signal quality measure for the PPG signals. Characteristics of the spikes such as number, location, grouping, distribution, amplitude, and polarity may be used in the signal quality determination.11-25-2010
20110137185Saddle Faced Small Animal Sensor Clip - A noninvasive photoplethysmographic sensor platform for small animals provides a spring biased sensor clip, wherein at least one side of the sensor clip is provided with a saddle faced clip face member. The saddle shape of the clip face member may have a hinge end, toward the hinge of the clip, which is longer in the longitudinal direction of the clip and shorter in depth than the distal end. The shorter distal end side (measured longitudinally) of this saddle shape facilitates the ability to align the transmitted and received light with the bone, while the overall saddle shape of the facing provides a physical grip to capture enough tissue to prevent the clip from relocating over time while it is attached to the limb. The shorter hinge end side (depth-wise) also allows the clip to close when it is fully assembled. The edges of the saddle shaped clip are preferably rounded off to prevent the contusions of the tissue that may result from long-term contact. This saddle faced feature works well on only one side of the clip.06-09-2011
20080221465Display of target cardiac flow based on cardiac index calculation - User interfaces for medical perfusion systems that provide oxygenation, filtering, and recirculation of blood in connection with various medical procedures are provided. In particular, methods of displaying and communicating a desired target flow rate and cardiac index during cardiopulmonary bypass surgeries are provided.09-11-2008
20100280398LASER DOPPLER BLOOD FLOW MEASURING METHOD AND DEVICE - [Subject] To provide laser Doppler blood flow measuring method and device which achieve multi-dimensional measurement efficiently at a high degree of accuracy over a wide range with a simple optical system and device.11-04-2010
20110319775BLOOD FLOW IMAGE DIAGNOSING DEVICE - The present invention provides a blood flow image diagnosis device comprising: a laser beam irradiation system that irradiates an observation region of a body tissue with a laser beam; a light receiving system having a light receiver including a large number of pixels that detects reflected light from the observation region of the body tissue; an image capture section that continuously captures a plurality of images for a specified time that is one or more cardiac beats on the basis of a signal from the light receiver; an image storage section that stores the plurality of images; an arithmetic section that calculates a blood flow rate in the body tissue from the time variation of the output signal of each pixel corresponding to the plurality of the stored images; and a display section that displays the two-dimensional distribution of the calculation result as a blood flow map; wherein the blood flow image diagnosis device has a function for analyzing the blood flow map, the arithmetic section has a function that separates a blood flow of a blood vessel observed in a surface layer in the observation region of the body tissue from a peripheral background blood flow on the basis of a plurality of blood flow map data for a time that is one or more cardiac beats, and the display section has a function that distinguishably displays each blood flow on a blood flow map. The blood flow image diagnosis device has an additional function for diagnosing blood flow images as compared to a conventional device.12-29-2011
20120004561SYSTEMS AND METHODS OF DETERMINING PATIENT PHYSIOLOGICAL PARAMETERS FROM AN IMAGING PROCEDURE - A method of determining at least one patient physiological parameter from an imaging procedure includes at least the steps of measuring time enhancement outputs for at least two different regions of interest, and determining at least one difference between the time enhancement outputs to provide a measure of the at least one patient physiological parameter. The physiological parameter can be a parameter of the cardiopulmonary system. It can also be the cardiac output, the blood volume in a region, a rate transfer term or a transit delay. A first time enhancement output may be measured in the ascending aorta or the descending aorta and a second time enhancement output may be measured in the pulmonary artery trunk.01-05-2012
20120029369Passive Microwave Assessment of Human Body Core to Surface Temperature Gradients and Basal Metabolic Rate - A passive microwave thermography apparatus uses passive microwave antennas designed for operation, for example, at WARC protected frequencies of 1.400 to 1.427 GHz and 2.690 to 2.70 GHz (for core body gradient temperature measurement) and 10.68 to 10.700 GHz or higher microwave frequency (for surface body gradient temperature measurement) and a related directional antenna or antenna array to measure microwave radiation emanating from an animal, especially, a human body. The antennae may be radially directed toward a point within or on the surface of a human body for comparison with known temperature distribution data for that point and a given ambient temperature. Each frequency band may provide a plurality of adjacent noise measuring channels for measuring microwave noise naturally emitted by the human body. The apparatus measures short-term changes in, for example, core and body surface temperatures to establish a basal metabolic rate. Changes in core body temperature may be stimulated by the administration of food or certain organic and drug-related substances or stress to induce a change in basal metabolic rate over time. These changes correlate directly with a human subject's metabolism rate at rest and under certain dietary constraints and can be used to determine courses of treatment for obesity, metabolic disease, and other disorders. The apparatus can also be used to remotely monitor patients and subjects without physical contact.02-02-2012
20120095354QUANTITATIVE IMAGING WITH MULTI-EXPOSURE SPECKLE IMAGING (MESI) - Methods and systems relating to multi-exposure laser speckle contrast imaging are provided. One such system comprises a laser light source, a light modulator, and a detector for the measurement of reflected light comprising at least one camera, at least one magnification objective, and at least one microprocessor or data acquisition unit.04-19-2012

Patent applications in class Measuring blood flow in body portion other than heart

Patent applications in all subclasses Measuring blood flow in body portion other than heart