Abstract:
Morphological features within electrical cardiac signals are tracked and changes in features are monitored to detect renal failure. The morphological feature may be an interval between corresponding polarization events such as the interval between QRS-complexes and peaks of corresponding T-waves (QTmax interval); the interval between QRS-complexes and ends of corresponding T-waves (QTend interval); or the interval between P-waves and corresponding QRS-complexes (PR interval). The feature may also be the elevation of a cardiac signal segment between corresponding polarization events, such as QRS-complexes and corresponding T-waves (ST segment); a duration of a polarization event, such as a QRS-complex (QRS width); or an amplitude of a polarization event, such as a T-wave (T-wave amplitude). The change in the feature may comprise a decrease in QTmax intervals, a decrease in QTend intervals, a deviation in ST segment elevation, an increase in QRS width, an increase in PR interval or a deviation in T-wave amplitude.
Abstract:
A method and apparatus for monitoring a kidney that consists of monitoring the corticomedullary sodium concentration gradient in a kidney by an imaging technique selected from the group consisting of MRI, optical imaging, computed tomography (CT), ultrasound or positron emission tomography (PET), to obtain dynamic images; processing the obtained images to quantitatively determine, pixel by pixel of the images, the concentration of sodium along the corticomedullary axis of the kidney; and mapping the sodium distribution at high resolution to indicate the sodium concentration gradient of the corticomedullary axis of the kidney. Preferably the monitoring is carried out using 23Na MRI. Maps of the sodium distribution are displayed.
Abstract:
A patient hydration system with a patient urine output measurement device, a hydration fluid administration subsystem, and a controller, responsive to the patient urine output measurement device. The controller is configured to control the hydration fluid administration subsystem to administer hydration fluid to the patient to prevent dehydration of the patient. A hydration sensor is also included to detect at least one patient parameter indicative of the patient's hydration state.
Abstract:
The present invention is a technique and apparatus for acquiring anatomic information used in diagnosing and characterizing abdominal aortic aneurismal disease and the like. This technique provides anatomic information, in the form of images, using a combination of a plurality of magnetic resonance angiography sequences, including a spin-echo and four contrast enhanced (e.g., gadolinium) magnetic resonance angiography sequences. The anatomic images may be used in, for example, pre-operative, operative and post-operative evaluation of aortic pathology, including aneurysms, atherosclerosis, and occlusive disease of branch vessels such as the renal arteries. The gadolinium-enhanced magnetic resonance angiography provides sufficient anatomic detail to detect aneurysms and all relevant major branch vessel abnormalities seen at angiography operation. This technique and apparatus allows for imaging the aorta at a fraction of the cost of conventional aortography and without the risks of arterial catheterization or iodinated contrast.
Abstract:
A breath-based diagnostic device. The device includes an array of multiple gas sensors, a database storage device and a microprocessor. The gas sensors contain material capable of reacting with volatile organic chemicals in the exhaled breath of the subject. The database storage device stores established responses to a variety of disease. The microprocessor compares the response detected by the gas sensors and the database so as to perform the diagnosis.
Abstract:
The invention relates to an arrangement for a patient monitor arranged to measure one or more parameters from a patient from other than urine or the urinary tract. To improve the ergonomics of patient monitoring work, the arrangement comprises a sensor (8) that is arranged between a patient urinary tract catheter (6) and a urine collection container (7) or the like and that is arranged to measure at least the flow or volume of the patient's urine output, and means (9) for conveying the data measured to the patient monitor (2)
Abstract:
The present invention is a technique and apparatus for providing preferential enhancement of an artery of interest relative to adjacent veins and background tissue by correlating the collection of a predetermined portion of data of a magnetic resonance contrast image during the arterial phase of the magnetic resonance contrast enhancement. The arterial phase of the contrast enhancement may be described as a period of a maximum, substantially elevated, or elevated contrast concentration in the artery of interest relative to adjacent veins. The present invention includes a detection system for monitoring and detecting the arrival of the contrast agent in the artery and tissues of interest. When the concentration of contrast agent in the artery of the region of interest is maximum, substantially elevated or elevated (e.g., about 20-50% greater than the response of the region of interest to a series of magnetic resonance pulses before administration of a magnetic resonance contrast agent), a predetermined portion of the magnetic resonance image data (e.g., data which is representative of the center of k-space) may be acquired. Thus, the present invention facilitates synchronization between collecting the central portion of k-space image data with the arterial phase of contrast enhancement. The center of k-space corresponds to the lowest spatial frequency data which dominates image contrast.
Abstract:
The present invention is a technique and apparatus for acquiring anatomic information used in diagnosing and characterizing abdominal aortic aneurismal disease and the like. This technique provides anatomic information, in the form of images, using a combination of a plurality of magnetic resonance angiography sequences, including a spin-echo and four contrast enhanced (e.g., gadolinium) magnetic resonance angiography sequences. The anatomic images may be used in, for example, pre-operative, operative and post-operative evaluation of aortic pathology, including aneurysms, atherosclerosis, and occlusive disease of branch vessels such as the renal arteries. The gadolinium-enhanced magnetic resonance angiography provides sufficient anatomic detail to detect aneurysms and all relevant major branch vessel abnormalities seen at angiography operation. This technique and apparatus allows for imaging the aorta at a fraction of the cost of conventional aortography and without the risks of arterial catheterization or iodinated contrast.
Abstract:
A system for patient diagnostic testing includes the physiological data output is in a two dimensional graphical format. Optionally, the report includes imaging data. Color is a dimension provided to the graphical presentation of normal patient data in horizontal and vertical dimensions. Detrusor pressures are obtained. One detrusor pressure is the difference between average data points of the bladder and rectal pressures. The other is obtained by subtracting curve fitted rectal and bladder pressures. The displayed data is a presentation including bladder capacity information, pressure characteristics, and data as a function of volume such that bladder volume is indicated.
Abstract:
The present invention is a method and apparatus for providing preferential enhancement of an artery of interest relative to adjacent veins and background tissue. The method and apparatus adapts the timing of a maximum or substantially elevated rate of infusion to correlate with the collection of image data corresponding to the center of k-space. The technique and apparatus temporally correlates the timing of a maximum or substantially elevated rate of infusion and the mapping of k-space according to the location of the artery of interest, the size of the artery of interest, the physical condition of the patient, the time delay due to the configuration of the contrast agent delivery system, and/or the type of pulse sequence employed by the imaging apparatus. Adapting the timing of a maximum or substantially elevated rate of infusion to correlate with the collection of image data corresponding to the center of k-space provides a period of a maximum or substantially elevated contrast concentration in the artery of interest relative to adjacent veins during collection of at least a portion of the image data corresponding to the center of k-space.