Patent application number | Description | Published |
20090279277 | OPTICAL SOURCE ASSEMBLY SUITABLE FOR USE AS A SOLAR SIMULATOR AND ASSOCIATED METHODS - The optical source assembly/solar simulator comprises a light source, and a reflector for collecting the light and directing the light in a desired direction. In certain embodiments a spectral filter assembly receives the light from the reflector and blocks at least some of the light at specific wavelengths to produce filtered light. The spectral filter assembly is quickly and easily adjustable to vary the spectral spread of the light in the output beam. A homogenizer receives the filtered light and produces a homogenized beam having a substantially uniform irradiance distribution across the beam's cross-section and a substantially uniform spectral distribution across the beam's cross-section. In certain embodiments, a lens assembly images and sizes the homogenized beam at a point in space where a device to be tested can be placed. | 11-12-2009 |
20090296243 | VARIABLE SIZED OPTICAL BEAM HOMOGENIZER AND METHOD - An optical beam homogenizer having an adjustable homogenizer chamber for selectively producing different sized homogenized output beams and related methods in accordance with one or more embodiments is described herein. | 12-03-2009 |
20100175454 | PLANAR BEAM DUMP - In one embodiment, a device for capturing radiation includes: a panel defining a plurality of double wedge chambers, wherein each double wedge chamber includes a first wedge-shaped chamber that tapers into an opening for a second wedge-shaped chamber, and wherein a longitudinal axis of the first wedge-shaped chamber is not collinear with a longitudinal axis of the second wedge-shaped chamber. | 07-15-2010 |
20100271799 | Optical Source Assembly Suitable for Use as a Solar Simulator and Associated Methods - An apparatus may have a light source configured to generate light, a reflector configured to collect the light and direct the light in a desired direction, a spectral filter assembly configured to receive the light from the reflector. The spectral filter assembly may have a stationary frame and a plurality of filter elements supported by the stationary frame. Filter elements of the plurality of filter elements may simultaneously filter a desired quantity of light within wavelength band to provide a filtered output light beam. A homogenizer may be configured to receive the filtered output light beam and produce a homogenized light beam having a substantially uniform irradiance distribution across a cross-section of the homogenized light beam. | 10-28-2010 |
Patent application number | Description | Published |
20080262361 | SYSTEM AND METHOD FOR CALIBRATING CARDIAC PRESSURE MEASUREMENTS DERIVED FROM SIGNALS DETECTED BY AN IMPLANTABLE MEDICAL DEVICE - Various techniques are provided for calibrating and estimating left atrial pressure (LAP) using an implantable medical device, based on impedance, admittance or conductance parameters measured within a patient. In one example, default conversion factors are exploited for converting the measured parameters to estimates of LAP. The default conversion factors are derived from populations of patients. In another example, a correlation between individual conversion factors is exploited to allow for more efficient calibration. In yet another example, differences in thoracic fluid states are exploited during calibration. In still yet another example, a multiple stage calibration procedure is described, wherein both invasive and noninvasive calibration techniques are exploited. In a still further example, a therapy control procedure is provided, which exploits day time and night time impedance/admittance measurements. | 10-23-2008 |
20110022057 | APPARATUS AND METHODS FOR TRANSFERRING AN IMPLANTED ELONGATE BODY TO A REMOTE SITE - A transfer guidewire assembly configured to manipulate an implanted elongate body includes a flexible elongate portion, such as a guidewire, and coupler. The flexible elongate body has a proximal end and a distal end attached to the coupler. The coupler can include a catheter and/or a handle. The handle can include a screw. The coupler is configured to be removably attached to the end of an implanted elongate body, for example, by forming an interference fit with the outside diameter of the implanted body. A method for transferring an end of an implanted medical component from first site to a second site within a patient, such as a pacemaker, defibrillator, and/or sensor lead, etc., includes inserting a guidewire into the body at the first site and externalizing the guidewire at the second site. A proximal portion of the implanted component near the first site and is attached to the guidewire. The proximal portion of the implanted component is pulled through the patient's body and out the second site with the transfer guidewire assembly. | 01-27-2011 |
20110054405 | HEMOSTASIS VALVE WITH IRIS SEAL - A hemostasis valve is disclosed herein. The hemostasis valve may include an inner bushing, a rotation sleeve, an elastomeric sleeve, and a biasing element. The rotation sleeve may extend about the inner bushing and be rotationally displaceable relative to the inner bushing. The elastomeric sleeve may include a first end operably coupled to the inner bushing, a second end operably coupled to the rotation sleeve, and an iris valve portion. Rotation of the rotation sleeve relative to the inner bushing may cause the iris valve to transition from an open state to a closed state. The biasing element may act between the rotation sleeve and inner bushing to bias the iris valve towards at least one of a closed state or an open state. | 03-03-2011 |
20120035590 | SYSTEM AND METHOD FOR MANIPULATING INSERTION PATHWAYS FOR ACCESSING TARGET SITES - A method for accessing a target site in the body by transferring a guidewire from an initial insertion site on the body to a different insertion site on the body is provided. In one aspect, a method for transferring a medical device or component, such as a sensor lead, from an initial insertion site to another insertion site is also provided. A guidewire of sufficient length, pliancy and deformability to perform a transfer from one insertion site to another insertion site is provided. In one aspect, the guidewire comprises a removable core mandrel to increase rigidity, facilitate insertion and/or improve steerability. A kit or system, comprising introducers, guidewires and catheters for performing a guidewire or device transfer is also provided. | 02-09-2012 |
20120041422 | SYSTEM AND METHOD FOR MANIPULATING INSERTION PATHWAYS FOR ACCESSING TARGET SITES - A method for accessing a target site in the body by transferring a guidewire from an initial insertion site on the body to a different insertion site on the body is provided. In one aspect, a method for transferring a medical device or component, such as a sensor lead, from an initial insertion site to another insertion site is also provided. A guidewire of sufficient length, pliancy and deformability to perform a transfer from one insertion site to another insertion site is provided. In one aspect, the guidewire comprises a removable core mandrel to increase rigidity, facilitate insertion and/or improve steerability. A kit or system, comprising introducers, guidewires and catheters for performing a guidewire or device transfer is also provided. | 02-16-2012 |
20120046528 | SYSTEM AND METHOD FOR DETECTING AND TREATING CARDIOVASCULAR DISEASE - A system for detecting and treating congestive heart failure includes an implantable module, such as a pacemaker, and a patient advisory module. The system is configured to measure thoracic impedance and to provide the patient with instructions in order to improve the accuracy of the thoracic impedance measurement as well as treating symptoms of congestive heart failure. | 02-23-2012 |
20120190991 | System and Method for Detecting a Clinically-Significant Pulmonary Fluid Accumulation Using an Implantable Medical Device - Techniques are provided for detecting a clinically-significant pulmonary fluid accumulation within a patient using a pacemaker or other implantable medical device. Briefly, the device detects left atrial pressure (LAP) within the patient and tracks changes in the LAP values over time that are indicative of possible pulmonary fluid accumulation within the patient. The device determines whether the changes in LAP values are sufficiently elevated and prolonged to warrant clinical intervention using, e.g., a predictor model-based technique. If the fluid accumulation is clinically significant, the device then generates warning signals, records diagnostics, controls therapy and/or titrates diuretics. False positive detections of pulmonary edema due to transients in LAP are avoided with this technique. Pulmonary artery pressure (PAP)-based techniques are also described. | 07-26-2012 |
20140275916 | SYSTEMS AND METHODS TO DETERMINE HR, RR AND CLASSIFY CARDIAC RHYTHMS BASED ON ATRIAL IEGM AND ATRIAL PRESSURE SIGNALS - Systems, devices and methods described herein can be used to monitor and treat cardiovascular disease, and more specifically, can be used to determine heart rate (HR), determine respiration rate (RR) and classify cardiac rhythms based on atrial intracardiac electrogram (IEGM) and atrial pressure (AP) signals. The atrial IEGM and AP signals are subject to spectrum transforms to obtain an atrial IEGM frequency spectrum and an AP frequency spectrum. Based on peaks in the atrial IEGM and AP frequency spectrums measures of HR and RR are determined, and arrhythmias are detected and/or arrhythmia discrimination is performed. | 09-18-2014 |