| Patent application number | Description | Published |
|---|
| 20090112164 | SYSTEM AND METHOD FOR PROPORTIONAL MIXING AND CONTINUOUS DELIVERY OF FLUIDS - A system and method for mixing and delivering fluids such as contrast media and saline is disclosed including at least two fluid sources, a pump, a joining fluid path connecting the at least two fluid sources to an inlet to the pump, and a valve device in the fluid path upstream of the pump. The valve device includes an actuator adapted to restrict flow in at least one of respective fluid lines connecting the at least two fluid sources to the pump inlet. A patient interface device may be associated with an outlet of the pump. The valve device actuator is generally adapted to restrict the flow in at least one of the respective fluid lines such that an incremental positional change in valve device actuator position provides a substantially linear change in fluid mixture ratio of the fluids from the at least two fluid sources to the pump inlet. | 04-30-2009 |
| 20090240142 | SYSTEMS AND METHOD OF DELIVERING FLUIDS TO A PATIENT OF VARYING CONCENTRATION - A method for injection of an imaging contrast into a patient, includes: a. in a first phase, injecting a fluid having a first concentration of contrast agent for a first period of time; and b. in a second phase, injecting a fluid having a second concentration of contrast agent for a second period of time. The osmolarity of the second phase is higher than the osmolarity of the first phase. In several embodiments in which the contrast agent of the first phase is of the same composition as the contrast agent of the second phase, the second concentration can be higher than the first concentration. The first phase can, for example, precede the second phase. The method can further include: c. in a third phase, subsequent to the second phase, injecting a fluid having a third concentration of contrast agent for a third period of time. The osmolarity of the third phase is lower than the osmolarity of the second phase. In embodiments in which the composition of the contrast agent of the third phase is the same as the composition of the contrast agent of the second phase, the third concentration can be lower than the second concentration. The fluid injected in the first phase can, for example, be closer to the osmolarity of blood that the fluid injected in the second phase and can even be generally iso-osmolar to blood plasma (for example, within 20% or even 10% or less of the osmolarity of blood plasma of the patient). Likewise, the fluid injected in the third phase can be closer to the osmolarity of blood plasma that the fluid injected in the second phase and can even be generally iso-osmolar to blood. | 09-24-2009 |
| 20090316970 | IDENTIFICATION OF REGIONS OF INTEREST AND EXTRACTION OF TIME VALUE CURVES IN IMAGING PROCEDURES - A method of extracting at least one time-value curve to determine a protocol in an imaging procedure using an imaging system, includes: determining a first N-dimensional data set of pixel values of a portion of a body of the patient at a first time using the imaging system, wherein N is an integer; determining at least a second N-dimensional data set of pixel values of the portion at a second time using the imaging system; computing a predetermined number of correlated segments of the imaged portion corresponding to a predetermined number of regions of interest of the patient by computing a similarity metric of a time series of pixel values; computing the at least one time-value curve for at least one of the regions of interest; and determining a protocol for a diagnostic scan using the image system based at least in part upon data from the time value curve. | 12-24-2009 |
| 20100114064 | MITIGATION OF CONTRAST-INDUCED NEPHROPATHY - A system, includes a pressurizing mechanism to pressurize a fluid including a contrast enhancement agent for delivery to a patient; and a control system in operative connection with the pressurizing mechanism. The control system includes a system to adjust control of fluid injection based upon a measurement of renal function of the patient. | 05-06-2010 |
| 20100174183 | MULTIPLE LUMEN DIFFUSION CATHETER - A method and device for the simultaneous or sequential introduction of multiple fluids into the bloodstream including a multiple lumen catheter with corresponding multiple hole sets. By introducing a second fluid such as saline, the concentration and bolus of a first fluid, such as a contrast agent, can be controlled and optimized. | 07-08-2010 |
| 20100204572 | Devices, Systems and Methods for Determination of Parameters for a Procedure, for Estimation of Cardiopulmonary Function and for Fluid Delivery - A method of determining at least one parameter for an imaging procedure including the injection of a contrast enhancement fluid which includes a contrast enhancing agent, includes: substituting into a model discrete point data determined from at least one contrast time enhancement curve measured using an imaging system for a first region of interest resulting from injection of a bolus of the contrast enhancement fluid. In several embodiments, a sufficient number of data points can be substituted into the model to determine values for physiological variables in the model. The variables can, for example, be related to cardiopulmonary function. At least one data point from at least a second contrast time enhancement curve for a second region of interest measured using the imaging system can also substituted into the model. | 08-12-2010 |
| 20100298699 | System and Method for Proportional Mixing and Continuous Delivery of Fluids - A system and method for mixing and delivering fluids such as contrast media and saline is disclosed including at least two fluid sources, a pump, a joining fluid path connecting the at least two fluid sources to an inlet to the pump, and a valve device in the fluid path upstream of the pump. The valve device includes an actuator adapted to restrict flow in at least one of respective fluid lines connecting the at least two fluid sources to the pump inlet. A patient interface device may be associated with an outlet of the pump. The valve device actuator is generally adapted to restrict the flow in at least one of the respective fluid lines such that a positional change in valve device actuator position provides a change in fluid mixture ratio of the fluids from the at least two fluid sources to the pump inlet. | 11-25-2010 |
| 20110092828 | Fluid Delivery System, Fluid Path Set, and Pressure Isolation Mechanism with Hemodynamic Pressure Dampening Correction - The fluid delivery system includes a pressurizing device for delivering injection fluid under pressure, a low pressure fluid delivery system, and a pressure isolation mechanism. The pressure isolation mechanism includes a first lumen associated with the pressurizing device, a second lumen associated with the low pressure fluid delivery system, and a pressure isolation port. The first valve is in a normally open position permitting fluid communication between the first lumen and the second lumen and movable to a closed position when fluid pressure in the first lumen reaches a predetermined pressure level. The first valve isolates the pressure isolation port from the first lumen in the closed position. A second valve is associated with the second lumen and regulates fluid flow through the second lumen. The second valve may be a disk valve defining one or more passageways in the form of slits through the body of the disk valve. | 04-21-2011 |
