Patent application number | Description | Published |
20090026146 | Flow Control System and Method with Variable Pressure and Variable Resistance - An infusion pump and method are provided which control flow rates with variable fluid pressure and variable series flow resistance. | 01-29-2009 |
20090131863 | Volume Measurement Using Gas Laws - A system and method for measuring fluid volume and changes in fluid volume over time, using a simple, low cost architecture is described. | 05-21-2009 |
20100063765 | Flow Sensor Calibrated by Volume Changes - An infusion pump and method are provided which combine flow rate measurements calibrated by accurate volume measurements over time. | 03-11-2010 |
20110028937 | AUTOMATED FLUID FLOW CONTROL SYSTEM - A system for controlled delivery of medicinal fluid includes a fluid pathway assembly defining a fluid pathway and including means for calculating a first calculated fluid flow rate using gas laws. The fluid pathway assembly has an inline flow sensor element received within the fluid pathway movable in response to fluid flowing in the fluid pathway. A flow control device is removably attached to the fluid pathway assembly and has a sensor for sensing a position of the inline flow sensor element in the fluid pathway, the position of the inline flow sensor element being representative of a second calculated fluid flow rate. The fluid pathway assembly includes a variable flow resistor adjustable to regulate a rate of fluid flow in the fluid pathway assembly. A drive mechanism attached to the flow control device is operably coupled to the variable flow resistor when the flow control device is attached to the fluid pathway assembly. The variable flow resistor is adjustable by the drive mechanism to achieve a target flow rate when the first calculated flow rate and/or the second calculated flow rate differs from the target flow rate. | 02-03-2011 |
20110046900 | IMPULSE ANALYSIS FOR FLOW SENSOR-BASED FLUID CONTROL SYSTEM - A fluid flow control system using flow rate changes to extract additional information from an in-line flow sensor. The system provides the ability to determine a position of a movable flow sensor element of a flow sensor by illuminating a photosensitive pixel array with a light source to create a first set of pixel intensity values, introducing an abrupt change to the fluid driving pressure, illuminating the photosensitive pixel array with a light source to create a second set of pixel intensity values, and calculating the difference between the first and second sets of pixel intensity values as a function of pixel position. | 02-24-2011 |
20110119089 | System and Method for Personal Electronic Medical Records - An electronic medical record system and method enables a patient and the patient's caregivers to create, maintain, and use an electronic medical record over a secured communication network, such as the Internet. | 05-19-2011 |
20110168270 | EXTENDED RANGE FLUID FLOW RESISTOR - In one aspect, an extended range fluid flow resistor includes a housing having an inlet and an outlet and defining a fluid passageway therebetween A plunger is slidably received within the fluid passageway and an actuator is rotatably coupled to the housing and the plunger, such that rotation of the actuator causes sliding movement of the plunger within the fluid passageway The plunger has a sealing region and a variable flow region axially adjacent the sealing region Fluid flow through the fluid passageway is prevented when the sealing region is aligned with the inlet and fluid flow through the fluid passageway is permitted when the variable flow region is aligned with the inlet The variable flow region includes a helical groove extending from a first end of the variable flow region adjacent the sealing region and away from the sealing region to a second end of the vanable flow region. | 07-14-2011 |
20120041413 | PORTABLE INFUSION MANAGEMENT APPARATUS AND METHOD - A portable infusion apparatus and method are provided for controlling the delivery of medicinal fluid to a patient. | 02-16-2012 |
20140350510 | PNEUMATICALLY COUPLED DIRECT DRIVE FLUID CONTROL SYSTEM AND PROCESS - A fluid control system for delivery of a liquid includes a pneumatic drive that incorporates a linear actuator to effect known volume changes in a gas reservoir. The gas reservoir is in fluid communication with a gas-side reservoir that is separated from a fluid-side reservoir by a flexible membrane. Movement of the linear actuator effects positive or negative volume differences on the gas in the gas-side reservoir, resulting in a decrease or increase in pressure of the gas that is transmitted to the fluid-side reservoir to draw fluid, primarily liquid, in from a source or deliver liquid out to a sink. In another aspect, a mechanism is provided for the detection and elimination of air bubbles in the fluid path. | 11-27-2014 |
20140350511 | PNEUMATICALLY COUPLED FLUID CONTROL SYSTEM AND PROCESS WITH AIR DETECTION AND ELIMINATION - A fluid control system for delivery of a liquid includes a pneumatic drive that incorporates a linear actuator to effect known volume changes in a gas reservoir. The gas reservoir is in fluid communication with a gas-side reservoir that is separated from a fluid-side reservoir by a flexible membrane. Movement of the linear actuator effects positive or negative volume differences on the gas in the gas-side reservoir, resulting in a decrease or increase in pressure of the gas that is transmitted to the fluid-side reservoir to draw fluid, primarily liquid, in from a source or deliver liquid out to a sink. In another aspect, a mechanism is provided for the detection and elimination of air bubbles in the fluid path. | 11-27-2014 |