Abstract:
Positive displacement pump system for the dispensing of droplets of liquid comprises a pump with a liquid-containing chamber (337) with a movable portion (313), an actuator (321) adapted to move said movable portion of said chamber for changing the volume of said chamber, a liquid outlet (343) in fluid communication with said chamber. A dispensing valve (344) for controlling flow through said liquid outlet and control means (326) for controlling said actuator and said valve are included. The system is characterized in that said actuator is a self-locking piezo-linear actuator in which the force required to produce a unit change in linear displacement of said movable portion of said chamber is substantially independent of the position of the actuator. Preferably the linear actuator is a walking piezo-motor. The pump may preferably be a bellows pump or a syringe pump. In a method to use the device the system pressure is stabilized before dispensing a plurality of droplets.
Abstract:
A fill adapter system (2700) for an infusion pump assembly. The system includes a reusable fill adapter base, the base including a volume control mechanism (2702) to adjust an available fill volume of a reservoir of the infusion pump assembly and a pomp mechanism (2718) configured to pump air into a fluid vial. The system also includes a vial adapter assembly including a first needle configured to penetrate a septum of the fluid vial for fluidly coupling the pump mechanism to the fluid vial and a second needle having a first end configured to penetrate the septum of the fluid vial and a second end configured to penetrate a septum of the reservoir of the infusion pump assembly to allow transfer of fluid from the fluid vial to the reservoir of the infusion pump assembly in response to air being pumped into the fluid vial and a needle carriage adapted to carry the first needle and the second needle, wherein the needle carriage slidably attached to the interior of the vial adapter assembly, wherein the needle carriage adapted to slide from a vial end of the vial adapter to a receptacle end of the vial adapter.
Abstract:
An infusion pump assembly is disclosed. The infusion pump assembly includes a reservoir for receiving an infusible fluid, a pump assembly for pumping a quantity of infusible fluid from the reservoir to an exit, a first valve assembly configured to selectively isolate the pump assembly from the reservoir, a second valve assembly configured to selectively isolate the exit from the pumping assembly, and a split ring resonator antenna having a resonant frequency comprising a plurality of planar metallic layers.
Abstract:
A system for at least partial closed-loop control of a medical condition is disclosed. The system includes at least one medical fluid pump. The medical fluid pump including a sensor for determining the volume of fluid pumped by the pump. Also, at least one continuous analyte monitor, and a controller. The controller is in communication with the medical fluid pump and the at least one continuous analyte monitor. The controller includes a processor. The processor includes instructions for delivery of medical fluid based at least on data received from the at least one continuous analyte monitor.
Abstract:
This invention relates to a method and an equipment for portioning of liquid consignments of specific amounts and to the packaging of these small liquid consignments in mass production. The portioning is executed with a bellow, which lines an air space of varying volume so that the air stream caused by the bellow establishes the injection and suction of a liquid. According to the invention the air space is connected to the suction tip (4), which holds a liquid space lined by a filter permeable to air stream but impermeable to liquid; when in suction phase the liquid is sucked into the suction tip (4) by the motion of the liquid, and in the injection phase the reverse motion of the bellow is used in injecting the liquid consignment from the suction tip, and the injection of the liquid consignment of certain volume is based on a corresponding volume change in the air space of the bellow established by an equipment controlling the bellow. Serial portioning may take place so that a liquid volume of multiple times of the liquid consignments is sucked into the suction tip (4), after which the liquid consignments are portioned by the reversible motions of the bellow produced by the equipment controlling the bellow, which may be a pacemotor, for example. The suction tip may be removable, in which case the liquid to be portioned may be changed without having to clean the equipment, since the filter (17) in the suction tip prevents the contamination of the air space of the bellow.
Abstract:
A dosage dispensing cap system is configured to release a fixed amount of medication from a container as a result of a single actuation by a user. A first cap element of the system may have a first aperture and be adapted to be attached to the container, which is configured to house a multiplicity of pills of a generally uniform size, or liquid medication of a particular volume. A second cap element may be flexible, have a flange member extending generally radially outward from a diaphragm member and be disposed between the first cap element and the container. The diaphragm member may have a mouth portion, a throat portion and a cavity generally disposed therebetween. The cavity may be generally large enough to contain a fixed number of pills or a dose volume of liquid. By way of a simple actuation, the mouth portion opens and the throat portion closes, thereby allowing the cap system to release a discrete number of pills or a dose volume of liquid medication.
Abstract:
A fill adapter (3000) for filling a reservoir. The fill adapter includes a button assembly actuator (3046) and a pump chamber plunger actuator (3048) hingably attached to the button assembly actuator, wherein the actuation of the button assembly actuator actuates the pump chamber plunger actuator and wherein the pump chamber plunger actuator actuates a pump chamber membrane before the at least one button assembly (3036) avtuates said membrane.
Abstract:
An improved implantable valve accumulator pump for the delivery of medication is disclosed. The implantable pump comprises a pressurized drug reservoir. The medication metering assembly comprises a fixed volume accumulator positioned between a pair of valves. The valves alternately open and close to admit medication from the reservoir into the accumulator and to dispense a precise volume pulse to an outlet catheter. In order to improve the pump' s accuracy and to increase pumping volume while optimizing the pump's overall size and energy usage a two way diaphragm accumulator is used. The unit can be externally programmed or can be used in a fixed rate configuration that is never programmed but set at the factory or in the current programmable configuration.
Abstract:
Die Erfindung betrifft eine Verdrängerpumpe (1) einen Zylinder (1a, lb) aufweisend, in dem ein Kolben (4) mittels eines Antriebs (3, 7, 8) hin und her bewegbar ist, wobei eine Dichtung den Kolben (4) umfaßt und abdichtend an der Außenwandung des Kolbens (4) sowie an der Innenwandung des Zylinders (1a, 1b) anliegt, und die Dichtung den Zylinder in einen ersten und einen zweiten Raum (5, 6) unterteilt, wobei der mit einem Medium gefüllte erste Raum (5) mit einer Verbindungsleitung (10) in Verbindung ist, über die das Medium durch die Bewegung des Kolbens (4) aus dem Raum (5) des Zylinders herausdrückbar bzw. in diesen hineinförderbar ist, wobei die Dichtung eine Rollmembran (9, 30) ist.
Abstract:
An assay device in which to carry out a fluid-phase chemical assay, comprising means for supporting a test substrate, a sample chamber for receiving a fluid sample and at least one fluid control device for controlling the movement of fluid into and/or out of the sample chamber, wherein the fluid control device comprises a fluid outlet chamber in fluid communication with the sample chamber, and a displaceable flexible diaphragm the displacement of which alters the volume of the outlet chamber so as to allow and/or restrict fluid flow between the outlet and sample chambers. The invention also provides assay apparatus incorporating such a device, an assay station for use as part of such apparatus, a fluid control unit for use as part of the assay device and a method of conducting an assay which may involve the use of such apparatus and devices.