River Medical, Inc.

Block Medical, Inc.

Winfield Medical

Frederic P Field

Gregory E Sancoff

Mark Christopher Doyle

Steven R Payne

James M Verespej

A device is disclosed which provides for direct incorporation of a substance from a separate container, such as a drug vial, into the contents of a liquid delivery device, which has a connecter to provide communication between the device and the container, and means for closing the connection prior to dispensing the contents of the device. A method for permitting a substance in a container to be transferred to a liquid delivery device, and contents of the device to be administered to a patient is also disclosed.

Vial adaptor for a liquid delivery device

The present invention relates to apparatus and method for the controlled delivery of fluid. The apparatus comprises chemical reactants which combine to generate gas and create pressure to drive a fluid from a container. The reactants and the environment in which the reaction occurs are controlled, thereby causing the fluid to be delivered from the device at a predetermined flow rate.

Apparatus for the generation of gas pressure for controlled fluid

The present invention relates to chemical reactants, compositions, methods to manufacture reactants, and apparatus for the generation of a gas pressure to drive a fluid from an infusion pump at controlled flow rates.

Method for generating gas to deliver liquid from a container

We disclose apparatus and methods for delivering for patient infusion or other use two or more fluids either sequentially or simultaneously. The apparatus has a fluid delivery compartment containing a first infusion fluid, a flexible membrane, and an openable bag containing a second infusion fluid. An attached gas reaction compartment contains chemical reactants which, when combined, react to evolve gas. The gas expands a gas expansion chamber causing the membrane to move into the fluid delivery compartment, displacing the first infusion fluid. The membrane eventually contacts and compresses the openable bag. Pressure from the membrane causes the bag to open and discharge its contents out of the infusion device.

Apparatus and methods for multiple fluid infusion

A liquid dispensing device and the method of dispensing liquid are disclosed. The device includes a hollow gas- and liquid-tight casing, a flexible gas- and liquid-tight membrane having multiple convolutions disposed across the casing interior and dividing the interior into a propellant chamber and a liquid chamber, an outlet port from the liquid chamber. A pressure relief valve, suitable for use with the device, allows gas to escape from the device when the gas pressure exceeds a predetermined level.

Liquid delivery device

A liquid dispensing device and the method of dispensing liquid are disclosed. The device is uniquely suited to meet the requirements of hospitals and other institutions for long shelf life in inert condition and ready activation when needed. The device includes a hollow gas- and liquid-tight casing (preferably spherical or cylindrical), a flexible gas- and liquid-tight membrane disposed entirely across the casing interior dividing the interior into a propellant chamber and a liquid chamber; an outlet port from the liquid chamber; two mutually reactive chemicals in the propellant chamber but separated by a barrier; and a member to breach the barrier and permit the chemicals to come into contact; the two chemicals being reactive upon contact to form a propellant gas. The propellant gas thereupon expands against the membrane, moves the membrane to enlarge the propellant chamber, decrease the liquid chamber, and expel the contained liquid from the liquid chamber through the outlet port. The barrier may be breached in any convenient manner, as by breaking a frangible barrier or perforating a perforable one. Preferably at least one of the chemicals is in liquid form, and one is a Group I or II metal carbonate or bicarbonate while the other is an acid, acid anhydride or acid salt; the most preferred combination is sodium carbonate and citric acid.

Infusion pump

An apparatus for dispensing a fluid, comprising a container for holding the fluid to be dispensed and a housing for holding a solid chemical and a liquid chemical which react to generate carbon dioxide gas upon contact, such that the gas is used to drive the fluid out of the container.

Gas delivery apparatus for infusion

A device is disclosed which provides direct and effective incorporation of material (such as medicine) from a separate container into the contents of a liquid dispensing device. The device has a hollow sleeve extending outwardly, an openable closure, a securing member which engages a mating member on the container, and a conduit (such as a needle) to provide fluid communication between the device and the container, with the fluid communication occurring upon attachment of the container to the device. The device can also provide for attaching the separate container to the dispensing device but without initially establishing liquid communication between the two.

Liquid delivery device having a vial attachment or adapter incorporated

An infusion system for the delivery of a first continuous flow of a intravenous fluid and second multiple selectable dosages of the fluid from a source to a site comprises a source of intravenous fluid under pressure, a housing having an inlet for connection to the source of fluid and an outlet for connection to a delivery site, a first passage in the housing for conveying a continuous constant low volume of the fluid to the outlet, and a second passage in the housing having an accumulator for accumulating a predetermined fixed charge of fluid and an actuator for selectively releasing the flow of the fluid from the accumulator to the outlet.

Patient controlled bolus dosage infuser

A liquid infusor apparatus includes an elastic sleeve mounted on an elongated member and within a spherical housing to enable it to expand naturally to maintain a constant pressure over the infusion period. An alternate embodiment includes a holding reservoir that may be pre-filled, and a pressure reservoir that is loaded from the holding reservoir preparatory to infusion.

Infusion apparatus

Inflatable medical infusor

A liquid infuser apparatus includes an elastic sleeve mounted on an elongated member and within a spherical housing to enable it to expand naturally to maintain a constant pressure over the infusion period. An alternate embodiment includes a holding reservoir that may be pre-filled, and a pressure reservoir that is loaded from the holding reservoir preparatory to infusion.

Growing community of inventors

Solana Beach, CA, United States of America

Frederic P Field