Fluidnet Corporation

Turnpoint Medical Devices, Inc.

Pneuma Systems Corporation

Other

Ivenix, Inc.

Newiv Medical Corp.

Jeffrey Alan Carlisle

Lawrence M Kuba

John M Kirkman, Jr

Benjamin G Powers

Douglas E Vincent

Charles E Kramer

Timothy S Schroeder

Thomas C Plummer

Brent Nibarger

John M Kirkman

A system includes a drip chamber. The drip chamber has a proximal end coupled with a drug container and a distal end coupled with fluidic tubing. The drip chamber has a proximal check valve configured to prevent fluid flow in a proximal direction and to allow fluid flow in a distal direction when a cracking pressure threshold is overcome. The drip chamber also includes a distal check valve configured to prevent fluid flow in the proximal direction and to allow fluid flow in the distal direction when a cracking pressure threshold is overcome. The cracking pressure threshold of the proximal check valve and the cracking pressure threshold of the distal check valve in combination is greater than or equal to 1 PSId. The system also includes a pneumatic port between the check valves that is configured to pneumatically couple with a pneumatic feedback control system.

Simplified pneumatic volumetric pump using IV drip chamber

A system for precision liquid delivery includes a gas reservoir having a known volume. The system has a tightly load-coupled pneumatic driver (a 'TLCP driver') that is configured to receive input power to cause the TLCP driver to move gas into the gas reservoir to produce a gas drive pressure. A valve is configured to couple the gas reservoir with a fluid reservoir having an unknown volume. The valve is further configured to selectively isolate or pneumatically couple pressures in the gas reservoir and the fluid reservoir. A gas-fluid interface couples pressure in the fluid reservoir to pressure in a fluid path. The fluid path is configured so that the fluid drive pressure driving the liquid in the fluid path is substantially the same as the fluid reservoir pressure. The system also has a pressure sensor configured to detect pressure in the gas reservoir and/or the fluid reservoir.

Airflow-based volumetric pump

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.

Pneumatically coupled fluid control system and process with air detection and elimination

Pneumatically coupled direct drive fluid control system and process

A portable infusion apparatus and method are provided for controlling the delivery of medicinal fluid to a patient. A fluid delivery system receives control input to control a setting of a variable fluid flow resistor. The variable fluid flow resistor resists passage of fluid through a fluid pathway between a fluid source and a recipient. The fluid delivery system; produces a control signal indicative of the setting of the variable fluid flow resistor; derives a fluid flow rate value from the control signal; and applies pressure to the fluid source to deliver the fluid from the fluid source to the recipient through the variable fluid flow resistor at a rate as specified by the derived fluid flow rate value.

Portable infusion management apparatus and method

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.

Impulse analysis for flow sensor-based fluid control system

A method and apparatus are disclosed for using an acceleration of a flow control system to determine the density of a fluid relative to the density of an in-line flow object.

Density analysis for flow sensor-based fluid control system

A fluid flow control system using flow rates 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.

An infusion pump and method are provided which control flow rates with variable fluid pressure and variable series flow resistance.

Flow control system and method with variable pressure and variable resistance

A device for control of fluid flow with closed loop quasi static adjustment of in-line pressure-based resistance. The disclosed device and methods of using the device provide for the ability to control a flow rate with a highly portable device; the ability for an operator to safely use the device with minimal training; the ability to automatically switch between a primary and secondary fluid; the ability to maintain a flow rate through a tubing set even when the control device is removed; and the ability to measure fluids introduced with a manual bolus injection.

Automated fluid flow control system

An infusion regulation system for regulating, monitoring, and control of the intravenous infusion of fluids into an animate body. A delivery tube receives and diverges from a fluid supply inlet tube and converges to deliver fluid to an outlet tube to the cannula. A transverse, intermediately positioned volume control tube having a movable control member therein is ported to said divaricated delivery tube. Regulated valve members operate in diagonally paired tandem fashion to control and restrict the flow through the system in an alternating and traverse course. Means for monitoring instantaneous flow through the tubing network allow resistance/pressure changes to be noted and acted upon, either with clinical alarms or through servo mechanisms. Means for selectively increasing the infusate driving pressure allow servo controlled high pressure infusions as well as low pressure, gravity driven infusions.

Growing community of inventors

Stratham, NH, United States of America

Jeffrey Alan Carlisle