Baxter International Inc.

Baxter Healthcare Sa

Other

Imed Corporation

Oscar E Hyman

David Norman White

Larry L Wilson

Ahmad-Maher Moubayed

John W Stevenson

Linda Thomas

Jay G Moubayed

Robert L Jones

Ahmad Maher Moubayed

Jon A Jenkins

Ahmadmahir M Moubayd

Orris H Flatten

Ahamd-Maher Moubayed

Programmable infusion systems and method for controlled infusion of diagnostic or therapeutic substances (e.g., drugs, biologics, fluids, cell preparations, etc.) into the bodies of human or animal subjects.

Method and system for controlled infusion of therapeutic substances

A curvilinear peristaltic pump for facilitating the pumping of a liquid through a length of resilient tubing. The pump comprises a housing having a platen member attached thereto and a rotatable cam disposed therewithin. Also disposed within the housing is a drive unit of the pump which is mechanically coupled to the cam such that the activation of the drive unit results in the concurrent rotation of the cam in a first direction and the deactivation of the drive unit maintains the cam in a set position. Movably attached to the housing are a plurality of pump fingers of the pump, each of which has a first end which is cooperatively engaged to the cam and a second end which is disposed in spaced relation to the platen member. The cam is configured to sequentially move the pump fingers radially outwardly toward and inwardly away from the platen member when rotated in the first direction by the drive unit. A portion of the tubing may be extended between the platen member and the second ends of the pump fingers such that the sequential movement of the pump fingers toward and away from the platen member results in liquid within the tubing being pumped in the first direction of rotation of the cam. The pump is used in conjunction with a disposable tubing assembly which is provided with a shut-off valve to selectively obstruct the flow of liquid through the tubing assembly.

Curvilinear peristaltic pump

Curvilinear peristaltic pump having insertable tubing assembly

A linear peristaltic pump for pumping fluid through a resilient tube has a pair of pumping fingers, a pair of pinching fingers, and a strain gauge to monitor pressure inside the tube. The first pumping finger squeezes the tube at a first location, and the second pumping finger squeezes the tube at a second location. Additionally, the first pumping finger is configured and operated to displace approximately twice the fluid volume displaced by the second pumping finger. The first pinching finger occludes the tube upstream to the first pumping finger and the second pinching finger occludes the tube between the first and second pumping fingers. To monitor dimensional changes in the outer diameter of the tube and thereby indicate pressure inside the tube, the strain gauge is mounted on the pump between the second pinching finger and first pumping fingers. Finally, a leaf spring and photoelectric sensor are associated with the first pumping finger to indicate when the finger is in its fully withdrawn position.

Two-cycle peristaltic pump with occlusion detector

An automatic air-in-line detector for either a transparent or an opaque fluid including first detector means for detecting air-in-line in the transparent fluid and second detector means for detecting air-in-line in the opaque fluid, and additionally including control means coupled to the first and second detector means and automatically responsive to the difference between the transparent fluid and the opaque fluid for enabling the first detector means in response to the transparent fluid and for enabling the second detector means in response to the opaque fluid and with an alarm in accordance with the detection of air-in-line in either the transparent or opaque fluid. If any of the detectors fail, the system either automatically alarms or becomes more sensitive. If the control means fail, the system automatically alarms.

Automatic air-in-line fluid detector

A volumetric infusion pump for intravenous administration of fluid to a patient, including a volumetric cassette for receiving fluid from an IV fluid container and for pumping such fluid at a controlled rate using an IV administration set until a predetermined volume of fluid has been infused into the patient. The volumetric cassette contains, when filled, a predetermined volume of fluid. The cassette, when coupled to a driving mechanism in the pump, provides for the fluid to be pumped from the cassette at a predetermined rate. Once the cassette chamber has been at least partially emptied a predetermined amount by the operation of the pump, the volumetric chamber of the cassette is rapidly filled and the pumping continues with such emptying and filling of the cassette chamber alternately occurring until the predetermined volume of fluid has been pumped. The cassette is of a syringe type having a chamber and a plunger piston and the stroke of the plunger is controlled by the driving mechanism of the pump. A plurality of alarm mechanisms provide safety in the operation of the pump and provide output indications to give the operator a diagnosis of the reason that the pump has been alarmed. These alarms include air-in-line, low battery, occlusion of the line, and infusion complete.

IV pump

Growing community of inventors

Poulsbo, WA, United States of America

Oscar E Hyman