Baxter International Inc.

Baxter Healthcare Sa

Imed Corporation

Centaur Sciences, Inc.

Other

Larry L Wilson

Oscar E Hyman

David Norman White

Ahmad-Maher Moubayed

John W Stevenson

Linda Thomas

Jay G Moubayed

Jon A Jenkins

Clinton Deckert

Tuan Bui

Alan E Jordan

Raymond E Cannon

Clinton L Deckert

Ahmadmahir M Moubayd

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 medical treatment administration system for delivering a medical treatment to a patient . The system has a medical device disposed in a first location, an electronic processor coupled to the medical device , a sensor coupled to the processor , and a remote controller disposed at a second location remote from the first location. The remote controller has an input device to control operation of the electronic processor . The sensor receives one or more signals which it transfers to the processor . The signals can be derived from the patient's physiological condition and/or the environment of the patient. The processor receives the signals and performs a calculation of the signal. Based on the result of the calculation, the processor regulates the distribution of medical treatment to the patient over a period of time.

Medical apparatus with remote control

An infusion apparatus for infusing liquid into a patient over an infusion period beginning with an initial infusion and ending with a final infusion and during which infusion period all relevant infusion data is stored in a non-volatile memory to generate a complete historical record of the infusions administered during the infusion period. The infusion apparatus is provided with a housing, a pump disposed in the housing and adapted to pump liquid through a conduit, and a controller operatively coupled to the pump to cause the pump to deliver a plurality of infusions of liquid medicant during the infusion period, each of the infusions being made at a time and a flow rate. The infusion data stored in the non-volatile memory may include programmed infusion data input to the infusion pump during programming of the pump, the programmed data including data representing the infusion mode, the infusion flow rate, the volume to be infused, and the infusion start time. The infusion data may also include data representing the time at which each infusion was made during the infusion period and the flow rate at which of each infusion was made. The automatic recording of the infusion data during the programming and operation of the infusion apparatus will generate a complete historical data record, which is advantageous in that the data record can be later retrieved from the non-volatile memory and used for various purposes, including clinical purposes to aid in determining how effective a particular infusion therapy was and treatment purposes to confirm that the prescribed infusion was actually delivered to the patient.

Medical apparatus with patient data recording

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

A dual controller for an IV infusion system comprises a microprocessor to concurrently control the rate of infusion through two IV units. The control of the rate of infusion is provided by a stepper motor driven regulator which is selectively positionable for compressibly engaging the IV tubing. A flow sensor employs a case of infrared transparent material which mounts to a drip chamber of the infusion unit. The flow sensor provides an output pulse to the microprocessor in response to a drop of fluid in the drip chamber interrupting a light path extending from an array of light emitting diodes and a photo transistor. The light emitting diodes are pulsed between energized and non-energized states so that changes in the ambient light level do not adversely effect the sensed drop rate.

Flow control system

Apparatus controls the rate of passage of fluid drops through a drip controller in accordance with a preset rate. When the rate of passage of the fluid drops is less than the preset rate, a stepper motor is incrementally operated at progressive instants of time to open the drip chamber until the measured rate is equal to the preset rate. When the rate of passage of the fluid drops is greater than the preset rate, the stepper motor is operated instantaneously to close the passage through a number of increments corresponding to the difference in the measured and preset rates. An alarm is energized when the stepper motor is positioned to provide for a maximum flow of fluid and the rate is still below the preset rate. An alarm is also energized when the passage is closed and the preset rate indicates a desired flow of fluid. An emergency motor is also provided to control the opening in the passage. Before the operation of the apparatus is instituted, the stepper motor is operated to close the drip chamber. The emergency motor is then operated to open the drip chamber and thereafter close the drip chamber. The emergency motor may thereafter be operated to close the passage when the drop controller fails to meet certain standards.

Drop controller

A rate meter senses successive drops of fluid flowing through a conduit and produces gating periods with time durations corresponding to the period of time between such successive drops. The rate meter then determines the number of incremental time periods in each gating period. The rate meter generates the reciprocal of this determination to obtain an indication of the rate of fluid flow. The rate meter may be self-contained. It includes a housing having a vertically disposed channel constructed to retain the conduit and a horizontally disposed channel communicating with the vertically disposed channel. The horizontally disposed channel is constructed to receive a cross bar made from a resilient material and fixedly disposed on the conduit. The cross bar supports the rate meter in a freestanding relationship. The cross bar may be provided with slots near its ends to enhance its resiliency. The cross bar may also be provided with detents at its ends to cooperate with detents at the ends of the horizontally disposed channel on the rate meter to retain the rate meter on the cross bar. The vertically disposed channel in the rate meter may be defined by first and second oppositely disposed walls in the housing. A light source may be disposed in the first wall and a light sensor may be disposed in the second wall. Visual indicating means may be disposed on a front wall of the housing to provide a numerical indication of the rate of fluid flow.

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Poway, CA, United States of America

Larry L Wilson