Patents Represented by Attorney Paul C. Flattery
  • Patent number: 5431634
    Abstract: A pump 10 for delivering a precise selected output volume has a rigid pump housing 12. A diaphragm 16 is in fluid right abutment with the pump housing 12 to define a pump chamber 40 therebetween. The diaphragm 16 is resiliently biased towed a selected metering position 46 wherein the diaphragm 16 assumes a cup-shaped configuration and the pump chamber 40 has a selected metering volume. The diaphragm 16 is drivable to a discharged position 52 wherein the pump chamber 40 has a selected discharge volume less than the metering volume by a selected output volume. The diaphragm 16 maintains the output volume substantially constant notwithstanding substantial variations in fluid pressure from the fluid supply of variations in ambient pressure. An inlet 32 selectively allows fluid to flow between a fluid supply 45 and the pump chamber 40 as the diaphragm 16 moves from the discharged position 52 to the metering position 46.
    Type: Grant
    Filed: June 28, 1993
    Date of Patent: July 11, 1995
    Assignee: Baxter International Inc.
    Inventor: Jeffrey O. Brown
  • Patent number: 5429614
    Abstract: An improved drug delivery system and method for reconstituting drugs are provided. The system allows the delivery of a medicament from a drug vial (40) directly into an intravenous line to a patient. The system provides a method and an apparatus that insures that the drug vial (40) is properly pierced and the vial (40) is locked into an activated position when it is desired to use the same. To this end, a vial retaining member (50) for coupling the vial (40) to a cartridge (12) including a cannula (22) is provided. The retaining member (50) includes a cannula centering member extending from an end thereof.
    Type: Grant
    Filed: June 30, 1993
    Date of Patent: July 4, 1995
    Assignee: Baxter International Inc.
    Inventors: Thomas A. Fowles, Richard A. Rollins, Mark A. Hoekwater
  • Patent number: 5427695
    Abstract: Systems and methods resuspend cellular-rich concentrates of blood by rocking the separation chamber to create variable agitation forces within the separation chamber. The systems and methods also add resuspension fluids to aid the resuspension.
    Type: Grant
    Filed: July 26, 1993
    Date of Patent: June 27, 1995
    Assignee: Baxter International Inc.
    Inventor: Richard I. Brown
  • Patent number: 5423753
    Abstract: An adapter for interconnecting in fluid communication a first connection site and a beneficial agent container having a closure. The adapter includes a plate having first and second connection site sides. A wall extends from the plate from the second connection site side and constructed to surround only the closure. This allows containers having varying sized bodies to be received. A cannula structure is rigidly secured in the plate and defines a flow path extending through the plate. The adapter can be provided in an assembly with the beneficial agent contained or in a drug delivery system.
    Type: Grant
    Filed: June 16, 1994
    Date of Patent: June 13, 1995
    Assignee: Baxter International Inc.
    Inventors: Thomas A. Fowles, Nick Fotis, Charles Eller, Brian J. Gorman, Mark A. Hoekwater
  • Patent number: 5413118
    Abstract: A drape is described which includes a three dimensional system for covering appendages of a patient. The drape includes a top sheet which forms a first, generally horizontal plane when draped over a patient. The drape further includes an apron which is attached to the top sheet and forms second and third, generally vertical planes.
    Type: Grant
    Filed: August 20, 1990
    Date of Patent: May 9, 1995
    Assignee: Baxter International Inc.
    Inventor: Joseph F. Thompson
  • Patent number: 5411499
    Abstract: A cannula assembly adapted to pierce a solid or unslit closure is disclosed and includes a blunt cannula and a piercing member held in cooperation with or contained within the flow channel of the cannula. Generally, the piercing member includes a tip capable of piercing an unslit stopper or closure and a means to temporarily retain the piercing member from the cannula and prevent inadvertent disengagement of the piercing member from the blunt cannula.
    Type: Grant
    Filed: July 30, 1991
    Date of Patent: May 2, 1995
    Assignee: Baxter International Inc.
    Inventors: Thomas E. Dudar, Peter L. Graham, Steven C. Jepson
  • Patent number: 5399171
    Abstract: The present invention provides an improved, low cost method and apparatus for monitoring the intravenous metering of fluids to a patient. The present invention provides a strain gauge which is preferably a balanced metal beam. Conditioning circuitry is provided which has as input the strain gauge output. The output of the conditioning circuit is inputted into occlusion sensing circuit. The output of occlusion sensing circuit is inputted into an air sensing circuit. The output of both the occlusion sensing circuit and the air sensing circuit are inputted into an analog to digital convertor which is monitored by a microprocessor for abnormal signals.
    Type: Grant
    Filed: April 1, 1993
    Date of Patent: March 21, 1995
    Assignee: Baxter International Inc.
    Inventors: George A. Bowman, Leonard F. Goloski, Sr.
  • Patent number: 5385253
    Abstract: A closure for a tubular administration port is formed by inner and outer members having upper ends joined together in sealing relationship. The inner member has a sealed bottom end and is configured to fit within the administration port. The outer member is configured to engage about an exterior of the tubular port. The inner member includes radially outwardly extending ribs that engage against the interior of the administration port in an interference fit relationship.
    Type: Grant
    Filed: September 2, 1992
    Date of Patent: January 31, 1995
    Assignee: Baxter International Inc.
    Inventors: Michael W. Scharf, Joseph N. Veillon, Jr., Thomas Yatsko
  • Patent number: 5385547
    Abstract: A drug delivery device is provided for coupling a first container including a beneficial agent to a second member. In an embodiment, the device includes a substantially hollow member having a cannula mounted within a wall that divides the substantially hollow member into a first and second section. The first section includes means for receiving at least a portion of a first container. The substantially hollow member includes a wall that defines an exterior of the first section that is substantially flexible. A number of different cannula and flow path structures within the hollow member are possible pursuant to the present invention.
    Type: Grant
    Filed: November 19, 1992
    Date of Patent: January 31, 1995
    Assignee: Baxter International Inc.
    Inventors: Joseph Wong, Ray W. Wood, James McShane
  • Patent number: 5382526
    Abstract: A blood bag comprises a plastic polyvinyl chloride formulation in which the polyvinyl chloride formulation contains from 5 to 30 percent by weight of a first plasticizer material which is essentially nonextractable by blood plasma stored in the bag up to 35 days at about 4.degree. C.; and from 10 to 25 percent by weight of a second plasticizer which is significantly extracted by blood plasma stored in the bag up to 35 days at about 4.degree. C.
    Type: Grant
    Filed: March 17, 1989
    Date of Patent: January 17, 1995
    Assignee: Baxter International Inc.
    Inventors: Henry M. Gajewski, Barry H. Vernick, Paul E. Measells, Jan W. Garber
  • Patent number: 5382244
    Abstract: A stand-alone control module for use in closed-wound drainage systems is described. The control module transforms a variable high-vacuum source into a constant low-vacuum source. The control module also provides a one-way check valve to prevent return of air to a patient when draining such air from the pleural cavity of the patient. The control module is a water-based control module. It includes a first-suction control chamber for transforming a variable high-vacuum into a constant low-vacuum. The first chamber contains a first column of fluid at a first pre-determined level. The module also includes a second water seal chamber that contains a second column of fluid at a second pre-determined level. The height of the second column of fluid is less than the height of the first column of fluid. Tubes are placed in each chamber that have one end of each tube located below the columns of fluid.
    Type: Grant
    Filed: February 25, 1991
    Date of Patent: January 17, 1995
    Assignee: Baxter International Inc.
    Inventor: Anil M. Telang
  • Patent number: 5372143
    Abstract: A blood sampling system including a sampling device located in line is provided. The sampling device provides an access port that allows undiluted blood to be sampled automatically by insertion of a luer. The sampling device can have a number of different structures, for example, a swing valve, a ball valve, or a breakable seal for normally closing the sample port until a nozzle of the luer blood collector is forcibly inserted into the sample port.
    Type: Grant
    Filed: November 20, 1992
    Date of Patent: December 13, 1994
    Assignee: Baxter International Inc.
    Inventors: J. C. Bernes, J. Debrauwere, M. Joie, B. Van Breedam, J. M. Mathias
  • Patent number: 5372784
    Abstract: A multi-layer blood culture sensor includes two matrices. The first matrix is a polymer that is permeable to carbon dioxide and water, but impermeable to protons. A pH sensitive absorbance based dye is encapsulated or isolated in the polymer. The second matrix is a polymer with a pH insensitive fluorescent dye encapsulated or isolated in the polymer. The matrices are spectrally coupled and are useful for the determination of microorganisms in a blood culture bottle.
    Type: Grant
    Filed: March 11, 1994
    Date of Patent: December 13, 1994
    Assignee: Baxter Diagnostics Inc.
    Inventors: Roger J. Morris, Shoshana Bascomb, Carolyn S. Olson, Jamie Bobolis, David Sherman
  • Patent number: 5370802
    Abstract: Systems and methods for separating a suspension of plasma and platelets from whole blood rotate a chamber about an axis to create within the chamber a low-G zone radially close to the axis and a high-G zone spaced radially further from the axis than the low-G zone. The systems and methods introduce whole blood into an inlet region of the chamber to initiate separation of red blood cells toward the high-G zone of the inlet region. This creates a strong flow of plasma that moves radially toward the low-G zone of the inlet region and elutes platelets into suspension with it. The systems and methods direct the radial flow of plasma and eluted platelets within the inlet region to a port in the inlet region for transport out of the chamber. The systems and methods also drag the interface into this radial plasma flow, eluting even the largest of platelets into suspension for collection.
    Type: Grant
    Filed: October 22, 1992
    Date of Patent: December 6, 1994
    Assignee: Baxter International Inc.
    Inventor: Richard I. Brown
  • Patent number: 5362291
    Abstract: A drawer-mounted centrifuge provides easy access for loading and unloading disposable processing elements. The centrifuge also includes an umbilicus holder that moves between an operating position and an out-of-the-way position as the drawer opens and closes.
    Type: Grant
    Filed: February 9, 1994
    Date of Patent: November 8, 1994
    Assignee: Baxter International Inc.
    Inventor: Warren P. Williamson, IV
  • Patent number: 5360542
    Abstract: A centrifuge provides simplify access to the processing chamber. In one arrangement, the processing chamber separates into a bowl and spool element to receive a disposable processing bag. In another arrangement, the processing chamber pivots between an operating position and an access position to provide improved access. The centrifuge also employs readily accessible holders for releasably retaining tubing that, in use, conveys fluid to and from the chamber. Though greatly accessible, the centrifuge operates without the need of complicated rotating seals and expensive disposable components.
    Type: Grant
    Filed: November 2, 1993
    Date of Patent: November 1, 1994
    Assignee: Baxter International Inc.
    Inventors: Warren P. Williamson, IV, Richard I. Brown
  • Patent number: 5356380
    Abstract: A drug delivery device is provided comprising a cartridge body including an upper portion defining a vial receiving area and terminating in a wall, the cartridge body including a cannula extending from the wall. A vial including a beneficial agent is coupled by a retaining member to the cartridge body in an inactivated position. The retaining member allows the vial to move to an activated position. The retaining member including an outer member and an inner member, the inner member separating from portions of the outer member as the vial moves from the inactivated position to the activated position.
    Type: Grant
    Filed: October 23, 1991
    Date of Patent: October 18, 1994
    Assignee: Baxter International Inc.
    Inventors: Mark Hoekwater, Jeffrey S. Nordquist, Thomas A. Fowles, James Sertic, Brian J. Gorman
  • Patent number: 5352963
    Abstract: An improved control system for a stepper motor coil includes a flyback circuit that dissipates coil energy slowly while the coil is energized and operated in the chopping mode, while dissipating coil energy rapidly when the coil is switched to its de-energized phase.
    Type: Grant
    Filed: October 31, 1991
    Date of Patent: October 4, 1994
    Assignee: Baxter Diagnostics Inc.
    Inventors: Steven A. Garand, Carl P. Daniel
  • Patent number: D351230
    Type: Grant
    Filed: June 30, 1992
    Date of Patent: October 4, 1994
    Assignee: Baxter International Inc.
    Inventors: Irina A. Rakin, Steven K. Neuenfeldt, Birendra K. Lal, Joseph B. Loria
  • Patent number: D361616
    Type: Grant
    Filed: November 5, 1993
    Date of Patent: August 22, 1995
    Assignee: Baxter International Inc.
    Inventor: Tsuyoshi Tsuji