Patents by Inventor Steven J. Orwig

Steven J. Orwig has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220347362
    Abstract: The device of the present invention includes a dual chamber gas exchanger that is configured for increased flexibility and scalability for many clinical applications. The dual chamber oxygenator can be configured and used in various applications, such as in a heart-lung machine for cardiopulmonary support during cardiothoracic surgery, in an extracorporeal membrane oxygenation (ECMO) circuitry, as a respiratory assist device for patients with lung failure, and the like. The dual chamber gas exchanger features two sweep gas flow paths and two gas exchange membrane bundles enclosed in a housing structure with various blood flow distribution and gas distribution mechanisms. The gas exchanger includes an outer housing, an intermediate housing, two gas exchange fiber bundles, a blood inlet, a blood outlet, two gas inlets, two gas outlets, two gas distribution chambers and an optional heat exchanger.
    Type: Application
    Filed: July 7, 2022
    Publication date: November 3, 2022
    Inventors: Zhongjun WU, Bartley P. GRIFFITH, Jiafeng ZHANG, Steven J. ORWIG
  • Patent number: 11433168
    Abstract: The device of the present invention includes a dual chamber gas exchanger that is configured for increased flexibility and scalability for many clinical applications. The dual chamber oxygenator can be configured and used in various applications, such as in a heart-lung machine for cardiopulmonary support during cardiothoracic surgery, in an extracorporeal membrane oxygenation (ECMO) circuitry, as a respiratory assist device for patients with lung failure, and the like. The dual chamber gas exchanger features two sweep gas flow paths and two gas exchange membrane bundles enclosed in a housing structure with various blood flow distribution and gas distribution mechanisms. The gas exchanger includes an outer housing, an intermediate housing, two gas exchange fiber bundles, a blood inlet, a blood outlet, two gas inlets, two gas outlets, two gas distribution chambers and an optional heat exchanger.
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: September 6, 2022
    Assignees: UNIVERSITY OF MARYLAND, BALTIMORE, BREETHE, INC.
    Inventors: Zhongjun Wu, Bartley P. Griffith, Jiafeng Zhang, Steven J. Orwig
  • Publication number: 20200206404
    Abstract: The device of the present invention includes a dual chamber gas exchanger that is configured for increased flexibility and scalability for many clinical applications. The dual chamber oxygenator can be configured and used in various applications, such as in a heart-lung machine for cardiopulmonary support during cardiothoracic surgery, in an extracorporeal membrane oxygenation (ECMO) circuitry, as a respiratory assist device for patients with lung failure, and the like. The dual chamber gas exchanger features two sweep gas flow paths and two gas exchange membrane bundles enclosed in a housing structure with various blood flow distribution and gas distribution mechanisms. The gas exchanger includes an outer housing, an intermediate housing, two gas exchange fiber bundles, a blood inlet, a blood outlet, two gas inlets, two gas outlets, two gas distribution chambers and an optional heat exchanger.
    Type: Application
    Filed: February 14, 2020
    Publication date: July 2, 2020
    Inventors: Zhongjun WU, Bartley P. GRIFFITH, Jiafeng ZHANG, Steven J. ORWIG
  • Publication number: 20080045912
    Abstract: A safety overflow trap for a medical suction system to withdraw liquids from a patient. The trap protects a vacuum regulator and other downstream components from contacting the liquid withdrawn from the patient. The trap has an inlet and an outlet and a reservoir intermediate thereto. A valve is provided between the reservoir and the outlet comprising a fixed member and a movable member. The movable member floats on the liquid accumulated in the reservoir and, as that liquid rises, the movable member rises to seal against the fixed member to occlude the source of vacuum. The fixed and movable members become latched together when the movable member enters the closed position to prevent the leakage of the liquid if the trap is inadvertently tipped over. A system is also present to provide a visual alert to the attending personnel when the movable member has moved to its closed position.
    Type: Application
    Filed: August 18, 2006
    Publication date: February 21, 2008
    Inventors: Steven J. Orwig, Kevin S. Bailey, Ngee J. Lee