Patents by Inventor Karl M. Sutherland

Karl M. Sutherland 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).

  • Patent number: 5061236
    Abstract: A blood reservoir device comprising a generally flexible blood collection chamber having an inlet portion and a main portion. The inlet portion is preferably sized and configured such that blood entering the inlet portion will avoid turbulence and will undergo generally laminar flow through the inlet portion, into the main portion of the chamber. A vent tube is provided for venting coalesced or collected gas bubbles from the top edge of the chamber. Additionally, one or more filter elements may be positioned within the chamber to further facilitate removal of air bubbles from blood passing through the chamber.
    Type: Grant
    Filed: July 16, 1990
    Date of Patent: October 29, 1991
    Assignee: Baxter International Inc.
    Inventors: Karl M. Sutherland, William R. Patterson
  • Patent number: 4874581
    Abstract: A blood oxygenator which independently controls the rate of oxygen and carbon dioxide exchange between an oxygen enriched gas and the blood. The oxygenator of the invention includes a gas inlet mechanism for diverting oxygen enriched gas between two different pathways. The first flow pathway feeds the oxygen bearing gas to a diffusion plate or sparger for the purpose of forming bubbles which diffuse into the blood to facilitate the exchange of oxygen and carbon dioxide between the gas and blood. The second flow pathway feeds oxygen down into the interior of the oxygenator as a substantially continuous stream which creates a substantially single gas bubble, or is simple a substantially continuous flow of gas with the oxygenator. This continuous flow of gas affects a gas exchange across the blood-gas interface, with carbon dioxide diffusing into the gas at substantially the same diffusion rate as occurs with the microbubbles diffusing into the blood, but with a lower diffusion rate for the oxygen.
    Type: Grant
    Filed: July 7, 1988
    Date of Patent: October 17, 1989
    Assignee: Baxter International Inc.
    Inventors: Karl M. Sutherland, Matthew Jenusaitia
  • Patent number: 4684508
    Abstract: An improved structure for directing the flow of blood and blood foam onto a heat exchanger in a bubble blood oxygenator is disclosed. An extended skirt extends from the plate where venous blood and oxygen are mixed to the top of the heat exchanger of the blood oxygenator. Blood and blood foam flow downwardly uniformly over the mixing plate and evenly onto the heat exchanger. Full utilization of the heat exchanger may thereby be more easily achieved.
    Type: Grant
    Filed: May 5, 1986
    Date of Patent: August 4, 1987
    Assignee: American Hospital Supply Corp.
    Inventor: Karl M. Sutherland
  • Patent number: 4490254
    Abstract: This invention relates to a blood filter assembly in which blood enters at the bottom end of the assembly, is directed in spirally upward path and then passes through a filter medium. After passing through the filter medium, the blood flows downwardly out of an outlet in the bottom end of the assembly. A gas vent is provided at the top end of the assembly. In its preferred embodiment, the outer shell of the assembly tapers from the bottom end to a narrower diameter top end, the filter medium is generally shaped in the form of a cylindrical tube and a core member is provided radially inwardly of said filter medium and spaced therefrom. This filter assembly is particularly useful for the removal of particulate matter, gas and other foreign materials from blood.
    Type: Grant
    Filed: February 25, 1980
    Date of Patent: December 25, 1984
    Assignee: Bentley Laboratories, Inc.
    Inventors: Lucas S. Gordon, Karl M. Sutherland