Patents by Inventor Phillip D. Messinger

Phillip D. Messinger 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).

  • Method and apparatus for sampling blood and for monitoring blood pressure
    Patent number: 5148811
    Abstract: A source of saline solution under pressure is connected through tubing to a catheter inserted in a patient's blood vessel. A waste collection bag is connected to the tubing through a stopcock which permits the selective connecting of the catheter to the waste collection bag or the bag of saline solution. The sampling site is in the tubing between the catheter and the stopcock. Normally, saline solution flows into the patient's blood vessel. When a sample is to be taken, the stopcock is shifted so that the pressure of the patient's blood forces blood into the tubing, driving saline into the waste collection bag. When blood has reached the sampling site, blood is extracted with a hypodermic syringe.
    Type: Grant
    Filed: September 4, 1990
    Date of Patent: September 22, 1992
    Assignee: Medex, Inc.
    Inventor: Phillip D. Messinger
  • Method and apparatus for sampling blood
    Patent number: 5048537
    Abstract: A source of saline solution under pressure is connected through tubing to a catheter inserted in a patient's blood vessel. A waste collection bag is connected to the tubing through a stopcock which permits the selective connecting of the catheter to the waste collection bag or the bag of saline solution. The sampling site is in the tubing between the catheter and the stopcock. Normally, saline solution flows into the patient's blood vessel. When a sample is to be taken, the stopcock is shifted so that the pressure of the patient's blood forces blood into the tubing, driving saline into the waste collection bag. When blood has reached the sampling site, blood is extracted with a hypodermic syringe.
    Type: Grant
    Filed: May 15, 1990
    Date of Patent: September 17, 1991
    Assignee: Medex, Inc.
    Inventor: Phillip D. Messinger