Darryl Kent Backman
Engineers in Salt Lake City, UT

5807321, Sep 15, 1998

Nov 28, 1995

8/563361

Ronald L. Stoker - South Jordan UT
Darryl Kent Backman - Salt Lake City UT
Christopher L. Durham - Salt Lake City UT
Jerrold L. Foote - Salt Lake City UT
Garlyn W. Hendry - Salt Lake City UT
Gregory R. McArthur - Sandy UT
Jon Rhees - Riverton UT
Thomas D. Stout - Salt Lake City UT
Steve R. Taylor - Salt Lake City UT
William Woelper - Sandy UT

Merit Medical - South Jordan UT

A61M 3100

604 65

A system and method for electronically monitoring and displaying digital flow data relevant to the administration of a parenteral fluid, such as a contrast medium, to a patient is disclosed. The system includes a disposable fluid flow indicator, adapted to be detachably connected in fluid communication with a contrast media source. The fluid flow indicator measures the amount of contrast media dispensed from the source and administered to a patient, and provides an indication of the amount dispensed based on the movement of a displacement indicator. Also disclosed is an electronic controller, which is adapted to be detachably connected to the fluid flow indicator. The controller includes a sensor interface circuit, which operably interfaces the electronic controller circuitry with the fluid flow indicator so that the fluid flow measurement indicator is optically detected by the sensor circuit, which in turn generates a representative electrical flow signal. The electrical flow signal is received and processed by a programmable digital processor contained within the electronic controller in a manner so as to continuously track and generate digital flow data. The digital flow data includes information regarding the amount of contrast medium remaining within the contrast source, and the amount of medium that has been delivered to the patient.

5735825, Apr 7, 1998

Mar 22, 1996

8/620386

Brian W. Stevens - Pleasant Grove UT
Darryl Kent Backman - Salt Lake City UT
Garlyn W. Hendry - Salt Lake City UT

Merit Medical Systems, Inc. - South Jordan UT

A61M 500

604218

A sealing cap is provided for attachment to the end of a syringe plunger. The sealing cap has an annular sidewall with an annular first sealing wing projecting distally therefrom, an annular second sealing wing positioned proximal of the first sealing wing and projecting proximally, and an annular sealing ridge encircling and radially projecting out from between the first sealing wing and the second sealing wing. The sealing cap further includes an interior cavity having an annular side surface aligned with the annular sidewall. A side groove is recessed within the side surface so as to be aligned slightly proximal of the annular sealing ridge. The distal end of a syringe plunger has a head mounted thereon that is substantially complementary to the configuration of the internal cavity of the sealing cap. More specifically, a tapered ridge is formed on the periphery of the head to complementarily be received within the side groove. As a positive pressure is created against the sealing cap, the first sealing wing flexes against the interior surface of the barrel and the annular sealing ridge urges against the interior surface of the barrel, thereby increasing the effective seal.