Leon J Arp: Method and apparatus for demand oxygen system monitoring and control. Rockey Rifkin and Ryther, November 24, 1992: US05165397 (77 worldwide citation)

An apparatus and method for controlling a respirating gas supply system responsive to a patient's respiration. The ratio of the time of the gas supply valve open to the time of the valve closed is measured and an automatic oxygen flow override is provided if the ratio is outside a set range. Various ...

Leon J Arp: Blood pump and oxygenator monitor-controller and display device. Henderson & Sturm, August 30, 1983: US04401431 (43 worldwide citation)

A blood pump and oxygenator monitor-controller and display device is disclosed. The device includes a plurality of data communication ports, a plurality of data and output control ports all operably connected to decision making or computer circuitry, and a plurality of digital and/or analog displays ...

Leon J Arp: Blood oxygenator. Henderson & Strom, January 27, 1976: US03934982 (19 worldwide citation)

A blood oxygenator comprising a first embodiment of a fluid tight housing having a chamber formed therein one end of which is fluid connected by a conduit to a source of blood to be oxygenated, the other end fluid connected for returning oxygenated blood to the source, a plurality of liquid impermea ...