Abstract: A bar graph display feature for clinical viewing of supplemental oxygen (SpO2) or blood oxygen percentage, Pulse Rate, and Fraction of Inspired Oxygen (FiO2) levels as derived from an adaptive supplemental oxygen controller is described. A bar graph is a moving histogram of SpO2, Pulse Rate, and FiO2 by using a computer that calculates a FiO2 by using SpO2 feedback. The bar graph displays stored data on a flat screen or LCD over specified periods. Other display features include alarm conditions: 1) Upper FiO2 Limit, 2) Motion Detection, 3) Power Loss, 4) Battery Backup, and 5) Pressure Loss. The Upper FiO2 Limit is a calculation of FiO2 by using SpO2 feedback from a pulse oximeter. The invention also relates to an adaptive oxygen control system whereas adjustment of system time constant and system delay provides application of the control system for use with an oxygen mask, oxyhood or nasal cannula.

Abstract: A pair of solenoid air/oxygen mixing systems used by an adaptive controller for delivering fractional inspired oxygen to a patient is described. The solenoid control system comprises either a bi-modal solenoid or a proportional solenoid air/oxygen mixing system to derive a fraction of inspired oxygen delivered to a patient. In the bi modal solenoid air/oxygen mixing system, a derived fraction of insipid oxygen is delivered to a patient. The bi-modal mixer uses a three-way valve solenoid. The solenoid has two input gas ports and one output gas port. Toggling between the two input port gases generates an output gas oxygen concentration. In contrast with the bi-modal solenoid, variation or proportionality between the two input port gases generates an output gas oxygen concentration. Both solenoid systems use a mini-computer and digital controller with software to control the fraction of inspired oxygen delivered to a patient. Finally, several therapeutic applications are described.

Abstract: Video-stereoscopic-image-producing system and a method for using the system is taught. The system is disclosed in conjunction with medical applications, specifically, in an embodiment useful for examining eyes. The system includes a binocular viewer for producing a pair of input images of an object which may be viewed to produce a stereoscopic image of the object. Video cameras are provided to receive a pair of images so produced and for producing, in turn, video signals representative of those images. An interface is provided for optically joining the video cameras to the binocular viewer. Video digitizing and freeze-frame equipment is joined to the cameras for generating a video display of the pair of input images and a stereoscopic viewer is provided for use with the video monitor for providing stereoscopic viewing of the displayed images by an observer.

Abstract: The invention involves an adapter with peripheral image averaging means for exposure control or attaching an automatic exposure control camera or camera with an exposure meter to a microscope for the purpose of photographing the material on the microscope stage. The adapter uses a separating element which divides the magnified image into the part which completely fills the camera's rectangular film format allowing it to pass to the film without appreciable interference and the remaining part, the peripheral image, which the separating element collects and directs toward the camera's automatic exposure control port where a reflector aims the extracted second part of the magnified image onto a translucent screen in front of the camera's exposure control port.