Abstract: A system, method and apparatus for providing statistical estimates useful for decision support, including computer networks and software configured to provide such support. The methods and apparatus herein are particularly useful for providing information to health care providers, mission commanders and decision makers as it relates to the statistical modeling of the severity, prevalence and category of prevalence of various diseases in general, and to Acute Mountain Sickness in particular.

Abstract: An apparatus and method for supplemental oxygen administration to a patient that provides enhanced efficiency of oxygen use due to the administration of an oxygen bolus at the beginning of each inhalation by a patient. The supplemental oxygen delivery device utilizes first and second one-way valves corresponding to air inspiration and air expiration ports, respectively, and that are positioned in an air pathway so that air inspiration opens the first one-way valve to permit air flow through the air inspiration port and air expiration closes the first one-way valve and opens the second one-way valve to permit air expiration through the air expiration port. An oxygen supply source is connected to the device so as to provide an air bolus in the air pathway upstream and in front of the first one-way valve so as to provide a burst of oxygen during the first part of inhalation.