Process and device for measuring exhaled air to determine...

Details Process and device for measuring exhaled air to determine... Process and device for measuring exhaled air to determine...

2006-01-31

2006-01-31

Nasser, Robert L. (Department: 3736)

Surgery

Diagnostic testing

Respiratory

C600S531000, C073S023300

Reexamination Certificate

active

06991607

ABSTRACT:
A process and a device are provided for determining the proportion of a component of the air exhaled by a breathing living being that is characteristic of the metabolic function of such living being. The invention relates to a process for determination of a first component Aa,1in the air exhaled by a patient that is characteristic of the metabolic function of the patient such as carbon dioxide (CO2) or oxygen (O2), where the exhaled air having at least two components (i=1, 2, . . . ) each having a proportion Aa,i. The molecular weights M; and the adiabatic coefficients kiof the components are known. The process measures the velocity of sound vSin the exhaled air, and the portion Ai,1of the first component in the exhaled air is calculated by use of the measured velocity, at a temperature T of the exhaled air. The proportion of the component is determined by the equation MG/kG=R×T/(vs2), where MG=sum(Aa,i×Mi), i=1, 2, . . . , and where MGis the molecular weight of the exhaled air, and 1/(1−kG)=sum(Aa,i/(1−ki)), i=1, 2, . . . , where kGis the adiabatic coefficient, and R is the universal gas constant.

REFERENCES:
patent: 3981176 (1976-09-01), Jacobs
patent: 5060506 (1991-10-01), Douglas
patent: 5214966 (1993-06-01), Delsing
patent: 5392635 (1995-02-01), Cadet et al.
patent: 5581014 (1996-12-01), Douglas
patent: 6076392 (2000-06-01), Drzewiecki
patent: 44596 (1982-01-01), None
patent: WO 9313414 (1993-07-01), None

Affiliated with

Also associated with

Rating

Process and device for measuring exhaled air to determine... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process and device for measuring exhaled air to determine..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and device for measuring exhaled air to determine... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3552652