Surgery – Diagnostic testing – Measuring or detecting nonradioactive constituent of body...
Patent
1999-01-05
2000-09-26
O'Connor, Cary
Surgery
Diagnostic testing
Measuring or detecting nonradioactive constituent of body...
128898, 600345, 600350, A61B 500
Patent
active
06125293&
ABSTRACT:
The carbon dioxide tension in the wall of the stomach or gastrointestinal tract is determined by inserting into the stomach a semipermeable balloon filled with a saline solution. The result obtained from analyzing the carbon dioxide fraction in the saline solution is multiplied by a correction factor to obtain a stabilized measured value for the carbon dioxide fraction relating to the blood flowing through the wall of the stomach or the gastrointestinal tract, which stabilized measured value corresponds to a measured carbon dioxide fraction pertaining to a retention time of an hour or more, and multiplying the carbon dioxide tension PaCO.sub.2 in the arterial blood with a first factor F.sub.1 to obtain a first correction product, and multiplying the stabilized value of the carbon dioxide tension PiCO.sub.2 in the blood flowing through the wall of the stomach or the gastrointestinal tract by a second factor F.sub.2 to obtain a second correction product, and adding the first correction product to a basic factor F.sub.0 and subtracting the second product therefrom in accordance with the formula:
REFERENCES:
patent: 5158083 (1992-10-01), Sacristan et al.
patent: 5423320 (1995-06-01), Salzman et al.
patent: 5456251 (1995-10-01), Fiddian-Green
Academisch Ziekenhuis Groningen
Astorino Michael
O'Connor Cary
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