AIR TONOMETRY MEASUREMENT OF INTRALUMINAL GASTROINTESTINAL PCO2/PO2

摘要

A method and apparatus for measuring or monitoring pCO2, and optionally pO2, on a real-time basis, in the stomach or the intestine using air tonometry. The intraluminal measurements are made using a catheter (14) having a pCO2 sensor (12), and optionally a PO2 sensor, at its tip (14a) for in situ measurements, or by circulating a fixed amount of air through the catheter (14) with measurement occurring at the proximal end (14b) of the catheter (14). Instrumentation (16) supporting the sensor may be adapted for location within a patient or external to a patient.