Patent ID: 6509169
Filing Date: 2003-01-21
Classification: A61B,G01N,Y02A

Abstract:
A method for detecting the presence of Helicobacter pylori in the gastroenteral tract of a subject, the method comprising the steps of:a) obtaining a volume of gas from the lungs and/or stomach of the subject; b) dividing the said volume of gas into first and second substantially equal portions; c) causing or permitting the first said portion of gas to come into intimate contact with a first electronic or electrochemical ammonia sensor connected to means for measuring the electrical resistance of the said first sensor; d) causing or permitting the second said portion of gas to come into intimate contact with ammonia absorbing means and then into intimate contact with a second electronic or electrochemical ammonia sensor connected to means for measuring the electrical resistance of the said second sensor; e) measuring the resistance of the first and second sensors when in contact with the said portions of gas; f) comparing the said resistances of the sensors to produce a compared value; and g) producing a visible output signal to indicate a positive or negative diagnosis of Helicobacter pylori infection according to whether or not the compared value exceeds a predetermined threshold value.