Intragastric pH measurement using a novel disposable sensor.
An unique disposable pH sensor molded into the end of a nasogastric tube was tested in twelve healthy human volunteers. A Spearman's rank correlation coefficient (rs) of 0.90 was observed for the sensor and an indwelling miniature glass membrane electrode. The sensor did not correlate as well with aspirated stomach fluid (rs = 0.68). No sensor calibration was necessary and the sensors measured +/- 0.1 pH in laboratory pH buffers before and after the clinical study. Both bare and shielded disposable sensors closely agreed with a shielded miniature glass electrode.
Heath
M J
MJ
Zinetics Medical Technology Inc., Salt Lake City, Utah.
Owen
J D
JD
Sanders
S W
SW
Tolman
K G
KG
D000328:Adult; D004209:Disposable Equipment; D004566:Electrodes; D005260:Female; D005745:Gastric Acidity Determination / Q000295:instrumentation*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007441:Intubation, Gastrointestinal / Q000295:instrumentation*; D008297:Male; D008839:Microelectrodes