pp. 417-424
S&M739 Research Paper of Special Issue https://doi.org/10.18494/SAM.2009.571 Published: March 19, 2009 A Small pH Sensor Catheter of the Endoscope for Acidity Test of Gullet and Stomach [PDF] Ji-Hyoung Roh, Kyu-Sik Shin, Nam-Kyu Cho, Don-Haeng Lee, Byung-Moo Moon and Dae-Sung Lee (Received August 1, 2008; Accepted November 19, 2008) Keywords: gastroesophageal reflux disease (GERD), pH, ISFET, endoscope
The detection of pH in the gullet and stomach is highly significant for the diagnosis of gastroesophageal reflux disease (GERD), particularly with the use of a pH sensor in vivo. Most conventional pH sensors are used singly and could not be inserted in the endoscope’s working channel. Because the ion sensitivity field-effect transistor (ISFET) chip has become very small, we have made the pH sensor smaller than a conventional glass pH sensor, and have used it. In this paper, we introduce a small in vivo pH sensor catheter of 2.7 mm diameter and 8 mm length, which can be put in the endoscopy’s working channel of 3 mm diameter. The catheter was evaluated in buffer solution (pH 2–12) and its sensitivity was 43 mV/pH. It was confirmed that the catheter properly functioned during an animal experiment.
Corresponding author: Dae-Sung LeeCite this article Ji-Hyoung Roh, Kyu-Sik Shin, Nam-Kyu Cho, Don-Haeng Lee, Byung-Moo Moon and Dae-Sung Lee, A Small pH Sensor Catheter of the Endoscope for Acidity Test of Gullet and Stomach, Sens. Mater., Vol. 20, No. 8, 2009, p. 417-424. |