A Small pH Sensor Catheter of the Endoscope for Acidity Test of Gullet and Stomach
- Authors
- Roh, Ji-Hyoung; Shin, Kyu-Sik; Cho, Nam-Kyu; Lee, Don-Haeng; Moon, Byung-Moo; Lee, Dae-Sung
- Issue Date
- 2008
- Publisher
- MYU, SCIENTIFIC PUBLISHING DIVISION
- Keywords
- gastroesophageal reflux disease (GERD); pH; ISFET; endoscope
- Citation
- SENSORS AND MATERIALS, v.20, no.8, pp.417 - 424
- Indexed
- SCIE
SCOPUS
- Journal Title
- SENSORS AND MATERIALS
- Volume
- 20
- Number
- 8
- Start Page
- 417
- End Page
- 424
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/125576
- ISSN
- 0914-4935
- Abstract
- 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.
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