Chiverton S G, Salena B J, Burget D W, Hunt R H
Division of Gastroenterology, McMaster University Medical Centre, Hamilton, Ont., Canada.
Dig Dis. 1990;8 Suppl 1:31-7. doi: 10.1159/000171277.
Hourly averaged data from continuous intraluminal pH recording were compared with the point aspiration in five 24-hour studies performed on healthy volunteers. Two different electrode positions were compared simultaneously with aspiration. The correlation was performed using the median from the whole hour's recording of the electrode against the aspiration point. There was a significant correlation between both electrodes and aspiration (p less than 0.001), although both electrodes read consistently lower than aspiration: electrode A (gastric antrum), median pH = 1.4; electrode B (gastric body), pH = 1.9; aspiration, pH = 2.3. These findings show that data reported in clinical trials using different recording techniques are not directly comparable and must be interpreted appropriately. The position of the electrode may also be important.
在对健康志愿者进行的五项24小时研究中，将连续腔内pH记录的每小时平均数据与定点抽吸数据进行了比较。同时比较了两个不同电极位置与抽吸情况。使用电极整个小时记录的中位数与抽吸点进行相关性分析。尽管两个电极的读数始终低于抽吸值，但两个电极与抽吸之间均存在显著相关性（p<0.001）：电极A（胃窦），pH中位数=1.4；电极B（胃体），pH=1.9；抽吸，pH=2.3。这些发现表明，使用不同记录技术的临床试验中报告的数据不可直接比较，必须进行适当解读。电极位置可能也很重要。
