{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,13]],"date-time":"2025-12-13T22:57:41Z","timestamp":1765666661501},"reference-count":16,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2004,9,27]],"date-time":"2004-09-27T00:00:00Z","timestamp":1096243200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Neurogastroenterology Motil"],"published-print":{"date-parts":[[2004,12]]},"abstract":"<jats:p><jats:bold>Abstract\u2002<\/jats:bold> In all systems for impedance monitoring signals are stored in digital format after analog\u2010to\u2010digital conversion at a predefined rate, the sample frequency. We aimed to find the minimum sample frequency required to evaluate oesophageal transit and gastro\u2010oesophageal reflux studies using impedance monitoring. In 10 healthy subjects and five patients with gastro\u2010oesophageal reflux disease impedance signals were acquired during a 90\u2010min postprandial period, using a sample frequency of 1000\u2003Hz. Additionally, 10 liquid swallows were recorded in the healthy subjects. A dedicated computer program was used to derive, from the original 1000\u2010Hz files, series of new data files with sample frequencies of 500, 200, 100, 50, 20, 10, 8, 5 and 4\u2003Hz. In all of these files, liquid and gas reflux events were identified. In the analysis of the swallows, bolus head advance time (BHAT) and total bolus transit time were measured. Reflux events were detectable down to a sample frequency of 50\u2003Hz. In transit analysis errors for BHAT at frequencies below 8\u2003Hz errors exceeded 2.5%. Therefore, in impedance monitoring the minimum sample frequency is 50\u2003Hz for the detection of reflux and 8\u2003Hz for the evaluation of oesophageal transit.<\/jats:p>","DOI":"10.1111\/j.1365-2982.2004.00575.x","type":"journal-article","created":{"date-parts":[[2004,12,3]],"date-time":"2004-12-03T17:04:03Z","timestamp":1102093443000},"page":"713-719","source":"Crossref","is-referenced-by-count":28,"title":["Minimum sample frequency for multichannel intraluminal impedance measurement of the oesophagus"],"prefix":"10.1111","volume":"16","author":[{"given":"A. J.","family":"Bredenoord","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"B. L. A. M.","family":"Weusten","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"R.","family":"Timmer","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A. J. P. 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