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The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

The Department also includes the iSchool Research Group, which performs leading research into socio-technical phenomena and topics such as information retrieval and information seeking behaviour.

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Assessing gastrointestinal motility and disintegration profiles of magnetic tablets by a novel magnetic imaging device and gamma scintigraphy

Goodman, Kirsteen and Hodges, Lee Ann and Band, Janet and Stevens, Howard and Weitschies, Werner and Wilson, Clive (2010) Assessing gastrointestinal motility and disintegration profiles of magnetic tablets by a novel magnetic imaging device and gamma scintigraphy. European Journal of Pharmaceutics and Biopharmaceutics, 74 (1). pp. 84-92. ISSN 0939-6411

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Abstract

Study aims to validate Magnetic Moment Imaging (MMI) for the investigation of gastrointestinal transit and disintegration of solid dosage forms and to correlate the MMI findings with the corresponding gamma scintigraphic data. Three magnetic tablets (MTs) were investigated using in vitro and in vivo tests. The clinical study was a four-way, crossover study with the following arms: (a) immediate-release tablets administered in fasted state; (b) immediate-release tablets administered after 400 mL of Clinutren® ISO; (c) enteric-coated tablets administered in the fasted state; and (d) non-disintegrating tablets studied in the lightly fed state (100 mL of Clinutren® ISO). In both the in vitro and in vivo studies, tablets were detected successfully by MMI and scintigraphy. There was a good correlation between gastric residence times and positional data (in the x, y and y, z-axes). In addition, MMI revealed early swelling behaviour of the tablet matrix. There was excellent agreement for the disintegration times of MT(A) in the fasted arm (scintigraphy 12.0 ± 4.4 min, MMI 11.8 ± 4.4 min). In the MT(A)-fed arm, onset times determined by scintigraphy were delayed in three subjects when compared to the corresponding MMI results. Delayed disintegration was observed with MT(A) administered after food (p < 0.01) in both the techniques. The MMI device is a reliable imaging tool for tracking the transit and disintegration of a magnetic tablet through the gastrointestinal tract.