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

Kirsteen Goodman, Lee Ann Hodges, Janet Band, Howard Stevens, Werner Weitschies, Clive Wilson

Research output: Contribution to journalArticle

32 Citations (Scopus)

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.
LanguageEnglish
Pages84-92
Number of pages9
JournalEuropean Journal of Pharmaceutics and Biopharmaceutics
Volume74
Issue number1
DOIs
Publication statusPublished - 15 Jan 2010

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Gastrointestinal Motility
Radionuclide Imaging
Tablets
Equipment and Supplies
Enteric-Coated Tablets
Gastrointestinal Transit
Dosage Forms
Cross-Over Studies
Gastrointestinal Tract
Stomach
Food

Keywords

  • gastrointestinal motility
  • gamma scintigraphy
  • magnetic imaging

Cite this

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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{\circledR} 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{\circledR} 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.",
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Assessing gastrointestinal motility and disintegration profiles of magnetic tablets by a novel magnetic imaging device and gamma scintigraphy. / Goodman, Kirsteen; Hodges, Lee Ann; Band, Janet; Stevens, Howard; Weitschies, Werner; Wilson, Clive.

In: European Journal of Pharmaceutics and Biopharmaceutics, Vol. 74, No. 1, 15.01.2010, p. 84-92.

Research output: Contribution to journalArticle

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