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Microcomputer-based system for 24-hour recording of oesophageal motility and pH profile with automated analysis

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Abstract

A system developed for long-term simultaneous recording of eosophageal motility and pH in the ambulant patient is described. The system consists of a microprocessor based data-acquisition and preprocessing device, a personal computer for postprocessing, report generation and data storage, a miniature two-sensor pressure catheter and a pH electrode. Identification and classification of oesophageal contractions are performed in separate steps, using online preprocessing software for identification and offline postprocessing software for categorisation, classification and report generation. Contractions are categorised as peristaltic, simultaneous or nontransmitted and classified according to their amplitude, duration and propagation velocity. The method described reduces the amount of data from 870 kbyte to approximately 40kbyte per 24 hours in a multiparameter recording device, and offers the opportunity for offline postprocessing with different sets of criteria. The system has been found to be accurate and reliable in 24-hour studies in both healthy volunteers and patients with non-cardiac chest pain.

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Authors and Affiliations

  1. Department of Instrumentation, University Hospital of Utrecht, Catharijnesingel 101, 3511 GV, Utrecht, The Netherlands

    M. Breedijk & C. van der Zouw

  2. Department of Surgery, University Hospital of Utrecht, Catharijnesingel 101, 3511 GV, Utrecht, The Netherlands

    A. J. P. M. Smout & L. M. A. Akkermans

  3. Department of Automation, University Hospital of Utrecht, Catharijnesingel 101, 3511 GV, Utrecht, The Netherlands

    H. Verwey

Authors
  1. M. Breedijk
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  2. A. J. P. M. Smout
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  3. C. van der Zouw
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  4. H. Verwey
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  5. L. M. A. Akkermans
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Breedijk, M., Smout, A.J.P.M., van der Zouw, C. et al. Microcomputer-based system for 24-hour recording of oesophageal motility and pH profile with automated analysis. Med. Biol. Eng. Comput. 27, 41–46 (1989). https://doi.org/10.1007/BF02442168

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  • DOI: https://doi.org/10.1007/BF02442168

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