Digestive Diseases and Sciences

, Volume 32, Issue 9, pp 953–961

Pattern-recognition program for analysis of colon myoelectric and pressure data

  • Rodger Parker
  • William E. Whitehead
  • Marvin M. Schuster
Original Articles

Abstract

A pattern-recognition program was developed which emulates visual scoring of colonic myoelectric and pressure recordings. It smoothes digitized data with a moving average filter, computes difference scores between successive groups of three data points, and uses the signs of these difference scores to detect the beginning and end of waves. Adjacent waves are merged if their means are closer than 1.67 times the sum of their standard deviations, and amplitude and duration criteria are used to exclude nonsignificant waves. When compared to four experienced human scorers on randomly selected records, the program agreed as well with the human scorers as they agreed with each other, and it approached the level of agreement of these observers with themselves when they were asked to rescore the same records blindly four to six weeks later. Human scorers agreed with themselves on 36–71% of myoelectric slow waves and on 42–88% of pressure waves, compared to 100% test-retest reliability for the pattern-recognition program. Frequency histograms of the duration of waves detected by the pattern-recognition program differed from the spectra generated by the fast Fourier transform (FFT) method. This pattern-recognition program provides an alternative to spectral analysis for the reliable and objective quantification of colonic myoelectric slow waves and pressure waves.

Key Words

scoring motility myoelectric activity computer spectral analysis fast Fourier transform pattern recognition colon 

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References

  1. 1.
    Snape WJ Jr, Carlson GM, Cohen S: Colonic myoelectric activity in the irritable bowel syndrome. Gastroenterology 70:326–330, 1976Google Scholar
  2. 2.
    Snape WJ Jr, Carlson GM, Matarazzo SA, Cohen S: Evidence that abnormal myoelectrical activity produces colonic motor dysfunction in the irritable bowel syndrome. Gastroenterology 72:383–387, 1977Google Scholar
  3. 3.
    Latimer P, Sarna S, Campbell D, Latimer M, Waterfall W, Daniel EE: Colonic motor and myoelectrical activity: A comparative study of normal subjects, psychoneurotic patients, and patients with irritable bowel syndrome. Gastroenterology 80:893–901, 1981Google Scholar
  4. 4.
    Welgan P, Meshkinpour H, Hoehler F: The effect of stress on colon motor and electrical activity in irritable bowel syndrome. Psychosomat Med 22:139–149, 1985Google Scholar
  5. 5.
    Whitehead WE, Schuster MM: Gastrointestinal Disorders: Behavioral and Physiological Basis for Treatment. New York, Academic Press, 1985Google Scholar
  6. 6.
    Whitehead WE, Engel BT, Schuster MM: Irritable bowel syndrome: Physiological and psychological differences between diarrhea-predominant and constipation-predominant patients. Dig Dis Sci 25:404–413, 1980Google Scholar
  7. 7.
    Randall RB: Application of B & K Equipment to Frequency Analysis. Naerum (Denmark), Bruel and Kjaer, 1977Google Scholar
  8. 8.
    Mueller GM, Hoelzl R, Bruechle HA: Conjoint gastrography: Principles and techniques.In Psychophysiology of the Gastrointestinal Tract: Experimental and Clinical Applications. R Hoelzl, WE Whitehead (eds). New York, Plenum 1983, pp 123–159Google Scholar
  9. 9.
    Schemann M, Ehrlein H-J, Sahyoun H: Computerized method for pattern recognition of intestinal motility: Functional significance of the spread of contractions. Med Biol Eng Comput 23:143–149, 1985Google Scholar

Copyright information

© Plenum Publishing Corporation 1987

Authors and Affiliations

  • Rodger Parker
    • 1
    • 2
  • William E. Whitehead
    • 1
    • 2
  • Marvin M. Schuster
    • 1
    • 2
  1. 1.Division of Digestive DiseaseThe Johns Hopkins University School of MedicineBaltimore
  2. 2.Division of Digestive DiseaseFrancis Scott Key Medical CenterBaltimore

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