Digestive Diseases and Sciences

, Volume 31, Issue 11, pp 1211–1216

Computer analysis of human esophageal peristalsis and lower esophageal sphincter pressure

II. An interactive system for on-line data collection and analysis
  • June A. Castell
  • Donald O. Castell
Original Articles


A computer program has been written to directly read and analyze esophageal manometric tracings on-line using low-cost off-the-shelf microcomputer hardware. The system consists of an Apple IIe microcomputer and an Interactive Microwave Inc. ADALAB Data Acquisition System with an AI13 fast A/D Multiplexer. The primary program is in BASIC with ASSEMBLY language subroutines for data collection. Data are collected through the voltage output of a Hewlett-Packard recorder at 30 points per second on four channels for lower esophageal sphincter pressures (LESP) and three channels for peristaltic waves. Computer-determined values for LESP and wave parameters showed excellent correlation with mean values as read by five individuals experienced in esophageal manometry.


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Copyright information

© Plenum Publishing Corporation 1986

Authors and Affiliations

  • June A. Castell
    • 1
  • Donald O. Castell
    • 1
  1. 1.Department of Medicine, Section on GastroenterologyBowman Gray School of MedicineWinston-Salem

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