Biomaterial Database

Computer analysis of human esophageal peristalsis and lower esophageal sphincter pressure. II. An interactive system for on-line data collection and analysis. 1986

J A Castell, and D O Castell

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.

UI	MeSH Term	Description	Entries
D008365	Manometry	Measurement of the pressure or tension of liquids or gases with a manometer.	Tonometry,Manometries
D008838	Microcomputers	Small computers using LSI (large-scale integration) microprocessor chips as the CPU (central processing unit) and semiconductor memories for compact, inexpensive storage of program instructions and data. They are smaller and less expensive than minicomputers and are usually built into a dedicated system where they are optimized for a particular application. "Microprocessor" may refer to just the CPU or the entire microcomputer.	Computers, Personal,Microprocessors,Computer, Personal,Microcomputer,Microprocessor,Personal Computer,Personal Computers
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D009862	Online Systems	Computer-based Information systems having real-time remote access to information or processes.	On-Line Systems,On Line Systems,On-Line System,Online System,System, On-Line,System, Online,Systems, On-Line,Systems, Online
D010528	Peristalsis	A movement, caused by sequential muscle contraction, that pushes the contents of the intestines or other tubular organs in one direction.	Peristalses
D011312	Pressure	A type of stress exerted uniformly in all directions. Its measure is the force exerted per unit area. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)	Pressures
D003199	Computer Systems	Systems composed of a computer or computers, peripheral equipment, such as disks, printers, and terminals, and telecommunications capabilities.	Computer Architecture,Computer System,Computer Systems Development,Computer Systems Evaluation,Computer Systems Organization,Real Time System,Real-Time Systems,Organization, Computer Systems,Architecture, Computer,Architectures, Computer,Computer Architectures,Computer Systems Evaluations,Development, Computer Systems,Evaluation, Computer Systems,Evaluations, Computer Systems,Real Time Systems,Real-Time System,System, Computer,System, Real Time,System, Real-Time,Systems, Computer,Systems, Real Time,Systems, Real-Time,Time System, Real,Time Systems, Real
D003625	Data Collection	Systematic gathering of data for a particular purpose from various sources, including questionnaires, interviews, observation, existing records, and electronic devices. The process is usually preliminary to statistical analysis of the data.	Data Collection Methods,Dual Data Collection,Collection Method, Data,Collection Methods, Data,Collection, Data,Collection, Dual Data,Data Collection Method,Method, Data Collection,Methods, Data Collection
D004943	Esophagogastric Junction	The area covering the terminal portion of ESOPHAGUS and the beginning of STOMACH at the cardiac orifice.	Gastroesophageal Junction,Gastroesophageal Junctions,Junction, Esophagogastric,Junction, Gastroesophageal,Junctions, Gastroesophageal
D004947	Esophagus	The muscular membranous segment between the PHARYNX and the STOMACH in the UPPER GASTROINTESTINAL TRACT.