Esophageal function and EKG monitor

Details Esophageal function and EKG monitor Esophageal function and EKG monitor

1983-06-16

1985-03-12

Cohen, Lee S.

Surgery

Truss

Pad

128670, 128780, A61B 500

Patent

active

045038597

ABSTRACT:
A monitoring system which records data relating to esophageal acidity fluctuations. The data is recorded on a miniature tape recorder and is then played back and converted to a visually perceptible format. The system has a unique interface circuit for converting the voltage difference between an esophageal probe and a reference electrode into a frequency modulated signal for recording. Another interface circuit reconverts the recorded frequency modulated signal into a voltage for a strip chart recorder. A multi-monitor embodiment is also disclosed which records data relating to esophageal spasms and heart activity in addition to esophageal acidity fluctuations.

REFERENCES:
patent: 3888237 (1975-06-01), Mori
patent: 4381011 (1983-04-01), Somers
patent: 4413628 (1983-11-01), Tamulis
Ask et al., "Combined pH and Press, Measurement Device for Oesophageal Investigations"; Med. and Biol. Eng. Comput., 7-1981, vol. 19, No. 4, pp. 443-446.
Lee et al., "Integrated System for Esophageal pH Monitoring"; IEEE Engr. in Med. and Biol., 10-1979, pp. 53-54.
Sanders et al., "Solid State Portable Gastroesophageal Reflux pH Recorder"; 33rd ACEMB; 10-1980, p. 54.
Falor et al., "24 Hr. Esophageal pH Monitoring by Telemetry"; Amer. Journ. of Surgery; vol. 142, 10-1981, pp. 514-516.
"Model 7700 Gastroreflux Data Analyzer"; Del Mar Avionics, 9-1982.
"Model 700 Gastroreflux Recorder"; Del Mar Avionics, 10-1982.
"Flexible pH Electrode for Esophageal and Gastro-Intestinal Research"; Micro-Electrodes, Inc.
"Medilog", Oxford Medical Systems.
"Advertisement for Millar Catheter Pressure Transducers".

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