Esophageal function and EKG monitor
Patent 4503859 Issued on March 12, 1985. Estimated Expiration Date: 
June 16, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 16, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3888237 Enteral feeding apparatus and method pH Monitor electrode electrolyte cartridge Patent #: 4413628 InventorsApplicationNo. 06/505146 filed on 06/16/1983US Classes:600/350, Esophageal or gastrointestinal fluids600/483, Simultaneously detecting cardiovascular condition and diverse body condition600/593Esophagus, stomach, or lower alimentary canalExaminersPrimary: Cohen, Lee S.Assistant: Sykes, Angela D. Attorney, Agent or FirmInternational ClassesA61B 5/00 (20060101)A61B 5/0408 (20060101) A61B 5/042 (20060101) A61B 5/03 (20060101) G01N 27/28 (20060101) AbstractA 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.Other References
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