Portable circuit and method for performing a time study and analysis of bodily characteristics

Patent 4748562 Issued on May 31, 1988. Estimated Expiration Date:

September 19, 2006. 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.

Abstract Claims Description Full Text

Patent References

3889255

Device for measuring pH and temperature of a liquid, which includes a memory
Patent #: 4109527
Issued on: 08/29/1978
Inventor: Goode, Jr.

Magnetoacoustic position sensor employing pulse code sequence generators and detectors
Patent #: 4319189
Issued on: 03/09/1982
Inventor: Cullum, Jr. , et al.

Circuit and method for the radiotelemetry of esophageal pH in an ECG radiotelemetry system
Patent #: 4326535
Issued on: 04/27/1982
Inventor: Steffel , et al.

Well production control system
Patent #: 4594665
Issued on: 06/10/1986
Inventor: Chandra , et al.

Portable circuit and method for performing a time study and analysis of bodily ionic characteristics Patent #: 4618929
Issued on: 10/21/1986
Inventor: Miller , et al.

Inventors

Assignee

Akron City Hospital

Application

No. 06/910253 filed on 09/19/1986

US Classes:

600/350, Esophageal or gastrointestinal fluids600/348Determining ion concentration/partial pressure

Examiners

Primary: Ruggiero, Joseph
Assistant: Meyer, Charles B.

Attorney, Agent or Firm

Renner, Kenner, Greive, Bobak & Taylor

International Classes

A61B 5/05 (20060101)
G01N 27/28 (20060101)

Abstract

A portable circuit and method for performing a time study and analysis of bodily ionic characteristics as esophageal pH includes a transducer 11 for measuring pH and generating a proportional analog signal and an interface 12 for converting this signal into a representative digital signal including offset and gain controls 23,24 for permitting correction for transducer 11 calibration drift during the study period. A processor 14 receives and stores all digital signals for rapid transmission to a data analysis after the study period is ended. Esophageal pH values are measured and stored for a plurality of pre-study and post-study known conditions.

Other References

G Sanders, W. H. Ko, R. Jones and S. Vamvakas--A Solid State Portable Gastroesophageal Reflux pH Recorder (Abstract in Engineering in Medicine and Biology, 33rd Annual Conference, Washington, D.C. Oct. 1, 1980), sponsored by Alliance for Engineering in Medicine and Biology, Publisher: Institute for Electronic Engineers 1980-p. 54
Flexible pH Electrode for Esophageal and Gastro-Intestinal Research, Microelectrodes, Inc., 1979
Esophageal Disorders: Pathophysiology and Therapy, ed. T. R. DeMeester and D. B. Skinner, "Instrumentation for the Automatic Recording and Analysis of Esophageal pH", pp. 133-141, (1985)