Intraesophageal catheter with pH sensor
Patent 4981470 Issued on January 1, 1991. Estimated Expiration Date: 
June 21, 2009. 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 21, 2009. 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 2857915 3373735 3480003 3905889 Miniature balloon catheter Esophageal function and EKG monitor Patient monitoring apparatus and method Ambulatory esophageal pH monitor Antimony electrode assembly and method of manufacture, and use thereof Balloon assembly for esophageal probe InventorAssigneeApplicationNo. 371983 filed on 06/21/1989US Classes:600/350, Esophageal or gastrointestinal fluids128/205.23, Indicator structure128/207.14, Respiratory gas supply means enters mouth or tracheotomy incision600/361, pH600/593, Esophagus, stomach, or lower alimentary canal606/196Nose or throatExaminersPrimary: Yasko, John D.Assistant: Cermak, Adam J. Attorney, Agent or FirmForeign Patent References
International ClassA61B 005/05AbstractAn intraesophageal catheter comprising a tubular body, a pH sensor extending through the interior of the tubular body for pH measurement, and a balloon inflation pressure sensor communicating with the interior of the tubular body. The tubular body is comprised of clear polyvinyl chloride material and has a radiopaque stripe extending longitudinally along the tubular body. A plurality of circumferential gradations are marked on the tubular body. The pH sensor has a head portion fastened to the end of the tubular body and a conductor connected to and extending from the head portion to the other end of the tubular body. The head portion is comprised of a polycarbonate material having a smooth surface. The balloon inflation pressure sensor is a balloon that is positioned on the tubular body part from the head portion of the pH sensor. A balloon inflation channel extends through the interior of the tubular body and communicates with the balloon molded to the exterior surface of the tubular body.Other References
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