Electrolytic pressure transduction system
Patent 4561450 Issued on December 31, 1985. Estimated Expiration Date: 
October 3, 2004. 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.
October 3, 2004. 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 3437088 3480003 Esophageal transducer Polymeric sensor of vibration and dynamic pressure 4030481 Urethral profilometry catheter Catheter for measuring intrauterine pressure Gastroesophageal reflux diagnostic tool Esophageal pressure monitoring device Catheter InventorAssigneeApplicationNo. 06/657438 filed on 10/03/1984US Classes:600/593Esophagus, stomach, or lower alimentary canalExaminersPrimary: Cohen, Lee S.Assistant: Sykes, Angela D. Attorney, Agent or FirmInternational ClassA61B 5/03 (20060101)AbstractThis invention is directed to a Wheatstone bridge circuit for measuring pressure in the distal esophageal sphincter (D.E.S.) as well as in other organs and bodily cavities. A flexible hollow tube having three spaced electrodes is lodged in the esophagus. The tube is partly filled with a saline solution to cover the electrodes, thereby producing two series connected, pressure sensitive resistors. The electrolytic resistors are coupled to two series connected fixed resistors to complete the bridge circuit. Electrical imbalances in the bridge circuit are measured in terms of the pressure corresponding to the pressure applied by the D.E.S.Other References
| |
