The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 02, 2000
Filed:
Sep. 29, 1997
Richard Owens, San Antonio, TX (US);
Robert Persky, San Antonio, TX (US);
Gary W Muniz, San Antonio, TX (US);
Steven C Koenig, Floyds Knobs, IN (US);
Craig A Reister, San Antonio, TX (US);
Abstract
An apparatus and method for calibrating the pressure readings obtained by catheter tip pressure transducers. The apparatus includes a Plexiglas vessel covered by a closure containing eight catheter ports through which the transducers are introduced into the vessel. The vessel is filled with saline solution that has been warmed to body temperature. The transducer ends of the catheters are inserted through airtight hemostatic control valves into the vessel through the catheter ports. Plexiglas guide tubes are used to guide the transducers into the saline solution at predetermined distances below the surface of the saline solution. The distances are used to calculate the hydrostatic pressures exerted upon the transducers by the saline solution. Known pressures are applied to the transducers through an airtight pressure port in the closure. Calculated hydrostatic pressures are added to the known pressures to provide calibration pressures for comparison with monitored pressure readings.