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:
Jul. 08, 1986
Filed:
Oct. 23, 1984
Joel Cummings, Ocala, FL (US);
Michael D Hooven, Miami, FL (US);
Cordis Corporation, Miami, FL (US);
Abstract
A portable instrument system is provided for the testing of pressure and flow characteristics of implantable ventricular shunt valves using a gaseous testing fluid that may be drawn from the testing environment. The system includes a rate pump having a control mechanism that provides a variety of selective constant flow rates so that the valve characteristics can be determined under various operating conditions. Fluid communication is provided between the pump, the valve and a pressure sensing device such that the pressure sensing device receives the same pressure and flow rate that the valve does. Typically, the pressure sensing device is a gauge transducer that utilizes atmospheric pressure as a reference point and senses the changes in the gas pressure in the valve, relaying the pressure readings to a digital display or chart recorder.