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:
Sep. 04, 1990
Filed:
Jul. 25, 1988
David Giuliani, Mercer Island, WA (US);
Gerald G Vurek, Mt. View, CA (US);
Abbott Laboratories, Abbott Park, IL (US);
Abstract
A process for flushing clots from an intravascular probe including the steps of positioning a catheter assembly in a blood vessel and then delivering a flushant through the catheter and past the probe at two rates. The flushant is first delivered at a continual rate to maintain the catheter substantially free of blood clots. Periodically, a pulse of flushant is delivered at a second flow rate that is higher than the continual rate that is effective to clear the probe of incipient clots. The hydrodynamic clot flushing system includes a cather insertable within an arterial or venous blood vessel, the cather having an internal axial bore for conducting fluid and in which a probe is slidably received. A valve delivers a flushant through the internal axial bore of the catheter and around the probe at two selected rates. A plurality of radially arrayed ribs formed on either the internal wall of the catheter or the outside of the probe or both hold the probe away from the wall and provide fluid channels for conducting flushant to the probe tip.