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:
Nov. 14, 2000
Filed:
Jun. 03, 1999
Jeffrey P Lewis, Wyomissing, PA (US);
Troy A Werley, West Lawn, PA (US);
Raymond Newswanger, Terre Hill, PA (US);
Glenn Fulmer, Oley, PA (US);
Arrow International, Inc., Reading, PA (US);
Abstract
An implantable VAD (preferably an LVAD) includes a compliance chamber which forms a reservoir for liquid extending from adjacent the bottom of the compliance chamber upwardly towards the top of the compliance chamber, and a chamber for gas disposed above the liquid reservoir and extending upwardly to the top of the compliance chamber. The gas chamber is in gaseous communication with a blood pump via a conduit. A subcutaneous port is in liquid and gaseous communication with the liquid reservoir via a second conduit for introducing make-up gas into or removing excess gas from the gas chamber via the liquid reservoir and for removing accumulated liquid from the liquid reservoir. An outlet cannula comprises a hard polymer tubing commencing adjacent the pump and a relatively soft graft tubing terminating adjacent the tube adapted to enter the aorta, a distal end of the hard polymer tubing and a proximal end of the graft tubing being secured together by a snap-fit connector. A sewable apical cuff is provided for sewing attachment of the inlet cannula to a chamber of the heart, and a collet ring clamp secures together the distal end of the apical cuff and the distal end of the tube.