초록 ▼

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 t

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.

대표청구항 ▼

[ We claim:] [1.] In an implantable VAD including a pump, a compliance chamber normally disposed above said pump, and a tube connecting said pump and said compliance chamber in liquid and gaseous communication,the improvement comprising:(A) said compliance chamber forming:(i) a reservoir for liquid

[ We claim:] [1.] In an implantable VAD including a pump, a compliance chamber normally disposed above said pump, and a tube connecting said pump and said compliance chamber in liquid and gaseous communication,the improvement comprising:(A) said compliance chamber forming:(i) a reservoir for liquid extending from adjacent the bottom of said compliance chamber upwardly towards the top of said compliance chamber; and(ii) a chamber for gas disposed above said liquid reservoir and extending upwardly to the top of said compliance chamber, said gas chamber being in gaseous communication with said pump via said tube;(B) a subcutaneous access port in liquid and gaseous communication with said liquid reservoir for introducing make-up gas into or removing excess gas from said gas chamber via said liquid reservoir and for removing accumulated liquid from said liquid reservoir; and(C) conduit means connecting said port and said liquid reservoir in liquid and gaseous communication.