Infusion fluid delivery device and ventricular assist system

Abstract

The application relates to a perfusion liquid conveying device and a ventricular assist system. The perfusion liquid conveying device comprises a base, a rotating shaft, a bearing assembly and a buffer assembly, the base is internally provided with a perfusion channel, the bearing assembly comprises a plurality of bearings, the inner ring and the outer ring of the bearing have a flow gap therebetween, the buffer assembly is provided with a reflux cavity, the perfusion channel is an inflow channel of perfusion liquid, the perfusion liquid mixes with refluxed blood in the perfusion channel to form mixed liquid, the mixed liquid passes through the flow gap and the reflux cavity to be refluxed, part of the reflux cavity extends in the axial direction, and part of the reflux cavity extends in a first direction. The reflux cavity itself constitutes a zigzag loop, the reflux cavity can form a buffering effect on the mixed liquid, the flow of the mixed liquid in the perfusion liquid conveying device is inhibited, thereby the reflux of blood to the perfusion liquid conveying device is inhibited, the structural damage problem of the perfusion liquid conveying device caused by the reflux of blood is improved, and the working reliability of the perfusion liquid conveying device is improved.

Images