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US 9,956,380 B2Granted
Blood cannula
Assigneeenmodes GmbH
InventorsTim Kaufmann, Ulrich Steinseifer, Anton Moritz
Life of this patent
Estimating the term…
Abstract
The invention relates to a blood cannula for discharging blood into a vessel, in particular aortic cannula for discharging blood into an aortic arch during heart-bypass surgery, comprising a tubular body (1), the tubular body having a straight part at the proximal end (2) and a bent part at the distal end (3) leading into an outlet opening (5), wherein the distal end (3), in particular the bent part has an increasing cross section in the direction of blood flow (B).
Claims11
A blood cannula for discharging blood into a vessel during heart-bypass surgery, the cannula comprising:
- a tubular body having a straight part at a proximal end and a bent part at a distal end leading into an outlet opening, the bent part having an increasing cross section in a direction of blood flow through the cannula;
- and
- a helical wall extending in the direction of blood flow on an inner surface of the straight part, a height of the helical wall measured between an inner surface of the tubular body and an apex of the wall increasing in the direction of blood flow in a beginning of its extension starting with a height of zero, the wall having an area of decreasing height in the direction of blood flow so as to form an area of extension in the direction of blood flow in which a spacing between the apex of the wall and a geometric center of the straight part in the straight part of the tubular body is constant.
Dependencies are inferred from the claim text.