Patent ID: 9539382
Date: 2017-01-10
CPC Classifications: A61M

Claim:
1. A catheter assembly, comprising: a tubular catheter body having proximal and distal ends, the body comprising an inner surface defining a body lumen extending between the proximal and distal ends; a tubular needle comprising a proximal portion fixed relative to the catheter body and located within the body lumen, and a protruding portion extending distally beyond the distal end of the catheter body, wherein the needle further comprises: an outer surface having a diameter that is less than a diameter of an outer surface of the catheter body; and an inner surface defining a needle lumen in fluid communication with the body lumen, wherein a flow aperture in fluid communication with the needle lumen is provided along the protruding portion at or near a distal end of the needle; a flow restrictor located within the needle lumen and fixed in position relative to the needle, the flow restrictor comprising a distal end positioned at or near the flow aperture; a filter element positioned within the body lumen at or near a proximal end of the flow restrictor; and a tubular sleeve positioned between the flow restrictor and the filter element.