发明名称 |
Stepped catheters with flow restrictors and infusion systems using the same |
摘要 |
A stepped catheter comprising a distal portion of smaller diameter than a proximal portion, wherein the distal portion defines a flow aperture configured to deliver fluid passing through the catheter from the proximal portion to the flow aperture. The catheter may include a flow restrictor located within a lumen of the catheter at or near the flow aperture. A filter element may also be included and located within the lumen of the catheter at a location upstream of the flow restrictor. |
申请公布号 |
US9539382(B2) |
申请公布日期 |
2017.01.10 |
申请号 |
US201313795539 |
申请日期 |
2013.03.12 |
申请人 |
Medtronic, Inc. |
发明人 |
Nelson Brian D. |
分类号 |
A61M5/14;A61M25/00;A61M5/142 |
主分类号 |
A61M5/14 |
代理机构 |
Mueting, Raasch & Gebhardt, P.A. |
代理人 |
Mueting, Raasch & Gebhardt, P.A. |
主权项 |
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. |
地址 |
Minneapolis MN US |