US 11,986,610 B2
Needle assemblies and related methods
Meng Mun Chong, Penang (MY)
Assigned to B. Braun Melsungen AG, Melsungen (DE)
Appl. No. 16/323,389
Filed by B. Braun Melsungen AG, Melsungen (DE)
PCT Filed Aug. 18, 2017, PCT No. PCT/EP2017/070941
§ 371(c)(1), (2) Date Feb. 5, 2019,
PCT Pub. No. WO2018/033628, PCT Pub. Date Feb. 22, 2018.
Claims priority of provisional application 62/377,307, filed on Aug. 19, 2016.
Prior Publication US 2021/0138200 A1, May 13, 2021
Int. Cl. A61M 25/06 (2006.01); A61L 29/08 (2006.01); A61M 25/00 (2006.01); A61M 39/24 (2006.01)
CPC A61M 25/0606 (2013.01) [A61L 29/085 (2013.01); A61M 25/0014 (2013.01); A61M 25/0043 (2013.01); A61M 25/0097 (2013.01); A61M 39/24 (2013.01); A61M 2025/0059 (2013.01); A61M 25/0618 (2013.01); A61M 25/0693 (2013.01); A61M 2205/0238 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A catheter assembly comprising:
a catheter hub having a hub body defining an interior cavity;
a bushing disposed at least in part in the interior cavity, the bushing comprising a tapered seat and an elongated seat, the tapered seat having a proximal end that is wider than a distal end having the elongated seat extending therefrom, the elongated seat having a tubular structure defining a bore and having a portion extending out a distal end of the catheter hub, said elongated seat comprising a first bushing half and a second bushing half located on different sides of a plane extending lengthwise of a diameter of the bushing;
a catheter tube being formed from a single material and having an exterior surface and an interior surface defining a lumen that extends from a proximal opening at a proximal end to a distal opening at a distal end such that the exterior surface of the single material is at both the proximal opening and the distal opening, the catheter tube sleeved over the elongated seat of the bushing including over the portion that extends out the distal end of the catheter hub such that the interior surface at the proximal end of the catheter tube is directly pressed against an exterior of the bushing and the exterior surface at the proximal end of the catheter tube is directly pressed against an interior surface of the catheter hub;
a needle hub with a needle comprising a needle shaft having a needle lumen and a needle tip, the needle shaft projecting through the elongated seat of the bushing and out the distal opening at the distal end of the catheter tube in a ready to use position;
wherein the elongated seat is bendable to form at least one curve along a length thereof to prevent kinking in the catheter tube, the at least one curve having a minimum bend radius when a first surface of the first bushing half of the elongated seat is extended and a second surface of the second bushing half of the elongated seat is shortened.