US 12,274,835 B2
Extended dwell and midline catheters and related methods
Teng Lip Khoo, Pulau Pinang (MY); and Lilian Zhi Ling Lew, Penang (MY)
Assigned to B. Braun Melsungen AG, Melsungen (DE)
Appl. No. 17/296,912
Filed by B. Braun Melsungen AG, Melsungen (DE)
PCT Filed Nov. 28, 2019, PCT No. PCT/EP2019/082867
§ 371(c)(1), (2) Date May 25, 2021,
PCT Pub. No. WO2020/109448, PCT Pub. Date Jun. 4, 2020.
Claims priority of provisional application 62/772,195, filed on Nov. 28, 2018.
Prior Publication US 2022/0032008 A1, Feb. 3, 2022
Int. Cl. A61M 25/01 (2006.01); A61M 25/00 (2006.01); A61M 25/06 (2006.01); A61M 25/09 (2006.01)
CPC A61M 25/0113 (2013.01) [A61M 25/0014 (2013.01); A61M 25/0606 (2013.01); A61M 25/09041 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A catheter assembly comprising:
a housing having a plurality of walls including two spaced apart sidewalls;
a catheter hub located within the housing;
a catheter tube coupled to the catheter hub, the catheter tube defining a catheter axis;
a needle having a needle tip projecting through the catheter tube with the needle tip exposed at a distal end of the catheter tube; and
a catheter activation device comprising a first push tag having a surface for pushing to move the catheter hub relative to the housing and a second push tag having a surface for pushing to move the catheter hub relative to the housing,
wherein the first and second push tags are movable with one another to move the catheter hub from a first position to a second position within the housing and the first and second push tags are movable relative to one another for moving the catheter hub from the second position to a third position; and
wherein the first and second push tags are spaced from one another a first distance in the first position, in which the second push tag is inaccessible for pushing, and the first and second push tags are spaced from one another a second distance in the second position, which differs from the first distance and in which the second push tag is accessible for pushing.
 
18. A method of assembling a catheter assembly, the method comprising:
assembling a catheter activation device comprising a first push tag having a surface and a second push tag having a surface to a housing, said housing having spaced apart sidewalls;
placing a catheter hub in sliding communication with the first push tag and the second push tag;
coupling a catheter tube to the catheter hub;
projecting a needle through the catheter tube;
further comprising mounting the second push tag in sliding communication with groove rails located on sidewalls of the first push tag; and
wherein the first push tag and the second push tag are movable with one another to move the catheter hub from a first position to a second position and the first push tag and the second push tag are movable relative to one another to move the catheter hub from the second position to a third position.
 
22. A method of assembling a catheter assembly, the method comprising:
assembling a catheter activation device comprising a first push tag having a surface and a second push tag having a surface to a housing, said housing having spaced apart sidewalls;
placing a catheter hub in sliding communication with the first push tag and the second push tag;
coupling a catheter tube to the catheter hub;
projecting a needle through the catheter tube;
mounting the needle to a retention block and projecting a guidewire through the retention block and through the needle; and
wherein the first push tag and the second push tag are movable with one another to move the catheter hub from a first position to a second position and the first push tag and the second push tag are movable relative to one another to move the catheter hub from the second position to a third position.