US 12,005,228 B2
Systems and methods for correcting and preventing occlusion in a catheter
Gidon Ofek, Honolulu, HI (US); Jay A. Muse, Salt Lake City, UT (US); Bret Hamatake, Grantsville, UT (US); and Garrick T. Smith, Bountiful, UT (US)
Assigned to C. R. Bard, Inc., Franklin Lakes, NJ (US)
Filed by C. R. Bard, Inc., Murray Hill, NJ (US)
Filed on Jun. 10, 2019, as Appl. No. 16/436,726.
Application 16/436,726 is a continuation of application No. 15/619,219, filed on Jun. 9, 2017, granted, now 10,322,230, issued on Jun. 18, 2019.
Claims priority of provisional application 62/348,082, filed on Jun. 9, 2016.
Prior Publication US 2019/0290838 A1, Sep. 26, 2019
Int. Cl. A61M 25/00 (2006.01); A61M 1/00 (2006.01); A61M 1/36 (2006.01); A61M 5/145 (2006.01); A61M 39/22 (2006.01); A61M 5/14 (2006.01); A61M 5/158 (2006.01); A61M 5/168 (2006.01)
CPC A61M 5/1452 (2013.01) [A61M 1/3659 (2014.02); A61M 1/772 (2021.05); A61M 1/80 (2021.05); A61M 25/00 (2013.01); A61M 39/225 (2013.01); A61M 2005/1403 (2013.01); A61M 2005/1588 (2013.01); A61M 2005/16863 (2013.01); A61M 2025/0019 (2013.01); A61M 2205/3344 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A catheter assembly, comprising:
a catheter including a lumen; and
a patency device connectable to the catheter, the patency device comprising:
a fluid reservoir designed to be placed in fluid communication with the lumen;
a positive pressure input portion having a distal end connected to the fluid reservoir, designed to provide at least one impulse of positive pressure to a fluid disposed within the lumen;
an interface portion including a proximal end coupled to the fluid reservoir and a distal end coupled to the lumen;
a normally closed two-way valve coupled in line between the fluid reservoir and the lumen; and
a negative pressure input portion operably connected to a fluid outlet of the normally closed two-way valve.