US 12,337,123 B2
Safety intravenous cannula
Neeraj Gupta, Gurgaon (IN); Calvin Todd Fagley, Excelsior, MN (US); and Rachel Ann Sender, Eden Prairie, MN (US)
Assigned to MedSource Labs, LLC, Chanhassen, MN (US)
Filed by MedSource Labs, LLC, Chanhassen, MN (US)
Filed on Dec. 15, 2021, as Appl. No. 17/551,255.
Claims priority of application No. 202111020693 (IN), filed on May 6, 2021.
Prior Publication US 2022/0355072 A1, Nov. 10, 2022
Int. Cl. A61M 25/00 (2006.01); A61M 25/06 (2006.01)
CPC A61M 25/0097 (2013.01) [A61M 25/0043 (2013.01); A61M 25/0625 (2013.01); A61M 25/0662 (2013.01); A61M 2205/02 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A safety intravenous cannula, comprising:
a catheter assembly comprising a catheter hub, the catheter hub having a distal end connected to a proximal end of a catheter tube, and a body member having a cylindrical portion along the catheter hub;
an elongated tubular member disposed at a proximal end of the catheter assembly;
a needle hub comprising a needle holder disposed inside the elongated tubular member, wherein a distal end of the needle holder is connected with a needle;
a safety device having a proximal portion fixedly connected to a distal end of the elongated tubular member and releasably connected to the body member of the catheter assembly,
wherein the body member is provided with an annular groove at an inner surface of the body member, and
wherein the safety device comprises one or more locking elements,
wherein the one or more locking elements of the safety device are adapted to engage with the annular groove of the body member, thereby forming a locking engagement and a tight fit relationship between the elongated tubular member and the catheter assembly when the needle is passed through the safety device for puncturing a vein of a patient, and
wherein when the needle is retracted from the catheter assembly after puncturing the vein of the patient, the body member which is in a tight fit relationship with the catheter assembly is disengaged by disengaging the one or more locking elements from the annular groove, thereby disengaging the locking engagement between the elongated tubular member and the catheter assembly, and separating the safety device from the body member of the catheter assembly, the needle being adapted to be arrested within the safety device.