US 11,744,997 B2
Introducer needle with notches for improved flashback
Weston F. Harding, Lehi, UT (US)
Assigned to Becton, Dickinson and Company, Franklin Lakes, NJ (US)
Filed by Becton, Dickinson and Company, Franklin Lakes, NJ (US)
Filed on Apr. 12, 2022, as Appl. No. 17/718,587.
Application 17/718,587 is a continuation of application No. 16/725,704, filed on Dec. 23, 2019, granted, now 11,324,926.
Application 16/725,704 is a continuation in part of application No. 15/946,593, filed on Apr. 5, 2018, granted, now 10,869,993, issued on Dec. 22, 2020.
Prior Publication US 2022/0233823 A1, Jul. 28, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 25/06 (2006.01)
CPC A61M 25/0606 (2013.01) [A61M 25/0693 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A catheter system, comprising:
a catheter adapter, comprising a distal end, a proximal end, a lumen extending between the distal end and the proximal end, and a side port disposed between the distal end and the proximal end and in fluid communication with the lumen;
a catheter extending distally from the distal end of the catheter adapter;
an introducer needle having a wall defining a needle lumen of the introducer needle, a first notch formed through the wall, and a second notch formed through the wall, wherein the second notch is proximal to the first notch, wherein the introducer needle extends through the catheter and beyond the distal end of the catheter when the introducer needle is in an insertion position for insertion into a patient, wherein a portion of the introducer needle between the first notch and the second notch is blocked such that fluid is prevented from flowing in the needle lumen between the first notch and the second notch; and
a seal element is disposed proximal to the second notch and distal to the side port, wherein the seal element is configured to prevent a priming fluid from travelling distal to the seal element between an outer surface of the introducer needle and an inner surface of the catheter.