US 12,376,979 B2
Medical cannulae, delivery systems and methods
Joshua Frye Krieger, Bloomington, IN (US); and Melissa Lonn, Lafayette, IN (US)
Assigned to Cook Medical Technologies LLC, Bloomington, IN (US)
Filed by Cook Medical Technologies LLC, Bloomington, IN (US)
Filed on Dec. 12, 2022, as Appl. No. 18/079,500.
Application 18/079,500 is a continuation of application No. 16/450,070, filed on Jun. 24, 2019, granted, now 11,523,924.
Application 16/450,070 is a continuation of application No. 15/140,028, filed on Apr. 27, 2016, granted, now 10,327,933, issued on Jun. 25, 2019.
Claims priority of provisional application 62/153,814, filed on Apr. 28, 2015.
Prior Publication US 2023/0115266 A1, Apr. 13, 2023
Int. Cl. A61F 2/966 (2013.01); A61B 17/00 (2006.01); A61B 17/34 (2006.01); A61M 25/00 (2006.01); A61M 25/01 (2006.01); A61F 2/95 (2013.01)
CPC A61F 2/966 (2013.01) [A61B 17/00234 (2013.01); A61B 17/3421 (2013.01); A61B 17/3468 (2013.01); A61M 25/0013 (2013.01); A61M 25/0054 (2013.01); A61M 25/0138 (2013.01); A61B 2017/00309 (2013.01); A61B 2017/00336 (2013.01); A61F 2/95 (2013.01); A61F 2250/0018 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A medical cannula, comprising:
an elongate tubular member having a lengthwise axis and a circumferential wall extending between a proximal end and a distal end and defining an interior lumen, the circumferential wall having an outer circumferential surface defining a pattern of openings comprising a plurality of openings arranged in an interrupted spiral that extends circumferentially along the elongate tubular member, each opening of the plurality of openings having a first end that is curved, a first portion of the circumferential wall disposed between immediately adjacent openings within a first revolution of the interrupted spiral, a second portion of the circumferential wall disposed between immediately adjacent openings within a second revolution of the interrupted spiral, the first portion having a first circumferential length along the elongate tubular member, the second portion having a second circumferential length along the elongate tubular member that is different than the first circumferential length; and
an outer member disposed circumferentially about the elongate tubular member; wherein a third portion of the circumferential wall is disposed between a first pair of immediately adjacent revolutions of the interrupted spiral, the third portion having a first axial length along the lengthwise axis of the elongate tubular member; and wherein a fourth portion of the circumferential wall is disposed between a second pair of immediately adjacent revolutions of the interrupted spiral, the fourth portion having a second axial length along the lengthwise axis of the elongate tubular member that is different than the first axial length.