US 11,806,491 B2
Methods and devices for treating sinusitis
Paul Lesch, Lino Lakes, MN (US); Aaron Piddie, Bloomington, MN (US); Peter T. Keith, Lanesboro, MN (US); Anthony J. Hanson, Chaska, MN (US); and John R. Drontle, Buffalo, MN (US)
Assigned to Entellus Medical, Inc., Maple Grove, MN (US)
Filed by ENTELLUS MEDICAL, INC., Maple Grove, MN (US)
Filed on Dec. 3, 2020, as Appl. No. 17/111,104.
Application 16/111,077 is a division of application No. 15/049,800, filed on Feb. 22, 2016, granted, now 10,086,181, issued on Oct. 2, 2018.
Application 17/111,104 is a continuation of application No. 16/111,077, filed on Aug. 23, 2018, granted, now 10,881,843.
Application 15/049,800 is a continuation of application No. 13/674,734, filed on Nov. 12, 2012, granted, now 9,283,360, issued on Mar. 15, 2016.
Claims priority of provisional application 61/558,142, filed on Nov. 10, 2011.
Prior Publication US 2021/0085938 A1, Mar. 25, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 29/02 (2006.01); A61B 17/24 (2006.01)
CPC A61M 29/02 (2013.01) [A61B 17/24 (2013.01); A61M 2029/025 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A balloon dilation device, comprising
an inner guide member defining a first lumen;
a sleeve member defining a second lumen, wherein the inner guide member is at least partially disposed within the second lumen, wherein the sleeve member comprises a balloon;
a rounded tip member coupled to a distal end of a wire that extends through the first lumen of the inner guide member, wherein the rounded tip member is disposed at a position that is distal to a distal tip of the sleeve member and a distal tip of the inner guide member;
a balloon advancement member configured to advance the sleeve member along the inner guide member; and
a spring that is coupled at one end to a proximal end of the wire, wherein the spring is configured to provide a force urging the rounded tip member in a proximal direction,
wherein at least a portion of the balloon is configured to advance off the distal tip of the inner guide member.