US 11,806,489 B2
Balloon catheter inflation apparatus and methods
Paul R. Lesch, Jr., Lino Lakes, MN (US); Paul A. Vajgrt, Saint Michael, MN (US); and Timothy B. Petrick, Brooklyn Park, MN (US)
Assigned to Entellus Medical, Inc., Maple Grove, MN (US)
Filed by ENTELLUS MEDICAL, INC., Maple Grove, MN (US)
Filed on Mar. 18, 2021, as Appl. No. 17/205,912.
Application 17/205,912 is a continuation of application No. 16/247,433, filed on Jan. 14, 2019, granted, now 10,967,155.
Application 16/247,433 is a continuation of application No. 15/642,616, filed on Jul. 6, 2017, granted, now 10,201,684, issued on Feb. 12, 2019.
Application 15/642,616 is a continuation of application No. 14/796,948, filed on Jul. 10, 2015, granted, now 9,700,705, issued on Jul. 11, 2017.
Application 14/796,948 is a continuation of application No. 12/372,691, filed on Feb. 17, 2009, granted, now 9,101,739, issued on Aug. 11, 2015.
Prior Publication US 2021/0322734 A1, Oct. 21, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 25/10 (2013.01); A61M 39/22 (2006.01); A61M 39/12 (2006.01); A61M 29/02 (2006.01); A61B 17/24 (2006.01); A61M 39/10 (2006.01)
CPC A61M 25/10182 (2013.11) [A61B 17/24 (2013.01); A61M 25/1018 (2013.01); A61M 25/10185 (2013.11); A61M 25/10187 (2013.11); A61M 29/02 (2013.01); A61M 39/12 (2013.01); A61M 39/22 (2013.01); A61M 2039/1033 (2013.01); A61M 2210/0618 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of using an inflation device, comprising:
filling an inflation device with a fluid, wherein the inflation device comprises:
a syringe body having a bore that extends between a proximal end and a distal end, wherein the bore holds the fluid responsive to filling the inflation device with the fluid,
a plunger assembly that is slidable in the bore of the syringe body, wherein the plunger assembly comprises a shaft having a sealing member configured to form a fluid tight seal with the syringe body,
a distal connector disposed at the distal end of the syringe body, wherein the distal connector comprises an aperture that is configured for passage of the fluid,
a fluid bypass channel disposed in the distal end of the syringe body and fluidically coupled to the aperture of the distal connector; and
a shut-off valve coaxially disposed in the bore of the syringe body, wherein the shut-off valve comprises a spring-biased moveable piston having a bypass lumen;
moving the plunger assembly relative to the syringe body, wherein moving the plunger assembly relative to the syringe body comprises:
responsive to a pressure of the fluid being less than a threshold value, forming, by the bypass lumen, a fluid path between the bore and the fluid bypass channel in the syringe body, wherein the fluid bypass channel is formed between an exterior surface of the shut-off valve and an interior surface of the bore of the syringe body, and
responsive to the pressure of the fluid being greater than the threshold value, interrupting the fluid path between the bore and the fluid bypass channel.