US 12,201,340 B2
Spray nozzle design for a catheter
Jean-Pierre Lalonde, Candiac (CA); Wlodzimierz V. Sadzynski, Chateauguay (CA); and Nicolas Coulombe, Anjou (CA)
Assigned to Medtronic CryoCath LP, Toronto (CA)
Filed by Medtronic CryoCath LP, Toronto (CA)
Filed on Sep. 15, 2021, as Appl. No. 17/476,010.
Application 15/922,441 is a division of application No. 15/240,589, filed on Aug. 18, 2016, granted, now 9,936,999, issued on Apr. 10, 2018.
Application 15/240,589 is a division of application No. 13/071,594, filed on Mar. 25, 2011, granted, now 9,439,707, issued on Sep. 13, 2016.
Application 17/476,010 is a continuation in part of application No. 15/922,441, filed on Mar. 15, 2018, granted, now 11,259,857.
Prior Publication US 2022/0000533 A1, Jan. 6, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 18/02 (2006.01); A61B 18/00 (2006.01)
CPC A61B 18/02 (2013.01) [A61B 2018/0022 (2013.01); A61B 2018/00255 (2013.01); A61B 2018/00351 (2013.01); A61B 2018/00577 (2013.01); A61B 2018/0212 (2013.01); A61B 2018/0262 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A cryoablation device, comprising:
an expandable element defining a chamber;
an injection tube in fluid communication with the chamber, the injection tube having a proximal portion couplable to a source of cryoablation fluid and a distal portion within the chamber, the distal portion of the injection tube including a terminal distal portion with a nozzle;
the nozzle defining a lumen having an inlet section, an exhaust expansion section opposite the inlet section, and a throat disposed therebetween, the lumen defining a fluid flow path between the inlet section and the exhaust expansion section;
the inlet section and the exhaust expansion section each converging inwards towards the throat and having a diameter that is larger than a diameter of the throat; and
a fluid dispersion unit surrounding at least a portion of the distal portion of the injection tube and having a longitudinal axis, the nozzle of the injection tube being located within the fluid dispersion unit and being configured to direct a flow of fluid into the fluid dispersion unit.