US 12,233,258 B2
Medical lead and implantation
Randy W. Westlund, River Falls, WI (US); and Mark C. Lynn, Circle Pines, MN (US)
Assigned to ZOLL RESPICARDIA, INC., Minnetonka, MN (US)
Filed by ZOLL RESPICARDIA, INC., Minnetonka, MN (US)
Filed on Oct. 30, 2020, as Appl. No. 17/085,847.
Application 17/085,847 is a continuation of application No. 15/663,022, filed on Jul. 28, 2017, granted, now 10,821,280.
Application 15/663,022 is a continuation of application No. 13/049,520, filed on Mar. 16, 2011, granted, now 9,744,349, issued on Aug. 29, 2017.
Claims priority of provisional application 61/441,559, filed on Feb. 10, 2011.
Prior Publication US 2021/0046303 A1, Feb. 18, 2021
Int. Cl. A61M 25/00 (2006.01); A61M 25/06 (2006.01); A61N 1/05 (2006.01); A61B 17/34 (2006.01); A61M 29/00 (2006.01)
CPC A61N 1/056 (2013.01) [A61M 25/0041 (2013.01); A61M 25/0054 (2013.01); A61M 25/0068 (2013.01); A61M 25/0662 (2013.01); A61B 17/3468 (2013.01); A61M 2025/0081 (2013.01); A61M 25/0668 (2013.01); A61M 29/00 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A catheter system comprising:
a catheter comprising:
a catheter body defining a first lumen, the catheter body having a proximal end of the catheter body and a distal end of the catheter body, wherein the catheter body has a first catheter body stiffness along a proximal portion and transitions to at least one less stiff second catheter body stiffness at at least one transition point 0.5 cm from the distal end of the catheter body; and
a catheter dilator configured to slidably move within the first lumen of the catheter body and having a second lumen configured to accept insertion of a guide wire, wherein the catheter dilator has a proximal end of the catheter dilator and a distal end of the catheter dilator, wherein the catheter dilator comprises a catheter dilator body having a first catheter dilator body stiffness proximate the proximal end of the catheter dilator and a second catheter dilator body stiffness proximate the distal end of the catheter dilator, and wherein the second catheter dilator body stiffness is less that the first catheter dilator body stiffness.