US 12,453,844 B2
Devices and methods for bile duct surgery
Jeffrey Justin Rentz, Billings, MT (US)
Assigned to JMT Medical, Inc., Billings, MT (US)
Filed by JMT Medical, Inc., Billings, MT (US)
Filed on Sep. 20, 2024, as Appl. No. 18/892,020.
Claims priority of provisional application 63/669,672, filed on Jul. 10, 2024.
Claims priority of provisional application 63/584,788, filed on Sep. 22, 2023.
Prior Publication US 2025/0235335 A1, Jul. 24, 2025
Int. Cl. A61F 2/04 (2013.01); A61F 2/82 (2013.01); A61F 2/962 (2013.01); A61M 31/00 (2006.01); A61M 39/02 (2006.01); A61M 25/09 (2006.01)
CPC A61M 31/005 (2013.01) [A61F 2/04 (2013.01); A61F 2/82 (2013.01); A61F 2/962 (2013.01); A61M 39/0247 (2013.01); A61F 2002/041 (2013.01); A61F 2230/0069 (2013.01); A61F 2230/0091 (2013.01); A61F 2250/0067 (2013.01); A61M 2025/09183 (2013.01); A61M 2039/0255 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A biliary stent, comprising:
a tubular body having a proximal portion with a proximal end and a distal portion with a distal end;
wherein the tubular body is deformable between a tensioned linear delivery configuration and an expanded helical deployment configuration;
wherein the tubular body comprises a polymeric material having a Young's modulus that is effective to
(a) exert a frictional force on an antegrade delivery device in the tensioned linear delivery configuration to so retain the tubular body on the delivery device; and
(b) exert a radially expansive force on an inner wall of a bile duct in the expanded helical deployment configuration to radially expand the inner wall of the bile duct so retain the tubular body in the bile duct;
a plurality of fenestrations in the tubular body;
wherein a spring constant for radial expansion of the biliary stent is between 1,000 N/m and 10,000 N/m, and/or wherein a spring constant for radial expansion of the bile duct is between 15,000 N/m and 30,000 N/m; and
wherein the stent, in the helical deployment configuration, forms a composite fluid path comprising an intrahelical fluid path and an intratubular fluid path.