Devices and methods for stenting an airway

An implantable device to stent an airway at a bifurcation junction, the implantable device comprising:

• a proximal region having a cylindrical hollow tube shape defining a proximal portion of a non-bifurcated single lumen through the implantable device, the non-bifurcated single lumen extending axially along a longitudinal axis of the implantable device from a first opening at a proximal end of the implantable device to a second opening at a distal end of the implantable device;
• a distal region disposed at and extending from a distal end of the proximal region, the distal region flaring distally and outwardly from the proximal region to the second opening to define a distal portion of the non-bifurcated single lumen through the implantable device and to enlarge one or more diameters of the non-bifurcated single lumen at the second opening at the distal end of the implantable device, wherein a distal edge of the distal region includes a first notch at an anterior side and a second notch at a posterior side, wherein the first and second notches are configured to engage a cartilaginous ridge that runs anteroposteriorly between branches of an airway at a target bifurcation junction;
• wherein the second opening of the non-bifurcated single lumen of the implantable device, at the distal end of the distal region, has a transverse cross-section with an elliptical shape having a first diameter and a second diameter transverse to the first diameter, the first diameter being larger than the second diameter, larger than a diameter of the first opening at the proximal end of the implantable device, and larger than a diameter of a transverse cross-section of the non-bifurcated single lumen at a proximal end of the distal region and at the distal end of the proximal region.