Elongated lung volume reduction devices, methods, and systems
View Patent ↗A lung volume reduction system is disclosed comprising an elongate implantable device adapted to be delivered to a lung airway of a patient in a delivery configuration and to change to a deployed configuration to compress lung tissue. The implant may be longer in axial length than an axial length of the target axial region in which it is deployed. Deployment may involve allowing an end of the implant to move relative to surrounding tissue while the implant is progressively deployed.
1. A system for treating a lung of a patient, the lung including an airway system having a plurality of branching airways and a target airway, the system comprising:
a catheter having a proximal end and a distal end with a lumen therebetween, the distal end of the catheter advanceable through the airway system;
an implant receivable by the lumen, the implant comprising an elongate body having a distal portion and a proximal portion adjacent a proximal end of the implant, the distal portion biased to bend so that retraction of the distal end of the catheter relative to the distal portion of the implant releases the distal portion to bend and engage the target airway with the bent distal portion while the proximal portion remains within the catheter, the proximal end of the implant advanceable distally relative to the airway while the catheter is withdrawn proximally from the proximal portion of the implant; and
an elongate measurement body extendable distally along the catheter.
2. The system of claim 1 , wherein the catheter comprises a bronchoscope.
3. The system of claim 1 , wherein the implant has a length of over 110 mm.
4. The system of claim 3 , wherein the implant has a length in a range from about 120 mm to about 250 mm.
5. The system of claim 1 , wherein the distal movement of the proximal end of the implant relative to the airway while the catheter is withdrawn proximally from the proximal portion of the implant reduces axial loads between the implant and the airway.
6. The system of claim 1 , wherein the target airway has a length and wherein a length of the elongate body of the implant is at least 20% longer than the target airway length.
7. The system of claim 1 , wherein the elongate measurement body has indicia of a distal length of the measurement body suitable for selecting a length of the elongate body of the implant.
8. The system of claim 1 , further comprising a plurality of alternatively selectable implants, each implant comprising an elongate body and being releasable toward a bent configuration so as to limit strain of the elongate body during storage, each implant being loadable into the catheter by straightening the associated elongate body toward the axis and inserting the elongate body into the lumen so that the catheter maintains the elongate body in a delivery configuration.
9. The system of claim 8 , further comprising a loading cartridge having a proximal end and a distal end, the loading cartridge releaseably receiving a selected elongate body from among the plurality of elongate bodies, the loading cartridge being coupleable to the catheter body so that the selected elongate body is advanceable from within the loading cartridge distally into the lumen of the catheter.
10. The system of claim 9 , wherein the distal end of the loading cartridge is affixable to a proximal hub of the catheter so that a lumen of the loading cartridge extends to the lumen of the catheter, and further comprising a pusher axially movable within the loading cartridge and the catheter so as to push the elongate body from within the attached loading catheter to within the catheter, the pusher having a pusher surface distally engageable against the implant and a shaft extending proximally from the pusher surface to facilitate deployment of the implant from the distal end of the catheter.
11. The system of claim 1 , further comprising a grasper extending distally along the catheter, the grasper axially coupling the implant so as to facilitate retrieving the implant into the lumen of the catheter when the elongate body is distal of the catheter, the grasper articulatable from the proximal end of the catheter so as to release the elongate body.
12. The system of claim 11 , wherein tensioning the grasper proximally and pushing the catheter distally effects retrieving of the implant with the elongate body is distal of the catheter and the implant is axially coupled to the grasper, the catheter straightening the elongate body of the implant axially so as to facilitate withdrawing of the implant axially from the airway system.
13. The system of claim 1 , wherein a distal end of the implant and the proximal end of the implant are atraumatic.
14. A system for treating a lung of a patient, the lung including an airway system having a plurality of branching airways and a target airway, the system comprising:
a catheter having a proximal end and a distal end with a lumen therebetween, the distal end of the catheter advanceable through the airway system;
an implant receivable by the lumen, the implant comprising an elongate body having a distal portion and a proximal portion adjacent a proximal end of the implant, the distal portion biased to bend so that retraction of the distal end of the catheter relative to the distal portion of the implant releases the distal portion to bend and engage the target airway with the bent distal portion while the proximal portion remains within the catheter, the proximal end of the implant advanceable distally relative to the airway while the catheter is withdrawn proximally from the proximal portion of the implant;
an airway measurement device comprising an elongate body with indicia of length along the elongate body to provide a distal length from the distal end of the catheter to a distal end of the elongate body of the airway measurement device, the provided distal length suitable for selecting a length of the implant for delivery into the airway.
15. The system of claim 14 , wherein a distal end of the implant and the proximal end of the implant are atraumatic.