Extrapleural airway device and method
View Patent ↗This is directed to improving the gaseous exchange in a lung of an individual and particularly, this is directed to improving the gaseous exchange in individuals having chronic obstructive pulmonary disease. It generally includes fluidly connecting the lung to an extrapleural airway such as the trachea. In one variation, a conduit is deployed to place the lung and the trachea in fluid communication which allows trapped oxygen-reduced air to pass directly out of the lung and into the trachea. Removing nonfunctional air from the lung tends to improve the gaseous exchange of oxygen into the blood and decompress hyper-inflated lungs. Sealant and biocompatible adhesives may be provided on the exterior of the conduit to prevent side flow, leaks and to otherwise prevent air from entering spaces not intended to receive air such as the pleura space.
1. A method for altering the gaseous flow pathways within a lung such that gas may pass directly from lung parenchyma to an airway that is located outside of a pleura surrounding the lung, said method comprising:
advancing a device into a portion of said airway that is outside of the pleura;
creating an opening in said airway outside of the pleura with the device;
fluidly coupling said lung parenchyma to the airway through the pleura such that gas may pass directly from the lung parenchyma to the airway and outside of the body wherein the step of fluidly coupling comprises installing a conduit between said lung parenchyma and said airway, said conduit comprising a passageway for gas to flow through.
2. The method of claim 1 wherein said opening is created using one device selected from the group consisting of a mechanical member and a radio frequency energy delivering device.
3. The method of claim 1 , wherein said conduit comprises a first portion, second portion and a center section between said first portion and said second portion, said first portion and said second portion being adapted to secure said conduit to said lung pleura and said airway.
4. The method of claim 3 wherein each of said first portion and second portion of said conduit comprises a plurality of extension members which are deflectable such that when said conduit is deployed, said extension members from said first portion substantially oppose said extension members from said second portion such that tissue may be sandwiched therebetween.
5. The method of claim 3 wherein said center section has a length in the range of 0.5 to 50 mm.
6. The method of claim 5 wherein the center section has a length Of 1 mm.
7. The method of claim 4 wherein the extension members form right angles when deployed.
8. The method of claim 4 wherein the extension members form angles between 90 and 135 degrees when deployed.
9. The method of claim 1 , further comprising providing a sealant to an exterior surface of the conduit to prevent side flow of gas around the conduit.
10. The method of claim 9 wherein said sealant comprises talc.
11. The method of claim 9 wherein said sealant is fibrin glue.
12. The method of claim 9 wherein said sealant comprises cyanoacrylate.
13. The method of claim 1 , wherein the conduit includes a biocompatible coating.
14. The method of claim 13 wherein said coating promotes wound healing.
15. The method of claim 1 , further comprising deploying at least one intrapleural conduit to maintain a channel surgically created in an intrapleural airway.
16. The method of claim 1 , further comprising detecting blood vessels prior to said step of creating.
17. The method of claim 1 , wherein said conduit comprises at least one visualization feature on an exterior surface of said conduit.
18. The method of claim 1 , wherein said step of fluidly coupling comprises creating a channel extending through said pleura and into said lung parenchyma.
19. The method of claim 1 , further comprising fixing a wall of said airway to a wall of said pleura.
20. The method of claim 19 wherein said creating step is performed subsequent to said fixing said airway wall to said pleura wall.
21. The method of claim 20 wherein said lung wall is the visceral pleura.
22. The method of claim 1 , where the airway comprises an extra-pleural airway.
23. The method of claim 22 , where the extra-pleural airway comprises an airway selected from the trachea or mainstem bronchus.
24. The method of claim 1 , wherein the gas may pass directly from the lung parenchyma, to the airway, through a natural respiratory opening, and outside of the body.