Airway assembly and methods of using an airway assembly

• US 8,393,328 B2
• Filed: 12/28/2007
• Issued: 03/12/2013
• Est. Priority Date: 08/22/2003
• Status: Active Grant

• Current Assignee: Mermaid Medical Vascular ApS
• Original Assignee: Bio2 Medical Inc.
• Inventors: Angel, Luis F., Steinmetz, Jeffrey N.
• Primary Examiner(s): Ostrup, Clinton T
• Application Number:
  US11/966,767
• Publication Number:
  US 20080156323A1
• Time in Patent Office: 1,901 Days
• Field of Search: 128/207.14, 128/200.26, 128/202.27, 128/204.18, 128/207.18, 128/912, 600/120, 600/121, 606/108
• US Class Current: 128/207.14
• CPC Class Codes: A61M 16/04 Tracheal tubes catheters in general A61M25/00
• CPC Class Codes: A61M 16/0404 with means for selective or partial lung respiration
• CPC Class Codes: A61M 16/0434 Cuffs
• CPC Class Codes: A61M 16/0447 Bell, canopy or umbrella shaped
• CPC Class Codes: A61M 16/0459 one cuff behind another
• CPC Class Codes: A61M 16/0479 above the cuff, e.g. giving access to the upper trachea
• CPC Class Codes: A61M 16/0488 Mouthpieces; Means for guiding, securing or introducing the tubes guiding or introducing with laryngoscopes A61B1/267; holding devices on the body A61M25/02

Abstract

Many embodiments of an airway assembly and methods of using an airway assembly are disclosed. In one embodiment, an airway assembly includes an outer tube, an inner tube disposed coaxially with the outer tube, and a seal disposed on the inner tube. The seal is movable between a collapsed position and an expanded position where the seal engages an airway. Another embodiment is an airway assembly that includes an outer tube having a proximal portion and a distal portion, and an inner tube disposed coaxially with the outer tube. The inner tube has a proximal portion and a distal portion. The proximal portion of the outer tube has an outer diameter that is larger than an outer diameter of the distal portion of the outer tube.

Claims

1. An airway assembly insertable into an airway, the airway assembly comprising:

(a) an outer tube having walls and a central lumen;

(b) an inner tube having walls and a central lumen and being coaxially disposed within the central lumen of the outer tube; and

(c) a diametrically expansive seal positioned at a distal end of the inner tube and the diametrically expansive seal including at least one reinforcing member extending along the longitudinal length of the diametrically expansive seal, the diametrically expansive seal being movable between a collapsed position and an expanded position, whereby the at least one reinforcing member facilitates diametrically expansive movement of the diametrically expansive seal between the collapsed position and the expanded position, and where the diametrically expansive seal is adapted to sealingly seat against an anatomical airway passage;

wherein the inner tube and the outer tube have proximal portions and distal portions, and wherein outer diameters of the distal portions are smaller than outer diameters of the proximal portions.

2. The airway assembly as defined in claim 1, wherein the inner tube and the outer tube are coaxially movable relative to each other and the diametrically expansive seal diametrically expands and collapses in response to the relative coaxial movement of the inner tube and the outer tube.

3. The airway assembly as defined in claim 1, wherein the diametrically expansive seal further comprises a plurality of reinforcing members in a radially spaced apart relationship relative to adjacent reinforcing members and operably associated with the diametrically expansive seal that facilitates diametrically expansive movement of the diametrically expansive seal between the collapsed position and the expanded position and exerts a sealing pressure of the diametrically expansive seal for sealing against the airway sufficient to retard fluid from passing across the diametrically expansive seal.

4. The airway assembly as defined in claim 3, wherein the diametrically expansive seal further comprises a generally tubular member having walls, a proximal end fixedly coupled to the inner tube and an uncoupled distal end, wherein the walls and the distal end of the generally tubular member diametrically expand such that the distal end forms a diametrically enlarged distal opening adapted to sealingly seat against the airway and in fluid flow communication with the airway.

5. The airway assembly as defined in claim 4, wherein the proximal end of the diametrically expansive seal is coupled to a distal end of the inner tube and is in fluid flow communication with the central lumen of the inner tube.

6. The airway assembly as defined in claim 1, further comprising:

(d) an aperture disposed on the diametrically expansive seal, and wherein the aperture is fluidly connected with the inner tube to permit fluid flow between the inner tube and the aperture.

7. The airway assembly as defined in claim 1, further comprising:

d) a first position mark disposed on a wall surface of the inner tube; and

e) a second position mark disposed on a wall surface of the inner tube, wherein a proximal end of the outer tube is adjacent the first position mark when the diametrically expansive seal is in its collapsed position, and wherein the proximal end of the outer tube is adjacent the second position mark when the diametrically expansive seal is in the expanded position.

8. The airway assembly as defined in claim 7, further comprising:

(f) an aperture passing through a distal portion of the inner tube, and wherein the aperture is in an open position when the proximal end of the outer tube is adjacent the second position mark.

9. The airway assembly as defined in claim 1, further comprising:

(d) a second diametrically expansive seal operably associated with the inner tube, the second diametrically expansive seal being movable between a collapsed position and an expanded position where the second diametrically expansive seal engages the airway.

10. The airway assembly as defined in claim 9, further comprising:

(d) an aperture passing through a wall of the inner tube, wherein fluid flow through the aperture is permitted when the second diametrically expansive seal is in the expanded position and wherein fluid flow through the aperture is restricted when the second diametrically expansive seal is in the collapsed position.

11. The airway assembly as defined in claim 1, wherein the distal portions of the inner tube and outer tube have greater flexibility relative to the proximal portions of the inner tube and outer tube.

12. The airway assembly as defined in claim 1, wherein the outer tube further comprises a fluid flow port operably associated with the proximal portion of the outer tube and in fluid flow communication with the central lumen of the outer tube and external the outer tube.

13. The airway assembly as defined in claim 12, wherein the outer tube further comprises at least one aperture passing through a distal portion of the wall of the outer tube and in fluid flow communication between the central lumen of the outer tube and the fluid flow port.

14. The airway assembly as defined in claim 1, wherein the diametrically expansive seal further comprises at least one of a radiographic marker and a fluoroscopic marker.

15. The airway assembly as defined in claim 1, further comprising:

(d) a plurality of perforations passing through a distal portion of the outer tube and communicating with a space between the inner tube and the outer tube.

16. An airway assembly insertable into an airway, the airway assembly comprising:

a) an outer tube having a proximal portion and a distal portion;

b) an inner tube disposed coaxially with the outer tube, the inner tube having a proximal portion and a distal portion;

wherein the distal portion of the outer tube has an outer diameter smaller than an outer diameter of the proximal portion of the outer tube, and the distal portion of the inner tube has an outer diameter smaller than an outer diameter of the proximal portion of the inner tube; and

c) a generally tubular diametrically expansive seal coupled at its proximal end to the inner tube, the generally tubular diametrically expansive seal including at least one reinforcing member extending along the longitudinal length of the generally tubular diametrically expansive seal, at least one reinforcing member to facilitate diametrically expansive movement of the generally tubular diametrically expansive seal to an expanded outer diameter sufficient for sealingly engaging the airway and an open distal end in fluid flow communication with the airway.

17. The airway assembly as defined in claim 16, wherein the inner tube further comprises at least one aperture passing through a wall surface of the inner tube distally along a longitudinal length of the inner tube, the at least one aperture having an open position and a closed position depending on relative axial positions of the inner tube and the outer tube.

18. The airway assembly as defined in claim 17, further comprising an inflatable member operably disposed on a distal portion of the outer tube, the inflatable member being movable between a deflated position and an inflated position where the inflatable member sealingly engages the airway.

19. The airway assembly as defined in claim 18, wherein the inflatable member is positioned proximal the generally tubular diametrically expansive seal on the inner tube.

20. The airway assembly as defined in claim 19, wherein the at least one aperture is positioned proximal the generally tubular diametrically expansive seal.

21. The airway assembly as defined in claim 17, further comprising an inflatable member operably disposed on a distal portion of the inner tube, the inflatable member being moveable between a deflated position and an inflated position where the inflatable member sealingly engages the airway.

22. The airway assembly as defined in claim 21, wherein the at least one aperture is positioned proximal the inflatable member and distal a coupling between the proximal end of the generally tubular diametrically expansive seal and the inner tube.

23. The airway assembly as defined in claim 22, wherein the at least one aperture is positioned underneath the generally tubular diametrically expansive seal such that in the closed position of the at least one aperture the generally tubular diametrically expansive seal is in a collapsed position covering the at least one aperture and in the open position of the at least one aperture the generally tubular diametrically expansive seal is in an expanded position.

24. The airway assembly as defined in claim 16, wherein the inner tube is co-axially movable within a central lumen of the outer tube, and wherein the diametrically expansive seal moves between the collapsed position and the expanded position responsive to relative movement of the inner tube and the outer tube.

25. The airway assembly as defined in claim 24, wherein the generally tubular diametrically expansive seal comprises a first diametrically expansive seal coupled to a distal end of the inner tube and communicating with a central lumen of the inner tube and further comprises a second diametrically expansive seal positioned proximate the first diametrically expansive seal and coupled to the inner tube and at least one aperture passing through the inner tube and communicating with the central lumen of the inner tube, the at least one aperture being positioned underneath the second diametrically expansive seal such when the second diametrically expansive seal is in a collapsed position the at least one aperture is in a closed position and when the second diametrically expansive seal is in a diametrically expanded position, the at least one aperture is in a open position to communicate fluid flow to and from the airway through a space defined within the second diametrically expansive seal, through the at least one aperture and into the central lumen of the inner tube.

26. The airway assembly defined in claim 25, wherein the first diametrically expansive seal and the second diametrically expansive seal each further comprise at least one reinforcing member that facilitates diametrically expansive movement of the first diametrically expansive seal and the second diametrically expansive seal between the collapsed position and the expanded position and that exerts a sealing pressure of the first diametrically expansive seal and the second diametrically expansive seal against the airway sufficient to retard fluid from passing across the first diametrically expansive seal and the second diametrically expansive seal.

27. The airway assembly defined in claim 16, wherein the generally tubular diametrically expansive seal further comprises a plurality of reinforcing members in a radially spaced apart relationship relative to adjacent reinforcing members and operably associated with the generally tubular diametrically expansive seal that facilitates diametrically expansive movement of the generally tubular diametrically expansive seal between a collapsed position and an expanded position that exerts a sealing pressure of the generally tubular diametrically expansive seal for sealing against the airway sufficient to retard fluid from passing across the generally tubular diametrically expansive seal.

28. The airway assembly as defined in claim 16, wherein the inner tube further comprises:

(i) a first position mark disposed a proximal end of the inner tube indicating a diametrically expanded position of the expansive seal when the outer tube is relatively positioned at the first position mark; and

(ii) a second position mark disposed at a proximal end of the inner tube and in spaced apart relationship from the first position mark indicating a diametrically expanded position of the expansive seal and an open position of at least one aperture in the inner tube proximal to the seal when the outer tube is relatively positioned at the second position mark.

29. The airway assembly as defined in claim 16, wherein the diametrically expansive seal further comprises at least one of a radiographic marker and a fluoroscopic marker.

30. The airway assembly as defined in claim 16 wherein proximal portions of each of the inner tube and the outer tube are more rigid than distal portions of the inner tube and the outer tube.