Airway device with tongue-engaging member
An oral device for improving airway patency includes a base adapted to be held between a patient's upper and lower teeth and a tongue-engaging member. The tongue-engaging member engages the tongue and displaces the tongue anteriorly when the base is held between the patient's teeth. A vacuum is applied through the base and the tongue-engaging member in order to draw the soft palate against a posterior region of the tongue in order to stabilize the soft palate and open or clear the patient's airway.
1. An oral device for temporary placement in a patient's oral cavity, said device comprising:
a base adapted to be held between a patient's upper and lower teeth;
a vacuum conduit;
a lip seal coupled to the base and configured for passing the vacuum conduit into the patient's oral cavity; and
a tongue-engaging member coupled to the base and having an integral plenum connected to the vacuum conduit, wherein the tongue-engaging member has (1) anterior and posterior surfaces where the anterior surface is inclined forwardly relative to a plane of the base when the base is held between the upper and lower teeth and disposed to engage a medial region of a tongue when the base is positioned between the patient's teeth, and (2) at least one port on the posterior surface of the member and open to the integral plenum.
2. An oral device as in claim 1 , wherein the anterior surface of the tongue-engaging member is generally parallel to the posterior surface of the member.
3. An oral device as in claim 2 , wherein the tongue-engaging member has a lower edge which extends up to at least 8 mm above or below the plane of the base and from 0 mm to 5 mm in a posterior direction from second molars of the patient when the base is positioned between the upper and lower teeth.
4. An oral device as in claim 3 , wherein the tongue-engaging member has an upper edge which extends at least 5 mm above the plane of the base and from 0 mm to 20 mm in an anterior direction from second molars of the patient when the base is positioned between the upper and lower teeth.
5. An oral device as in claim 4 , wherein the upper edge is deflected in an anterior direction to guide the tongue forwardly when the base is positioned between the upper and lower teeth.
6. An oral device as in claim 3 , wherein the posterior surface of the tongue-engaging member has an area in a range from 600 mm 2 to 850 mm 2 .
7. An oral device as in claim 5 , wherein the anterior surface of the tongue-engaging member has an area in a range from 550 mm 2 to 750 mm 2 .
8. An oral device as in claim 1 , wherein the base comprises a front bite plate configured to be held between opposed upper and lower front teeth.
9. An oral device as in claim 8 , further comprising left and right connectors which join the integral plenum to left and right portions of the base.
10. An oral device as in claim 8 , further comprising an axial bridge which joins the integral plenum to an anterior portion of the base.
11. An oral device as in claim 1 , wherein the tongue-engaging member comprises two or more enclosures enclosing separate plenums.
12. An oral device as in claim 11 , wherein the tongue-engaging member includes a right enclosure and a left enclosure with an opening therebetween.
13. An oral device as in claim 12 , further comprising left and right connectors which join the left and right enclosures to left and right portions of the base.
14. An oral device as in claim 1 , wherein the tongue engaging member has a plurality of ports distributed over the posterior surface thereof.
15. An oral device as in claim 1 , wherein the surfaces of the tongue-engaging member are inclined forwardly at an angle in a range from 45° to 60° relative to a plane of the base when positioned between the upper and lower teeth.
16. An oral device as in claim 1 , wherein the base comprises a U-shaped bite plate configured to be positioned between the the upper and lower teeth.
17. An oral device as in claim 1 , wherein the base comprises separated left and right molar bite plates configured to be held between opposed upper and lower molars.
18. An oral device as in claim 1 , wherein the tongue-engaging member consists of a single enclosure enclosing the plenum.
19. A method for stabilizing a soft palate in a patient's oral cavity, said method comprising:
engaging an anterior surface of a member against a medial region of a tongue, wherein the anterior surface is inclined forwardly relative to a plane of a base when the base is held between upper and lower teeth to displace the medial region of the tongue in an anterior direction relative to the soft palate to provide a clearance therebetween; and
applying a vacuum within the clearance through a posterior surface of the member to draw together the soft palate and a posterior region of the tongue.
20. A method as in claim 19 , wherein the anterior surface is inclined at an angle in a range from 45° to 60° relative to a bite plane between the patient's upper and lower teeth.
21. A method as in claim 20 , wherein the member has a lower edge which extends up to 8 mm above or below the bite plane and from 3 mm to 5 mm in a posterior direction from the second molars of the patient.
22. A method as in claim 21 , wherein the member has an upper edge which extends at least 5 mm above the bite plane and from 0 mm to 20 mm in an anterior direction from the second molars of the patient.
23. A method as in claim 21 , wherein the anterior surface engages the tongue over an area in a range from 550 mm 2 to 750 mm 2 .
24. A method as in claim 19 , wherein the vacuum draws the soft palate against the posterior surface of the member.
25. A method as in claim 19 , wherein the soft palate remains spaced-apart from the posterior surface of the member while the vacuum is being applied.
26. A method as in claim 19 , wherein an upper edge of the member is deflected in an anterior direction to increase the anterior displacement of the tongue.