Sleep apnea therapy with naso-phyrangeal bypass
Naso-pharyngeal devices for treating sleep apnea can perform two functions simultaneously: keeping an open airway through an inner lumen of the device; and support for the tissue in the airway, because keeping the tissue from completely collapsing creates the possibility of some air movement around the device in the critical areas associated with obstructive sleep apnea.
1. A nasal-pharyngeal bypass useful for establishing an airway for the patient, the bypass comprising:
a collapsible tube having a proximal end, a distal end, a lumen extending through the tube, and a length between the proximal and distal ends so that, when the tube is inserted through the patient's nostril, through the patient's nasal cavity, and into the patient's throat, the distal end of the tube is above the patient's epiglottis and the proximal end of the tube is outside of the patient's nostril;
wherein the tube has a collapsed configuration in which the tube is sized to be inserted through the patient's nasal cavity; and
wherein the tube has an expanded configuration in which the tube is sized to be retained in the patient's nasal cavity and establish a bypass airway for the patient through the lumen of the tube;
wherein the tube comprises a flat sheet, the flat sheet having a cavity therein, a closed distal end, and an opening in the proximal end communicating with the cavity,
wherein the cavity extends from the distal end to the proximal end, wherein the flat sheet is rolled onto itself to form the tube, and including a one-way valve in the proximal opening; and
wherein the proximal and distal ends define a longitudinal direction, and wherein the cavity includes finger portions which extend away from the longitudinal direction.
2. A nasal-pharyngeal bypass according to claim 1 , wherein the tube comprises a coil spring and a coating around the coil spring.
3. A nasal-pharyngeal bypass according to claim 2 , wherein the coil spring collapsed configuration has a V-shaped cross-section.
4. A nasal-pharyngeal bypass according to claim 2 , further comprising a mandrel extending through the coil spring in the collapsed configuration, the mandrel including an end piece sized so that, when the mandrel is pulled proximally out of the collapsed tube, the end piece expands the coil spring into the expanded configuration.
5. A nasal-pharyngeal bypass according to claim 1 , wherein the flat sheet comprises a side edge, and wherein the side edge is not connected to other portions of the sheet when the sheet is rolled onto itself to form the tube.
6. A nasal-pharyngeal bypass according to claim 1 , further comprising:
a mandrel extending proximally from the distal end.
7. A nasal-pharyngeal bypass according to claim 6 , wherein the mandrel is embedded in the sheet adjacent to the cavity.
8. A nasal-pharyngeal bypass according to claim 6 , further comprising:
a lumen extending through the sheet from the distal to the proximal end; and
wherein the mandrel is movably positioned in the sheet lumen adjacent to the cavity.
9. A nasal-pharyngeal bypass according to claim 6 , wherein the mandrel is formed of a malleable material.
10. A nasal-pharyngeal bypass according to claim 6 , wherein the mandrel comprises a bend along its length.
11. A nasal-pharyngeal bypass according to claim 6 , wherein the mandrel comprises an enlarged distal tip.
12. A nasal-pharyngeal bypass according to claim 1 , wherein the one-way valve comprises a reed valve, and further comprising an inflation tube sized to be received in the reed valve.
13. A nasal-pharyngeal bypass according to claim 1 , wherein the flat sheet comprises at least a portion formed of a permeable material.