Middle ear pressure equalizing device with improved pressure control
An apparatus for equalizing pressure in a middle ear includes a hand-held air source for providing a continuous flow of air at a predetermined rate and a tapered sealing nostril plug adapted to be sealed against a nostril. The tapered nostril plug has a channel there through for delivering the continuous flow of air. The channel of the tapered plug is adapted to be placed in communication with the air source through an adjustable valve assembly for selecting a pressure limit for the air in the channel of the nostril plug.
1. In an apparatus for equalizing pressure in the middle ear having an electric powered air source for providing a predetermined continuous flow of air to an exit port of a hand-held device, the improvement comprising:
(a) an adjustable valve assembly operatively coupled between the electrically powered air source and the exit port for selecting a pressure limit of the air at said exit port, wherein the adjustable valve assembly comprises:
(i) a manifold having an inlet port in fluid communication with the air source, an outlet port in fluid communication with the exit port and a plurality of exhaust ports leading to the ambient;
(ii) a corresponding plurality of check valves, each of the check valves adapted to open at different predetermined pressures operatively disposed in said plurality of exhaust ports; and
(iii) a rotatable member contained in the manifold for selectively directing fluid from the inlet port to an individual one of the exhaust ports, the rotatable member having a fluid flow passage.
2. The apparatus of claim 1 wherein the pressure limit is in a range from about 1 psi to about 10 psi.
3. The apparatus as in claim 2 wherein the continuous flow is in a range from about 0.1 liters/minute to about 3.5 liters/minute.
4. The apparatus as in claim 1 wherein the adjustable valve assembly comprises:
(a) a valve housing having an inlet port in fluid communication with the air source, an outlet port in fluid communication with the exit port, an exhaust port leading to the ambient and a valve seat located between the exhaust port and the inlet port;
(b) a spring biased ball valve adapted to engage the seat to block air flow through the exhaust port as long as the air pressure at the exit port remains below a predetermined level; and
(c) means for varying the spring biasing force on said ball.
5. The apparatus of claim 4 wherein the means for varying the spring biasing force on the ball includes an internally threaded cap for engaging external threads on the housing, said cap cooperating with a spring that engages the ball whereby rotation of the cap varies spring pressure on the ball.
6. The apparatus as in claim 1 wherein a first of the plurality check valves opens at about 11/2 psi, a second of the plurality of check vales opens at about 21/2 psi and a third of said plurality of check valves opens at about 10 psi.
7. The apparatus as in either claim 1 or claim 4 and further including a one-way valve disposed proximate the exit port for blocking body fluids from entering an interior of the hand-held device.
8. The apparatus as in claim 7 wherein the one-way valve is a duck bill valve.
9. In an apparatus for equalizing pressure in the middle ear having an electric powered air source for providing a predetermined continuous flow of air to an exit port of a hand-held device, the improvement comprising:
(a) an adjustable valve assembly operatively coupled between the electrically powered air source and the exit port for selecting a pressure limit of the air at said exit port; and
(b) a one-way valve disposed proximate the exit port for blocking body fluids from entering an interior of the hand-held device.
10. The apparatus of claim 9 wherein the pressure limit is in a range from about 1 psi to about 10 psi.
11. The apparatus as in claim 10 wherein the continuous flow is in a range from about 0.1 liters/minute to about 3.5 liters/minute.
12. The apparatus as in claim 9 wherein the adjustable valve assembly comprises:
(a) a valve housing having an inlet port in fluid communication with the air source, an outlet port in fluid communication with the exit port, an exhaust port leading to the ambient and a valve seat located between the exhaust port and the inlet port; (b) a spring biased ball valve adapted to engage the seat to block air flow through the exhaust port as long as the air pressure at the exit port remains below a predetermined level; and (c) means for varying the spring biasing force on said ball.
13. The apparatus of claim 12 wherein the means for varying the spring biasing force on the ball includes an internally threaded cap for engaging external threads on the housing, said cap cooperating with a spring that engages the ball whereby rotation of the cap varies spring pressure on the ball.
14. The apparatus as in claim 12 wherein the one-way valve is a duck bill valve.