Devices and methods for delivering fluid to a nasal cavity

1. A device to deliver fluid from a container to a nasal cavity, the device comprising:

a hollow inner cannula comprising an inlet at a proximal end of the inner cannula and first and second outlets positioned towards a distal end of the inner cannula with the first and second outlets on different lateral sections, the inlet and the first and second outlets being in fluid-flow relationship;

a hollow outer cannula that extends over and houses the inner cannula, the outer cannula comprising third and fourth outlets exposed to an exterior of the device and towards a distal end of the outer cannula, the third and fourth outlets on different lateral sections of the outer cannula; and

a cap connected to both the inner cannula and the outer cannula and configured to provide relative axial movement of the inner and outer cannulas along a longitudinal axis of the cannulas between a first axial position and a second axial position;

wherein the cap comprises a first section that is attached to the proximal end of the inner cannula, and a second section that is rotatable relative to the first section and that includes first and second ramps that engage with the outer cannula;

wherein the first and second sections are rotatable relative to each other in a clockwise direction to slide the outer cannula along the first ramp and move the outer cannula axially relative to the inner cannula in a first direction;

wherein the first and second sections are rotatable relative to each other in a counter-clockwise direction to slide the outer cannula axially relative to the inner cannula in an opposing second direction;

wherein, in the first axial position, the first and third outlets are aligned and the second and fourth outlets are misaligned thereby permitting the fluid to be predominantly ejected laterally out of the device from the third outlet via the first outlet relative to the fourth outlet via the second outlet;

wherein, in the second axial position, the first and third outlets are misaligned and the second and fourth outlets are aligned thereby permitting the fluid to be predominantly ejected laterally out of the device from the fourth outlet via the second outlet relative to the third outlet via the first outlet.

2. The device of claim 1 , wherein the inner cannula is fixedly attached to the first section of the cap to prevent movement of the inner cannula during movement of the outer cannula.

3. The device of claim 1 , further comprising fins that extend radially outward from the outer cannula and engage with first and second ramps of the second section.

4. The device of claim 1 , wherein each of the first, second, third, and fourth outlets comprise a plurality of openings.

5. The device of claim 4 , wherein:

the plurality of openings of the first and third outlets are common in number; and

the plurality of openings of the second and fourth outlets are common in number.

6. The device of claim 1 , further comprising an opening in the distal end of each of the inner and outer cannulas.

7. A device to deliver fluid from a container to a nasal cavity, the device comprising:

a delivery tube comprising inner and outer cannulas with the inner cannula positioned within a hollow interior of the outer cannula, each of the cannulas comprising:

an elongated shape with a proximal end and an opposing distal end;

a first outlet towards the distal end and positioned on a first lateral section;

a second outlet towards the distal end and positioned on a second lateral section;

the first outlet and second outlet of the outer cannula being exposed to an exterior of the device;

a cap connected to both the inner cannula and the outer cannula and configured to axially position the inner and outer cannulas relative to one another between a first axial position and a second axial position;

wherein the inner cannula is fixedly connected to the cap and the outer cannula is movable relative to the cap, the inner cannula being stationary during movement of the outer cannula;

wherein the first axial position comprises the first outlets aligned at the first lateral section of the delivery tube and the second outlets misaligned at the second lateral section of the delivery tube to deliver the fluid out of the device in a first lateral direction;

wherein the second axial position comprises the second outlets aligned at the second lateral section of the delivery tube and the first outlets misaligned at the first lateral section of the delivery tube to deliver the fluid out of the device in a second lateral direction.

8. The device of claim 7 , wherein the proximal ends of each of the inner and outer cannulas are connected to the cap.

9. The device of claim 7 , wherein one of the inner cannula and the outer cannula are threaded onto a threaded portion of the cap.

10. The device of claim 7 , wherein in the first axial position the second outlets overlap a lesser amount than the first outlets such that a predominant amount of the fluid is ejected from the delivery tube in the first lateral direction and a lesser amount of the fluid is ejected from the delivery tube in the second lateral direction.

11. The device of claim 7 , wherein the first outlets and the second outlets of each of the inner and outer cannulas are spaced apart around the perimeter of the cannulas by an angle of 90° or less.

12. The device of claim 7 , wherein the cap comprises a plurality of members that each include an opening, the members being rotatably connected together and with the openings coaxially aligned.