Nasal continuous positive airway pressure device
View Patent ↗A nasal continuous positive airway pressure (nCPAP) device having a hollow body with a proximal wall, a distal wall, and an exhaust port extending through the distal wall. A proximal tubular member extends through the proximal wall of the body and is arranged such that a stream of gas entering the body through the proximal tubular member will exit the proximal tubular member in a first direction and then enter the exhaust port. A nozzle extends through the body and is arranged such that a stream of gas entering the body through the nozzle will exit the nozzle and then enter the proximal tubular member in a second direction that is opposite the first direction.
1. A nasal continuous positive airway pressure (nCPAP) device comprising:
a hollow body having a proximal wall and a distal wall;
an exhaust port extending through the distal wall of the body;
a plurality of nozzles extending through the body and arranged such that a stream of gas entering the body through each nozzle impinge upon each other and combine to flow in a first direction proximal toward the proximal wall;
a tubular member extending through the proximal wall of the body, the proximal tubular member comprising an inner cross-section defining a relief zone between the nozzles and proximal wall, and a tapering zone between the relief zone and the proximal wall, wherein a fluid flow a stream of gas entering the body through the proximal tubular member in a second direction that is opposite the first direction causes the combined stream of gas from the nozzles to separate and enter the relief zone.
2. The device of claim 1 , wherein the body comprises a first and second fluid flow circuits between the proximal wall and the distal wall.
3. The device of claim 2 , wherein the nozzles are non-parallel relative to each other and relative to a corresponding centerline through each fluid flow circuit.
4. The device of claim 3 , wherein at least two nozzles are transversely aligned relative to the corresponding passageway centerline through each fluid flow circuit.
5. The device of claim 3 , wherein the stream of gas entering the body through each nozzle impinges upon each other at a point displaced from the corresponding centerline through each fluid flow circuit.
6. The device of claim 2 , wherein the nozzles extend into each flow circuit at circumferential locations about the fluid flow circuit.
7. The device of claim 2 , wherein each fluid flow circuit comprises a tubular member.
8. The device of claim 7 , wherein the body includes a housing within which each tubular member is at least partially disposed and forming an opening adjacent the proximal wall, respectively, the device further comprising:
a patient interface piece including a base forming a pair of lumens each sized for mounting about a proximal end of a respective one of the tubes; and
an interface portion fluidly connected to the lumens and adapted for fluid connection to a patient's nares;
wherein the housing and the base are configured such that upon final assembly, the base nests within the opening.
9. The device of claim 8 , wherein the housing and the base are configured such that upon final assembly, a pressure monitoring fluid circuit is defined from the lumens to a pressure monitoring port formed in the housing.
10. The device of claim 9 , wherein the interface portion is one of a nasal mask and a pair of prongs.
11. The device of claim 1 , wherein each nozzle comprises an inlet end fluidly connected to a common manifold.
12. The device of claim 1 , wherein the tubular member forms a radial slot adjacent a proximal end thereof, and further wherein the body forms a pressure monitoring port fluidly connected to the radial slot.