Nasal spray apparatus and system

A nasal spray system for dispensing medicaments and vaccines through nasal passages is described comprising three elements; a standard syringe, a disposable pre-filled nasal spray tip, and a disposable snap cap that protects the nasal spray tip from contamination. To dispense medicaments and vaccines, the disposable snap cap is removed and the syringe mated to the nasal spray tip. Upon insertion into a nasal passage, the syringe plunger is pushed forward dispensing the atomized liquid. The nasal spray tip is discarded and a new spray tip mated with the syringe for insertion into the other nasal passage.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawings and particularly FIG. 1 thereof, the assembled nasal spray system 10 of the present invention is comprised of three main elements: a disposable snap cap 20 , a nasal spray tip 30 , and a standard syringe 40 . An exploded view of nasal spray system 10 is shown on FIG. 2 to more clearly delineate the configuration of each element and illustrate how the elements interface and fit with one another when assembled. Referring now to FIG. 3 is a section view taken trough A-A of FIG. 1 and shows the nasal spray tip 30 and disposable snap cap 20 mated to syringe 40 . Disposable snap cap 20 protects nasal spray tip 30 from ambient contaminants and is removed prior to insertion of nasal spray tip 30 into a nostril. Generally one nasal spray tip 30 is used for each nostril. Syringe tip 41 is shown punched through frangible foil end closure 31 and inserted into mating cavity in nasal spray tip 30 . The plunger 42 of syringe 40 with lure tip 43 acts as a pump to dispense product dosage and is shown in the retracted position in preparation for nasal insertion and spray activation. Dosage chamber 32 of nasal spray tip 30 may contain a half dose 33 of the appropriate medicament. To use the nasal spray system 10 , the syringe cap (not shown) is removed and the plunger retracted to its predetermined set point. The syringe is pushed into the nasal tip 30 to break and push the frangible seal 31 fragments into recess 31 a thereby obviating interference to opening in syringe tip 41 . Alternatively, frangible induction seal 31 may be removed by pull tab 35 . The disposable snap cap 20 is removed and nasal spray tip 30 inserted into nostril. Plunger 42 is pushed forward to pump predetermined medicament dose 33 into nostril. Empty nasal tip 30 is then removed and discarded. The same procedure is used to spray medicament into the other nostril. The tip 30 as illustrated has an elongate hollow bore 32 defining the dosage chamber which in the present instance is of a stepped configuration having a first bore section 60 of a diameter D to snugly embrace the syringe tip 41 and to seat the tip on the end of the syringe barrel by a press fit, a frusto-conical transition section 62 and a forward section 64 of a diameter D 2 smaller than the diameter D. The forward end of the chamber 32 necks down to a very small circular discharge opening 66 of short axial length L having outwardly flared frusto-conical surfaces 68 and 70 on either side of the outlet opening 66 . A series of circumferentially, spaced axially extending fins 72 are provided adjacent the discharge passageway 66 which as illustrated in FIG. 3 have gently curved inner ends as at 72 which merge with the forward section 64 of the dosage chamber 32 . The enlarged view of nasal spray tip 30 shown on FIG. 4 with typical dimensions is configured for insertion into nasal passages. Raised ribs 36 extend longitudinally down the periphery of nasal spray tip 30 preventing over insertion of the tip 37 while the areas 38 of FIG. 4A between raised ribs 36 define flow passageways to provide venting allowing easy inhalation of medicaments. Frangible induction seal 31 with pull tab 35 attached to closure flange 39 prevents medicaments in the pre-filled nasal spray tip 30 from escaping and also protects medicaments from ambient contaminants. A circumferential groove 50 around tip 37 provides the means for securing disposable snap cap 20 to nasal spray tip 30 . In preparation for dispensing dose 33 , syringe tip 41 is pushed through frangible induction seal 31 and securely wedged into syringe pocket 51 of nasal spray tip 30 . To dispense dose 33 , syringe plunger 41 is pushed forward pumping the contents of pre-filled nasal spray tip 30 through exit nozzle 34 also shown in expanded view FIG. 4B . Referring to FIG. 4 C, view B-B, ribs 52 on exit nozzle 34 create turbulence atomizing the liquid and spread throughout the nasal passage by expansion nozzle 53 . The enlarged sectional view of disposable snap cap 20 with typical dimensions shown in FIG. 5 is taken through A-A of FIG. 5A . The ribbed top part 44 provides a non-slip surface for removing disposable snap cap 20 . Opening 45 is designed to accept tip 37 of nasal spray tip 30 . When mated, the internal snap ring 46 snaps into circumferential groove 50 on tip 37 securely holding disposable snap cap 20 and preventing contamination of pre-filled medicaments in nasal spray tip 30 .