Surgery – Liquid medicament atomizer or sprayer – Spray impinged against baffle in or adjacent flow conduit
Patent
1985-08-26
1990-07-10
Hindenburg, Max
Surgery
Liquid medicament atomizer or sprayer
Spray impinged against baffle in or adjacent flow conduit
12820023, 12820315, A61M 1100
Patent
active
049400517
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to an inhalation device provided with a socket for an aerosol container that contains material to be inhaled, the bottom of said socket being fitted with a baffle which receives the valve stem of said container and extends into an inhalation chamber provided with a mouthpiece, and a nozzle mounted on the end of an inlet channel and terminating in said inhalation chamber.
At present, medicine is inhaled into the lungs by using either an inhalation aerosol or a powder metering device. A major drawback in using a inhalation aerosol device is that the dosing must be effected in the beginning of inhalation, which all patients cannot manage. Another minor drawback is that aerosol does not work at temperature below zero due to the relatively low vapor pressure of the generally used propellant compositions.
Powder metering devices do not suffer from the above drawbacks but, due to the small amounts of medicine used, they require the use of a carrier, at present lactose or glucose. These are hygroscopic carbohydrates which readily adhere to a moist surface. A powder metering device gets wet on the inside if exhaled through or brought from cold weather to warm indoor air. A conseuence is soiling of the device and diminishing of the inhaled dosage. An inexact dosage may also result if an inhalation-ready device is held in a wrong position wherever some of the powder falls out through the inhalation hole. From a user's point of view, filling of a powder metering device with a medical formulation for each dosage is inconvenient.
Lactose and glucose are useful as carriers for the mount pathogenes but there is no doubt that decay of the teeth will increase because of the continuous exposure to the sugar caused by the powder. Also, for patients who are over-sensitive to lactose, such a medical formulation is not always suitable.
SUMMARY OF THE INVENTION
An object of the invention is to provide an inhalation device whereby all the above drawbacks are eliminated, i.e. a device that is simple to operate and provides effective inhalation of the substance to be inhaled with procedures as simple as possible.
The above object of the invention is fulfilled with a device characterized by an opposing baffle plate for pulverizing the medicine spray in the inhalation chamber mounted at a distance from the inlet nozzle which is directed towards the end opposite of the inhalation chamber mouthpiece, and a one-way valve for passing air into the chamber.
Thus, the above device comprises a combination of an aerosol spray and a powder inhalation device. In the device, the dosage of a powdered medical formulation proceeds from an aerosol container. This arrangement is highly preferable and simple from the point of view of a user but still permits the inhalation of a powder to proceed according to the user's own inhaling. After all, this type of inhalation has been found more effective than the delivery of an aerosol spray directly into the mouth.
The air needed for inhalation is passed into the inhalation chamber through a one-way valve, preferably mounted on the wall between the socket and the inhalation chamber. The one-way valve receives the best possible protection in this position below the aerosol container. Also, the socket is usually fitted with a protective cover.
For the best possible spray atomization, said baffle plate is concave with repect to the nozzle. Thus, the spray atomizes effectively and spreads all over the chamber.
The invention will now be described in more detail with reference made to the accompanying drawings, in which
FIG. 1 shows one embodiment of a device of the invention;
FIGS. 2-3 show different modifications of such device; and
FIG. 4 shows an alternative embodiment of such device with the aerosol container positioned adjacent to the mouthpiece.
DETAILED DESCRIPTION OF THE INVENTION
A device shown in FIG. 1 comprises a tubular body for forming an inhalation chamber 10 with an upright socket 1 at the end. This socket 1 is intended for an aerosol
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Dunn Michael L.
Ellis Howard M.
Hindenburg Max
Huhtamki Oy
Reichle K. M.
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