Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1995-01-12
1997-06-03
Hafer, Robert A.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
12820315, A61M 1300
Patent
active
056349009
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a constant quantity feed device, and a method thereof, for feeding powder, and more particularly relates to a multi-dose powdered medicine administering device. Still more particularly, the present invention relates to a multi-dose powdered medicine administering device and method thereof by which a unit-dose of powdered medicine, of a constant quantity, is continuously extracted from a quantity of stored powdered medicine and given to the patient a unit-dose of medicine (adminstration of multi-dose).
The device of the present invention is used as a multi-dose powdered medicine dispenser by which a unit-dose of powdered medicine of a constant quantity can be continuously divided from a multi-dose of powdered medicine and administered into the body cavity such as the nasal cavity by spraying.
Further, the device of the present invention is used as a multi-dose powdered medicine dispenser by which a unit-dose of powdered medicine of a constant quantity can be quantitatively extracted from a larger quantity of powdered medicine and administered into the body cavity such as the trachea, a bronchus or a lung by means of inhalation.
BACKGROUND ART
Powdered medicine is administered into a body cavity such as the nasal cavity or the oral cavity, and air ways such as the trachea, a bronchus or a lung by means of spraying or inhalation. For example, powdered medicine is administered into the nasal cavity or the air ways of a patient suffering from nasal allergy or asthma. Recently, attention has been given to a drug delivery system in which medicine is absorbed into the bloodstream through the mucous membrane of the nasal cavity or lung and it is attempted to administer powdered medicine via the mucous membrane.
When medicine is administered in the above manner, a powdered medicine administering device is used. Powdered medicine administering devices are classified into two types according to the storage system for the powdered medicine.
In the first type of powdered medicine administering device, a quantity of powdered medicine to be administered in a single operation is accommodated in an appropriate container. A unit-dose powdered medicine is accommodated in an appropriate capsule. Therefore, a unit-dose of powdered medicine is administered at each administering operation. In the second type of powdered medicine administering device, a quantity of powdered medicine to be administered in a plurality of operations is accommodated in an appropriate container. Each time an administering operation is carried out, an accurate unit-dose of powdered medicine is extracted from the container in which the powdered medicine is accommodated. In the present invention, a quantity of powdered medicine to be administered in a single operation is defined as a unit-dose, and a quantity of powdered medicine to be administered in a plurality of operations is defined as a multi-dose. However, in some cases, an administering operation in which powdered medicine, accommodated in the form of a unit-dose, is administered for each unit-dose is referred to as a unit-dose, and an administering operation in which powdered medicine accommodated in the form of a multi-dose is administered for each unit-dose is referred to as a multi-dose.
As an example of the unit-dose powdered medicine administering device by which powdered medicine is sprayed into the nasal cavity, a powdered medicine administering device has been proposed by the present inventors (disclosed in Japanese Patent Publication No. 63-6024). Concerning the unit-dose inhaler by which powdered medicine is inhaled into the air ways, a large number of devices have been proposed. For example, there is provided an inhaler in which capsules made of nonpoisonous material such as gelatin are used. In each capsule, a predetermined quantity of unit-dose powdered medicine is accommodated. In this type of inhaler, a capsule opening device is provided, by which a hole is formed in a capsule inserted into the inhaler, that is, a capsule opening
REFERENCES:
patent: 5383850 (1995-01-01), Schwab et al.
patent: 5394868 (1995-03-01), Ambrosio et al.
Makino Yuji
Suzuki Yoshiki
Gring N. Kent
Hafer Robert A.
Teijin Limited
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