Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1998-08-31
2000-04-25
Coggins, Wynn Wood
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604232, 604403, A61M 530
Patent
active
060538902
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a device permitting the injection of a product, in particular a pharmaceutical product, into the human or animal body.
It concerns more particularly an apparatus without hypodermic needle, equipped with an arming system, which permits the subcutaneous, intradermal or intramuscular administration of medical substances or vaccines, contained in a single dose, and forming a cartridge.
BRIEF DESCRIPTION OF THE PRIOR ART
Apparatuses for injection by transcutaneous jet without needle are known which have been developed for veterinary or human medicine. The absence of a needle simplifies the use of the apparatus and does not require specific knowledge on the part of the user. They are generally used for mass vaccination campaigns and are designed to be used quickly by nonspecialist personnel. The use of a jet avoids to the greatest extent bacterial and/or viral contamination of one subject by another, which happens in those cases where the same needle is used by several subjects without being sterilized. These apparatuses are generally designed in a pistol shape, equipped with a receptacle for the product which is to be injected, driven through a nozzle, by the action of a plunger displaced within a chamber, filled beforehand with the substance, the plunger being moved by a striker. Alternatively the pistol includes a breech or a magazine containing a cartridge, also placed in the axis of the striker.
Thus, the document WO 95/03844 discloses a device for injection by jet without needle, which is provided with an arming device activated by the rotation of a cap situated at one of the ends of the body of the device.
The document WO 95/27523 describes a device for injection by jet without needle, provided at one of its ends with a cartridge formed in one piece.
The document WO 96/15821 describes a cartridge including a capsule on which a sleeve tube is fitted by force and induces stresses on the capsule.
Finally, the document EP 427 457 describes a device for injection by jet without needle, provided with a cartridge which cooperates at one of the ends of the device, by way of a component forming a breech.
Given the mode of action of the striker, which has a substantial kinetic energy before reaching the plunger of the cartridge, which can, in cases where the cartridge is not correctly arranged in the magazine of the pistol, cause it to burst at the start of the injection, these apparatuses are not reliable and are not easy to use if their use is infrequent.
The present invention is therefore aimed at overcoming these disadvantages by making available a device which is without magazine for a cartridge and which permits the injection by jet, without needle, of the product contained in a cartridge placed directly at the head of the device, under strictly aseptic conditions, for a single use.
For this purpose, the cartridge for injection of a product, in particular a pharmaceutical product, by jet without needle, for single use, and intended to be fixed at a first end of the body of an injection device, the second end of the body receiving a cap which is able, by virtue of a relative movement of the body, to drive an arming device, cooperating with a percussion member intended to cooperate with the cartridge, is characterized in that it includes two elements: the product; overmoulded on the first element.
Other characteristics and advantages of the present invention will be evident from the description which follows, with reference being made to the attached drawings which show an illustrative embodiment of the invention, without this embodiment in any way being of a limiting character. In the figures:
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a plan view, in front elevation and in section, of the device according to the invention, in the armed position;
FIG. 2 is a plan view, in front elevation and in section, of the device according to the invention, in the triggered position;
FIG. 3 is a view, on a larger scale and in section, of a cartridge containing
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Moreau Defarges Alain
Moreau Defarges Xavier
Coggins Wynn Wood
Thanh Loan H.
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