Half-disposable syringe barrel

Details Half-disposable syringe barrel Half-disposable syringe barrel

1999-11-12

2002-09-17

Nguyen, Anhtuan T. (Department: 3763)

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

Reexamination Certificate

active

06450993

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a half-disposable syringe barrel which is able to isolate the syringe barrel from the medicine and the flowing back blood and prevent the syringe barrel from being contaminated thereby. The syringe barrel is applicable to the injection syringes used in various hospitals and clinics.
In the existent hospitals or clinics, injections are taken quite frequently during therapy. Some of the syringe barrels are discarded after used. However, some syringe barrels are made of glass. After injection, the needle is extracted and the glass syringe barrel is sterilized for re-use. Although the amount of medical waste can be reduced by such procedure, the sterilization may be incomplete to lead to infection.
In order to ensure that the patient is protected from being injected with the infected glass syringe barrel, the plastic-made syringe barrel is used instead of the glass-made one. The plastic syringe barrel is discarded after used without repeated use. This ensures the safety of the patient. However, a great amount of medical wastes are produced due to the disposable syringe barrel. It is troublesome to treat these medical wastes and resource is wasted. In fact, the needle of the syringe, which is surely contaminated, should be detached from the syringe barrel and discarded without further use, while the syringe barrel which is not contaminated can be recovered and the material can be used for reproduction to save resource.
SUMMARY OF THE INVENTION
It is therefore a primary object of the present invention to provide a half-disposable syringe barrel which is able to isolate the syringe barrel from the medicine and the flowing back blood and prevent the syringe barrel from being contaminated thereby.
It is a further object of the present invention to provide the above half-disposable syringe barrel which permits effective recovery of medical resource and reduces the amount of medical waste.
According to the above objects, the half-disposable syringe barrel of the present invention includes a barrel syringe and a cap member as two stages. A plunger is fitted in the syringe barrel. An emulsion ring is disposed in the cap member. The emulsion ring is formed with a membrane and is made of highly flexible material. A lubricant is overlaid on the emulsion ring and the membrane thereof. The cap member is fitted with the front end of the syringe barrel. When pulling the plunger backward to suck a medicine, the highly flexible membrane of the emulsion ring is extended and sucked to attach to the wall of the syringe barrel. Therefore, the medicine is enclosed by the emulsion ring and the membrane and isolated from the wall of the syringe barrel. Therefore, the syringe barrel and the plunger are not contaminated by the medicine and the flowing back blood. After the cap member is removed, the syringe barrel can be recovered for reuse.
The present invention can be best understood through the following description and accompanying drawings wherein:


REFERENCES:
patent: 6142976 (2000-11-01), Kubo

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