Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Reexamination Certificate
1997-09-17
2001-02-06
Kennedy, Sharon (Department: 3763)
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
C604S192000
Reexamination Certificate
active
06183445
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a shielding means for a needle of a container-needle assembly comprising a container having an elongate body, a needle and connecting parts for connecting the container releasably with the needle, said shielding means comprising two coaxial tubular bodies, an inner and an outer body, which are made to telescope in relation to each other. The outer tubular body is adapted to at least partially receive the body of the container, and the inner tubular body is adapted to be displaced from a retracted position in which the needle is exposed, to an advanced position in which the needle is surrounded by the inner tubular body.
The invention further relates to a container-needle assembly comprising a container having an elongate body, a needle and connecting parts connecting the container releasably with the needle and comprising a shielding means having two coaxial tubular bodies, an inner and an outer body, which are made to telescope in relation to each other. The outer tubular body is adapted to at least partially receive the body of the container, and the inner tubular body is adapted to be displaced from a retracted position, in which the needle is exposed, to an advanced position, in which the needle is surrounded by the inner tubular body.
In connection with blood sampling by means of puncture where a needle connected with a sample container is connected to a patient's bloodstream, there is a risk of accidental needle-stick to the user. This risk also exists in connection with injection of e.g. medicine where a fluid in a sample container is transferred to a patient via a needle. It is therefore desired to be able to shield the used needle without the user getting in contact with the needle. For that purpose, several different shielding means and container-needle assemblies as described in the opening part have been developed.
Thus, U.S. Pat. No. 4,923,447 (Morgan) and U.S. Pat. No. 5 318 547 (Altschuler) disclose shielding means comprising two coaxial tubular bodies, an inner and an outer body, which are made to telescope in relation to each other, the outer of which is adapted to receive the container of a container-needle assembly and to be secured to the far end of said container relative to the needle. An operation projection at the inner tubular body extends through a longitudinal slot of the outer tubular body and may be operated by a user in order to displace the inner tubular body to an advanced position in which it surrounds and shields the needle.
Said known shielding means are thus connected with the container-needle assembly at the far end of the container relative to the needle. However, during e.g. blood sampling it is preferable after usage of the container-needle assembly to be able to remove the container with the withdrawn blood sample from the other part of the container-needle assembly, thus facilitating the handling of the blood sample. Such a removal is not possible in connection with the known shielding means.
SUMMARY OF THE INVENTION
It is therefore an object of the invention to provide a shielding means and a container-needle assembly as described in the opening part in order to enable removal of the container from the other part of the container-needle assembly.
This is achieved by means of a shielding means of the type described in the opening part which is characteristic by connection means for connecting said outer tubular body with the needle without connecting to the container. It is thereby achieved that the shielding means, when connected to a container-needle assembly, is connected to the needle which, at a later stage, is to be shielded without preventing the removal of the container.
In an embodiment where the connecting parts between the container and the needle comprise a connecting piece at one end of the body of the container and a hub part on the needle for receiving the connecting piece, the connection means is preferably adapted for connecting said outer tubular body with said hub part. Thus, the connection means comprises preferably an annular shoulder and means for engaging with and retaining the hub part when positioned at said shoulder. An embodiment is thus achieved which may be applied in connection with a sampler and a common, commercially available needle. Other suitable connection means or connectors comprise threads, press fits, bayonet joints and weldings, e.g. ultrasonic weldings, etc.
Alternatively, the connecting parts between the container and the needle may comprise a single part, e.g. a rubber membrane closing the container at the needle end of the container. In this case, the needle is preferably designed as a double-ended needle comprising a point in both ends, the needle being retained by the connection means, and the membrane is pierced by the needle so that the needle points are located on each side of the membrane when the container-needle assembly and the shielding means are assembled.
In an embodiment where an operation means extends from one end of the inner tubular body through a longitudinal slot of the outer tubular body, the connection means is preferably connected with one end of the outer tubular body through a narrow intermediate piece extending through a longitudinal slot of the inner tubular body.
The object is also achieved by means of a container-needle assembly of the type mentioned in the opening part which is characteristic of connection means for connecting said outer tubular body with the needle without connecting to the container. Such a container-needle assembly may be ready-made and be sterilized by the manufacturer and delivered to the user ready for use.
REFERENCES:
patent: 4664654 (1987-05-01), Strauss
patent: 4894055 (1990-01-01), Sudnak
patent: 4923447 (1990-05-01), Morgan
patent: 5219333 (1993-06-01), Sagstetter et al.
patent: 5232457 (1993-08-01), Grim
patent: 5314414 (1994-05-01), Hake et al.
patent: 5318547 (1994-06-01), Altschuler
patent: 5328473 (1994-07-01), Fayngold et al.
patent: 5385557 (1995-01-01), Thompson
patent: 5389085 (1995-02-01), D'Alessio et al.
patent: 5415645 (1995-05-01), Friend et al.
patent: 5417660 (1995-05-01), Martin
patent: 5472430 (1995-12-01), Vaillancourt et al.
patent: 5498243 (1996-03-01), Vallelunga et al.
patent: 5527294 (1996-06-01), Weatherford et al.
patent: 5658257 (1997-08-01), Ryles
patent: 5688241 (1997-11-01), Asbaghi
patent: 5709669 (1998-01-01), Haining
patent: 0350186A (1990-01-01), None
Lund Per William
Petersen Knud Robert
Cave LLP Bryan
Kennedy Sharon
Radiometer Medical A/S
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