US 7,886,779 B2 · Needle venting device for sealed containers

Abstract

An improved liquid handling needle device for use with the reconstitution of toxic drugs such as those used in chemotherapy and other applications. When diluent, in this example, is added through a septum into a sealed container, a positive pressure builds up. Aerosols containing the reconstituted drugs can be release through the punctured opening exposing personnel to potential contamination. This improved needle device provides a low-cost aerosol resistant vent channel between the outside diameter of the needle and the inside diameter of the tubular member holding it allowing gas diffusion from inside of the sealed container through the vent channel to the outside of the container when said needle device is inserted into the sealed container. This specifically engineered aerosol resistant vent channel prohibits the flow of the aerosol particles from flowing due to the frictional contact of the aerosol particles with either of the opposing walls forming the vent channel causing any aerosol particles to condense and be redirected back into the liquid receiving sealed container, thus providing sterile air venting for both the injecting and withdrawal of fluids.

Claims24

Dependent claims

An improved liquid handling needle device for use with a sealed container, said needle device comprising:

a needle hub having a upper and lower end, with an inner wall and an outer wall,
a needle having a upper and lower end, with an inner wall and an outer wall with means for attachment of said outer wall of said upper end of said needle to said inner wall of said needle hub in the vicinity of said lower end of said needle hub and forming a seal therewith,
a vent channel between said inner wall of said needle hub and said outer wall of said needle between said seal and said lower end of said needle hub defining a pre-determined sized aerosol resistant vent channel sized between 3 to 100 microns deep whereby prohibiting the flow of aerosol particles due to the frictional contact of said aerosol particles with either the opposing said inner wall of said needle hub or said outer wall of said needle forming said channel causing any aerosols to condense and be redirected back into said sealed container, and
said needle device including means for allowing gas diffusion from inside of said sealed container through said vent channel to outside of said sealed container through a pre-determined opening between said vent channel and said outer wall of said needle hub when said needle device is inserted into said sealed container.

1 more element

An improved liquid handling needle device for use with a sealed container, said needle device comprising:

a needle hub having a upper and lower end, with an inner wall and an outer wall
a needle having a upper and lower end, with an inner wall and an outer wall with means for attachment of said outer wall of said upper end of said needle to said inner wall of said needle hub in the vicinity of said lower end of said needle hub and forming a seal therewith,
at least one vent channel recess formed into said inner wall of said needle hub between said seal and said lower end of said needle hub defining a pre-determined sized aerosol resistant vent channel between said outer wall of said needle and said vent channel recess formed into said inner wall of said needle hub, and
at least one vent opening in said outer wall of said needle hub in communication with said aerosol resistant vent channel with means for allowing gas diffusion from inside of said sealed container through said aerosol resistant vent channel and through said vent opening to outside of said sealed container when said needle device is inserted into said sealed container.

1 more element

An improved liquid handling needle device for use with a sealed container, said needle device comprising:

a needle hub having a upper and lower end , with an inner wall and an outer wall,
a needle having a upper and lower end, with an inner wall and an outer wall with means for attachment of said outer wall of said upper end of said needle to said inner wall of said needle hub in the vicinity of said lower end of said needle hub and forming a seal therewith,
at least one vent channel recess formed into the outer wall of said needle between said seal and said lower end of said needle hub defining a pre-determined sized aerosol resistant vent channel between said inner wall of said needle hub and said vent channel recess formed into said outer wall of said needle, and
at least one pre-determined vent opening in the outer wall of said needle hub in communication with said aerosol resistant vent channel with means for allowing gas diffusion from inside of said sealed container through said aerosol resistant vent channel and through said vent opening to outside of said sealed container when said needle device is inserted into said sealed container.

1 more element

Dependencies are inferred from the claim text.

Needle venting device for sealed containers

Life of this patent

Needle venting device for sealed containers

Life of this patent

Abstract

Claims24