Blood sampling syringe
First Claim
1. A syringe for sampling bodily fluids, such as blood or the like, from a patient, said syringe comprising:
- a first sleeve member and a second sleeve member disposed for relative shifting;
said first sleeve member including a first receiving chamber, and said second sleeve member including a second receiving chamber said first receiving chamber being relatively shiftably disposed within said second receiving chamber;
sealing means being disposed between said first receiving chamber and said second receiving chamber for sealing engagement therebetween;
means for mounting a needle associated with said first sleeve member for holding a needle in operative connection with said first receiving chamber so that bodily fluids can pass from a needle into said first receiving chamber;
filter means disposed in at least one of said first and said second sleeve members for permitting gas flow but prohibiting bodily fluid flow therethrough;
said first receiving chamber communicating with said second receiving chamber through said filter means; and
proper relative shifting of said sleeve members causing gas within said first receiving chamber to flow through said filter means into said second receiving chamber, thereby causing bodily fluid to flow into said first receiving chamber.
2 Assignments
0 Petitions
Accused Products
Abstract
A syringe for sampling bodily fluids, such as blood and the like, from a patient, comprises a first sleeve member and a second sleeve member disposed for relative shifting. The first sleeve member includes a first receiving chamber, and the second sleeve member includes a second receiving chamber. A needle mount is disposed on the first sleeve member for holding a needle in operative connection with the first receiving chamber so that bodily fluids can pass from the needle into the first receiving chamber. A filter is disposed in at least one of the first and the second sleeve members for permitting gas flow but prohibiting bodily fluid flow therethrough. The first receiving chamber communicates with the second receiving chamber through the filter so that relative shifting of the sleeve members causes gas within the first receiving chamber to flow through the filter into the second receiving chamber, thereby causing bodily fluid to flow into a first receiving chamber.
-
Citations
18 Claims
-
1. A syringe for sampling bodily fluids, such as blood or the like, from a patient, said syringe comprising:
- a first sleeve member and a second sleeve member disposed for relative shifting;
said first sleeve member including a first receiving chamber, and said second sleeve member including a second receiving chamber said first receiving chamber being relatively shiftably disposed within said second receiving chamber;
sealing means being disposed between said first receiving chamber and said second receiving chamber for sealing engagement therebetween;
means for mounting a needle associated with said first sleeve member for holding a needle in operative connection with said first receiving chamber so that bodily fluids can pass from a needle into said first receiving chamber;
filter means disposed in at least one of said first and said second sleeve members for permitting gas flow but prohibiting bodily fluid flow therethrough;
said first receiving chamber communicating with said second receiving chamber through said filter means; and
proper relative shifting of said sleeve members causing gas within said first receiving chamber to flow through said filter means into said second receiving chamber, thereby causing bodily fluid to flow into said first receiving chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- a first sleeve member and a second sleeve member disposed for relative shifting;
-
8. A syringe for sampling blood from a patient, the syringe comprising:
- an inner tube and an outer tube coaxially disposed for relative axial shifting;
means operatively connected to the inner tube for allowing blood flow into said inner tube responsive to the axial shifting;
hydrophobic filter means operatively connecting said inner tube to said outer tube for permitting gas flow and for prohibiting blood flow to and from said inner tube into and out of said outer tube responsive to said axial shifting;
a reduced pressure generated in the inner tube by gas flow from said inner tube into said outer tube through said filter means;
the reduced pressure causing blood to flow from said means for allowing blood flow into said inner tube; and
manipulation means operatively connected to said inner tube and said outer tube for facilitating said axial shifting. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
- an inner tube and an outer tube coaxially disposed for relative axial shifting;
-
16. A device for sampling fluids comprising:
- a first tube and a second tube coaxially disposed for relative axial shifting;
means operatively connected to the first tube for allowing fluid flow into said first tube;
filter means operatively connecting said first tube with said second tube for allowing gas flow and for prohibiting fluid flow from said first tube into said second tube responsive to relative axial shifting of said first tube and said second tube;
said relative axial shifting generating a reduced pressure within said first tube by drawing gas through the filter means from said first tube into said second tube; and
the reduced pressure drawing fluid into said first tube. - View Dependent Claims (17, 18)
- a first tube and a second tube coaxially disposed for relative axial shifting;
Specification