BLOOD SPECIMEN COLLECTION ASSEMBLY
First Claim
1. A blood specimen collection assembly comprising:
- a partially evacuated specimen receptacle;
a body having a chamber provided with a fluid inlet at one end and a fluid outlet at the opposite end, said chamber having a conical sidewall adjacent said fluid inlet and a plurality of radially spaced flutes adjacent said fluid outlet, surrounding said outlet and extending into said chamber;
a hollow needle extending from said one end of the body and in fluid communication with the chamber through said inlet;
a fitting closing said opposite end of the chamber and having said fluid outlet formed therein, said fluid outlet being in communication with said receptacle; and
check valve means in said chamber to permit flow of fluid through said chamber in one direction only, said check valve means including a ball larger in diameter than said fluid inlet and shiftable from a position in engagement with said conical wall whereby to close said fluid inlet and a position supported by said flutes in spaced relationship from said fluid outlet whereby to permit flow of fluid through said chamber, out of said outlet and into said receptacle.
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Accused Products
Abstract
A blood specimen collection assembly having a fluid inlet and a fluid outlet with valve means disposed within the assembly for movement to and from an open and closed position whereby to prevent the backflow of testing fluid from a specimen receptacle, which is coupled with the assembly, into the patient'"'"''"'"'s bloodstream during use of the assembly. The specimen receptacle is in the form of an evacuated container and is coupled with the collection assembly when the same is in use, the receptacle being in communication with the assembly to provide negative pressure through the assembly for opening the valve and withdrawing the specimen, the valve resuming its closed position upon filling of the receptacle.
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Citations
1 Claim
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1. A blood specimen collection assembly comprising:
- a partially evacuated specimen receptacle;
a body having a chamber provided with a fluid inlet at one end and a fluid outlet at the opposite end, said chamber having a conical sidewall adjacent said fluid inlet and a plurality of radially spaced flutes adjacent said fluid outlet, surrounding said outlet and extending into said chamber;
a hollow needle extending from said one end of the body and in fluid communication with the chamber through said inlet;
a fitting closing said opposite end of the chamber and having said fluid outlet formed therein, said fluid outlet being in communication with said receptacle; and
check valve means in said chamber to permit flow of fluid through said chamber in one direction only, said check valve means including a ball larger in diameter than said fluid inlet and shiftable from a position in engagement with said conical wall whereby to close said fluid inlet and a position supported by said flutes in spaced relationship from said fluid outlet whereby to permit flow of fluid through said chamber, out of said outlet and into said receptacle.
- a partially evacuated specimen receptacle;
Specification