Passive fluid collection device
First Claim
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1. A fluid collection device comprising:
- a first cylinder; and
a second cylinder slidably supported by the first cylinder, wherein at least a portion of the first cylinder flexibly engages the second cylinder to retard relative axial motion of the cylinders.
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Abstract
A fluid collection device is provided having a first cylinder and a second cylinder slidably supported by the first cylinder. At least a portion of the first cylinder flexibly engages the second cylinder to retard relative axial motion of the cylinders. A needle may be mounted to an inner surface of the first cylinder. Upon flexible engagement, the cylinders may contact in a sliding frictional engagement to retard axial motion. The first cylinder may include at least one flexible tab.
44 Citations
30 Claims
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1. A fluid collection device comprising:
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a first cylinder; and
a second cylinder slidably supported by the first cylinder, wherein at least a portion of the first cylinder flexibly engages the second cylinder to retard relative axial motion of the cylinders. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A fluid collection device comprising:
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a holder;
a needle mounted to the holder; and
a sheath supported by the holder and biased between a retracted position and an extended position, wherein at least a portion of the sheath flexibly engages the holder such that the at least a portion of the sheath biases toward the holder in a sliding frictional engagement to retard relative axial motion of the sheath.
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25. A fluid collection device comprising:
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a holder;
a needle mounted to the holder; and
a sheath supported by the holder and biased between a retracted position and an extended position, wherein at least a portion of the holder flexibly engages the sheath such that the at least a portion of the holder biases toward the sheath in a sliding frictional engagement to retard relative axial motion of the sheath.
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26. A blood collection device comprising:
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a holder including a barrel and a pair of flexible tabs formed adjacent a distal end thereof, the holder including a plurality of spaced apart undercuts formed on an interior surface thereof;
a needle assembly having a needle cannula and a needle hub including a hub retention bead and being mounted to an inner surface of the holder; and
a sheath slidably supported within the holder and spring biased from a retracted position to an extended position, the sheath having a pair of sheath extensions being engageable for releasing the sheath from the retracted position, the sheath including a sheath retention bead that releasably engages the hub retention bead in the retracted position, and further including a plurality of axial ribs being disposable between the undercuts, at least one of the axial ribs flexibly engaging the pair of flexible tabs such that the flexible tabs bias toward the sheath in a sliding frictional engagement to retard axial motion of the sheath from the retracted to the extended position, the sheath further including a flange disposed adjacent a proximal end thereof that engages the undercuts of the holder to prevent axial movement of the sheath.
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27. A fluid collection device comprising:
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a first cylinder including flexible means;
a needle assembly including a needle hub means mounted to the first cylinder;
a second cylinder supported by the first cylinder; and
means for translating the second cylinder between a retracted position and an extended position.
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28. A fluid collection device comprising:
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a first cylinder;
a second cylinder slidably supported by the first cylinder and biased toward an extended position; and
an opposing spring disposed between the first cylinder and the second cylinder, the opposing spring biasing the second cylinder toward a retracted position, wherein the bias of the second cylinder toward the extended position overcomes the bias of the opposing spring. - View Dependent Claims (29)
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30. A method for collecting blood, the method comprising the steps:
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providing a blood collection device including;
a first cylinder;
a second cylinder slidably supported by the first cylinder, wherein at least a portion of the first cylinder flexibly engages the second cylinder to retard relative axial motion of the cylinders;
engaging a distal end of the second cylinder to release the second cylinder from a retracted position;
retarding axial movement of the second cylinder;
performing blood collection; and
locking the second cylinder in an extended position.
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Specification