Needle assembly

• US 20050240161A1
• Filed: 06/29/2005
• Published: 10/27/2005
• Est. Priority Date: 05/02/2002
• Status: Active Grant

• Current Assignee: Becton, Dickinson & Co
• Original Assignee: Becton, Dickinson & Co
• Inventors: Crawford, Jamieson William McLean
• Granted Patent: US 7,678,076 B2
• Time in Patent Office: Days
• US Class Current: 604/264
• CPC Class Codes: A61B 5/15003 for venous or arterial blood
• CPC Class Codes: A61B 5/150389 Hollow piercing elements, e.g. canulas, needles, for piercing the skin
• CPC Class Codes: A61B 5/150519 Details of construction of hub, i.e. element used to attach the single-ended needle to a piercing device or sampling device
• CPC Class Codes: A61B 5/150572 Pierceable protectors, e.g. shields, caps, sleeves or films, e.g. for hygienic purposes
• CPC Class Codes: A61B 5/150641 comprising means to impede repositioning of protection sleeve from covering to uncovering position
• CPC Class Codes: A61B 5/150717 manually removed
• CPC Class Codes: A61B 5/150732 Needle holders, for instance for holding the needle by the hub, used for example with double-ended needle and pre-evacuated tube,
• CPC Class Codes: A61B 5/15074 Needle sets comprising wings, e.g. butterfly type, for ease of handling
• CPC Class Codes: A61B 5/150809 by audible feedback
• CPC Class Codes: A61B 5/150816 by tactile feedback, e.g. vibration
• CPC Class Codes: A61B 5/150916 by blocking components, e.g. piston, driving device or fluid passageway
• CPC Class Codes: A61B 5/154 Devices using pre-evacuated means
• CPC Class Codes: A61M 2005/3212 Blunting means for the sharp end of the needle

Abstract

A blood collection set including a non-patient needle assembly interconnected with an intravenous needle assembly through tubing is provided. The non-patient needle assembly includes a hub assembly adapted for mounting with a blood collection set, and an internal blunting member including a blunted tip. The non-patient needle assembly further includes an external cannula concentric with the internal blunting member and including a non-patient puncture tip adjacent the blunted tip. The external cannula is axially displaceable with respect to the hub assembly between a first retracted position in which the non-patient puncture tip extends beyond the blunted tip and a second activated position in which blunted tip extends beyond the non-patient puncture tip.

Claims

1. A blood collection set comprising:

a) an intravenous needle assembly including a needle having an intravenous puncture tip;

b) a tubing in fluid communication with said intravenous needle assembly; and

c) a non-patient needle assembly in fluid communication with said tubing, said non-patient needle assembly comprising;

i) a hub assembly having opposing first and second ends, said first end in engagement with said tubing,

ii) an internal blunting member in fixed engagement with said hub assembly, said internal blunting member having a first end concentric with said hub assembly, a second end of said blunting member having a blunted tip and an internal lumen extending through said internal blunting member from said first end to said blunted tip, and

iii) an external cannula concentric with said internal blunting member and axially displaceable with respect to said hub assembly, said external cannula including a non-patient puncture tip adjacent said blunted tip of said internal blunting member, said external cannula adapted for axial displacement with respect to said hub assembly between a first retracted position in which said non-patient puncture tip extends beyond said blunted tip of said internal blunting member and a second activated position in which said blunted tip of said internal blunting member extends beyond said non-patient puncture tip of said external cannula.

2. A blood collection set as in claim 1, further comprising a carriage assembly integral with said external cannula and concentric with said internal blunting member, said carriage assembly provided for slidable engagement with said hub assembly.

3. A blood collection set as in claim 1, further comprising a sleeve extending about said non-patient puncture tip.

4. A blood collection set as in claim 1, wherein said hub assembly is removably attached to said tubing.

5. A blood collection set as in claim 4, further comprising a luer fitting between said tubing and said hub assembly.

6. A blood collection set as in claim 1, wherein said non-patient needle assembly further comprises means for attaching said blood collection set to a holder capable of holding blood collection tubes.

7. A blood collection set as in claim 6, wherein said attaching means comprises threads extending circumferentially about said hub assembly.

8. A blood collection set as in claim 1, wherein said external cannula is axially displaceable between said first retracted position and said second activated position in a single axial direction.

9. A blood collection set as in claim 8, further comprising a locking mechanism for preventing axial displacement of said external cannula from said second activated position to said first retracted position.

10. A blood collection set comprising:

a) an intravenous needle assembly including a needle having an intravenous puncture tip;

b) a tubing in fluid communication with said intravenous needle assembly; and

c) a non-patient needle assembly in fluid communication with said tubing, said non-patient needle assembly comprising;

i) a hub assembly having a first end, an opposing second end, and a central opening extending through said hub assembly from said first end to said second end, said first end in engagement with said tubing,

ii) an internal blunting member having a first end, an opposing second end, and an internal lumen extending through said internal blunting member from said first end to said second end, said first end positioned concentrically within said central opening of said hub assembly, said second end having a blunted tip,

iii) a carriage assembly having a first end and an opposed second end, said first end of said carriage assembly extending through said second end of said hub assembly into said central opening of said hub assembly and in sliding engagement with said hub assembly, and

iv) an external cannula extending from said second end of said carriage assembly and concentric with said internal blunting member, said external cannula including a non-patient puncture tip adjacent said blunted tip of said internal blunting member,

wherein sliding of said carriage assembly within said hub assembly causes axial movement of said external cannula about said internal blunting member between a first retracted position in which said non-patient puncture tip extends beyond said blunted tip of said internal blunting member and a second activated position in which said blunted tip of said internal blunting member extends beyond said non-patient puncture tip of said external cannula.