Blood collection tube holder with slide-activated needle retraction
A blood collection tube holder embodying two coaxially alignable needles, the first needle being a forwardly facing venipuncture needle and the second needle being a rearwardly facing fluid discharge needle. The first and second needles are satisfactorily supported by a frontal attachment and body, respectively, that are disposed in relative sliding engagement along an interface that is transverse to the first and second needle and that extends at least from the second needle to an opening into a needle retraction chamber that projects rearwardly from the body. The subject device is configured to receive and support a conventional blood collection tube of the type used to collect blood samples.
1. A blood collection tube holder comprising:
a body further comprising a rearwardly facing fluid discharge needle and a needle retraction chamber laterally spaced apart from the fluid discharge needle; and
a frontal attachment disposed in transverse sliding relation to the body, the frontal attachment comprising a needle retraction mechanism further comprising a forwardly projecting venipuncture needle that is coaxially aligned with the rearwardly facing fluid discharge needle when the body is disposed in a first position relative to the frontal attachment and that is coaxially aligned with and retractable into the needle retraction chamber when the body is repositioned laterally to a second position relative to the frontal attachment.
2. The blood collection tube holder of claim 1 further comprising a cylindrical receptacle projecting rearwardly from the body, the cylindrical receptacle being configured to receive and support a blood collection tube.
3. The blood collection tube holder of claim 1 further comprising a flash chamber disposed between the venipuncture needle and the fluid discharge needle.
4. The blood collection tube holder of claim 1 wherein the needle retraction mechanism is a needle retraction assembly seated inside the frontal attachment.
5. The blood collection tube holder of claim 4 wherein the needle retraction assembly comprises a needle holder that is rearwardly biased in relation to the frontal attachment.
6. The blood collection tube holder of claim 5 wherein the venipuncture needle is disposed in fluid communication with the needle holder.
7. The blood collection tube holder of claim 1 wherein the fluid discharge needle is seated in fixed relation to the body.
8. The blood collection tube holder of claim 1 wherein the venipuncture needle is selectively retractable relative to the frontal attachment.
9. The blood collection tube holder of claim 2 wherein the fluid discharge needle is configured to be insertable into fluid communication with the blood collection tube.
10. The blood collection tube holder of claim 2 wherein the generally cylindrical receptacle is attachable to the body.
11. The blood collection tube holder of claim 10 wherein the generally cylindrical receptacle threadedly engages the body.
12. The blood collection tube holder of claim 1 wherein the needle retraction chamber has a forwardly facing opening.
13. The blood collection tube holder of claim 2 wherein the needle retraction chamber shares a common wall with the generally cylindrical receptacle and is molded as part of the body.
14. The blood collection tube holder of claim 1 wherein the frontal attachment slidably engages the body along a transverse interface that is substantially perpendicular to the rearwardly facing fluid discharge needle and extends at least from the fluid discharge needle to the needle retraction chamber.
15. The blood collection tube holder of claim 14 wherein relative sliding movement between the frontal attachment and the body can be initiated by applying oppositely directed digital pressure to the frontal attachment and the body, respectively.
16. The blood collection tube holder of claim 15 wherein the oppositely directed digital pressure is applied to oppositely facing touchpads disposed on the frontal attachment and the body, respectively.
17. The blood collection tube holder of claim 1 further comprising at least one interference element disposed between the frontal attachment and the body to mechanically impede relative sliding movement between the frontal attachment and the body prior to retracting at least part of the first needle into the needle retraction chamber.
18. The blood collection tube holder of claim 17 wherein sliding movement is initiated by manually over-pressuring the interference element.