Non-reusable collection device for bodily fluids
A non-reusable device for collecting bodily fluids such as vascular blood from a patient, the device being configured for example to receive a blood collection tube and having a retractable needle attached to a rearwardly biased needle holder that is constrained prior to needle retraction by a rotatably mounted lug ring and that is released during retraction by depressing a trigger pivotably connected to the body of the device to rotate the lug ring, whereby the needle holder is driven into a retraction cavity disposed inside the trigger and the front tip of the needle is retained inside the body of the device.
1. A device useful for collecting bodily fluid from a patient, the device comprising:
a body having a forwardly projecting, rearwardly biased, releasably constrained, selectively retractable needle, the body being configured to receive a fluid collection tube into selectively releasable fluid communication with a rear end of the retractable needle;
an elongate trigger comprising a retraction cavity, a rear portion hinged to the body, an open front portion permitting access to the retraction cavity, and a lug-contacting surface selectively engageable with a lug ring rotatably mounted inside the body;
whereby pivotable movement of the trigger relative to the body following release of the fluid collection tube from the body rotates the lug ring and thereby releases the rearwardly biased needle to retract into the retraction cavity.
2. The device of claim 1 wherein the bodily fluid is blood.
3. The device of claim 1 wherein the fluid collection tube is a blood collection tube.
4. The device of claim 1 wherein the retractable needle has sharp front and rear needle tips.
5. The device of claim 4 wherein the retractable needle has an upwardly facing bevel on the front needle tip and a downwardly facing bevel on the rear needle tip.
6. The device of claim 4 wherein the rear needle tip is surrounded by a flexible elastomeric sheath.
7. The device of claim 6 wherein the sheath is attached to a needle holder seated inside the body.
8. The device of claim 1 wherein the retractable needle is attached to a needle holder seated inside the body.
9. The device of claim 8 wherein the needle holder has a transverse flange.
10. The device of claim 8 wherein a portion of the needle holder projects forwardly of the body.
11. The device of claim 8 wherein the needle holder is constrained by the lug ring.
12. The device of claim 11 wherein the lug ring comprises a centrally disposed aperture alignable with a transverse flange of the needle holder.
13. The device of claim 1 wherein the needle is rearwardly biased by a compressed retraction spring.
14. The device of claim 1 wherein retractable needle is constrained by the lug ring.
15. The device of claim 1 wherein the body comprises an open back end into which a fluid collection tube can be releasably inserted.
16. The device of claim 1 wherein the body comprises an upwardly facing slot.
17. The device of claim 16 wherein the trigger is depressed inside the slot to rotate the lug ring.
18. The device of claim 1 wherein the body comprises at least one transversely projecting flange member.
19. The device of claim 18 wherein the at least one transversely projecting flange member has a substantially flat bottom.
20. The device of claim 1 wherein the activation member of the trigger is a surface engageable with a lug projecting from the lug ring.
21. The device of claim 1 wherein the body, trigger and lug ring are made of molded plastic.