Bone marrow aspiration needle

1. An aspiration assembly comprising:

an outer cannulated needle having a first tip at a first end and a first coupling device at a second end that is opposite to the first end;

a threaded collar having a second coupling device in cooperation with the first coupling device to removably couple the threaded collar to the outer cannulated needle; and

an inner aspiration needle having a second tip at a third end, a third coupling device at a fourth end opposite to the third end, and a threaded portion proximate to the fourth end;

wherein the inner aspiration needle is inserted within the outer cannulated needle such that the second tip of the inner aspiration needle extends beyond the first tip of the outer cannulated needle and the threaded portion of the inner aspiration needle threadably engages the threaded collar;

wherein the distance that the second tip of the inner aspiration needle extends from the first tip of the outer cannulated needle increases when the inner aspiration needle is rotated in a first direction relative to the outer cannulated needle; and

wherein the distance that the second tip of the inner aspiration needle extends from the first tip of the outer cannulated needle decreases when the inner aspiration needle is rotated in a second direction relative to the outer cannulated needle, the second direction is opposite to the first direction.

2. The aspiration assembly of claim 1 , wherein the outer cannulated needle further includes a handle proximate to the second end.

3. The aspiration assembly of claim 1 , wherein the first tip of the outer cannulated needle is pointed.

4. The aspiration assembly of claim 1 , wherein the threaded collar is mounted to the outer cannulated needle with a Leur lock.

5. The aspiration assembly of claim 1 , wherein the threaded collar includes internal threads.

6. The aspiration assembly of claim 1 , wherein the second tip of the inner aspiration needle includes a plurality of ports spaced apart around an outer circumference of the needle adjacent to the second tip.

7. The aspiration assembly of claim 1 , wherein the inner aspiration needle includes a Luer lock attachment at the fourth end to permit cooperation with an aspiration syringe.

8. The aspiration assembly of claim 1 , wherein the inner aspiration needle is cannulated; and

wherein the third coupling device includes a Luer lock attachment configured to cooperate with a stylet, a third tip of the stylet extends beyond the second tip of the inner aspiration needle when the stylet is inserted within the inner aspiration needle and the Luer lock attachment of the stylet is connected to the inner aspiration needle.

9. The aspiration assembly of claim 1 , wherein the first coupling device is substantially similar to the third coupling device.

10. An aspiration assembly comprising:

an outer cannulated needle having a first tip at a first end, a first coupling device at a second end that is opposite to the first end, and a handle;

a collar having first internal threads and a second coupling device having second internal threads that are spaced apart from and discontinuous with the first internal threads, the second coupling device is configured to cooperate with the first coupling device to removably couple the collar to the outer cannulated needle;

an inner aspiration needle having a second tip at a third end, a third coupling device substantially similar to the first coupling device at a fourth end opposite to the third end, a threaded portion proximate to the fourth end, and a first needle portion between the second tip of the inner aspiration needle and the fourth end of the inner aspiration needle, the threaded collar is configured to entirely receive the threaded portion; and

a rigid stylet having a third tip at a fifth end, an interlocking device at a sixth end that is configured to independently cooperate with each of the first coupling device and the third coupling device, and a second needle portion extending between the third tip of the stylet and the interlocking device;

wherein the assembly includes a first configuration in which the rigid stylet mates with the first coupling device of the outer cannulated needle, the second needle portion of the stylet extends through the needle first tip of the outer cannulated needle, and the third tip of the rigid stylet extends beyond the first tip of the outer cannulated needle; and

wherein the assembly includes a second configuration in which the collar is mounted to the first coupling device of the outer cannulated needle, the inner aspiration needle is connected to the collar through cooperation between the first internal threads of the collar and the threaded portion of the inner aspiration needle such that an entirety of the threaded portion engages the first internal threads, the first needle portion of the inner aspiration needle extends through the first tip of the outer cannulated needle, and the second tip of the inner aspiration needle extends beyond the first tip of the outer cannulated needle.

11. The aspiration assembly of claim 10 , wherein the distance that the second tip of the inner aspiration extends from the needle first tip of the outer cannulated needle increases when the inner aspiration needle is rotated with respect to the outer cannulated needle.

12. The aspiration assembly of claim 10 , wherein the collar is mounted to the handle with a Luer lock.

13. The aspiration assembly of claim 10 , wherein the second tip of the inner aspiration needle includes a plurality of ports spaced apart around an outer surface of the second tip.

14. The aspiration assembly of claim 10 , wherein the inner aspiration needle includes a Luer lock attachment at the fourth end to permit cooperation with an aspiration syringe.

15. The aspiration assembly of claim 10 , wherein the handle defines a recess for a Luer lock.

16. The aspiration assembly of claim 10 , wherein the collar is one of integral with the outer cannulated needle or removably mounted to the outer cannulated needle.

17. An aspiration assembly comprising:

an outer cannulated needle having a first tip at a first end, a first coupling device at a second end that is opposite to the first end, and a handle;

a collar having first internal threads and a second coupling device having second internal threads that are spaced apart from and discontinuous with the first internal threads, the second coupling device is configured to cooperate with the first coupling device to removably couple the collar to the outer cannulated needle;

an inner aspiration needle having an open second tip at a third end, a connection device at a fourth end that is opposite to the third end, a threaded portion proximate to the fourth end, and a first needle portion between the second tip of the inner aspiration needle and the fourth end of the inner aspiration needle; and

a stylet having a third tip at a fifth end, an interlocking device at a sixth end, and a second needle portion extending between the third tip of the stylet and the interlocking device;

wherein the collar is mounted to the first coupling device of the outer cannulated needle;

wherein the inner aspiration needle is connected to the collar through cooperation between the first internal threads of the collar and an entirety of the threaded portion of the inner aspiration needle, the first needle portion of the inner aspiration needle extends through the needle first tip of the outer cannulated needle, and the second tip of the inner aspiration needle extends beyond the first tip of the outer cannulated needle; and

wherein the stylet is connected to the inner aspiration needle through cooperation between the interlocking device of the stylet and the connection device of the inner aspiration needle, the second needle portion of the stylet extends through the open second tip of the inner aspiration needle and the third tip of the stylet extends beyond the open second tip of the inner aspiration needle.

18. The aspiration assembly of claim 17 , wherein the stylet is rigid.

19. The aspiration assembly of claim 17 , wherein the distance that the second tip of the inner aspiration needle extends from the first tip of the outer cannulated needle increases when the inner aspiration needle is rotated with respect to the outer cannulated needle.

20. The aspiration assembly of claim 17 , wherein the collar is mounted to the handle with a Luer lock.

21. The aspiration assembly of claim 17 , wherein the connection device of the inner aspiration needle includes a Luer lock attachment to permit cooperation with an aspiration syringe.

22. The aspiration assembly of claim 17 , wherein the handle defines a recess for a Luer lock.

23. An aspiration assembly comprising:

an outer cannulated needle having an open tip including:

a first locking device longitudinally aligned with the open tip, the first locking device including first external threads;

a handle between the open tip and the first locking device; and

an outer passageway defined by a body of the outer cannulated needle that extends from the open tip to the first locking device and entirely through the first locking device;

a collar including:

a first end and a second end opposite to the first end;

a bore defined by the collar that extends between the first end and the second end, the bore includes:

a first bore portion including first internal threads proximate to the first end and a first diameter portion; and

a second bore portion that is non-threaded and proximate to the second end that has a second diameter that is smaller than the first diameter;

a second locking device at the second end configured to cooperate with the first locking device to secure the collar to the outer cannulated needle, the second locking device includes:

a recessed portion that surrounds the second bore portion and is recessed within the second end; and

second internal threads within the recessed portion that are configured to cooperate with the first external threads of the first locking device;

a port extension at an axial center of the recessed portion that extends beyond the second end of the collar, the port extension defines a portion of the second bore portion;

an inner aspiration needle including:

a third locking device at a third end, the third locking device includes second external threads and is substantially similar to the first locking device;

a closed, pointed tip at a fourth end that is opposite to the third end;

an inner passageway defined by an inner body of the inner aspiration needle that extends from about the third end to the fourth end, the inner passageway terminates at an opening defined by the third locking device;

a plurality of ports proximate to the pointed tip to provide fluid communication between the ports and the third end; and

a threaded portion between the third end and the fourth end, the threaded portion is configured to cooperate with, and be entirely received by, the threaded bore of the collar; and

a rigid stylet having a closed stylet tip at a fifth end and a fourth locking device at a sixth end that is opposite to the fifth end, the fourth locking device includes a cap with internal threads, the fourth locking device is configured to independently cooperate with each one of the third locking device of the inner aspiration needle and the first locking device of the outer cannulated needle.

24. The aspiration assembly of claim 23 , wherein the collar is coupled to the outer cannulated needle and the inner aspiration needle is inserted within the outer cannulated needle such that the closed, pointed tip of the inner aspiration needle extends beyond the open tip of the outer cannulated needle and the second internal threads of the inner aspiration needle threadably engage the second internal threads of the collar.

25. The aspiration assembly of claim 24 , wherein a distance that the closed, pointed tip of the inner aspiration needle extends from the open tip of the outer cannulated needle increases when the inner aspiration needle is rotated in a first direction relative to the outer cannulated needle; and wherein the distance that the closed, pointed tip of the inner aspiration needle extends from the open tip of the outer cannulated needle decreases when the inner aspiration needle is rotated in a second direction that is opposite to the first direction.

26. The aspiration assembly of claim 23 , wherein rigid stylet is mounted to one of the third locking device of the inner aspiration needle or the first locking device of the outer cannulated needle such that the closed stylet tip extends through the open tip of the outer cannulated needle.

27. The aspiration assembly of claim 23 , wherein the first locking device includes a Luer lock and the third locking device includes a Luer lock.

28. The aspiration assembly of claim 23 , wherein the plurality of ports of the inner aspiration needle are spaced apart around an outer circumference of the inner aspiration needle

29. The aspiration assembly of claim 23 , wherein the third locking device includes a Luer lock attachment configured to cooperate with an aspiration syringe.

30. The aspiration assembly of claim 23 , wherein the first locking device of the outer cannulated needle and the second locking device of the collar are unitary.