Stop-movement device for elongated medical assembly

1. An apparatus, comprising:

an elongated dilator assembly defining a lumen; and

an elongated needle assembly configured to be receivable and movable within the lumen; and

a stop-movement device having a generally cylindrical body defining a longitudinal interior passage including,

a first inner wall surface having a first interior dimension and configured to engage a portion of the elongated dilator assembly,

a second inner wall surface adjacent the first inner wall surface, the second inner wall surface having a second interior dimension and configured to engage a portion of the elongated needle assembly, the first interior dimension being greater than the second interior dimension, and

a step disposed in the interior passage at an intersection of the first and second inner wall surfaces and configured to be mounted to the elongated needle assembly and the elongated dilator assembly after the elongated needle assembly, in use, is received, at least in part, inside the lumen of the elongated dilator assembly; and

wherein the step of the stop-movement device is configured to contact a proximal end of the elongated dilator assembly so as to inhibit relative movement between the elongated needle assembly and the elongated dilator assembly in a distal direction.

2. The apparatus of claim 1 , wherein: the elongated dilator assembly is configured to be received in a sheath assembly.

3. The apparatus of claim 1 , wherein: the stop-movement device includes an elastically deformable material.

4. The apparatus of claim 1 , wherein:

the stop-movement device is configured to selectively receive, at least in part, and hold onto the elongated dilator assembly and the elongated needle assembly; and

the stop-movement device is configured to selectively release from the elongated dilator assembly and the elongated needle assembly.

5. The apparatus of claim 1 , wherein: the stop-movement device is configured to be friction fitted, at least in part, to a portion of an outer surface of the elongated needle assembly.

6. The apparatus of claim 1 , wherein: the stop-movement device is configured to be friction fitted, at least in part, to a portion of an outer surface of the elongated dilator assembly.

7. The apparatus of claim 1 , wherein:

the second inner wall surface is shaped to fit around, at least in part, a portion of an outer diameter of the elongated needle assembly; and

the first inner wall surface is shaped to fit around, at least in part, a portion of an outer diameter of the elongated dilator assembly.

8. The apparatus of claim 1 , wherein:

the elongated needle assembly is not able to be moved inside and along the elongated dilator assembly after the stop-movement device is positioned to lock the elongated needle assembly with the elongated dilator assembly; and

the elongated needle assembly is movable inside, and along, the elongated dilator assembly after the stop-movement device is removed from the elongated dilator assembly and the elongated needle assembly.

9. The apparatus of claim 1 , wherein: the stop-movement device is configured to selectively fit tightly around, at least in part, the elongated dilator assembly and the elongated needle assembly in such a way that the stop-movement device, in use, selectively locks the elongated dilator assembly and the elongated needle assembly to each other.

10. The apparatus of claim 1 , wherein: the stop-movement device is configured to fit over, at least in part, and lockably engage, at least in part, the elongated dilator assembly and the elongated needle assembly.

11. The apparatus of claim 1 , wherein: the body of the stop-movement device includes a single body member including the first inner wall surface and is configured to frictionally engage a portion of the elongated dilator assembly; and the single body member also includes the second inner wall surface and is configured to frictionally engage a portion of the elongated needle assembly.

12. The apparatus of claim 1 , wherein: the body of the stop-movement device includes: a first body portion defining a first body cavity configured to contact a portion of the elongated needle assembly, a first body groove configured to contact a portion of the elongated dilator assembly and a first step located between the first body cavity and the first body groove; and a second body portion configured to be selectively coupled to the first body portion;

wherein the first body cavity and the first body groove are in fluid communication with each other.

13. The apparatus of claim 12 , wherein:

the second body portion defines a second body cavity configured to contact a portion of the elongated needle assembly;

the second body portion defines a second body groove configured to contact a portion of the elongated dilator assembly;

the second body cavity and the second body groove are in fluid communication with each other; and

the second body portion includes a second step located between the first body cavity and the first body groove.

14. The apparatus of claim 13 , wherein:

the first body cavity and the second body cavity are configured to face each other after the second body portion is selectively mated and connected to the first body portion; and

the first body groove and the second body groove are configured to face each other after the second body portion is selectively mated and connected to the first body portion; and

the first step and the second step are coplanar after the second body portion is selectively mated and connected to the first body portion.

15. The apparatus of claim 14 , wherein:

the first body portion and the second body portion cooperate to define:

a first entrance leading into the first body cavity and the second body cavity after the second body portion is selectively mated and connected to the first body portion; and

a second entrance leading into the second body groove and the first body groove after the second body portion is selectively mated and connected to the first body portion.

16. The apparatus of claim 15 , wherein:

the first body portion provides a first connection protrusion;

the second body portion provides a second connection protrusion;

the first body portion provides a first connection groove;

the second body portion provides a second connection groove,

the first connection protrusion is configured to be securely received into the second connection groove; and

the second connection protrusion is configured to be securely received into the first connection groove.