Biopsy needle assembly
A biopsy needle assembly for excising a tissue specimen from a target tissue in an animal includes a mandrel with a core bed having an inner surface forming a projection for marking the tissue specimen at excision. The projections can be longitudinal and transverse in the core bed, and can project from an end of the core bed into the core bed. The projections can include a marking agent for marking the tissue specimen.
1. A biopsy needle for excising a tissue specimen from a target tissue, comprising:
a body extending longitudinally between a proximal end and a distal end about a longitudinally-extending central axis, wherein the body forms a core bed adjacent the distal end;
wherein the core bed forms a cavity with an inner surface extending longitudinally from a first end and a second end, and laterally between a first longitudinal edge and an opposing second longitudinal edge;
wherein the inner surface forms a transverse ridge extending between the first longitudinal edge and second longitudinal edge marking the tissue specimen;
wherein the second end forms a projection extending into the cavity marking the tissue specimen.
2. The needle of claim 1 , comprising a plurality of adjacent transverse ridges.
3. The needle of claim 2 , wherein the plurality of transverse ridges are grouped adjacent the second end.
4. The needle of claim 1 , wherein the second end projection a contact surface includes a marking agent for marking the distal end of the tissue specimen.
5. The needle of claim 1 , wherein the transverse ridge presents a contact surface for marking the tissue specimen.
6. The needle of claim 5 , wherein the contact surface includes a marking agent for marking the tissue specimen.
7. The needle of claim 1 , wherein:
the inner surface defines an upwardly open lower cavity; and
the first longitudinal edge and second longitudinal edge form the upper edges of the lower cavity.
8. The needle of claim 7 , wherein the upwardly open cavity has a C-shaped cross sectional configuration.
9. The needle of claim 7 , wherein the upwardly open cavity has a box-shaped cross sectional configuration.
10. The needle of claim 7 , wherein the first longitudinal edge and second longitudinal edge are disposed at a horizontal plane coincident with the central axis, and the bottom of the lower cavity is disposed below the central axis.
11. The needle of claim 7 , wherein the first longitudinal edge and second longitudinal edge are disposed above a horizontal plane coincident with the central axis, and the bottom of the lower cavity is disposed below the central axis.
12. A biopsy needle for excising a tissue specimen from a target tissue, comprising:
a body extending longitudinally between a proximal end and a distal end about a longitudinally-extending central axis, wherein the body forms a core bed adjacent the distal end;
wherein the core bed forms a cavity with an inner surface extending longitudinally from a first end and a second end, and laterally between a first longitudinal edge and an opposing second longitudinal edge;
wherein the inner surface forms a transverse ridge extending between the first longitudinal edge and second longitudinal edge; and
wherein the ridge presents a contact surface for marking the tissue specimen.
13. The needle of claim 12 , wherein the ridge comprises a plurality of adjacent ridges grouped adjacent the second end.
14. The needle of claim 12 , wherein the contact surface includes a marking agent for marking the tissue specimen.
15. The needle of claim 12 , wherein:
the second end forms a projection extending into the cavity; and
wherein the projection includes a contact surface with a marking agent for marking the distal end of the tissue specimen.
16. The needle of claim 12 , wherein:
the inner surface defines an upwardly open lower cavity; and
the first longitudinal edge and second longitudinal edge form the upper edges of the lower cavity.
17. The needle of claim 16 , wherein the upwardly open cavity has a C-shaped cross sectional configuration.
18. The needle of claim 16 , wherein the upwardly open cavity has a box-shaped cross sectional configuration.
19. The needle of claim 16 , wherein the first longitudinal edge and second longitudinal edge are disposed at a horizontal plane coincident with the central axis, and the bottom of the lower cavity is disposed below the central axis.
20. The needle of claim 16 , wherein the first longitudinal edge and second longitudinal edge are disposed above a horizontal plane coincident with the central axis, and the bottom of the lower cavity is disposed below the central axis.
21. A biopsy needle for excising a tissue specimen from a target tissue, comprising:
a body extending longitudinally between a proximal end and a distal end about a longitudinally-extending central axis, wherein the body forms a core bed adjacent the distal end;
wherein the core bed forms a cavity with an inner surface extending longitudinally from a first end and a second end, and laterally between a first longitudinal edge and an opposing second longitudinal edge; and
wherein the second end forms a projection extending into the cavity presenting a contact surface for marking the distal end of the tissue specimen.
22. The needle of claim 21 , wherein the second end projection contact surface includes a marking agent for marking the tissue specimen.
23. The needle of claim 21 , wherein the inner surface forms a plurality of adjacent transverse ridges adjacent the second end extending between the first longitudinal edge and the second longitudinal edge.
24. The needle of claim 23 , wherein the transverse ridges present a contact surface with a marking agent for marking the tissue specimen.
25. The needle of claim 21 , wherein:
the inner surface defines an upwardly open lower cavity; and
the first longitudinal edge and second longitudinal edge form the upper edges of the lower cavity.
26. The needle of claim 25 , wherein the upwardly open cavity has a C-shaped cross sectional configuration.
27. The needle of claim 25 , wherein the upwardly open cavity has a box-shaped cross sectional configuration.
28. The needle of claim 25 , wherein the first longitudinal edge and second longitudinal edge are disposed at a horizontal plane coincident with the central axis, and the bottom of the lower cavity is disposed below the central axis.
29. The needle of claim 25 , wherein the first longitudinal edge and second longitudinal edge are disposed above a horizontal plane coincident with the central axis, and the bottom of the lower cavity is disposed below the central axis.