Transperineal biopsy guide with access needle support structure supporting an access needle at various vertical positions within a vertical opening of the guide
A transperineal biopsy guide configured for use with an access needle and a transrectal imaging probe. The transperineal biopsy guide may include a mount attachable to the transrectal imaging probe and an upper assembly. The upper assembly may extend from the mount and may include a vertical opening, at least one distal member, and an access needle support structure. The access needle support structure is aligned with the vertical opening and supports the access needle at a plurality of discrete vertical positions within the vertical opening relative to the transrectal imaging probe. The access needle support structure is displaceable relative to the at least one distal member. And the at least one distal member limits distal displacement of the access needle support structure relative to the at least one distal member.
1. A transperineal biopsy guide configured for use with an access needle and a transrectal imaging probe adjacent a patient's perineum, the access needle including a proximal end hub, a distal sharp end opposite the proximal end hub and a longitudinal axis extending between the proximal end hub and the distal sharp end, the access needle sized to receive a biopsy instrument therethrough, the transrectal imaging probe including a proximal end, a distal end and a longitudinal axis extending between the proximal end and the distal end, the transrectal imaging probe configured to provide imaging in an imaging plane of the transrectal imaging probe, the transperineal biopsy guide comprising:
a mount attachable to the transrectal imaging probe between the proximal and distal ends of the transrectal imaging probe; and
an upper assembly extending from the mount and including:
a vertical opening;
at least one distal member laterally bordering the vertical opening, the at least one distal member comprising a first distal member comprising a first distal-facing surface; and
an access needle support structure aligned with the vertical opening and configured to support the access needle at a plurality of discrete vertical positions within the vertical opening relative to the transrectal imaging probe when the mount is attached to the transrectal imaging probe and the access needle is supported by the access needle support structure,
wherein the access needle support structure is displaceable relative to the at least one distal member, and wherein the at least one distal member limits distal displacement of the access needle support structure relative to the at least one distal member.
2. The transperineal biopsy guide of claim 1 , wherein the at least one distal member further comprises a second distal member comprising a second distal-facing surface, the vertical opening being defined between the first distal member and the second distal member.
3. The transperineal biopsy guide of claim 2 , wherein the first distal member further comprises a first proximal-facing surface opposite the first distal-facing surface, and the second distal member further comprises a second proximal-facing surface opposite the second distal-facing surface, and wherein distal displacement of the access needle support structure relative to the at least one distal member is limited by the access needle support structure contacting the first proximal-facing surface and the second proximal facing surface.
4. The transperineal biopsy guide of claim 2 , wherein the first distal-facing surface and the second distal-facing surface are planar.
5. The transperineal biopsy guide of claim 2 , wherein the access needle support structure is displaceable proximally-distally relative to the first distal member and the second distal member.
6. The transperineal biopsy guide of claim 5 , wherein, in being displaceable proximally-distally relative to the first distal member and the second distal member, the access needle support structure is moveable into and out of the vertical opening.
7. The transperineal biopsy guide of claim 5 , wherein the access needle support structure is securable in a distal position relative to the first distal member and the second distal member.
8. The transperineal biopsy guide of claim 7 , wherein the first distal member further comprises a first proximal-facing surface opposite the first distal-facing surface, and the second distal member further comprises a second proximal-facing surface opposite the second distal-facing surface, and wherein, in being securable in the distal position, a first portion of the access needle support structure abuts or is adjacent the first proximal-facing surface and a second portion of the access needle support structure abuts or is adjacent the second proximal-facing surface.
9. The transperineal biopsy guide of claim 8 , wherein the upper assembly further includes a first ramped surface and a second ramped surface, the first ramped surface spaced apart from the first proximal-facing surface, the second ramped surface spaced apart from the second proximal-facing surface, and wherein, in being securable in the distal position, the first portion of the access needle support structure is positioned at least partially between the first proximal-facing surface and the first ramped surface and the second portion of the access needle support structure is positioned at least partially between the second proximal-facing surface and the second ramped surface.
10. The transperineal biopsy guide of claim 1 , wherein the vertical opening is in a fixed position relative to the transrectal imaging probe when the mount is attached to the transrectal imaging probe.
11. The transperineal biopsy guide of claim 1 , wherein the access needle support structure includes at least one passage through which the access needle extends to pass through the vertical opening.
12. The transperineal biopsy guide of claim 11 , wherein the at least one passage is configured to support the access needle at one of the pluralities of discrete vertical positions within the opening.
13. The transperineal biopsy guide of claim 12 , wherein the at least one passage comprises multiple passages stacked in an evenly spaced arrangement.
14. The transperineal biopsy guide of claim 1 , wherein at least a portion of the upper assembly is distally cantilevered relative to a portion of the mount that extends around the transrectal imaging probe when the mount is attached to the transrectal imaging probe.
15. The transperineal biopsy guide of claim 1 , wherein the access needle is configured to be supported at the plurality of discrete vertical positions within the vertical opening via a plurality of vertically dispersed evenly spaced-apart receiving structures of the upper assembly.
16. The transperineal biopsy guide of claim 15 , wherein the plurality of vertically dispersed evenly spaced-apart receiving structures is a plurality of vertically dispersed evenly spaced-apart passages of the access needle support structure, each of the plurality of vertically dispersed evenly spaced-apart passages configured to receive the access needle.
17. The transperineal biopsy guide of claim 1 , wherein the access needle support structure can be distally displaced relative to the at least one distal member to cause the access needle to at least one of enter, or become increasingly distally extended through, the vertical opening.
18. The transperineal biopsy guide of claim 17 , wherein the distal displacement of the access needle support structure relative to the at least one distal member causes the access needle to be at least one of positioned, or increasingly positioned, within the imaging plane when the access needle is supported by the access needle support structure and the mount is attached to the transrectal imaging probe.
19. The transperineal biopsy guide of claim 17 , wherein distally displacing the access needle support structure causes the access needle support structure to move into the vertical opening.
20. The transperineal biopsy guide of claim 17 , wherein the upper assembly further includes a stop feature and distally displacing the access needle support structure causes a portion of the access needle support structure to be engaged by the stop feature, thereby holding the access needle support structure in a distal position relative to the vertical opening.
21. The transperineal biopsy guide of claim 20 , wherein the stop feature is a fixed proximal distance from a proximal facing-surface of the at least one distal member.
22. The transperineal biopsy guide of claim 17 , wherein the upper assembly further includes a ramp feature having an apex, wherein distally displacing the access needle support structure causes a portion of the access needle support structure to ride up and over the ramp feature, wherein when the portion of the access needle support structure has distally passed the apex of the ramp feature, the access needle support structure is held by the ramp feature in the distal position of the access needle support structure relative to the distal-facing vertical opening.
23. The transperineal biopsy guide of claim 22 , wherein the ramp feature distally slopes upward until the apex, at which point the ramp distally slopes downward, the portion of the access needle support structure being distal the apex when the access needle support structure is held by the ramp feature in the distal position of the access needle support structure relative to the distal facing vertical opening.
24. The transperineal biopsy guide of claim 17 , wherein the upper assembly further includes spaced-apart lateral sidewalls defining a channel therebetween, the channel extending distal-proximal and aligning with the vertical opening, the access needle support structure having opposite lateral sides that displace along the lateral sidewalls when the access needle support structure is distally displaced relative to the at least one distal-facing surface.
25. The transperineal biopsy guide of claim 24 , wherein at least one of the spaced-apart lateral sidewalls and at least one of the opposite lateral sides have a complementary mechanically meshed interface with each other that allows the at least one of the opposite lateral sides to slide along the at least one of the spaced-apart lateral sidewalls.
26. The transperineal biopsy guide of claim 25 , wherein the complementary mechanically meshed interface includes a male linearly extending member slidably received within a female linearly extending recess.
27. The transperineal biopsy guide of claim 26 , wherein the male linearly extending member is part of the at least one of the opposite lateral sides, and the female linearly extending recess is defined in the at least one of the spaced-apart lateral sidewalls.
28. The transperineal biopsy guide of claim 1 , wherein, when the mount is attached to the transrectal imaging probe and the access needle is supported by the access needle support structure and passes through the vertical opening, at least a distal region of the access needle is positioned within the imaging plane.
29. The transperineal biopsy guide of claim 1 , further comprising the access needle.
30. The transperineal biopsy guide of claim 29 , wherein a proximal-facing side of the access needle support structure includes a recess aligned with a passage for receiving the access needle, the proximal end hub of the access needle and the recess including complementary surfaces that inhibit rotation of the access needle within the passage.