Transperineal biopsy guide with access needle support structure having a passage with complementary surfaces with the access needle hub to inhibit rotation thereof
A transperineal biopsy guide configured for use with an access needle and a transrectal imaging probe. The transperineal biopsy guide includes a mount attachable to the transrectal imaging probe and an upper assembly. The upper assembly extending from the mount and including a vertical opening, at least one distal member, and an access needle support structure. The at least one distal member laterally borders the vertical opening and includes a first distal member having a first distal-facing surface. The access needle support structure is aligned with the vertical opening and includes a first passage to receive and support the access needle and a first recess on a proximal-facing side of the access needle support structure. The first recess and the proximal end hub of the access needle including complementary surfaces that interface with each other such that rotation of the access needle within the first passage is inhibited.
1. A transperineal biopsy guide configured for use with an access needle and a perineum 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 comprising a first passage configured to receive and support the access needle and a first recess on a proximal-facing side of the access needle support structure, the first recess being aligned with first passage and configured to receive at least a portion of the proximal end hub when the access needle is received in the first passage, the first recess and the proximal end hub including complementary surfaces that interface when the at least a portion of the proximal end hub is received in the first recess such that rotation of the access needle within the first passage is inhibited,
wherein the access needle support structure is displaceable relative to the at least one distal member.
2. The transperineal biopsy guide of claim 1 , wherein the complementary surfaces comprise longitudinally extending ridges on the proximal end hub and longitudinally extending indents on the first recess.
3. The transperineal biopsy guide of claim 1 , wherein the complementary surfaces comprise threads on the proximal end hub and within the first recess.
4. The transperineal biopsy guide of claim 1 , wherein at least a portion of the first passage includes a cross-section with a circumferential boundary that is cylindrical with radially outward projecting indents at twelve o'clock, three o'clock, six o'clock and nine o'clock.
5. The transperineal biopsy guide of claim 1 , wherein, when the access needle is received in the first passage and the first recess receives at least the portion of the proximal end hub of the access needle, the access needle is secured to the access needle support structure.
6. The transperineal biopsy guide of claim 1 , wherein the access needle support structure is 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.
7. The transperineal biopsy guide of claim 6 , wherein the first passage is configured to support the access needle at a first of the plurality of discrete vertical positions within the vertical opening.
8. The transperineal biopsy guide of claim 7 , wherein the access needle support structure further comprises a second passage configured to support the access needle at a second of the plurality of discrete vertical positions within the vertical opening.
9. The transperineal biopsy guide of claim 1 , wherein the access needle support structure is displaceable relative to the at least one distal member in a proximal-distal direction.
10. The transperineal biopsy guide of claim 9 , wherein the access needle support structure is securable in a distal position relative to the at least one distal member.
11. The transperineal biopsy guide of claim 10 , wherein, in being securable in the distal position, distal displacement of the access needle support structure is prevented by contact with the at least one distal member.
12. The transperineal biopsy guide of claim 11 , wherein, in being securable in the distal position, proximal displacement of the access needle support structure is restrained.
13. The transperineal biopsy guide of claim 12 , wherein proximal displacement is restrained by a ramped surface positioned proximally of the at least one distal member.
14. The transperineal biopsy guide of claim 13 , wherein, in being securable in the distal position, a portion of the access needle support structure is positioned at least partially between the at least one distal member and the ramped surface.
15. The transperineal biopsy guide of claim 10 , wherein, in being securable in the distal position, at least a portion of the access needle support structure is positioned within the vertical opening.
16. 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.
17. The transperineal biopsy guide of claim 1 , wherein at least a distal region of the access needle is configured to be positioned within the imaging plane when: the mount is attached to the transrectal imaging probe; the access needle is supported by the first passage of the access needle support structure; and the access needle passes through the vertical opening.
18. 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.
19. The transperineal biopsy guide of claim 18 , wherein the first distal-facing surface and the second distal-facing surface are planar.
20. The transperineal biopsy guide of claim 1 , further comprising the access needle.