Mechanical Tissue Sample Holder Indexing Device

A biopsy device comprising:

• a. a probe assembly comprising
• i. a cutter configured to sever a tissue sample, wherein the cutter defines a cutter lumen, wherein the cutter lumen is configured to permit proximal communication of the severed tissue sample through the cutter, and
• ii. a tissue sample holder comprising a rotatable member, wherein the rotatable member defines a plurality of chambers, wherein each of the plurality of chambers is configured to be individually placed in fluid communication with the cutter lumen, wherein each of the plurality of chambers is configured to receive a severed tissue sample while in fluid communication with the cutter lumen;
• and
• b. a holster assembly comprising a non-motorized rotation mechanism, wherein the non-motorized rotation mechanism comprises at least one actuator configured to be triggered by a user to initiate an actuation stroke to successively align consecutive chambers with the cutter lumen to successively collect a discrete severed tissue sample in each one of the plurality of chambers during use of the biopsy device.

A biopsy device comprising:

• a. a holster assembly comprising a tissue sample holder rotation mechanism, wherein the tissue sample holder rotation mechanism comprises
• i. a first button, wherein the button is configured to transition between a first position and a second position during an actuation stroke,
• ii. a first lever in mechanical communication with the first button,
• iii. a first pawl connected to the first lever,
• iv. a first ratchet comprising a first central opening and a first plurality of teeth, wherein the first pawl engages at least one of the first plurality of teeth,
• v. an indexing shaft positioned to pass through the first central opening of the first ratchet, and
• vi. a first gear mounted on the indexing shaft, wherein the first gear is configured to rotate unitarily with the indexing shaft, wherein the first ratchet, the indexing shaft, and the first gear rotate during the actuation stroke initiated by the first button;
• and
• b. a probe assembly comprising
• i. a tissue sample holder comprising a rotatable member, wherein the rotatable member of the tissue sample holder comprises a central recess and a plurality of tissue chambers,
• ii. a tissue sample holder shaft configured to engage the central recess of the rotatable member of the tissue sample holder such that the tissue sample holder shaft and the rotatable member of the tissue sample holder rotate unitarily, and
• iii. a second gear mounted on the tissue sample holder shaft such that the second gear and the tissue sample holder shaft rotate unitarily, wherein the second gear is configured to engage the first gear of the indexing shaft to allow rotation of the indexing shaft to be communicated to the tissue sample holder shaft and the rotatable member of the tissue sample holder.