Biopsy device and insertable biopsy needle module

摘要

A biopsy device includes a disposable unit including a needle carrier and a biopsy needle. The biopsy needle has a distal portion including a sample chamber and a hub portion located proximal to the sample chamber. The needle carrier has a holding portion. The holding portion and the hub portion are collectively configured to form a detent mechanism configured to permit the biopsy needle to rotate within needle carrier to rotationally position the sample chamber while restraining rotation of the biopsy needle at a series of rotational detent positions.

主权项

1. A biopsy device, comprising:
a disposable unit including a needle carrier and a biopsy needle;
the biopsy needle having a longitudinal axis and a distal portion including a sample chamber;a hub portion connected to the biopsy needle proximal to the sample chamber;a distal portion of the hub portion comprising a polygonal member;the needle carrier having a holding portion, the holding portion comprising two opposing surface engagement portions; wherein the disposable unit is configured such that the polygonal member remains between the two opposing surface engagement portions; wherein the polygonal member is in a detent position when the two opposing surface engagement portions are spaced such that two opposing parallel sides of the polygonal member are substantially parallel to the two opposing surface engagement portions and have a slight gap between each of the opposing parallel sides and the closest opposing engagement portion; wherein the two engagement portions have an elasticity such that the two engagement portions are configured to allow manual rotation of the hub portion to cause the engagement portions to spread apart to allow the polygonal member to rotate through a series of detent positions, and wherein each detent position corresponds to an angular position of the sample chamber specific to that detent position; and wherein the two engagement portions are configured to not spread apart when the resistance of the engagement portions is greater than the applied torque, such that the two engagement portions limit the movement of the polygonal member and thus the movement of the biopsy needle.