Total core biopsy device and method of use

摘要

Total core biopsy devices and methods of use are provided for taking a total core biopsy sample and a means for using the devices that provide for an adequate sample size and quality while being light-weight, easy to use, small, inexpensive, and permitting one-handed operation and beveled edges to reduce trauma to the surrounding tissue and organs from which a total core biopsy sample may be taken.

主权项

1. A biopsy device comprising:
an outer cannula having a proximal portion, a distal portion, and a lumen extending between the proximal portion and the distal portion, wherein the distal portion comprises a movable cutting edge configured for cutting an end portion of a biopsy sample; an inner cannula having a proximal portion, a distal portion, and a lumen extending between the proximal portion and the distal portion configured for accepting a core biopsy sample, wherein the distal portion of the inner cannula comprises an angled distal end having a cutting edge configured for cutting a circumferential side portion of the biopsy sample without rotation, wherein the inner cannula is partially disposed within the lumen of the outer cannula, and wherein the inner cannula is configured for axial movement out from and distally beyond the cutting edge of the outer cannula; wherein the cutting edge of the inner cannula is beveled; and wherein the cutting edge of the outer cannula is biased to close the lumen of the outer cannula and retain the biopsy sample there within, and wherein the cutting edge of the inner cannula is configured to open the lumen of the outer cannula when a force is applied to an inside surface of the cutting edge of the outer cannula by axial distal movement of the inner cannula, and wherein the cutting edge of the outer cannula further comprises a unitary flap, the flap movable between a folded configuration and a unfolded configuration, the lumen of the outer cannula being closed when the flap is in the folded configuration, and the lumen of the outer cannula being open when the flap is in the unfolded configuration.