Vacuum assisted biopsy device
First Claim
1. A biopsy device, comprising:
- a cutting element mounted to a handpiece, said cutting element comprising;
a stylet assembly having a stylet that includes an open proximal end and a tissue opening at a distal end thereof, wherein the tissue receiving opening is in communication with a lumen extending through the stylet, wherein the stylet is formed with a blunt distal end; and
an outer cannula assembly including an outer cannula that is slidably mounted over the stylet and having an open distal end with a cutting edge formed thereon; and
a vacuum chamber in communication with the lumen;
wherein the stylet is selectively advanced distally outwardly with respect to the outer cannula to open the tissue opening to targeted tissue;
wherein the outer cannula assembly is actuated so as to at least partially expand the vacuum chamber to generate vacuum, wherein the outer cannula is automatically advanced over the tissue opening after the vacuum chamber is at least partially expanded so as to sever tissue, the vacuum causing tissue to be drawn into and maintained in the tissue opening while the cutting cannula severs tissue to obtain a biopsy core.
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Accused Products
Abstract
A biopsy device is disclosed that comprises a cutting element mounted to a handpiece and a vacuum chamber. The cutting element comprises a stylet assembly and an outer cannula assembly. The stylet assembly includes a stylet that includes an open proximal end and a tissue opening at a distal end thereof. The distal end of the stylet is blunt-shaped. The tissue receiving opening is in communication with a lumen extending through the stylet. The outer cannula assembly includes an outer cannula that is slidably mounted over the stylet and has an open distal end with a cutting edge formed thereon. The vacuum chamber is in communication with the lumen of the stylet. The stylet is selectively advanced distally outwardly with respect to outer cannula to expose the tissue opening to targeted tissue. The outer cannula is selectively advanced over the tissue opening to sever tissue, while vacuum is generated in the vacuum chamber and delivered to the tissue opening through the lumen. The vacuum causes tissue to be drawn into and maintained in the tissue opening while the outer cannula severs tissue to obtain a biopsy core.
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Citations
19 Claims
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1. A biopsy device, comprising:
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a cutting element mounted to a handpiece, said cutting element comprising; a stylet assembly having a stylet that includes an open proximal end and a tissue opening at a distal end thereof, wherein the tissue receiving opening is in communication with a lumen extending through the stylet, wherein the stylet is formed with a blunt distal end; and an outer cannula assembly including an outer cannula that is slidably mounted over the stylet and having an open distal end with a cutting edge formed thereon; and a vacuum chamber in communication with the lumen; wherein the stylet is selectively advanced distally outwardly with respect to the outer cannula to open the tissue opening to targeted tissue; wherein the outer cannula assembly is actuated so as to at least partially expand the vacuum chamber to generate vacuum, wherein the outer cannula is automatically advanced over the tissue opening after the vacuum chamber is at least partially expanded so as to sever tissue, the vacuum causing tissue to be drawn into and maintained in the tissue opening while the cutting cannula severs tissue to obtain a biopsy core. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification