Biopsy device
First Claim
1. A method of extracting a tissue sample from a biopsy device comprising:
- providing a cannula fluidly connected to a chamber, the chamber having a body having a distal end, a proximal end;
at least one first recessed area extending along an inner wall of the body, proximate the proximal end of the body of the chamber, wherein the at least one first recessed area is configured to release positive pressure generated within the chamber;
at least one second recessed area extending along the inner wall of the body, proximate the distal end of the body of the chamber, wherein the at least one second recessed area is configured to release negative pressure generated within the chamber;
inserting the cannula into a patient'"'"'s body;
generating a negative pressure environment in the chamber relative to an atmospheric pressure surrounding the chamber;
removing the tissue sample from the patient'"'"'s body through a suction resulting from the negative pressure environment, wherein the tissue sample is received into the cannula;
removing the cannula from the patient'"'"'s body;
generating a positive pressure environment in the chamber relative to an atmospheric pressure surrounding the chamber;
releasing the positive pressure environment through the first recessed area on the chamber; and
removing the tissue sample from the cannula.
0 Assignments
0 Petitions
Accused Products
Abstract
A method for using a biopsy device is disclosed. The biopsy device includes a chamber having a body having a distal end and a proximal end, wherein the proximal end includes an inlet. The biopsy device further includes a vacuum generator for generating negative and positive pressure and at least one first recessed area and at least one second recessed area. The first recessed area extends along an inner wall of the body, proximate the proximal end of the body of the chamber. The first recessed area is configured to release positive pressure within the chamber. The second recessed area extends along the inner wall of the body, proximate the distal end of the body of the chamber. The second recessed area is configured to release negative pressure within the chamber.
-
Citations
12 Claims
-
1. A method of extracting a tissue sample from a biopsy device comprising:
-
providing a cannula fluidly connected to a chamber, the chamber having a body having a distal end, a proximal end; at least one first recessed area extending along an inner wall of the body, proximate the proximal end of the body of the chamber, wherein the at least one first recessed area is configured to release positive pressure generated within the chamber; at least one second recessed area extending along the inner wall of the body, proximate the distal end of the body of the chamber, wherein the at least one second recessed area is configured to release negative pressure generated within the chamber; inserting the cannula into a patient'"'"'s body; generating a negative pressure environment in the chamber relative to an atmospheric pressure surrounding the chamber; removing the tissue sample from the patient'"'"'s body through a suction resulting from the negative pressure environment, wherein the tissue sample is received into the cannula; removing the cannula from the patient'"'"'s body; generating a positive pressure environment in the chamber relative to an atmospheric pressure surrounding the chamber; releasing the positive pressure environment through the first recessed area on the chamber; and removing the tissue sample from the cannula. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for using a device for harvesting a tissue sample from a patient, comprising:
-
providing a biopsy device having a chamber, a piston movably disposed in the chamber, and a cannula fluidly connected to the chamber, the chamber having a body having a distal end, a proximal end, at least one first recessed area extending along an inner wall of the body proximate the proximal end of the body of the chamber wherein the at least one first recessed area is configured to release positive pressure generated within the chamber, and at least one second recessed area extending along the inner wall of the body proximate the distal end of the body of the chamber wherein the at least one second recessed area is configured to release negative pressure generated within the chamber; generating the negative pressure in the chamber relative to an atmospheric pressure surrounding the chamber by displacing the piston in the chamber in a direction toward the distal end, and releasing the negative pressure when the piston and the at least one second recessed area interact to establish a fluid bypass around the piston; and generating the positive pressure in the chamber relative to an atmospheric pressure surrounding the chamber by displacing the piston in the chamber in a direction toward the proximal end, and releasing the positive pressure when the piston and the at least one first recessed area interact to establish a fluid bypass around the piston. - View Dependent Claims (12)
-
Specification