Percutaneous tissue removal device
First Claim
Patent Images
1. A tissue removal assembly, comprising:
- a.) a tubular tissue removal member having a wall, a distal diameter, a proximal end, a distal end, and a longitudinal axis extending between said proximal end and said distal end;
an open, distally located tissue entry opening;
a relatively more proximal, tissue exit port; and
a tissue removal passageway extending between said tissue entry opening and said tissue exit port;
b.) a cutting member having a generally rounded "J" shape, a generally square "J" shape, or an "L" shape, said cutting member being rotatable with respect to said tubular tissue removal member in a diameter greater than the tubular tissue removal member distal diameter, extendible beyond said distally located tissue entry opening, and having a cutting surface, where upon rotation of said cutting member and extension of said cutting member distally beyond said tissue entry opening within a tissue region, said cutting surface cuts a discrete tissue mass having an overall diameter measured generally orthogonal to the tubular tissue removal member axis which is greater than said tubular tissue removal member distal diameter and which discrete tissue mass is in a configuration removable through said tissue entry opening.
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Abstract
This is a device for percutaneous tissue sampling or excision. In particular, it uses a rotating cutter which produces a helically cut, discrete tissue mass that is removable through a comparatively much smaller access member. The tissue mass is easily reconstructed to its original form and orientation once taken from the body for further study.
192 Citations
46 Claims
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1. A tissue removal assembly, comprising:
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a.) a tubular tissue removal member having a wall, a distal diameter, a proximal end, a distal end, and a longitudinal axis extending between said proximal end and said distal end;
an open, distally located tissue entry opening;
a relatively more proximal, tissue exit port; and
a tissue removal passageway extending between said tissue entry opening and said tissue exit port;b.) a cutting member having a generally rounded "J" shape, a generally square "J" shape, or an "L" shape, said cutting member being rotatable with respect to said tubular tissue removal member in a diameter greater than the tubular tissue removal member distal diameter, extendible beyond said distally located tissue entry opening, and having a cutting surface, where upon rotation of said cutting member and extension of said cutting member distally beyond said tissue entry opening within a tissue region, said cutting surface cuts a discrete tissue mass having an overall diameter measured generally orthogonal to the tubular tissue removal member axis which is greater than said tubular tissue removal member distal diameter and which discrete tissue mass is in a configuration removable through said tissue entry opening. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A procedure for removing tissue from a selected internal tissue region, comprising the steps of:
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introducing a tissue removal assembly to a region adjacent a selected internal tissue region, said tissue removal assembly comprising; a.) a tubular tissue removal member having a wall, a distal diameter, a proximal end, a distal end and a longitudinal axis extending between said proximal end and said distal end;
an open, distally located tissue entry opening;
a relatively more proximal, tissue exit port; and
a tissue removal passageway extending between said tissue entry opening and said tissue exit port,b.) a cutting member having a generally rounded "J" shape, a generally square "J" shape, or an "L" shape, said cutting member being rotatable with respect to said tubular tissue removal member in a diameter greater than the tubular tissue removal member distal diameter, extendible beyond said distally located tissue entry opening, and having a cutting surface, where upon rotation of said cutting member and extension of said cutting member distally beyond said tissue entry opening within said tissue region, said cutting surface cuts a discrete tissue mass having an over all diameter measured generally orthogonal to the tubular tissue removal member axis which is greater than said tubular tissue removal member distal diameter and which discrete tissue mass is in a configuration removable through said tissue entry opening, rotating said cutting member and said cutting surface to form a discrete tissue mass having an overall diameter measured generally orthogonal to the tubular tissue removal member axis which is greater than said tubular tissue removal member distal diameter and which discrete tissue mass is in a configuration removable through said tissue entry opening, and removing said discrete tissue mass through said tissue entry opening, through said tissue removal passageway, and out through said tissue exit port. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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Specification