Biopsy device
First Claim
1. A biopsy device comprising:
- a pressure chamber having a body having a distal end, a proximal end, and an inner wall, wherein the proximal end includes an inlet;
at least one first recessed area extending along the inner wall of the body, proximate the proximal end of the body of the pressure chamber, wherein the first recessed area is configured to release pressure within the pressure chamber;
at least one second recessed area extending along the inner wall of the body, proximate the distal end of the body of the pressure chamber, wherein the second recessed area is configured to release pressure within the pressure chamber;
a piston configured to engage the inner wall of the pressure chamber;
a cannula coupled to the pressure chamber for taking a tissue sample from a patient, the cannula defining a tissue chamber; and
a fluid receptacle interposed between the tissue chamber and the pressure chamber, the fluid receptacle having an absorbent material to absorb a fluid,wherein the at least one first recessed area proximate the proximal end of the pressure chamber is configured to release a positive pressure within the pressure chamber.
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Accused Products
Abstract
A biopsy device includes a pressure chamber having a body having a distal end and a proximal end, wherein the proximal end includes an inlet. At least one first recessed area extends along an inner wall of the body, proximate the proximal end of the body of the pressure chamber. The first recessed area is configured to release pressure within the pressure chamber. At least one second recessed area extends along the inner wall of the body, proximate the distal end of the body of the pressure chamber. The second recessed area is configured to release pressure within the pressure chamber. A cannula is coupled to the pressure chamber for taking a tissue sample from a patient. The cannula defines a tissue chamber. A fluid receptacle is interposed between the tissue chamber and the pressure chamber. The fluid receptacle has an absorbent material to absorb a fluid.
565 Citations
12 Claims
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1. A biopsy device comprising:
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a pressure chamber having a body having a distal end, a proximal end, and an inner wall, wherein the proximal end includes an inlet; at least one first recessed area extending along the inner wall of the body, proximate the proximal end of the body of the pressure chamber, wherein the first recessed area is configured to release pressure within the pressure chamber; at least one second recessed area extending along the inner wall of the body, proximate the distal end of the body of the pressure chamber, wherein the second recessed area is configured to release pressure within the pressure chamber; a piston configured to engage the inner wall of the pressure chamber; a cannula coupled to the pressure chamber for taking a tissue sample from a patient, the cannula defining a tissue chamber; and a fluid receptacle interposed between the tissue chamber and the pressure chamber, the fluid receptacle having an absorbent material to absorb a fluid, wherein the at least one first recessed area proximate the proximal end of the pressure chamber is configured to release a positive pressure within the pressure chamber.
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2. A biopsy device comprising:
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a pressure chamber having a body having a distal end, a proximal end, and an inner wall, wherein the proximal end includes an inlet; at least one first recessed area extending along the inner wall of the body, proximate the proximal end of the body of the pressure chamber, wherein the first recessed area is configured to release pressure within the pressure chamber; at least one second recessed area extending along the inner wall of the body, proximate the distal end of the body of the pressure chamber, wherein the second recessed area is configured to release pressure within the pressure chamber; a piston configured to engage the inner wall of the pressure chamber; a cannula coupled to the pressure chamber for taking a tissue sample from a patient, the cannula defining a tissue chamber; and a fluid receptacle interposed between the tissue chamber and the pressure chamber, the fluid receptacle having an absorbent material to absorb a fluid, wherein as the piston is advanced toward the proximal end of the pressure chamber but distal to the at least one first recessed area, a positive pressure is created relative to an atmospheric pressure, and as the piston engages the at least one first recessed area, the positive pressure is released through the at least one first recessed area.
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3. A biopsy device for tissue sample removal from a patient, comprising:
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a pressure chamber including a body having a distal end, a proximal end, and an inner wall, wherein the proximal end includes an inlet; a first recessed area extending along the inner wall of the body, wherein the first recessed area is configured to release positive pressure at a first location within the pressure chamber; a second recessed area extending along the inner wall of the body, wherein the second recessed area is configured to release negative pressure at a second location within the pressure chamber, the second location being spaced apart from the first location; a piston configured to engage the inner wall of the pressure chamber, and configured for movement over the first recessed area to release the positive pressure and configured for movement over the second recessed area to release the negative pressure; a cannula coupled to the inlet of the pressure chamber, the cannula having a tissue chamber configured to receive a tissue sample during tissue sample removal; and a fluid receptacle located between the tissue chamber and the pressure chamber, the fluid receptacle having an absorbent material to absorb a body fluid received in the tissue chamber during tissue sample removal. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification