Tissue removal devices, systems and methods
First Claim
Patent Images
1. A tissue removal device, comprising:
- a housing;
a rigid aspiration cannula extending from the housing to a distal tip outside the housing, the distal tip having a distal opening;
a valve disposed in the housing, the valve comprising a valve port communicating with the aspiration cannula in a fluid-sealed manner; and
an aspiration line communicating with the valve and passing through the housing of the tissue removal device to provide a fluid connection between the aspiration cannula and a collection receptacle comprising an interior, an aspiration inlet communicating with the aspiration line and the interior, and a vacuum outlet communicating with the interior and configured for communication with a vacuum source, wherein the vacuum source creates a vacuum in a fluid circuit comprising the collection receptacle, the aspiration line, and the aspiration cannula, the valve being controlled to open and close to provide a pulsed vacuum;
a pneumatically-driven actuator configured for moving the valve between an open position and a closed position, wherein;
at the open position, the valve port is open wherein the valve defines an aspiration path through the aspiration cannula and the valve; and
at the closed position, the valve port is closed wherein the valve prevents vacuum from being applied at the distal tip,wherein the valve comprises an inner cannula and an outer cannula coaxially disposed about at least a portion of the inner cannula, the inner cannula is configured for communicating with the vacuum source via the aspiration line and is linearly movable by the actuator between the open position and the closed position, the valve port is formed in the outer cannula, at the open position the aspiration path passes through the outer cannula via the valve port and into the inner cannula, and at the closed position the inner cannula blocks the valve port.
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Abstract
A tissue removal device includes a rigid aspiration cannula, a valve communicating with the aspiration cannula in a fluid-sealed manner, and a pneumatically-driven actuator configured for moving the valve between an open position and a closed position, wherein at the open position the valve defines an aspiration path through the aspiration cannula and the valve, and at the closed position the valve prevents vacuum from being applied at the distal tip.
94 Citations
17 Claims
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1. A tissue removal device, comprising:
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a housing; a rigid aspiration cannula extending from the housing to a distal tip outside the housing, the distal tip having a distal opening; a valve disposed in the housing, the valve comprising a valve port communicating with the aspiration cannula in a fluid-sealed manner; and an aspiration line communicating with the valve and passing through the housing of the tissue removal device to provide a fluid connection between the aspiration cannula and a collection receptacle comprising an interior, an aspiration inlet communicating with the aspiration line and the interior, and a vacuum outlet communicating with the interior and configured for communication with a vacuum source, wherein the vacuum source creates a vacuum in a fluid circuit comprising the collection receptacle, the aspiration line, and the aspiration cannula, the valve being controlled to open and close to provide a pulsed vacuum; a pneumatically-driven actuator configured for moving the valve between an open position and a closed position, wherein; at the open position, the valve port is open wherein the valve defines an aspiration path through the aspiration cannula and the valve; and at the closed position, the valve port is closed wherein the valve prevents vacuum from being applied at the distal tip, wherein the valve comprises an inner cannula and an outer cannula coaxially disposed about at least a portion of the inner cannula, the inner cannula is configured for communicating with the vacuum source via the aspiration line and is linearly movable by the actuator between the open position and the closed position, the valve port is formed in the outer cannula, at the open position the aspiration path passes through the outer cannula via the valve port and into the inner cannula, and at the closed position the inner cannula blocks the valve port. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A tissue removal device, comprising:
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a housing; a rigid aspiration cannula extending from the housing to a distal tip outside the housing, the distal tip having a distal opening; a first valve disposed in the housing, the first valve comprising a valve port communicating with the aspiration cannula in a fluid-sealed manner; an aspiration line communicating with the first valve and passing through the housing of the tissue removal device to provide a fluid connection between the aspiration cannula and a collection receptacle comprising an interior, an aspiration inlet communicating with the aspiration line and the interior, and a vacuum outlet communicating with the interior and configured for communication with a vacuum source, wherein the vacuum source creates a vacuum in a fluid circuit comprising the collection receptacle, the aspiration line, and the aspiration cannula, the first valve being controlled to open and close to provide a pulsed vacuum; a second valve configured to open and close the aspiration line, the second valve positioned along the aspiration line between the housing and the aspiration inlet of the collection receptacle, where the second valve is controlled to either augment vacuum manipulation with the first valve or to provide a purging function to clear the aspiration line of obstructing tissue material; and a third valve configured to open and close the aspiration line, the second valve positioned along the aspiration line between the housing and the aspiration inlet of the collection receptacle where the second valve is controlled to augment vacuum manipulation with the first valve and the third valve is controlled to provide a purging function to clear the aspiration line of obstructing tissue material.
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Specification