Biopsy apparatus
First Claim
1. A tissue cutting device comprising:
- an outer cannula defining an outer lumen and a tissue-receiving opening adjacent a distal end of said outer cannula communicating with said outer lumen;
an inner cannula slidably disposed within said outer lumen defining an inner lumen from an open distal end to an open opposite proximal end, said inner cannula defining a cutting edge at said open distal end operable to sever tissue projecting through said tissue-receiving opening, wherein the inner cannula is configured such that said severed tissue entering the tissue-receiving opening can be aspirated through the inner lumen, and completely through a handpiece;
a rotary motor operably coupled to said inner cannula and configured to rotate said inner cannula within said outer lumen;
a tubular axle for supporting said rotary motor for movement with said inner cannula; and
a linear motor operably coupled to said tubular axle and configured to axially reciprocate said rotary motor, and thereby said inner cannula, while said rotary motor rotates said inner cannula;
wherein the tubular axle is configured such that said severed tissue entering the tissue-receiving opening can be aspirated linearly from a distal most end of the tubular axle, completely through and exit out of a proximal most end of the tissue cutting device and the tubular axle.
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Accused Products
Abstract
A disposable tissue removal device comprising a cutting element mounted to a handpiece. The cutting element includes an outer cannula defining a tissue-receiving opening and an inner cannula concentrically disposed within the outer cannula. The outer cannula has a trocar tip at its distal end and a cutting board snugly disposed within the outer cannula. The inner cannula defines an inner lumen that extends the length of the inner cannula and terminates in an inwardly beveled, razor-sharp cutting edge. The inner cannula is driven by both a rotary motor and a reciprocating motor. At the end of its stroke, the inner cannula makes contact with the cutting board to completely sever the tissue. An aspiration vacuum is applied to the inner lumen to aspirate excised tissue through the inner cannula and into a collection trap that is removably mounted to the handpiece. The rotary and reciprocating motors are hydraulically powered through a hydraulic circuit. The hydraulic circuit includes a foot pedal that initiates aspiration vacuum, rotary motion and reciprocation of the inner cannula. The hydraulic circuit is configured so that the inner cannula closes the tissue-receiving opening before the foot pedal is depressed and automatically after the foot pedal is released.
234 Citations
24 Claims
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1. A tissue cutting device comprising:
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an outer cannula defining an outer lumen and a tissue-receiving opening adjacent a distal end of said outer cannula communicating with said outer lumen; an inner cannula slidably disposed within said outer lumen defining an inner lumen from an open distal end to an open opposite proximal end, said inner cannula defining a cutting edge at said open distal end operable to sever tissue projecting through said tissue-receiving opening, wherein the inner cannula is configured such that said severed tissue entering the tissue-receiving opening can be aspirated through the inner lumen, and completely through a handpiece; a rotary motor operably coupled to said inner cannula and configured to rotate said inner cannula within said outer lumen; a tubular axle for supporting said rotary motor for movement with said inner cannula; and a linear motor operably coupled to said tubular axle and configured to axially reciprocate said rotary motor, and thereby said inner cannula, while said rotary motor rotates said inner cannula; wherein the tubular axle is configured such that said severed tissue entering the tissue-receiving opening can be aspirated linearly from a distal most end of the tubular axle, completely through and exit out of a proximal most end of the tissue cutting device and the tubular axle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A tissue cutting device comprising:
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an outer cannula defining an outer lumen between a distal end and an opposite proximal end, and further defining a tissue-receiving opening adjacent said distal end communicating with said lumen; a cutting member slidably disposed within said outer lumen, said cutting member defining an unobstructed inner lumen therethrough between a distal end and an opposite proximal end, and further defining a cutting edge at said distal end of said cutting member; a handpiece supporting a drive mechanism operably coupled to said cutting member to rotate and extend said cutting edge across said tissue-receiving opening to sever tissue projecting therethrough, wherein the drive mechanism includes a second drive member for extending both the cutting member and a first drive member simultaneously; a vacuum source in fluid communication with said proximal end of said cutting member, wherein said vacuum source is configured to aspirate said severed tissue through said unobstructed inner lumen, through said drive mechanism and exit from the proximal most end of said inner lumen of said tissue cutting device; and a rotatively engaging hub having a distal end attached to said proximal end of said outer cannula, and a proximal end detachably mounted to said handpiece to permit separation of said outer cannula from said handpiece and said cutting member, wherein the rotatively engaging hub is configured to rotate engage the handpiece. - View Dependent Claims (13)
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14. A tissue cutting device comprising:
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an outer cannula defining an outer lumen and a tissue-receiving opening adjacent a distal end of said outer cannula communicating with said outer lumen; an inner cannula slidably disposed within said outer lumen and defining a unobstructed inner lumen from an open distal end to an open opposite proximal end, said inner cannula defining a cutting edge at said open distal end operable to sever tissue projecting through said tissue-receiving opening, wherein the inner cannula is configured such that said severed tissue can be aspirated from a distal most end of and through said unobstructed inner lumen and through a drive mechanism within a handpiece and exit out of a proximal most end of the handpiece; and wherein said drive mechanism has first and second drive members, wherein said drive mechanism is operably coupled to said inner cannula to rotate said inner cannula and move said first drive member and said inner cannula relative to said tissue-receiving opening in said outer cannula, wherein said drive mechanism is MRI compatible. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification