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 and defining a 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;
a first hydraulic rotary motor operably coupled to said inner cannula to rotate said inner cannula within said outer cannula;
a second hydraulic reciprocating motor operably coupled to said inner cannula to translate said inner cannula within said outer cannula while said inner cannula rotates; and
a hydraulic system connecting said first and second hydraulic motors to a source of pressurized fluid.
1 Assignment
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Accused Products
Abstract
A disposable tissue removal device comprises a “tube within a tube” cutting element mounted to a handpiece. The inner cannula of the cutting element defines an inner lumen and terminates in an inwardly beveled, razor-sharp cutting edge. The inner cannula is driven by both a pneumatic rotary motor and a pneumatic 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 removably mounted to the handpiece. The rotary and reciprocating motors are hydraulically or pneumatically powered through a foot pedal operated pneumatically circuit. In one embodiment, the cutting element includes a cannula hub that can be connected to a fluid source, such as a valve-controlled saline bag.
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Citations
50 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 and defining a 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;
a first hydraulic rotary motor operably coupled to said inner cannula to rotate said inner cannula within said outer cannula;
a second hydraulic reciprocating motor operably coupled to said inner cannula to translate said inner cannula within said outer cannula while said inner cannula rotates; and
a hydraulic system connecting said first and second hydraulic motors to a source of pressurized fluid. - 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, 32, 33, 34, 35, 36, 37)
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38. A tissue cutting device comprising:
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an elongated handpiece defining an elongated channel on an outer surface of said handpiece;
a cannula hub mounted to said handpiece and having a fluid port;
a tube connected at one end to said fluid port and having an opposite end connectable to a fluid source, said tube disposed within said elongated channel and sized to be recessed within said channel relative to said outer surface an outer cannula supported at a proximal end by said cannula hub and defining a tissue-receiving opening adjacent a distal end thereof, and a lumen between said proximal and distal ends in fluid communication with said fluid port of said cannula hub; and
an inner cutting member slidably disposed within said lumen of said outer cannula and defining a cutting edge at said distal end operable to sever tissue projecting through said tissue-receiving opening. - View Dependent Claims (39, 40)
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41. A method for performing a tissue biopsy at a sample site within a patient comprising the steps of:
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introducing an outer cannula into the patient with a tissue receiving opening adjacent the sample site;
providing a medical treatment through the outer cannula at the sample site;
connecting the outer cannula to a tissue biopsy handpiece having a pneumatic motor-driven tissue cutting cannula with the tissue cutting cannula extending into the outer cannula;
operating the tissue biopsy handpiece to excise tissue through the tissue receiving opening; and
storing the excised tissue for subsequent examination.
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42. A tissue cutting device for removing tissue from a patient comprising:
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an outer cannula configured for introduction into the patient and defining a tissue-receiving opening adjacent a distal end thereof;
an inner cannula slidably disposed within said outer cannula and defining a lumen from an open distal end to an open opposite end, said inner cannula further defining a cutting edge at said open distal end operable to sever tissue projecting through said tissue-receiving opening;
a pneumatic motor assembly operably coupled to said inner cannula to rotate and reciprocate said inner cannula within said outer cannula;
a vacuum source fluidly coupled to said inner cannula for generating a vacuum in said lumen of said inner cannula to draw severed tissue therethrough; and
a tissue collection chamber interposed between said vacuum source and said open opposite end of said inner cannula to receive severed tissue drawn into said chamber by the vacuum. - View Dependent Claims (43, 44, 45, 46)
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47. A tissue cutting device comprising:
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an outer cannula defining a tissue-receiving opening adjacent a distal end thereof;
an inner cannula slidably disposed within said outer cannula and defining a 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;
a pneumatic rotary motor operably coupled to said inner cannula to rotate said inner cannula within said outer cannula;
a pneumatic reciprocating motor operably coupled to said pneumatic rotary motor to translate said rotary motor and thereby translate said inner cannula within said outer cannula while said inner cannula rotates; and
a handpiece supporting said pneumatic rotary motor and said pneumatic reciprocating motor, said handpiece including a pair of opposite rails, wherein said pneumatic rotary motor includes a pair of opposite outwardly projecting wings configured to be slidably supported on said opposite rails to resist rotation of said pneumatic rotary motor while permitting said pneumatic rotary motor to translate relative to said rails. - View Dependent Claims (48, 49, 50)
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Specification