Lavage with tissue cutting cannula
First Claim
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1. An irrigation and suction lavage assembly for irrigation and removal of irrigation fluid and body tissue during surgery, the assembly being operable by one hand of a surgeon, the assembly comprising:
- a conduit piece;
an inner cannula defining an interior region and having a distal end, first means formed adjacent the distal end for cutting tissue, and a proximal end rigidly coupled to the conduit piece;
valve means coupled to the conduit piece for controlling the flow of irrigation fluid and body tissue through the conduit piece and the inner cannula; and
an outer cannula having a distal end and second means formed adjacent the distal end for cutting tissue, the inner cannula being coaxially positioned inside the outer cannula, the first and second cutting means being axially positioned to cut tissue in response to movement of the outer cannula.
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Accused Products
Abstract
The present invention relates to an irrigation and suction lavage assembly for irrigation, suction, and removal of body tissue. The assembly includes a rigid conduit piece, an inner cannula, a movable outer cannula with a cutter, and an independently movable actuated valve to control irrigation and suction.
438 Citations
48 Claims
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1. An irrigation and suction lavage assembly for irrigation and removal of irrigation fluid and body tissue during surgery, the assembly being operable by one hand of a surgeon, the assembly comprising:
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a conduit piece; an inner cannula defining an interior region and having a distal end, first means formed adjacent the distal end for cutting tissue, and a proximal end rigidly coupled to the conduit piece; valve means coupled to the conduit piece for controlling the flow of irrigation fluid and body tissue through the conduit piece and the inner cannula; and an outer cannula having a distal end and second means formed adjacent the distal end for cutting tissue, the inner cannula being coaxially positioned inside the outer cannula, the first and second cutting means being axially positioned to cut tissue in response to movement of the outer cannula. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An irrigation and suction lavage assembly for irrigation and removal of irrigation fluid and body tissue during surgery, the assembly being operable by one hand of a surgeon, the assembly comprising:
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a conduit piece; an inner cannula defining an interior region and having a distal end, first means formed adjacent the distal end for cutting tissue, the inner cannula being coupled to the conduit piece; valve means coupled to the conduit piece for controlling the flow of irrigation fluid and body tissue through the conduit piece and the inner cannula; and an outer cannula having a distal end and second means formed adjacent the distal end for cutting tissue, the inner cannula being coaxially positioned inside the outer cannula, the first and second cutting means being axially positioned to cut tissue in response to reciprocating movement of the outer cannula; and means coupled to the outer cannula for engaging a digit of the surgeon'"'"'s hand to allow the surgeon to move the outer cannula relative to the inner cannula. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. An irrigation and suction lavage assembly for irrigation and removal of irrigation fluid and body tissue during surgery, the assembly comprising:
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an outer cannula having a side wall defining a first cutting surface for cutting tissue, the outer cannula being movable between a rest position and a ready-for-cutting position; an inner cannula coaxially positioned inside the outer cannula and having a proximal end, the inner cannula defining an interior region and having a second cutting surface; first means coupled to a proximal end of the inner cannula for breachably sealing the proximal end to allow a surgical instrument to be sealingly inserted into the inner cannula; valve means coupled to the inner cannula for controlling the flow of irrigation fluid and body tissue through the inner cannula; and means coupled to the outer cannula for moving the outer cannula relative to the inner cannula in response to movement of a digit of the surgeon'"'"'s hand to cut tissue. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A surgical assembly for removal of body tissue, the assembly comprising:
- a rigid outer cannula defining a cannula interior, the cannula having a proximal end and a distal end, the distal end being insertible and positionable into a patient'"'"'s body, and the cannula defining a cutting surface opening adjacent the distal end to permit access to the cannula interior for capture of body tissue in the cannula interior, the rigidity of the cannula causing the distal end thereof to move in the same direction and distance as the proximal end;
a rigid inner cannula with a cutting surface and passageway therein, said inner cannula supporting the outer cannula and having its cutting surface cooperate with the cutting surface of the rigid outer cannula for cutting body tissue; means for moving the outer cannula relative to the inner cannula; a conduit piece rigidly attached to the inner cannula which supports the outer cannula for movement, the conduit piece having at least one channel defined therein in fluid communication with the cooperating cutting surface on the outer and inner cannula; moveable valve means rigidly coupled to the rigidly attached conduit piece and inner cannula for controlling flow through said one channel; the rigidly coupled conduit piece and valve means having a handgrip portion for holding and accurately positioning the distal end of the inner cannula at a desired location in the patient by movement of the handgrip portion to direct the distal end of the inner cannula to the desired location;
suction means connected to the at least one channel for removing body tissue cut by the cutting surface through the cannula and conduit piece;mean to move the valve means; wherein both the means for moving the cutter and the valve means can be actuated by a digit of the hand gripping the hand grip portion while the hand moves the rigidly attached conduit piece and inner cannula to position the distal end of the inner cannula at the desired location in the patient. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32)
- a rigid outer cannula defining a cannula interior, the cannula having a proximal end and a distal end, the distal end being insertible and positionable into a patient'"'"'s body, and the cannula defining a cutting surface opening adjacent the distal end to permit access to the cannula interior for capture of body tissue in the cannula interior, the rigidity of the cannula causing the distal end thereof to move in the same direction and distance as the proximal end;
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33. A lavage assembly for surgery, irrigation, suction, and removal of body tissue, the assembly comprising:
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a rigid cannula defining a cannula interior, the cannula having a proximal end and a distal end, the distal end being insertible and positionable in a patient'"'"'s body, and the cannula defining a cannula opening adjacent the distal end to permit access to the cannula interior for capture of body tissue in the cannula interior; a cutter moveable outside the cannula interior for cutting body tissue entering the cannula opening; means for moving the cutter; an independently actuated vane means rigidly connected to the cannula to control irrigation and suction flow to the cannula interior, regardless of movement or lack of movement of the cutter; means to actuate the valve means; wherein the cannula and valve means are integrated into a rigid structure to be held in one hand such that movement of the rigidly coupled valve means and cannula by a users hand allows the distal end of the cannula to be accurately positioned at a specific location in the patients body; and wherein the means for moving the cutter and the means to actuate the valve means are both operable by a hand of the user as it moves the rigidly coupled valve means and cannula to accurately position the distal end of the cannula in the patient. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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Specification