Devices and methods for percutaneous surgery
First Claim
1. A device for use in percutaneous spinal surgery, comprising:
- an elongated cannula having a first inner dimension and an outer dimension sized for percutaneous introduction into a patient, said cannula further including a distal working end and an opposite proximal end, said cannula defining a working channel between said ends sized for receiving a tool therethrough;
a viewing element having a first end connectable to a viewing apparatus and a lens disposed at an opposite second end; and
a housing mounted on said proximal end of said cannula, said housing defining a working channel therethrough in communication with said working channel and including a C-shaped clip for removably engaging said viewing element to support said viewing element with said lens disposed adjacent said distal working end of said cannula.
2 Assignments
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Accused Products
Abstract
Devices and methods for performing percutaneous spinal surgery under direct visualization and through a single cannula are shown. A device (10) is provided which includes an elongated cannula (20) having a first inner diameter (DI) and an outer diameter (DO) sized for percutaneous introduction into a patient. The cannula (20) defines a working channel (25) between its ends (21, 22) which has a second diameter (D2) equal to the diameter (DI) of the cannula sized for receiving a tool therethrough. An elongated viewing element (50) is engageable to the cannula (20) adjacent the working channel (25), preferably by a fixture (30). The fixture (30) includes a housing (31) attachable to the proximal end (22) of the cannula (20) that defines a working channel opening (35) which is in communication with the working channel (25). The housing (31) also defines an optics bore (60) adjacent the working channel opening (35). In certain embodiments, the fixture (30) supports the viewing element (50) for translation and/or rotation within the optics bore (60) along the longitudinal axis of the bore, and for rotation of the housing (31) relative to the cannula (20) so that the longitudinal axis of the optics bore (60) will rotate about the longitudinal axis of the working channel (25). Methods are also provided for performing spinal surgeries percutaneously with direct visualization and without the requirement for a fluid-maintained workspace.
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Citations
37 Claims
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1. A device for use in percutaneous spinal surgery, comprising:
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an elongated cannula having a first inner dimension and an outer dimension sized for percutaneous introduction into a patient, said cannula further including a distal working end and an opposite proximal end, said cannula defining a working channel between said ends sized for receiving a tool therethrough; a viewing element having a first end connectable to a viewing apparatus and a lens disposed at an opposite second end; and a housing mounted on said proximal end of said cannula, said housing defining a working channel therethrough in communication with said working channel and including a C-shaped clip for removably engaging said viewing element to support said viewing element with said lens disposed adjacent said distal working end of said cannula. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A device for use in percutaneous spinal surgery, comprising:
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an elongated cannula sized for percutaneous introduction into a patient having a distal working end and an opposite proximal end and defining a working channel between said ends, said working channel having an inner dimension sized to receive a tool therethrough; a viewing device having a first end connectable to a viewing apparatus and a second end including a lens positionable adjacent said working end of said cannula; and a fixture removably supported adjacent said proximal end of said cannula and defining an optics bore having a longitudinal axis, said optics bore sized to removably receive said viewing device therethrough, and said fixture supporting said viewing device for movement within said optics bore along the longitudinal axis of said bore to extend or retract said lens relative to said distal working end of said cannula; and a number of resilient rings disposed between said fixture and said cannula. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A device for use in percutaneous spinal surgery comprising:
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an elongated cannula having a distal working end and an opposite proximal end and defining a working channel between said ends, said working channel having a first longitudinal axis and an inner dimension sized to receive a tool therethrough; and a fixture mounted to said proximal end of said cannula, said fixture including a housing defining a working channel opening in communication with said working channel of said cannula and an optics bore for receiving an viewing device therethrough in communication with said working channel, said optics bore having a second longitudinal axis substantially parallel to said first longitudinal axis, said housing being rotatable relative to said cannula so that said second longitudinal axis of said optics bore rotates about said first longitudinal axis of said working channel. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A device for supporting a viewing device within a cannula defining a working channel and having an outer diameter, comprising:
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a fixture removably mountable to an end of the cannula, said fixture including a housing defining a working channel opening arranged to communicate with the working channel when said fixture is mounted to the cannula, said working channel opening sized to receive a plurality of tools therethrough, and said housing further defining an optics bore for receiving a viewing device therethrough and arranged so that the viewing device received within said optics bore will extend into the working channel of the cannula when said fixture is mounted to the cannula, said housing further defining a receiving bore having an inner diameter slightly larger than the outer diameter of the cannula so that said housing can rotate about the cannula; and a number of O-rings sized to be disposed between said receiving bore of said housing and said outer diameter of the cannula when said fixture is mounted to the cannula. - View Dependent Claims (26, 27, 28, 29, 30)
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31. A device for use in percutaneous spinal surgery comprising:
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an elongated cannula having a longitudinal axis defining a length between its ends and an outer dimension sized for percutaneous introduction into a patient, said cannula defining a working channel between the ends of said cannula; a viewing element sized for introduction into said cannula; and a support connected to said viewing element and mounted at one end of said cannula to permit positioning of said viewing element relative to said cannula at selected arcuate locations about said longitudinal axis of said cannula. - View Dependent Claims (32, 33, 34)
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35. A device for use in percutaneous surgery, comprising;
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an elongated cannula having an inner dimension and an outer dimension sized for percutaneous introduction into a patient, said cannula further including a distal working end and an opposite proximal end, and defining a working channel between said ends sized for receiving at least one tool therethrough; a viewing element having a first end connectable to a viewing apparatus and a lens disposed at an opposite second end; and means for movably supporting said viewing element within said working channel to permit movement of said lens at said working end without movement of the at least one tool when the at least one tool extends through said working channel. - View Dependent Claims (36, 37)
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Specification