Oval cannula assembly and method of use
First Claim
1. A percutaneous surgical disc procedure, comprising the steps of:
- a) percutaneously entering the back of a patient in a posterolateral position with an obturator having a lumen;
b) advancing the obturator through a percutaneously created fenestration of the annulus of the disc;
c) placing a guide containing a generally oval shaped bore over the obturator;
d) inserting an elongated member through the bore of the guide and into the back of the patient into the percutaneously created fenestration of the annulus of the disc, the elongated member having a cross-sectional shape such that when placed adjacent to the obturator, forms an assembly having an oval cross-section;
e) removing the guide from the obturator and elongated member assembly;
f) sliding an oval cannula having a bore with an oval transverse cross-section and proximal and distal ends, downwardly over the obturator and elongated member assembly;
g) inserting the distal end of the oval cannula into the disc;
h) removing the obturator and elongated member assembly from the bore of the oval cannula and the disc; and
i) introducing multiple surgical instruments into the oval cannula to perform the surgical procedure.
2 Assignments
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Accused Products
Abstract
The present invention os a method and apparatus for performing percutaneous surgical disc procedures. The method includes percutaneously entering the back of a patient in a posterolateral position with an obturator and advancing the obturator through a percutaneously created fenestration of the annulus of the disc. A guide containing an oval shaped bore is placed over the obturator. An elongated member, having a cross-sectional shape such that when placed adjacent to the obturator forms an assembly having an oval cross-section, is inserted through the bore of guide and into the back of the patient and the fenestration of the annulus of the disc, The guide is removed and an oval cannula having a bore with an oval transverse cross-section and a proximal and distal end, is slid downwardly over the obturator and elongated member assembly. The distal end of the oval cannula is inserted into the disc. The obturator and the elongated member assembly are removed from the bore of the oval cannula and multiple surgical instruments are introduced into the oval cannula to perform the surgical procedure.
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Citations
29 Claims
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1. A percutaneous surgical disc procedure, comprising the steps of:
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a) percutaneously entering the back of a patient in a posterolateral position with an obturator having a lumen; b) advancing the obturator through a percutaneously created fenestration of the annulus of the disc; c) placing a guide containing a generally oval shaped bore over the obturator; d) inserting an elongated member through the bore of the guide and into the back of the patient into the percutaneously created fenestration of the annulus of the disc, the elongated member having a cross-sectional shape such that when placed adjacent to the obturator, forms an assembly having an oval cross-section; e) removing the guide from the obturator and elongated member assembly; f) sliding an oval cannula having a bore with an oval transverse cross-section and proximal and distal ends, downwardly over the obturator and elongated member assembly; g) inserting the distal end of the oval cannula into the disc; h) removing the obturator and elongated member assembly from the bore of the oval cannula and the disc; and i) introducing multiple surgical instruments into the oval cannula to perform the surgical procedure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus for use in a percutaneous surgical disc procedure wherein the disc has an annulus, comprising:
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a) an oval cannula having an elongated tube with an inner bore, an outer surface, and a transverse cross section that is defined by an X axis and a Y axis, wherein the X axis dimension is greater that the Y axis dimension so that the bore has a generally ovoid shape, the elongated tube having proximal and distal ends; b) the inner bore being sized and shaped to allow an obturator and an elongated member to fit inside the inner bore when the obturator and elongated member are adjacent to one another and form an assembly with an oval cross-section; c) the oval shaped bore of the oval cannula enabling a user to insert more than one instrument at a time into the bore when the obturator and elongated member have been removed from the oval shaped bore, further comprising a collar portion with a longitudinal axis, a transverse axis, and upper and lower surfaces, longitudinal opposing side walls positioned between the upper and lower surfaces along the longitudinal axis, and transverse opposing side walls positioned between the upper and lower surfaces along the transverse axis, the collar portion having first and second end with the elongated tube extending through the collar portion from the lower surface to the upper surface proximal to the first end of the collar portion, further comprising an elevated cylinder extending from the upper surface of the collar portion in alignment with the elongated tube forming a first opening and a continuous channel from the opening of the elevated cylinder through the distal end of the elongated tube.
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13. An apparatus for use in a percutaneous surgical disc procedure wherein the disc has an annulus, comprising:
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an oval cannula having an elongated tube with an inner bore, an outer surface, and a transverse cross section that is defined by an X axis and a Y axis, wherein the X axis dimension is greater that the Y axis dimension so that the bore has a generally ovoid shape, the elongated tube having proximal and distal ends; b) the inner bore being sized and shaped to allow an obturator and an elongated member to fit inside the inner bore when the obturator and elongated member are adjacent to one another and form an assembly with an oval cross-section; c) the oval shaped bore of the oval cannula enabling a user to insert more than one instrument at a time into the bore when the obturator and elongated member have been removed from the oval shaped bore, further comprising a collar portion with a longitudinal axis, a transverse axis, and upper and lower surfaces, longitudinal opposing side walls positioned between the upper and lower surfaces along the longitudinal axis, and transverse opposing side walls positioned between the upper and lower surfaces along the transverse axis, the collar portion having first and second end with the elongated tube extending through the collar portion from the lower surface to the upper surface proximal to the first end of the collar portion, further comprising a valve extending outwardly from the transverse opposing side wall at the first end of the collar portion, the valve forming a second opening communicating with the continuous channel of the elongated tube.
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14. An apparatus for use in a percutaneous surgical disc procedure wherein the disc has an annulus, comprising:
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a) an oval cannula having an elongated tube with an inner bore, an outer surface, and a transverse cross section that is defined by an X axis and a Y axis, wherein the X axis dimension is greater that the Y axis dimension so that the bore has a generally ovoid shape, the elongated tube having proximal and distal ends; b) a collar portion with a longitudinal axis, a transverse axis, and upper and lower surfaces, longitudinal opposing side walls positioned between the upper and lower surfaces along the longitudinal axis, and transverse opposing side walls positioned between the upper and lower surfaces along the transverse axis, the collar portion having first and second ends; d) the elongated tube extending through the collar portion from the lower surface to the upper surface proximal to the first end of the collar portion; e) an elevated cylinder extending from the upper surface of the collar portion in alignment with the elongated tube forming a first opening and a continuous channel from the opening of the elevated cylinder through the distal end of the elongated tube; and f) a valve extending outwardly from the transverse opposing side wall at the first end of the collar portion, the valve forming a second opening communicating with the continuous channel of the elongated tube. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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22. An apparatus for percutaneously performing surgical procedures on the spinal region of a patient, comprising:
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a) a obturator for advancing through a percutaneously created fenestration of the annulus of the disc of a patient; b) an elongated member; c) the combination of the elongated member and the obturator having a generally oval shape upon assembly when the obturator is placed adjacent to elongated member; d) a guide for guiding the obturator and elongated member together in an adjacent position; e) an oval cannula having a generally oval shaped bore that can removably receive the obturator and elongated member assembly, the oval shaped bore enabling a user to insert more than one instrument at a time into the bore when the obturator and the elongated member have been removed from the oval shaped bore. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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29. An apparatus for percutaneously performing surgical procedures on the spinal region of a patient, comprising:
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a) means, including an obturator having a lumen and an outer surface, for forming a fenestration formed in a patient'"'"'s back and spinal disc and advancing said apparatus into said fenestration; b) an elongated member having a longitudinal groove that is sized and shaped to receive a portion of the outer surface of the obturator, the groove being so shaped in transverse cross-section that a longitudinally extending portion of the obturator can occupy and nest in the groove; c) the combination of the elongated member and the obturator having a generally oval shape upon assembly when the obturator closely fits into the groove; and d) an oval cannula that has a generally oval shaped bore that can removably receive the combination of the elongated member and the obturator, the oval shaped bore enabling a user to insert surgical instruments into the bore during disc surgery.
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Specification