Vented directional delivery cannula with openings of different size for use with flowable materials and method for use thereof
First Claim
Patent Images
1. A cannula for use in delivering a flowable material into human tissue, said cannula comprising:
- a proximal end, a distal end, a length therebetween, a mid-longitudinal axis, and an interior passage extending along the mid-longitudinal axis between said proximal and distal ends, said cannula having a plurality of transverse openings between said proximal and distal ends, said transverse openings being in communication with said passage, at least two of said transverse openings being proximate said distal end and being of a different size, said cannula having an exterior surface being generally smooth along a majority of the length to facilitate linear insertion of said cannula into the tissue.
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Abstract
In one preferred aspect, a cannula is provided that has openings of different size to permit a surgeon to selectively control the distribution pattern of a flowable material through the cannula and into a patient. In another aspect, a method is provided for selectively controlling the distribution pattern of a flowable material through a cannula having openings of different size into a patient.
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Citations
30 Claims
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1. A cannula for use in delivering a flowable material into human tissue, said cannula comprising:
a proximal end, a distal end, a length therebetween, a mid-longitudinal axis, and an interior passage extending along the mid-longitudinal axis between said proximal and distal ends, said cannula having a plurality of transverse openings between said proximal and distal ends, said transverse openings being in communication with said passage, at least two of said transverse openings being proximate said distal end and being of a different size, said cannula having an exterior surface being generally smooth along a majority of the length to facilitate linear insertion of said cannula into the tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for delivering a flowable material into human tissue, said method comprising the steps of:
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providing a cannula comprising a proximal end, a distal end, a mid-longitudinal axis, and an interior passage extending along the mid-longitudinal axis between the proximal and distal ends, the cannula having a plurality of transverse openings between the proximal and distal ends, the transverse openings being in communication with the passage, the transverse openings including at least one small opening and at least one larger opening larger than the small opening, the cannula having an exterior surface being generally smooth along a majority of the mid-longitudinal axis;
inserting the cannula into the tissue with the transverse openings directed toward a location in the tissue where flowable material is desired to be delivered;
delivering the flowable material through the passage of the cannula and out of the at least one larger transverse openings into the tissue; and
then delivering the flowable material through the passage of the cannula and out of the at least one small transverse openings into the tissue. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30)
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Specification