Vented directional delivery cannula with openings of different shape for use with flowable materials and method for use thereof
First Claim
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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 located proximate said distal end, said at least two transverse openings including at least one opening having a first shape and at least one opening having a second shape different than said first shape.
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Abstract
In one preferred aspect, a cannula is provided that has openings of different shape 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 shape into a patient.
37 Citations
29 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 located proximate said distal end, said at least two transverse openings including at least one opening having a first shape and at least one opening having a second shape different than said first shape. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. 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 opening having a first shape and at least one opening having a second shape different than the first shape, 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 transverse openings of the first shape into the tissue; and
then delivering the flowable material through the passage of the cannula and out of the at least one transverse openings of the second shape into the tissue. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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Specification