NESTED CANNULA TIPS
First Claim
Patent Images
1. A nested cannula, comprising:
- two or more nested tubes, each tube having a distal end portion; and
a composite tip shape extending distally from an end of the nested cannula, the composite tip shape includes the distal end portions of the two or more nested tubes such that when combined the distal end portions collectively contribute to the composite tip shape which improves one of distal advancement or proximal retraction during deployment;
wherein the composite tip shape includes at least one additional portion (220) to form a continuous rounded end portion.
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Accused Products
Abstract
A nested cannula includes two or more nested tubes (204, 206). A tip portion (202) at a distal end of the nested cannula includes a shape compositely formed from ends of the tubes of the nested cannula to improve one of distal advancement or proximal retraction during deployment.
50 Citations
26 Claims
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1. A nested cannula, comprising:
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two or more nested tubes, each tube having a distal end portion; and a composite tip shape extending distally from an end of the nested cannula, the composite tip shape includes the distal end portions of the two or more nested tubes such that when combined the distal end portions collectively contribute to the composite tip shape which improves one of distal advancement or proximal retraction during deployment; wherein the composite tip shape includes at least one additional portion (220) to form a continuous rounded end portion. - View Dependent Claims (2)
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3-12. -12. (canceled)
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13. A nested cannula, comprising:
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two or more nested tubes, each tube having a distal end portion; and a composite tip shape extending distally from an end of the nested cannula, the composite tip shape includes the distal end portions of the two or more nested tubes such that when combined the distal end portions collectively contribute to the composite tip shape which improves at least one of distal advancement or proximal refraction during deployment; wherein one or more nested tubes includes a retraction stop on a distal end of the tube which prevents further retraction of a tube into an enclosing tube. - View Dependent Claims (14, 15, 17, 18, 19, 20, 21, 22, 23, 24)
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16. (canceled)
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25. A method for employing a nested cannula, comprising:
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providing a nested cannula having two or more nested tubes, each tube having a distal end portion and a composite tip shape extending distally from an end of the nested cannula, the composite tip shape including the distal end portions of the two or more nested tubes such that, when combined, the distal end portions collectively contribute to the composite tip shape; wherein the composite tip shape includes at least one additional portion to form a continuous rounded end portion; and deploying the nested cannula with the composite tip shape to improve at least one of distal advancement or proximal refraction of the nested cannula.
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26. A method for employing a nested cannula, comprising:
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providing a nested cannula having two or more nested tubes, each tube having a distal end portion and a composite tip shape extending distally from an end of the nested cannula, the composite tip shape including the distal end portions of the two or more nested tubes such that, when combined, the distal end portions collectively contribute to the composite tip shape; wherein one or more nested tubes includes a refraction stop on a distal end of the tube which prevents further retraction of a tube into its enclosing tube; and deploying the nested cannula with the composite tip shape to improve at least one of distal advancement or proximal refraction of the nested cannula.
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Specification