Medical tack with a variable effective length
First Claim
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1. A medical tack comprising:
- a shaft having a point end and a base end;
an attachment point formed near said point end;
an attachment point formed near said base end; and
means for varying a position of one of said attachment points.
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Abstract
The present invention is an improved medical tack. The tack of the present invention includes attachment points at each end where at least one of the attachment points is moveable, varying the effective length of the tack. Varying the length of the medical tack adapts the tack for use with tissue of different thickness.
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Citations
22 Claims
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1. A medical tack comprising:
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a shaft having a point end and a base end;
an attachment point formed near said point end;
an attachment point formed near said base end; and
means for varying a position of one of said attachment points. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A retinal tack for attaching a retinal device comprising:
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a shaft having a point end and a base end;
an attachment point formed near said point end;
an attachment point formed near said base end; and
means for varying a position of one of said attachment points. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A retinal tack for attaching a retinal device comprising:
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a shaft having a point end and a base end;
a barb formed near said point end;
a flange formed near said base end;
a coil spring, having one end affixed to said flange and circling around said shaft; and
a washer affixed to an end or said spring, opposite to said one end, wherein said shaft is sized such that said tack will pierce said retinal device, a retina and a sclera such that said barb abuts a back side of the sclera and tends to prevent the tack from being withdrawn, and said washer abuts said retinal device exerting less that 0.2 g/mm2 across the surface of a retinal device.
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Specification