Small Gauge Mechanical Tissue Cutter/Aspirator Probe For Glaucoma Surgery
First Claim
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1. A mechanical tissue cutter/aspirator probe comprising:
- a generally cylindrical outer cannula;
an inner cannula that reciprocates in the outer cannula;
a port located near a distal end of the outer cannula on a side or end of the outer cannula;
a guide located on the distal end of the outer cannula, the guide having a distal surface;
wherein a distance between the distal surface of the guide and the port is approximately equal to the distance between a back wall of Schlemm'"'"'s canal and a trabecular meshwork in a human eye.
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Abstract
A small gauge mechanical tissue cutter/aspirator probe useful for removing the trabecular meshwork of a human eye has a generally cylindrical outer cannula, an inner cannula that reciprocates in the outer cannula, a port located near or at the distal end of the outer cannula on a side or tip of the outer cannula, and a guide with a distal surface located on the distal end of the outer cannula. A distance between the distal surface of the guide and the port is approximately equal to the distance between the back wall of Schlemm'"'"'s canal and the trabecular meshwork.
170 Citations
16 Claims
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1. A mechanical tissue cutter/aspirator probe comprising:
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a generally cylindrical outer cannula; an inner cannula that reciprocates in the outer cannula; a port located near a distal end of the outer cannula on a side or end of the outer cannula; a guide located on the distal end of the outer cannula, the guide having a distal surface; wherein a distance between the distal surface of the guide and the port is approximately equal to the distance between a back wall of Schlemm'"'"'s canal and a trabecular meshwork in a human eye. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A mechanical tissue cutter/aspirator probe comprising:
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a generally cylindrical outer cannula with a generally smooth distal end; an inner cannula that reciprocates in the outer cannula; a port located near a distal end of the outer cannula on a side or end of the outer cannula; wherein a distance between the distal end of the outer cannula and the port is approximately equal to the distance between a back wall of Schlemm'"'"'s canal and a trabecular meshwork in a human eye. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method of cutting and removing trabecular meshwork from a human eye, the method comprising:
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providing a mechanical tissue cutter/aspirator probe with a generally cylindrical outer cannula, an inner cannula that reciprocates within the outer cannula, and a port located near a distal end of the outer cannula on a side or tip of the outer cannula, such that the location of the port on the outer cannula facilitates the placement of the port at the trabecular meshwork of a human eye; actuating the inner cannula so that the trabecular meshwork is cut without damaging the outer wall of Schlemm'"'"'s canal; and aspirating the cut trabecular meshwork from the eye. - View Dependent Claims (15, 16)
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Specification