Double-acting vitreous probe with contoured port
First Claim
1. A vitrectomy probe, comprising:
- a hand-graspable body;
an outer tube extending from the hand-graspable body and sized to penetrate an eye of a patient during an ocular surgery, the outer tube having a closed distal end and a first port sized to receive vitreous of the eye; and
an inner tube disposed at least partially within the outer tube, the inner tube comprising a second port selectively alignable with a portion of the first port in a manner that allows fluid to flow through the first port and into the second port, the second port having a proximal edge and a distal edge, the inner tube also comprising a distal tip forming a first cutting edge facing in a distal direction, the distal edge of the second port forming a second cutting edge facing in a proximal direction, the inner tube having a first diameter at a proximal end of the second port and having a second diameter at the distal tip, the first diameter being greater than the second diameter;
wherein the first cutting edge is configured to cut tissue that enters the first port of the outer tube as the inner tube slides in a distal direction; and
wherein the second cutting edge is configured to cut tissue that enters the second port of the inner tube as the inner tube slides in the proximal direction;
wherein the second port further comprises;
a guiding surface at the proximal edge projecting in the distal direction to form a distally extending portion, the guiding surface being arranged to slidably bear on an internal surface of the outer tube while the inner tube moves relative to the outer tube, the first diameter comprising a diameter of the inner tube at the guiding surface.
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Accused Products
Abstract
A vitrectomy probe includes a hand-graspable body and an outer tube extending from the hand-graspable body. The outer tube includes a closed distal end and a first port sized to receive tissue. The vitrectomy probe also includes an inner tube within the outer tube with a second port that is selectively alignable with a portion of the first port to allow fluid flow and uniquely sized to increase fluid flow. The inner tube includes a distal tip with a cutting edge on each of the distal and proximal sides of the tip. The distal tip has a smaller diameter than that of the inner tube at a proximal side of the second port. The proximal side of the second port includes a guiding surface that slidably bears on an inner surface of the outer tube to prevent the distal tip from excessively protruding from the first port of the outer tube.
160 Citations
13 Claims
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1. A vitrectomy probe, comprising:
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a hand-graspable body; an outer tube extending from the hand-graspable body and sized to penetrate an eye of a patient during an ocular surgery, the outer tube having a closed distal end and a first port sized to receive vitreous of the eye; and an inner tube disposed at least partially within the outer tube, the inner tube comprising a second port selectively alignable with a portion of the first port in a manner that allows fluid to flow through the first port and into the second port, the second port having a proximal edge and a distal edge, the inner tube also comprising a distal tip forming a first cutting edge facing in a distal direction, the distal edge of the second port forming a second cutting edge facing in a proximal direction, the inner tube having a first diameter at a proximal end of the second port and having a second diameter at the distal tip, the first diameter being greater than the second diameter; wherein the first cutting edge is configured to cut tissue that enters the first port of the outer tube as the inner tube slides in a distal direction; and wherein the second cutting edge is configured to cut tissue that enters the second port of the inner tube as the inner tube slides in the proximal direction; wherein the second port further comprises; a guiding surface at the proximal edge projecting in the distal direction to form a distally extending portion, the guiding surface being arranged to slidably bear on an internal surface of the outer tube while the inner tube moves relative to the outer tube, the first diameter comprising a diameter of the inner tube at the guiding surface. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A vitrectomy probe, comprising:
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a hand-graspable body; an outer tube extending from the hand-graspable body and sized to penetrate an eye of a patient during an ocular surgery, the outer tube having a closed distal end and a first port sized to receive vitreous of the eye; and an inner tube within the outer tube and comprising a second port having a proximal end and a distal end along a side of a circumference of the inner tube near a distal end of inner tube, the second port comprising a guiding surface at the proximal end extending in a distal direction, a first side lobe, and a second side lobe, each of the first and second side lobes formed in part by the guiding surface and disposed at opposite sides of the guiding surface along the circumference of the inner tube to enhance fluid flow through the second port when the guiding surface is at least partially aligned with the first port, wherein the distally extending guiding surface is a guide for the inner tube disposed within the outer tube as the inner tube oscillates in the outer tube. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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Specification