Patent ID: 9693898
Date: 2017-07-04
CPC Classifications: A61B,A61F

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.