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Condition: Used - Excellent
MPN: Hanna Corneal Trephine System w Hanna Punch Keratoplasty
Depth: 8 inches
Height: 8 inches
Width: 8 inches
MORIA Hanna Corneal Trephine System w Hanna Punch Keratoplasty
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This Hanna Corneal Trephine Stystem is in excellent condition and used to minimize astigmatism after penetrating keratoplasty.
All pieces can be autoclaved, gassed, or soaked to sterilize.
After penetrating keratoplasty, minimizing postoperative astigmatism is important for visual rehabilitation. Surgeons agree that a uniform, symmetrical trephination in both donor and host corneas minimizes postoperative astigmatism after sutures are removed.
The Hanna trephine attaches firmly to the eye through suction applied to the limbal conjunctiva. Uniform support over the whole cornea during trephination prevents corneal vaulting. From a fully retracted position, the blade rotates descending to a preset depth. After which, the blade rotates without further descent, cutting the displaced tissue and creating a uniform incision.
Controlled trephination depth
Ability to select the depth of the incision and avoidance of damage to inner structures of the eye during trephination.
Visualization of the blade as it cut the tissue.
The depth of the cut can be set in 50 micron increments from 0 to 1.2 mm.
Accurate centering of the trephine with a fenestrated inner obturator.
This will support the cornea during trephination.
8 suction holes
The suction at the limbus secures the Trephine to the eye during trephination.
The cylindrical guide insures that the blade is always centered over the donor corneo-scleral shell.
Teflon well to support the host
The donor punch block has a Teflon well with suction holes that has the same curvature as the support surface of the host trephine.