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A simple apparatus for controlled rate corneal freezing II
Acta Ophthalmologica
|February 1, 1981
Summary
This study introduces a novel, non-electrical corneal freezer utilizing liquid nitrogen for rapid cooling. The device allows for safe and quick thawing of corneas, preserving tissue viability.
Area of Science:
- Ophthalmology
- Biomedical Engineering
- Cryobiology
Background:
- Preservation of corneal tissue is critical for transplantation success.
- Current methods for corneal cryopreservation often require complex equipment or pose risks of thermal damage.
Purpose of the Study:
- To describe a novel, simple, and effective corneal freezer.
- To demonstrate a method for rapid corneal freezing and thawing without electrical or mechanical components.
Main Methods:
- A passive cooling unit utilizing liquid nitrogen for partial immersion was designed.
- Corneal tissue was cryopreserved in aluminum vials within the freezing unit.
- Thawing was achieved by transferring vials to a room-temperature metal core.
Main Results:
- The described corneal freezer operates without electricity or mechanical parts.
- Controlled cooling rates are managed by the unit's heat capacity and heat removal.
- Rapid thawing in under 30 seconds was achieved, minimizing overheating risks.
Conclusions:
- This passive corneal freezer offers a safe, efficient, and accessible method for cryopreservation.
- The technique facilitates rapid thawing, potentially improving outcomes in corneal transplantation.