February 1990
Volume 31, Issue 2
Free
Articles  |   February 1990
Oxygen permeability of collagen shields.
B A Weissman; N A Brennan; D A Lee; I Fatt
Author Affiliations
  • B A Weissman
    Jules Stein Eye Institute, Department of Ophthalmology, University of California, Los Angeles School of Medicine 90024-1771.
  • N A Brennan
    Jules Stein Eye Institute, Department of Ophthalmology, University of California, Los Angeles School of Medicine 90024-1771.
  • D A Lee
    Jules Stein Eye Institute, Department of Ophthalmology, University of California, Los Angeles School of Medicine 90024-1771.
  • I Fatt
    Jules Stein Eye Institute, Department of Ophthalmology, University of California, Los Angeles School of Medicine 90024-1771.
Investigative Ophthalmology & Visual Science February 1990, Vol.31, 334-338. doi:
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      B A Weissman, N A Brennan, D A Lee, I Fatt; Oxygen permeability of collagen shields.. Invest. Ophthalmol. Vis. Sci. 1990;31(2):334-338.

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Abstract

The oxygen permeability (Dk) of ten 24-hr collagen shields was measured directly by polarographic methodology at approximately 2 hr of hydration. Edge and boundary effects were included in the calculations. Dk was found to be approximately 26 x 10(-11) cm ml O2/sec ml mmHg at 35 degrees C. Mean water content of the shields was 65.7% (SD = 1.0%) as measured by a hand refractometer. Therefore, the projected oxygen transmissibility of collagen shields is expected to be compatible with normal corneal metabolism.

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