（2000c/mm2 = normal）
1000-2000 = Grade1
500-1000 = Grade 2
-500(BK(-)) = Grade 3
BK(+) = Grade 4
以上。Bullous Keratopathy/Corneal(Endothelial) decompensation → Grade4へ。
2000未満はドナー不適。1500未満でCL中止。1000未満はCat ope時要注意。
出典はWeb。
ちなみに日本人提唱の分類なので、海外で通じるかどうか微妙。
ただendothelial cell damage grading でググると以下が出て来る。
Normal分類は >2000 : functioning as a normal corneaと書いて、Normal=Grade 0みたいなのを作らない方が良かったように思う。Fuchs/Viral infection(Cogan etc.)で2000内皮があっても異常。Normalではない。
[Grading for corneal endothelial damage].
[Article in Japanese]
Abstract
While corneal endothelial damage in its most advanced stage results in bullous keratopathy where corneal transplantation is needed, there is no severity grading for corneal endothelial damage. The Japanese Corneal Society formed a working group to establish a severity grading for corneal endothelial damage. The following are the proposed severity grading criteria. Normal: Corneal endothelial cell (CEC) density is 2000 cells/mm2 or more. Grade 1: CEC density between 1000 and 2000 cells/ mm2. The corneal endothelium is below the normal physiological condition. Grade 2: CEC density between 500 and 1000 cells/ mm2. The transparency of the corneal endothelium is endangered. Even slight damage can induce bullous keratopathy. Grade 3: CEC density below 500 cells/mm2 but no corneal edema is observed. Grade 4: Bullous keratopathy. The cornea is opaque with edema.
www.ncbi.nlm.nih.gov
http://www.nichigan.or.jp/member/guideline/corneal_endothelium.pdf
