DN -->
dibucaine number
medical dictionary

A test for differentiation of one of several forms of atypical pseudocholinesterases that are unable to inactivate succinylcholine at normal rates; based upon percent inhibition of the enzymes by dibucaine, normal enzyme has a DN of 75 and above, heterozygous atypical enzyme has a DN of 40-70, and homozygous atypical enzyme has a DN of less than 20.

See: fluoride number.

Acronym: DN

(05 Mar 2000)