[A new assessment model for the evaluation of late results following a decompressive operation of the median nerve].
Of ninety patients who had undergone carpal tunnel release in the years from 1970 to 1980, 67% could be reinvestigated after a follow-up period of five years and six months (average interval). A new scheme for classification of long-term results was used. This was achieved by the use of objective clinical and electro-physiological observations. Postoperatively 71% could be classified as "cured" or "much improved". Only 15% were graded as "improved" and 14% remained "unchanged" or "worse".