title: [The determination of the sum potential amplitude for the prognostication of facial paresis of viral etiology].
abstract: In 29 patients with facial pareses of viral etiology the sum potential amplitude of the M. orbicularis oris was determined in a comparison of the two sides for prognostication purposes. If the sum potential amplitude is reduced by less than 70 per cent a return of good functions can be expected within 6-8 weeks. If the reduction of the sum potential amplitude lies between 70 and 95 per cent, a reliable prognosis is not possible, whereas with values below 95 per cent the paresis does not improve at all or hardly improves within 6-8 weeks. An evaluation of the returned function, about 1 year after the beginning of the paresis, i.e. at a time when the regeneration is basically completed, shows that all cases with an originally poor function (judged 6-8 weeks after onset of paresis) had changed into cases with a moderate function, and all cases with an originally moderate function had turned into cases with a good function. In another study concerning patients with idiopathic facial paresis the same method yielded results comparable to those of the above-mentioned study, so that the conclusion can be drawn that in the prognostication of the peripheral facial paresis by means of determining the sum potential amplitude-regardless of whether the facial paresis is of viral or idiopathic etiology-the same yardsticks have to be applied.
mesh_terms: D000200:Action Potentials; D000293:Adolescent; D000328:Adult; D000368:Aged; D000914:Antibodies, Viral / Q000032:analysis; D002648:Child; D005158:Facial Paralysis / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D014777:Virus Diseases; D014780:Viruses / Q000276:immunology
chemical_list: D000914:Antibodies, Viral
vernacular_title: Die Bestimmung der Summenpotentialamplitude zur Prognoseerstellung bei viral bedingter Fazialisparese