title: [Grip strength changes in familial amyloidotic polyneuropathy].
abstract: BACKGROUND
  Familial amiloidotic polyneuropathy (FAP) is an autossomical and dominant neurodegenerative disease related with systemic deposition of amyloid fibre mainly on peripheral nervous system. Clinically, is translated by an autonomous sensitive-motor polyneuropathy with beginning nearly always in foot, involving subsequently the hands. Until now, the unique available treatment for FAP disease is liver transplantation requiring medication that negatively affect muscle metabolism and force production mechanism. To our knowledge there are no quantitative characterizations of peak force in FAP patients or any comparison with healthy people. This knowledge will be extremely important to verify clinical and functional evolution of this disease and eventually prescribe an effective rehabilitation program.
  
  
  OBJECTIVE
  The purpose of this study was to analyse and compare levels of hand grip strength (peak force and endurance) in FAP patients with (FAPTx) or without (FAPNTx) a liver transplant with a group of healthy people (GC).
  
  
  METHODS
  The total sample of individuals where two hundred and six, assigned in 3 groups: 59 patients PAFNTx (23 males, 36 female; age 35 ± 8 years); 90 patients PAFTx (53 males, 37 females; age 34 ± 8 years) e 62 healthy persons (GC) (30 males, 32 females; age 33 ± 9 years). Grip strength was assessed by a portable grip dynamometer E-link (Biometrics Ltd, UK). All measurements were taken on standardized positions with standardized orders. The value noted to peak force was classified according to American College of Sports Medicine norms for grip strength.
  
  
  RESULTS
  The 3 groups are differents (p < 0,05) for weigth, body mass index (BMI) and grip strength in both hands and endurance for left hand. Negative correlations between age and grip strength were found for PAFNTx and PAFTx but not for GC.
  
  
  CONCLUSIONS
  According to our results FAP patients have lower values for grip strength in both hands than healthy subjects and consequently a worse classification in ACSM norms. Most patients present grip strength values lower than medium values or even precarious. These results could present predictable negative functional implications, showing also the necessity of a rehabilitation program with specificity at hand motor level.
authors.affiliation: Áreas de Fisioterapia, de Matemática, Escola Superior de Tecnologia da Saúde de Lisboa, Lisboa.
authors.forename: Maria Teresa
authors.initials: MT
authors.lastname: Tomás
authors.forename: Helena
authors.initials: H
authors.lastname: Santa-Clara
authors.forename: Estela
authors.initials: E
authors.lastname: Monteiro
authors.forename: Elizabete
authors.initials: E
authors.lastname: Carolino
authors.forename: António
authors.initials: A
authors.lastname: Freire
authors.forename: Eduardo
authors.initials: E
authors.lastname: Barroso
mesh_terms: D000328:Adult; D028227:Amyloid Neuropathies, Familial / Q000503:physiopathology* / Q000601:surgery; D005260:Female; D018737:Hand Strength; D006801:Humans; D016031:Liver Transplantation; D008297:Male; D008875:Middle Aged; D055815:Young Adult