title: Measurement of testicular volume in Wistar rats using a caliper and ultrasonography in experimental surgery.
abstract: OBJECTIVE
  To compare the measurement of the testicular volume of Wistar rats using a caliper and ultrasonography.
  
  
  METHODS
  Forty Wistar rats were randomly assigned into four groups. A tensile force of 1.6 Newton (N) and 1.0 N was applied to the right spermatic cord in group I and group II, respectively. Group III was the sham group, and group IV served as a control. The initial and final testicular volumes were measured using a caliper and ultrasonography and compared. A significance level of 5% was used.
  
  
  RESULTS
  The Kappa coefficient was equal to 0.292 (p = 0.006). The Pearson correlation coefficient obtained for the percent reduction in the right testicular volume using ultrasonography and a caliper was equal to 0.696 (p < 0.001).
  
  
  CONCLUSIONS
  There was reasonable agreement and a significant positive correlation between the percent reduction in the right testicular volume using ultrasonography and a caliper.
authors.affiliation: Fellow PhD degree, Postgraduate Program in Sciences Applied to Surgery and Ophthalmology, School of Medicine, Universidade Federal de Minas Gerais (UFMG), Brazil. Concept, design, and intellectual content of the study; manuscript preparation; technical procedures.
authors.forename: Salomão
authors.initials: S
authors.lastname: Brêtas
authors.affiliation: PhD, Full Professor, Department of Surgery, School of Medicine, UFMG, Belo Horizonte-MG, Brazil. Concept, design, and intellectual content of the study; manuscript preparation; critical revision.
authors.forename: Edson Samesima
authors.initials: ES
authors.lastname: Tatsuo
authors.affiliation: MD, Fellow, Audit and Regulation Mechanisms in Health, Fundação Unimed, Universidade Gama Filho (UGF), Rio de Janeiro-RJ, Brazil. Acquisition and interpretation of data.
authors.forename: Monica Odete Oliveira
authors.initials: MO
authors.lastname: Brêtas
authors.affiliation: Graduate student, Medical Sciences, Escola Superior de Ciências da Santa Casa de Misericórdia de Vitória (EMESCAM), Vitória-ES, Brazil. Acquisition and interpretation of data, technical procedures.
authors.forename: Caroline Oliveira
authors.initials: CO
authors.lastname: Brêtas
mesh_terms: D000818:Animals; D008297:Male; D023421:Models, Animal; D009929:Organ Size; D011897:Random Allocation; D017208:Rats, Wistar; D013085:Spermatic Cord; D013737:Testis / Q000033:anatomy & histology* / Q000000981:diagnostic imaging / Q000601:surgery; D014143:Traction / Q000379:methods; D014463:Ultrasonography / Q000379:methods*