TY - JOUR
T1 - Measurement of the viscoelastic properties of the vocal folds
AU - Wiikmann, Christian
AU - Da Silva, Marcelo Alves
AU - Arêas, Elizabeth Pinheiro Gomes
AU - Tsuji, Domingos Hiroshi
AU - Sennes, Luiz Ubirajara
PY - 2009/6/1
Y1 - 2009/6/1
N2 - Objectives: Studies of the viscoelastic properties of the vocal folds are normally performed with rheometers that use parallel plates whose interplate space is usually arbitrarily assigned a fixed value. In tissues subject to variation of thickness between samples, fixed gaps could result in different compressions, compromising the comparison among them. We performed an experimental study to determine whether different compressions can lead to different results in measurements of dynamic viscosity (DV) of vocal fold samples. Methods: We measured the DV of vocal fold samples of 10 larynges of cadavers under 3 different compression levels, corresponding to 0.2, 0.5, and 10 N on an 8-mm-diameter parallel-plate rheometer. Results: The DV directly varied with compression. We observed statistically significant differences between the results of 0.2 and 10 N (p = 0.0396) and 0.5 and 10 N (p = 0.0442). Conclusions: The study demonstrated that the level of compression influences the DV measure and suggests that a defined compression level should be used in rheometric studies of biological tissues.
AB - Objectives: Studies of the viscoelastic properties of the vocal folds are normally performed with rheometers that use parallel plates whose interplate space is usually arbitrarily assigned a fixed value. In tissues subject to variation of thickness between samples, fixed gaps could result in different compressions, compromising the comparison among them. We performed an experimental study to determine whether different compressions can lead to different results in measurements of dynamic viscosity (DV) of vocal fold samples. Methods: We measured the DV of vocal fold samples of 10 larynges of cadavers under 3 different compression levels, corresponding to 0.2, 0.5, and 10 N on an 8-mm-diameter parallel-plate rheometer. Results: The DV directly varied with compression. We observed statistically significant differences between the results of 0.2 and 10 N (p = 0.0396) and 0.5 and 10 N (p = 0.0442). Conclusions: The study demonstrated that the level of compression influences the DV measure and suggests that a defined compression level should be used in rheometric studies of biological tissues.
KW - Larynx
KW - Rheology
KW - Rheometer
KW - Viscosity
KW - Vocal fold
UR - http://www.scopus.com/inward/record.url?scp=67749124278&partnerID=8YFLogxK
U2 - 10.1177/000348940911800609
DO - 10.1177/000348940911800609
M3 - Article
C2 - 19663378
AN - SCOPUS:67749124278
VL - 118
SP - 461
EP - 464
JO - Annals of Otology, Rhinology and Laryngology
JF - Annals of Otology, Rhinology and Laryngology
SN - 0003-4894
IS - 6
ER -