Artículos de revistas
Placental ARFI elastography and biometry evaluation in bitches
Fecha
2020-03Registro en:
Animal Reproduction Science, v. 214, 2020.
0378-4320
2441929818207005
1879403604104027
5536381089933355
8221512918552115
2268497631441092
0718940990886845
8457284097249188
0365493227769586
1058268278316443
4890046762900137
0000-0002-7553-810X
0000-0001-9039-1751
0000-0002-9760-8631
0000-0003-3625-3555
0000-0002-3826-5317
0000-0001-6979-5380
0000-0002-5517-4644
0000-0001-7696-0962
0000-0003-4373-6539
Autor
Universidade Estadual Paulista (Unesp)
Institución
Resumen
Placental rigidity and biometry of twelve pregnant bitches were evaluated using B-mode and Acoustic Radiation Force Impulse (ARFI) ultrasonography, performed once daily, from day 15 of gestation until parturition. Specific software (Virtual Touch Tissue Quantification® VTTQ and Virtual Touch Tissue Imaging Quantification® VTTIQ) were used. Values for results for variables were correlated and regression models related to gestational day were used to make evaluations. Maternal-fetal placental thickness increased to day 63 (P<0.0001; R² = 0.91); maternal placental thickness increased until day 40 (P = 0.0340; R² = 0.54); and fetal placental thickness increased to day 50 (P<0.0001; R² = 0.83) of gestation. Shear wave velocity (SWV) of the dorsal (P<0.0010) was greater than lateral, which in turn was greater (P = 0.020) than the ventral area. The SWV of the dorsal area as determined using VTTQ, decreased from day 21–35 and increased to day 56 of gestation (P = 0.0291; R² = 0.4021); lateral SWVdecreased from day 24–45 and increased until the time of parturition (P<0.001; R² = 0.6055). The SWV of the dorsal area, as determined using VTTIQ, decreased from day 21–43 and then increased to day 60 of gestation (P = 0.0016; R² = 0.5075); and ventral area SWV increased from day 21–23 and decreased until the time of parturition (P<0.001; R² = 0.8055). Placental alterations reflect structural and biochemical gestational adaptations and can become useful techniques for obstetrics.