Hemodynamic evaluation of the supratesticular artery in bulls

Autor: Ivis da Silva Dias, Gabriel Pereira, Elis Maria Victalina Franco, Celso Koetz Junior, Flávio Antônio Barca Junior, Patrícia da Cruz Fávaro, Paulo Roberto Adona, Marcelo Marcondes Seneda
Rok vydání: 2020
Předmět:
Zdroj: Livestock Science. 241:104210
ISSN: 1871-1413
DOI: 10.1016/j.livsci.2020.104210
Popis: The evaluation of testicular hemodynamics can contribute significantly to understanding the thermoregulatory mechanisms and the supply of oxygen in the testis in domestic animals. The aim of this study was to evaluate the testicular hemodynamics used in Color Doppler ultrasonography in bulls of the Aberdeen Angus and Polled Hereford breeds at four different moments (C1, C2, C3 and C4) during the seasonal variations in bovine breeding animals. Twenty-eight bulls (Polled Hereford n = 12 and Aberdeen Angus n = 16) were evaluated by means of velocimetry (MV), pulsatility index (PI) and resistance index (RI) using Color Doppler ultrasonography. The climate temperature and humidity index (THI) data were collected from an automatic meteorological station of the National Institute of Meteorology. Data were analyzed using ANOVA and Tukey's test and Pearson's correlation with significance level of 5% were used. Preliminary analyses showed no differences within breeds, or interaction breed and collection. However, significate difference was observed when the time of collection (C1, C2, C3 and C4) was evaluated. The MV of blood flow (cm/s) was different in C3 (7.53 ± 2.66) compared to C4, C1 and C2 (13.63 ± 4.24, 13.57 ± 4.32 and 10.97 ± 3.37, respectively; P
Databáze: OpenAIRE
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