Comparison of right and left common carotid arteries of horses and mules by two-dimensional ultrasound and Doppler flow

Author:

Fogaça Jéssica L.1ORCID,Castiglioni Maria Cristina R.2,Vettorato Michel C.2,Silva Jeana P.2,Bueno Laís M.C.2,Filadelpho André Luis2,Puoli-Filho José Nicolau P.2,Machado Vânia Maria V.1ORCID

Affiliation:

1. Universidade Estadual Paulista “Júlio de Mesquita Filho”, Brazil

2. Universidade Estadual Paulista, Brazil

Abstract

ABSTRACT: In ultrasonography, the bi-dimensional mode (B-mode) allows the morphological and morphometric evaluation of several types of organs and tissues, while the Doppler mode allows the hemodynamic evaluation. In humans, the Doppler evaluation is routinely used in the assessment of important arteries and veins, such as the carotid arteries and jugular veins, with significant differences between genres and sides. However, in veterinary medicine, this diagnostic method is not yet well established in the evaluation of the carotid arteries, with only few reports in domestic horses. This study aims to compare the right and left common carotid arteries of domestic horses and mules using bi-dimensional and Doppler ultrasound evaluation. The common carotid arteries from 10 domestic horses (five males and five females) and 10 mules (five males and five females) were evaluated. The following variables were measured at three different portions (cranial, middle and caudal): diameter, intima-media thickness (IMT), resistivity index (RI), pulsatility index (PI), peak of systolic velocity (pSV) and final diastolic velocity (fDV). No significant differences were observed in the bi-dimensional variables (diameter and IMT) between the common carotid arteries of horses and mules, regardless of gender (p>0.05). In Doppler mode, there were no significant differences between carotid values in male and female horses (p> 0.05). In the mules, it was only possible to observe differences between the RI and PI values (p<0.05), being higher on the left side (0.81 and 2.04 respectively), and the fDV (p<0.05) higher, on the right side (14.35) in males. As for females, there was only in fDV (p<0.05), with the upper right side (23.16). Diameters and IMT do not differ between sides in horses and mules in B-mode ultrasound. Spectral Doppler in horses does not differ between sides, regardless of gender. As for mules, males differ in RI, PI and fDV between sides, while females differ only in fDV.

Publisher

FapUNIFESP (SciELO)

Subject

General Veterinary

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