Doppler Ultrasound in Canine Pregnancy

Blanco, Paula Graciela; Arias, Daniel Osvaldo; Gobello, Cristina

doi:10.7863/jum.2008.27.12.1745

Cited by 46 publications

(35 citation statements)

References 32 publications

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“…Physiological gestation is accompanied by significant adaptations in maternal hemodynamics, both in women and in female dogs (DUVEKOT et al, 1993) and these ensure adequate uterine perfusion and consequently normal fetal development (VALENSISE et al, 2000;BLANCO et al, 2008). Results of the hemodynamic adaptations involving the cardiovascular system in mammals are very similar (DESAI et al, 2004;BLANCO et al, 2011).…”

Section: Gestational Hemodynamicsmentioning

confidence: 72%

“…Among these, the cardiovascular system responds with hemodynamic changes and, in particular, cardiac output increases as a result of reduced systemic vascular resistance (HAMEED & SKLANSKY, 2007). These changes play a major role in maintaining uterine perfusion, and they are crucial for fetal development (EGHBALI et al, 2005;BLANCO et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

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Hemodynamic gestational adaptation in bitches

et al. 2017

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Throughout pregnancy, maternal hemodynamic adaptation is needed to ensure proper uterine perfusion and fetal development. When the uteroplacental vascular system is formed, starting with reduced resistance to uterine arterial flow, this results in decreased total vascular resistance, an activation of neuroendocrine vasoactive peptides, an increase in circulating blood and changes in the cardiovascular system morphophysiology to respond to the increasing demands of uterine perfusion. There has been considerable study of hemodynamic adaptation in pregnant women and this assessment has become a diagnostic tool for fatal obstetric disorders. However, in bitches the available information in this regard is limited; therefore a parallel was drawn between other species of animals and women, in order to subsidize the paucity of information about this process and facilitate the understanding of maternal-fetal hemodynamic adaptation in pregnant bitches. This review and literature analysis aimed\ to discuss morphophysiological cardiovascular adaptations during pregnancy and the possible disorders that can affect this process in pregnant female dogs.

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Section: Gestational Hemodynamicsmentioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Hemodynamic gestational adaptation in bitches

et al. 2017

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“…Pulsed wave Doppler allows analysis of blood flow within a single vessel. The Doppler waveform represents changes in the velocity of the blood flow during the cardiac cycle (Blanco, Arias, & Gobello, ; Giannico, Gil, Garcia, & Froes, ; Poulsen Nautrup, ).…”

Section: Introductionmentioning

confidence: 99%

“…The use of colour and pulsed Doppler provides qualitative and quantitative vascular information about maternal and foetal haemodynamic characteristics in real time by means of some parameters such as systolic peak velocity (SPV), end diastolic velocity (EDV), pulsatility index (PI) resistance index (RI), blood direction and blood type (Blanco et al, ; Giannico et al, ; Nicolaides et al, ; Poulsen Nautrup, ).…”

Section: Introductionmentioning

confidence: 99%

Doppler evaluation of umbilical artery during normal gestation in sheep

Troisi

Cardinali

Orlandi³

et al. 2018

Reprod Domestic Animals

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Throughout gestation, changes in foetal umbilical cord Doppler parameters in ewes were detected. Doppler ultrasonography of the umbilical artery was performed weekly starting at 18 weeks before parturition until birth. In the foetal umbilical artery (UA), systolic peak velocity (SPV), end diastolic velocity (EDV), increased (p for within-subjects effect <0.001) while pulsatility index (PI) resistance index (RI) decreased (p for within-subjects effect <0.001) with the progress of pregnancy. A linear trend was found on all patterns (p < 0.001). In particular, the EDV values increased significantly (p < 0.05) with respect to previous weeks, at weeks 16, 11, 10, 7, and 1 before parturition. The SPV values increased significantly (p < 0.05), with respect to previous observations, at weeks 11, 10, and 7 before parturition. Finally, the PI and RI decreased significantly (p < 0.05) only at week 7 before parturition. The increased velocities and reduced resistance index suggest a progressive increment in blood flow to the foetus towards the end of pregnancy. Foetal and utero-placental vascular parameters can be reliably evaluated using high-frequency ultrasound.

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“…However, there are no studies on models of vascular function. Doppler sonography, a rapid noninvasive technique that provides valuable information about the maternal‐fetal hemodynamic situation, has been routinely used to monitor high‐risk pregnancies in many species, including humans . Consistent evaluations of fetal and maternal vascular Doppler velocities in mice is possible using high‐frequency sonography .…”

mentioning

confidence: 99%