Vascularização uterina de éguas prenhes de jumento e de garanhão monitoradas por ultrassonografia Doppler

Lemos, S. G.; Campos, Diego Guedes; Ferreira, Camila Silva Costa; Balaro, M. F. A.; Cunha, Luís Eduardo Ribeiro da; Pinna, Andrea; Brandão, F. Z.

doi:10.1590/s0100-736x2017000800017

Cited by 5 publications

(3 citation statements)

References 16 publications

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“…Disagreeing with Lemos et al (2018), age was not a factor that influenced none of the indices that evaluated in the study. As demonstrated by Ferreira et al (2019), the newly formed CL in old mares undergoes compensatory structural remodelling to ensure local blood supply and continuous P4, which maintain during early pregnancy without being influenced by the age effect.…”

Section: Discussionmentioning

confidence: 80%

Spectral Doppler ultrasound in selecting an equine embryo receiver

Ferreira

Morais

Andrade

et al. 2020

Reprod Domestic Animals

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The aim of this study was to evaluate whether the RI and PI values would help in choosing the best embryo recipient, and observe whether CL vascularization would influence P4 production. During the breeding season 2018/2019, the study was conducted using 35 mares, which is used for reference to collect data for the project on the day of embryo transfer. The utilized mares were divided into five groups followed by the day after ovulation, with D0 being the day of ovulation. Therefore, the five groups are as follows: D4—mares that were on the 4th post‐ovulation day; D5—mares that were on the 5th post‐ovulation day; and doing so successively for D6, D7 and D8. On the day of embryo transfer, the CL of the mares that selected as recipients was evaluated by B‐mode and power flow mode ultrasonography and the right and left dorsal branches of the uterine arteries by spectral Doppler ultrasonography. Blood samples were taken on the day of the embryo transfer for a dosage of P4 concentration by radioimmunoassay. No statistical difference was found between the variables when the mares were separated into pregnant and non‐pregnant mares, or when they were separated by age groups. When the groups of mares were compared by the day of embryo transfer, the statistical difference was found between the groups D5 × D6 (p = .0053) and D6 × D8 (p = .0036) in RI variable. In PI variable, the statistical difference was found between the groups D4 × D8 (p = .049), D5 × D6 (p = .0446) and D6 × D8 (p = .0024). We conclude that the mares with RI measurement of uterine arteries near 1.0 are correlated to mares with high CL vascularization and elevated P4 concentration.

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Section: Discussionmentioning

confidence: 80%

Spectral Doppler ultrasound in selecting an equine embryo receiver

Ferreira

Morais

Andrade

et al. 2020

Reprod Domestic Animals

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“…In relation to the gestation of hybrids, pregnant donkey showed greater uterine vascularization in the uterine horn contralateral to that of embryonic fixation. And that older mares showed less blood flow in the uterine artery, as they had higher PI and RI [54]. Another difference observed was comparing the PI of the fetal umbilical cord artery, which showed a statistical difference in pregnant with donkey semen when compared to pregnant with stallion semen [55].…”

Section: Doppler Ultrasonography In Pregnancy Diagnosismentioning

confidence: 99%

Doppler Ultrasound in the Reproduction of Mares

Ferreira¹,

Morais²

2022

Veterinary Medicine and Science

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Doppler ultrasonographic (US) is a method that provides real-time information on vascular architecture and hemodynamic aspects of blood vessels. It can determine the presence, direction, and speed of blood flow, being subdivided into the categories of color Doppler (color flow and power flow) and pulsed Doppler. The objective of this chapter was to compile data from several studies addressing the use of US Doppler correlated with pathophysiological phenomena of equine reproduction. Initially we decided to describe the technique, advantages, and disadvantages of each Doppler mode. Then the applicability of US Doppler in mares related to equine reproduction. Thus, within this chapter, you will find the form of use and descriptions of studies carried out on vascular perfusion of the follicular dynamics, the corpus luteum, the uterine segments, which we have divided into post-insemination evaluation, endometritis diagnosis and pregnancy diagnosis. So, we hope that this chapter will expand the knowledge about US Doppler and increase the number of veterinarians who will introduce the technique into their practical routine.

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“…The uterine arteries primarily feed the maternal part of the placenta (Kim-Egloff et al, 2016). Uterine vascularisation is evaluated using the resistance index (RI) and pulsatile index (PI) of the uterine arteries, which are good markers of the vascular perfusion of the reproductive organs (Bollwein et al, 1998;Lemos et al, 2017). As an increase in RI is a sign of a decrease in vascular perfusion, there is a negative correlation with vascular perfusion (Dickey, 1997;Sharma et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Doppler Ultrasonography Assessment of Uterine Artery Blood Flow Throughout Late Pregnancy in Awassi Ewes

Akkuş,

Emre,

Yaprakcı

2023

Animal Health Production and Hygiene

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Monitoring uterine blood flow during pregnancy provides information about fetal development. The aim of this study was to determine changes in uterine artery blood flow in the second half of pregnancy in Awassi sheep. The study included a total of 20 sheep with a single pregnancy, separated into 4 groups according to the period of the pregnancy, as 90-105-120-135 days. By monitoring the uterine artery blood flow with Doppler ultrasound, measurements were taken of the pulsatilite index (PI), resistance index (RI), end diastolic velocity (EDV), peak systolic velocity (PSV), systolic/diastolic ratio (S/D), and time-averaged peak (TAP). The data obtained were analyzed with repeated measures ANOVA (variance analysis). Throughout the pregnancy periods, a time-related significant difference was seen between the groups in respect of the PSV, EDV, TAP, PI, RI, and S/D values (p

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Vascularização uterina de éguas prenhes de jumento e de garanhão monitoradas por ultrassonografia Doppler

Abstract: RESUMO.-Este estudo teve como objetivo analisar e descrever os achados ultrassonográficos do útero de éguas gestantes de diferentes idades, de jumento e garanhão, utilizando a técnica de ultrassonografia Doppler Espec-

Cited by 5 publications

References 16 publications

Spectral Doppler ultrasound in selecting an equine embryo receiver

Spectral Doppler ultrasound in selecting an equine embryo receiver

Doppler Ultrasound in the Reproduction of Mares

Doppler Ultrasonography Assessment of Uterine Artery Blood Flow Throughout Late Pregnancy in Awassi Ewes

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