Doppler ultrasonography of the umbilical artery during normal caprine pregnancy | ||||
| Mansoura Veterinary Medical Journal | ||||
| Article 3, Volume 4, Issue 2, December 2002, Page 273-281 | ||||
| Document Type: Original Articles | ||||
| DOI: 10.21608/mvmj.2002.120075 | ||||
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| Author | ||||
| A. O Hegab | ||||
| Abstract | ||||
| This investigaion was designed to study the haemodynamic changes in the umbilical artery during normal caprine pregnancy using Doppler ultrasonography. Ten nanny goats were synchronized using 2 intramuscular injections of PGF2a 12 days apart, only six were pregnant. The pregnant goats were examined, between 25 – 125 days of pregnancy, every 5 to 10 days using a combination of two – dimensional real – time ultra – sonography, color Doppler and ppulsed wave Doppler ultrasongraphy. Transrectal scanning was done using a 7 MHz vector transducer between days 25 – 50 of gestation. Thereafter, transabdominal scanning was performed using a 5 MHz linear transducer. After locating the umbilical cord by real – time ultrasonography, the umbilical artery was defined by color Doppler ultrasonography. Pulsatility index (PI), resistance index (RI) and systolic to diastolic (S / D ) ratio in the umbilical artery were measured by using pulsed wave Dopper ultrasonography. The angle of the ultrasound beam to the umbilical artery was 45*. RI and S / D ratio had a significant linear correlation with the gestational age. In conclusion, the resistance to blood flow within the umbilical artery decreases with advancement of caprine pregnancy to match the fetoplacental development. | ||||
| Keywords | ||||
| Arteries; Ultrasonography | ||||
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