Transrectal color Doppler sonography of the A-uterina in cyclic mares

Bollwein, H.; Maierl, Johann; Mayer, R. und Stolla, R. (1998): Transrectal color Doppler sonography of the A-uterina in cyclic mares. In: Theriogenology, Bd. 49, Nr. 8: S. 1483-1488

Abstract

Color Doppler ultrasound was used transrectally in 6 mares to locate both the left and right Aa uterniae and to obtain flow velocity waveforms at defined times (Days 0, 5, 10, 15 and 20) during 4 estrous cycles. Blood flow reflected by the resistance index (RI) was determined for both arteries on 120 occasions. As there was no significant difference and a high correlation in the RI values between the left and right arteries (paired Student's t-test, correlation coefficient r > 0.94 ; P < 0.05), the average RI value was used for subsequent analyses. There were correlations between RI values, mares and day of estrous cycle (P < 0.0001). The mean RI was higher (P < 0.05) in the 2 multiparous mares (age, 12 to 13 yr) than in the 4 younger maiden mares (age, 6 to 10 yr). During the estrous cycle mean RI values on Day 0 (day of ovulation) and Day 10 were higher (P < 0.05) than on Days 5, 15 and 20, whereas between estrous cycles within mares no differences (P > 0.05) could be measured. The results suggest that transrectal Color Doppler sonography is a noninvasive method for examining differences in impedance to uterine blood flow between different mares and cycle periods.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Tiermedizin > Veterinärwissenschaftliches Department > Lehrstuhl für Anatomie, Histologie und Embryologie
• Themengebiete: 500 Naturwissenschaften und Mathematik > 590 Tiere (Zoologie)
• ISSN: 0093-691X
• Sprache: Englisch