DERIVACIONES ARTERIOVENOSAS EN EL PEDICULO VASCULAR UTERO-OVÁRICO DE LA PERRA (CANIS FAMILIARIS)
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Mediante técnica de disección simple, clarificación de tejidos, maceración tisular y microscopía electrónica de barrido, se estudió la vascularización de los genitales internos de la perra (Canis familiaris) en un total de nueve (9) hembras cíclicas. Este estudio demostró que el tracto reproductivo está irrigado principalmente por las arterias ovárica, uterina, vaginal y vestibular, las cuales establecen anastomosis ipsilaterales entre todas ellas y contralaterales entre la uterina, vaginal y vestibular. En el ligamento ancho, la vena uterina forma un circuito de dos ramas que se anastomosan craneal y caudalmente para permitir la conexión venosa entre el ovario y el cuerno ipsilateral. La vena ovárica presenta una válvula bicúspide bien desarrollada aproximadamente a 3 cm. del polo caudal del ovario. En esta área, la arteria ovárica emite varias ramas que establecen una conexión vascular directa entre la arteria y la vena, siendo la primera vez que se reporta una evidencia microfotográfica de anastomosis arteriovenosas en el pedículo vascular interovárico.
Venoarterial Pathways in the Uteroovarian Pedicle of the Bitch (Canis familiaris)
ABSTRACT
A corrosion cast technique, tissue-clearing technique, light microscopy, and scanning electron microscopy were used to study the female internal genitalia venous and arterial system and the venoarterial relationships at the uteroovarian vascular pedicle in nine cycling bitches. This study showed that reproductive tract was irrigated by the ovarian, uterine, vaginal and vestibular arteries wich established ipsilateral anastomoses between all of them and contralateral anastomoses between uterine, vaginal and vestibular arteries. In the broad ligament the uterine vein forms a circuit of two branches that anastomose cranial and caudally to produce a venous connection between the ovary and the ipsilateral uterine horn, allowing a venous relationship among these two structures. The ovarian vein shows a bicuspid valve at approximately 3 cm from the ovarian caudal pole. In this area, the ovarian artery emits several branches to establish direct vascular connections between artery and vein. This is the first microphotografic evidence of venoarterial pathways at the uteroovarian vascular pedicle.
Venoarterial Pathways in the Uteroovarian Pedicle of the Bitch (Canis familiaris)
ABSTRACT
A corrosion cast technique, tissue-clearing technique, light microscopy, and scanning electron microscopy were used to study the female internal genitalia venous and arterial system and the venoarterial relationships at the uteroovarian vascular pedicle in nine cycling bitches. This study showed that reproductive tract was irrigated by the ovarian, uterine, vaginal and vestibular arteries wich established ipsilateral anastomoses between all of them and contralateral anastomoses between uterine, vaginal and vestibular arteries. In the broad ligament the uterine vein forms a circuit of two branches that anastomose cranial and caudally to produce a venous connection between the ovary and the ipsilateral uterine horn, allowing a venous relationship among these two structures. The ovarian vein shows a bicuspid valve at approximately 3 cm from the ovarian caudal pole. In this area, the ovarian artery emits several branches to establish direct vascular connections between artery and vein. This is the first microphotografic evidence of venoarterial pathways at the uteroovarian vascular pedicle.
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