نتایج جستجو برای: umbilical
تعداد نتایج: 22936 فیلتر نتایج به سال:
Vinyl catheters were inserted into an umbilical vein, a hindlimb vein and either an umbilical or dorsalis pedis artery in 9 lamb fetuses with gestational ages of 110 to 147 days. The lambs were then delivered from the uterus, but placental flow was maintained. Cannulating electromagnetic flow transducers were inserted into both umbilical veins. Antipyrine solution was constantly infused into th...
BACKGROUND It has been established that presence of lean umbilical cord with reduced Wharton's jelly in sonographic scans is a fetal marker for risk of small for gestational age at birth. With improvement of ultrasound techniques, more studies have been investigating the alterations of the umbilical cord on pregnancy outcomes. OBJECTIVES To determine the reference ranges of the umbilical cord...
The umbilical cord is a helical and tubular blood conduit connecting the foetus to the placenta. The umbilical cord achieves its final form by the 12th week of gestation and normally contains two arteries and a single vein, all embedded in Wharton's jelly. The structure of the umbilical cord receives only a cursory glance during many obstetric ultrasound examinations: with imaging limited to do...
OBJECTIVE While delayed umbilical cord clamping (UCC) is thought to facilitate placental to infant blood transfusion, the physiological factors regulating flow in the umbilical arteries and veins during delayed UCC is unknown. We investigated the effects of gravity, by changing fetal height relative to the placenta, and ventilation on umbilical blood flows and the cardiovascular transition duri...
BACKGROUND Intrapartum factors may have a role in the development of asthma and allergic diseases among offspring. OBJECTIVE To investigate the association between umbilical arterial pH values at birth and asthma, allergic rhinitis, and atopic eczema in children. METHODS We performed a case-control study of 222 asthmatic children and 183 control children aged 5 to 6 years with umbilical art...
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