Intrapartum Flashcards
(268 cards)
Series of events by which uterine contractions and abdominal pressure expels the fetus and other by products of pregnancy via the birth canal
Labor
Descent and settling of the fetal head into the pevis
Engagement
Spaces b/n bones of the fetal head
Fontanels
Division b/n bones f the fetal head
Sutures
What are the 5 theories in labor
- Uterine stretch theory
- Oxytocin theory
- Progesterone deprivation theory
- Prostaglandin cascade theory
- Theory of aging placenta
The idea of this theory is based on the concept that any hollow body organ, when stretched to its capacity will inevitably contract to expel its contents
Uterine stretch theory
According to this theory, the uterus, a hollow organ, bcms stretched due to the growing fetal structures, in return, the pressure increases causing physiologic changes (uterine contractions) that initiate labor.
Uterine stretch theory
According to this theory, pressure on the cervix stimulates the hypophysis to release oxytocin from the maternal posterior pituitary gland.
Oxytocin theory
What is released due to the pressure on the cervix which would then stimulate the hypophysis to release it
Oxytocin
The presence of this hormone causes the initiation of contraction of the smooth muscles of the body
Oxytocin
According to this theory, progesterone has the ability to inhibit motility, thus, if its amount decreases, labor pains occur
Progesterone deprivation theory
This hormone is designed to promote pregnancy and is believed to inhibit uterine motility
Progesterone
What theory indicates that increase in prostaglandin causes uterine contraction thus, labor is initiated
Prostaglandin Cascade theory
What hormone does fetal membrane and uterine increase?
Prostaglandin
A decrease in progesterone amounts also elevates what hormone?
Prostaglandin
According to this theory, Uterine contractions is caused by the decrease in blood supply to the uterus due to advance placental age
Theory of aging placenta
What are the 6 steps in initiation of labor
- Baby moves deeper into mother’s birth canal
- Pressoreceptors in cervix of uterus excited
- Afferent impulses to hypothalamus
- Hypothalamus sends efferent impulses to posterior pituitary, where oxytocin is stored
- Posterior pituitary releases oxytocin to blood; oxytocin targets mother’s uterine muscle
- Uterus responds by contracting more vigorously
What are the 7 preliminary signs of labor
- lightening
- activity level
- braxton hick’s contraction
- overt loss of weight
- ripening of cervix
- Buttersoft ruptured BOW
- Show
Does activity during labor increase or decrease?
Increase
Does false labor would later on turn into true labor?
Yes
False labor or True labor:
Contractions remain irregular
False labor
False labor or True labor:
Contractions may be slightly irregular at first but become regular and predictable in a matter of hours
True labor
False labor or True labor:
The pain is generally confined to the abdomen
False labor
False labor or True labor:
The pain is first felt in the lower back and sweep around to the abdomen in a girdle like fashion
True labor