exam 4-lp7 Flashcards
Fertilization
fuses/makes
how does penetration happen
when take pregnancy test
who determines gender
Fetal Development
sperm fuses to ovum and makes zygote
all sperm surround ovum, only one will penetrate
women can take pregnancy test after first missed period to see HCG
males determine gender
fertilization-fetal development
how long is ovum fertile
how long is sperm fertile
how long for implantation
ovum is fertile for 24 hrs after release from fallopian tubes
sperm is viable in female tract from 48-72 hrs
takes 8-10 days for implantation
how are
paternal
identical
twins made
faternal twins are two separate ovum and 2 separate sperm
identical are one sperm and ovum that randomly divide
Functions of Amniotic Fluid
constantly
absorbed/back
once kidney
filled
Fetal Development
constantly changing as baby swallows fluid
absorbed into fetal blood stream and back into placenta into moms bloodstream
once kidneys develop urine will develop
cushy water filled sac
Amniotic fluid will protects from what
regulates
allows
helps w/
Functions of Amniotic Fluid
amniotic fluid will protect baby from pressure/blows from moms abdomen
regulate temperature
allows for movements
helps with umbilical cord
normal amniotic fluid–how much
hydramnios/ Polyhydramnios-how much
Oligohydramnios–how much
normal is 800-1200 mls of amniotic fluid
poly- over 2000 mls of amniotic fluid
oligo- less then 400 mls of amniotic fluid
Umbilical Cord
of arteries and veins
arteries do what
viens do what
AVA” 2 Arteries and 1 Vein
Arteries carry unoxygenated blood AWAY from fetus
Vein carries oxygenated blood TO fetus
Development and Functions of the Placenta
when start
place where
exchange, function–main functions
functions like
functions start at 3-4 weeks
Place where nutrient and metabolic exchange takes place.
gas exchange, nutrition, excerction and endocrine function
Functions like the fetal lungs
4 weeks
8 weeks
8-12 weeks
16-20 weeks
24 weeks
Important Milestones in Development
4 weeks: heart is formed
8 weeks: organs formed; facial features discernable
8-12 weeks: fetal heart rate heard with Doppler
16-20 weeks: fetal movements felt by mother
24 weeks: fetal respiratory movements begin;
low-end age of viability
Fetal Circulation
bypasses
most blood bypasses lungs because gas exchange occurs in placenta
How does fetal circulation differ
lungs in mom
lungs in birth
3 shunts
Fetal lungs are fluid filled while in mom
as baby is born fluid leaves lungs
3 shunts-
Ductus venosus
Foramen Ovale
Ductus Arteriosis
Ductus venosus
allow
Allows blood to bypass liver and go to inferior vena cava
Foramen Ovale
allows
Allows blood to pass from right atrium to left atrium
Ductus Arteriosis
allows
Allows blood to pass from pulmonary artery to aorta.
why will shunts close
allows for
close due to cold air
allow for start of respiratory circulation
-Intrauterine Factors-
fetal lung development-surfactant
surf develops/peaks
if premature
Fetal lung development-surfactant -helps with expansion
surfactant develops at 24 weeks/peaks 35
if premature might give surfactant shot to build up lungs
Respiratory Adaptations
abnormalities
shunts
Newborn Physiologic Responses
Respiratory Adaptations are the most important part to watch for
any abnormalities follow up on
shunts should close to stimulate breathing
Mechanical events
TS
comes out
pressure
Initiation of breathing
Newborn Physiologic Responses Respiratory Adaptations
-thoracic squeeze.
when baby comes out vaginal canal, fluid is squeezes out lungs
and pressure changes causes breath and expansion
Chemical stimuli
decrease
no longer
Initiation of breathing
Newborn Physiologic Responses Respiratory Adaptations
decrease of placental exchange
placenta will not longer breath for baby
Thermal stimuli
what prompts
stimulates
Initiation of breathing
Newborn Physiologic Responses Respiratory Adaptations
coldness prompts baby to take deep breathes
cold air stimulates crying
Sensory stimuli
what stimulates
what do you want
Initiation of breathing
Newborn Physiologic Responses Respiratory Adaptations
lights
sounds
gravity
talking
rubbing
you want baby to scream and cry
Newborn Breathing
adjusting
What is normal
retractions
baby will have trouble adjusting to real world
normal-irregular patterns-30-60 bpm
retractions may be near clavicle and her bottoms of ribs
Signs of Respiratory Distress
retractions
cyanosis
nasal flaring
grunting
apnea-normal/abnormal
Retractions-pulling in and body is sucking itself in-caving in
Cyanosis-blueish color from not enough oxygen
Nasal flaring
–Obligatory nose breathers
Grunting-audibly hear
Periodic Breathing Pattern
–Apnea
—–Less than 20 secs with no cyanosis=normal
——-Greater than 20 seconds=abnormal
Feeding an infant in respiratory distress
could indicate
could indicate that a duct didn’t close properly
when would you not want a baby to cry
if meconium or no suction
lung sound assessment-whatdo first
what helps calm down
listen to lungs first in assessment-so before crying
if baby is crying-gloved fingers or pacifiers may calm down
Transitional Physiology
3 closures
murmurs
go away
Birth: Physiologic Responses
Cardiovascular Adaptations
Closure of Foramen Ovale
Closure of Ductous Arteriosis
Closure of Ductous Venosis
murmurs may result as incomplete closure of these
murmurs should go away soon
acrocyanosis
what is it
why happens
can be/subsides
Birth: Physiologic Responses
Cardiovascular Adaptations
bluish discoloration of hands and feet
immature peripheral circulation
can be completely normal and will subside after 24 hrs
heart rate
normal
sleep
crying
Newborn Physiologic Responses
Cardiovascular Adaptations
120-140 bpm
90-110 during deep sleep is ok;
up to 180 if crying)
blood pressure
initially
first year
need
not indicator
Newborn Physiologic Responses
Cardiovascular Adaptations
Blood Pressure initially around 80/46,
then 100/50 average for the first year
Need correct cuff size
Not an accurate indicator for distress
screen
detects
clamping of cord-allows
clamping-helps
Newborn Physiologic Responses
Cardiovascular Adaptations
Newborn screen completed before leaving hospital to detect congential heart defects
clamping of umbilical cord allows cardiac changes to occur
helps close structures and first breath
intense distress baby
dont do
can cause
do do
do not feed a baby that is in intense distress
can cause aspiration
start oxygen or nebulizers or X-ray or iv to regulate nutrition/breathing
Blood pressure measurement using a Doppler device
– not always done routinely
Hematopoetic System
initial
once properly
inc can cause
Newborn Physiologic Responses
Initial decline in hemoglobin over first 2 months
once baby is properly oxygenated the need for a high RBC count diminishes
increased hemoglobin can cause jaundice because of rabbit destruction of rbc which causes elevated bilirubin
Leukocytosis
increases
difficult
s/s of infection
- increased WBCs d/t birth and stress in the first few days of life
—Makes it difficult to assess infection
s/s of infection-dehydration, poor eating, lowtemp, lethargy
Temperature Regulation
decreases/thin
blood vessels
posture
make sure
normal temp-
Factors affecting stability
Birth: Physiologic Responses
Decreased fat and thin epidermis
Blood vessels close to skin (more sensitive to environmental temps)
Flexed posture (less surface area exposed to environment, heat loss reduced).
make sure baby is wrapped up tightly
Normal Temp
97.6 – 98.6ºF (axillary)
Methods of heat loss
convection -what is it
examples
- convection -flow of heat from body surface to cooler surrounding air- air conditioner /open window
evaportaion- what is it
examples
loss of hear through conversion of a liquid to a vapor
amniotic fluid evaporation when born
conduction-what is
example
-transfer of heat to solid object in contact with baby-
cold stethoscope on skin
radiation-what is it
examples
transfer of body hear to a cooler solid object not in contact with baby
heat from baby moving to an open window
Heat Production
NST
BAT
Newborn Physiologic Responses
Temperature Regulation
Nonshivering thermogenesis (NST)
Brown fat/Brown Adipose Tissue (BAT– skin detects change in template and will use brown fat to change temperature
Pathology altering ability to generate heat
indicator of specific problems
Newborn Physiologic ResponsesTemperature Regulation
decrease in temperature can be indicator of problems–
Hypoxia
Acidosis
Hypoglycemia- Blood glucose first 24 hrs can be 30// standard is 40-45
Effects of certain drugs (Demerol given to mom in labor)
Iron storage and RBC Production-
when destroyed
iron is stored where-why
Newborn Physiologic Responses
Hepatic Adaptations
as RBCs are destroyed after birth,
the iron is stored in the liver until needed for new RBC production
Conjugation of Bilirubin
placenta/liver
start
liver performs
Newborn Physiologic Responses
Hepatic Adaptations
placenta took care of RBC breakdown, now liver needs to start to do
takes a few days for liver to start functioning
liver performs breakdown of bilirubin and breakdown goes through bowel movements and gives stool its color
Conjugation of Bilirubin
direct
indirect
What happens if bilirubin is too high -get
Hepatic Adaptations
Direct-water soluble
Indirect-non excrete able and can be potentially toxic
high bilirubin can cause nuerological issues-get daily labs
Physiologic Jaundice
caused by(accelerated, impaired, increased)
is this normal /when
Newborn Physiologic Responses
Hepatic Adaptations
(caused by accelerated RBC destruction, impaired conjugation, increased bili reabsorption from intestine)
NORMAL RESPONSE BY NEWBORN
Signs after first 24 hrs
Physiologic Jaundice-labs-
treatment
/dangerous
light therapy when
treatment is when lab goes as high as 10-12
more then 20 is dangerous to infant
light therapy at 15
breastfeeding jaundice
breastmilk jaundice
Pathologic Jaundice
one other cause
Newborn Physiologic Responses
Hepatic Adaptations
Breastfeeding Jaundice- (caused by poor feeding practices)
BreastMIlK Jaundice -caused by milk composition.
Pathologic Jaundice- signs WITHIN 24hrs of life.
vacuum can cause jaundice
treting jaunduice
therapy
skin
want/much
light therapy with eye protection
as much skin exposed as possible
want baby to eat and have as much bowel movements as possible-gets rid of bilirubin
Blood Coagulation
what is
cannot make
needed
given when
where given
Newborn Physiologic Responses
Vitamin K
(cannot make vitamin K at birth due to absence of normal flora in GI system)
needed for clotting factors
given at first day of birth
im Injection into thigh
nutrition
—Caloric Requirements
first 10
—Weight loss
Newborn GI Adaptations
—Caloric Requirements–110-120 calories per kilogram per day to keep up with growth
first 10 days are toughest since digestive system is immature
—Weight loss- baby can lose up to 10% of birthweight
Regurgitation
what is
due to
dont
often
Newborn GI Adaptations
spit up of food
due to immature sphincter in stomach
dont overfeed
burp as often as possible- to expel gas so they feel less full