Antepartum Assessment Flashcards
State 1F
quiescent state
State 2
REM
Active aleep
Vigorous body movement with continuous eye movement and fetal heart rate increase
State 4
Awake state
This cycle has been described as varying from about 20 to 75 mins
Sleep cyclicty
This is based of accelerations with fetal movements
Non stress test
Methods of quantifying fetal movements
Use of tocodynameter
Ultrasound
Maternal peceptions
Reassured fetal movement counting
10 distinct movements in up to 2 hours
Paradoxical chest movements is due to coughing of clear amniotic fluid debris
Fetal breathing
2 types of respiratory movements
Gasps/sighs
Irregular burst or breathing
Factors that affect fetal breathing
Hypoxia Sound stimuli Hypoglycemia AoG Impending pre term labor Cigarette smoking Amniocentesis Labor
Normal FHR
110-160
Visually apparent abrupt increase in FHR
Fetal heart acceleration
During NST, how do you wake up the baby
Vibroacoustic stimulation
What other factors that can cause loss of fetal heart rate reactivity
Fetal sleep
Medication - magnesium sulfate
smoking
What are the common causes of nonreactive non stress test
Hypoxia
Fetal distress
Neurologic depression
At least 3 in 20 minutes or lasting more than 1 minute
Worse prognosis
Repetitive variable decelerations
False normal NST
Meconium aspiration Intrauterine infection Cord accident Congenital malformation Placental abruption
Also known as contraction stress test
Oxytocin challenge test
CST is for what
Uteroplacental function
Respense to uterine contraction
Symmetrical gradual decrease and return of the fhr
Mirror image effect
Early deceleration
What causes early deceleration
Head compression
Nadir of the deceleration occurs after the pewk of contraction
Late deceleration
What can cause deceleration to be late
Uteroplacental insufficiency
Components of biophysical profile
FHR acceleration Breathing Movements Tone Amniotic fluid volume
