1F - Induction and Augmentation of Labor Flashcards
What defines successful induction of labor?
Vaginal delivery within 24 to 48 hours
What do we call the induction of labor in the absence of acceptable fetal or maternal indications?
Elective induction
What is >5 contractions per 10 mins period averaged over 30 mins?
tachysystole
A verbal consent is enough to validate labor induction? T or F
False
What fetal lie is contraindicated for labor induction?
Footling breech and transverse lie
What bishop score is considered to be favorable for induction?
8
What bishop score indicates an unfavorable cervix?
6
What is the normal length of the cervix of a woman?
25mm
A 50% effaced cervix is shaped as?
Funnel
What is the normal shape of the endocervical canal?
Tube shaped
What anatomical structure is the basis for the station of the fetus?
Ischial spine
The position of the cervix is relative to what fetal and maternal structure?
Fetal head and maternal pelvis
A soft cervix is likened to what structure of the body?
Lips
A hard cervix is likened to what structure of the body?
Nose
When can induction of labor be advised if the patient has controlled DM with oral hypoglycemis?
39 weeks
If the mother has DM being controlled with insulin, how many weeks of gestation can induction of labor be advised?
38 weeks
How many weeks of gestation can a fetus with intrauterine growth restriction be advised for induction of labor?
36 weeks or term if possible to prevent stillbirth
What is the complication if a dead fetus is retained for more than 4 weeks?
DIC
If a mother experiences premature rupture of membranes at less than 34 weeks with no other complications, can induction of labor be advised?
No
Monitor patient, give steroids and check for chorioamnionitis
After premature rupture of membranes at more than 34 weeks(matured lungs) what risks are discussed before induction of labor?
sepsis and NICU availability
If the premature rupture of membranes occur before 32 weeks of gestation, what can we give to protect the fetus?
magnesium sulfate for neuroprotection and steroids for lung maturation
Tocolysis is recommended for PPROM before 34 weeks? T or F?
False
Induction of labor in uncomplicated twin pregnancy is recommended at what AOG?
37 weeks
What form of twin pregnancy will induction of labor be contraindicated?
Monoamniotic with 1st twin not in cephalic presentation
It is recommended to wait to 42 weeks of pregnancy before advising induction of labor? T or F?
False
At 41 completed weeks, induction of labor can be advised
*39 weeks with no complications is when we can consider induction of labor
What plant medicine is used in the Philippines as a uterotonic?
Sambong
What mechanism do the mechanical devices for induction of labor use?
Stimulation for the release of prostaglandins and local pressure
What endogenous substance is responsible for the ripening of the cervix by relaxation of smooth muscles for dilatation and increase in myometrial contractions?
Prostaglandin
What presentation is viable for induction of labor?
Cephalic presentation
When do we do CTG monitoring for induction of labor?
Before and after induction of labor
What is grand multiparity which is a contraindication to induction of labor?
5 or more previous births
What dose of dinoprostone (PGE2) is initially used for multiparous women?
1 mg
What dose of dinoprostone (PGE2) is initially used for nulliparous women with unfavorable cervix?
2 mg
What is the maximum dose per 12 hours of dinoprostone for nulliparous women with unfavorable cervix?
4 mg
3 mg for all other women
this is a synthetic PGE1 analog for cervical ripening
Misoprostol.
The mechanism for cervical dilatation and cervical ripening by stripping of membrane is by?
increase in phospholipase activity and prostaglandin
How is strpping of the membrane done?
Inserting two fingers as far from the internal os as possible and rotating twice to separate membranes from the lower segment
What is the first polypeptide synthesized to induce or augment labor?
Oxytocin
How many hours after rupture of membranes is the golden period where risk for chorioamnionitis is minimal?
24 hrs
Artificial rupture of membranes requires commitment to vaginal delivery? T or F?
True
*72 hours
Amniotomy in unengaged position poses risk for?
Cord prolapse
Sudden decompression of the uterus due to leakage by amniotomy can lead to?
Placental abruption
The fingers which control flow of amniotic fluid outward by amniotomy should only be removed after what event?
When the presenting part rests against the cervix
Amniotomy alone is recommended for induction of labor? T or f?
False
What is administered immediately or after two hours post amniotomy?
Oxytocin
Amniotomy can be used for augmentation?
Yes - when spontaneous labor is abnormally slow
What is the next step after a failed induction?
Either CS or repeat induction
For patients with pre eclampsia, what AOG can we advise induction?
34 weeks