Med Quiz I Flashcards
oxytocin: classification
oxytoxic
oxytocin: indications
- induction or augmentation of labor
- must have a favorable cervix (soft, go from posterior–>anterior position, dilate and efface)
- control of postpartum bleeding
- inevitable or incomplete abortion
- antepartum contraction stress test (CST): can help determine if the fetus can tolerate labor by getting 3 contractions in 10 min w/o any nonreassuring signs in FHR (negative–>continue pregnancy; positive–>deliver)
oxytocin: action
- stimulates uterine smooth muscle resulting in inc strength, duration, and freq of uterine contractions
- vasoactive
- antidiuretic
oxytocin: contraindications
- placenta previa
- vasa previa
- nonreassuring FHR
- abnormal fetal presentation
- prolapsed cord
- presenting part above pelvic inlet
- previous classic or fundal uterine incision
- active genital herpes
- pelvic structural deformities
- invasive cervical CA
oxytocin: dosage for induction or augmentation of labor
- starting doses of 0.5 to 6 milliunits/min
- inc the dose to 1-2 milliunits/min every 15-40 min
- high dose protocols may inc dose in increments of up to 6 milliunits/min
- after adequate contraction pattern is established and cervix is dilated 5-6 cm, oxytocin may be reduced
- actual dose based on uterine response and absence of ADRs
oxytocin: dosage for control of postpartum bleeding
- IV: 10-40 units at a rate of 20-40 milliunits/min
- inc or dec rate according to uterine response and rate of postpartum bleeding
- IM: 10 units after delivery of placenta
oxytocin: dosage for inevitable or incomplete abortion
- 10 units at a rate of 10-20 milliunits/min
oxytocin: ADRs
- hypertonic uterine activity
- impaired uterine bloodflow
- uterine rupture
- abruptio placentae
- fetal asphyxia (r/t diminished uterine blood flow)
- maternal fluid retention–>water intoxication
- hypotension
- tachycardia
- cardiac dysrhythmias
- subarachnoid hemorrhage
oxytocin: nursing implications intrapartum
- assess fetal HR for at least 20 min before induction AND verify a cephalic fetal presentation w/ Leopold’s maneuver or a vaginal exam
- if nonreassuring FHR or non-cephalic, then do not begin induction until U/S is done
- observe uterine activity for establishment of effective labor pattern
- contraction every 2-3 min, duration of 40-90 sec, intensity of 50-80 mmHg
- watch for hypertonicity: contractions less than 2 min apart, rest interval shorter than 30 sec, duration longer than 90-120 sec, or resting tone greater than 20 mmHg
- if hypertonicity or nonreassuring FHR occurs, stop infusion, inc rate of nonadditive soln, position woman in side-lying, and administer O2 at 8-10 L/min
- given by pump
- titrated according to contraction pattern
- record BP, pulse, and RR every 30-60 min or with each dose inc
oxytocin: nursing implications postpartum
- administer after delivery of the shoulders of the infant to help uterus contract
- observe uterus for firmness, height, and deviation
- massage until firm if uterus is boggy
- observe lochia for color, quantity, and presence of clots
- assess for cramping
- assess V/S every 15 min
- monitor I&O and breath sounds to identify fluid retention or bladder distention
- notify provider if uterus fails to remain contracted or lochia is bright red or has clots
Misoprostol: Classification
prostaglandin E1 (PGE1) analog
Misoprostol: indications
- cervical ripening
- make the cervix more favorable so you can administer oxytocin
- induction of labor
- termination of pregnancy
Misoprostol: action
- causes uterine contractions
Misoprostol: contraindications
- if you have risk factors for uterine rupture:
- late trimester pregnancy
- previous CS or uterine surgery
- >5 pregnancies
Misoprostol: dosage
- 25 mcg vaginally
- must be prepared by pharmacist–broken from a 100 or 200 mcg tablet
- 100 mcg orally
Misoprostol: ADRs
- uterine hyperstimulation
- contraindicated in a womean with previous cesarean or other uterine surgery
Misoprostol: nursing implications
- to reduce leakage, have woman lie flat for 15-20 min after the gel form of PG is inserted
- FHR should be monitored for at least 30 min for changes
- uterus should be assessed for excessive contractions
- oxytocin induction can begin 4 hours after last dose
- if uterine hypertonicity occurs, place woman in side lying position, provide O2 at 8-10 L/min, administer tocolytic drug (terbutaline or Mg Sulfate)
Dinoprostone: classification
cervical ripening agent
Dinoprostone: indications
- cervical ripening
- make the cervix more favorable so you can administer oxytocin
Dinoprostone: action
- Produces contractions
- Initiates softening, effacement, and dilation of the cervix
Dinoprostone: contraindications
- PID
- ROM
- previous CS
- asthma
- HTN
- glaucoma
- severe renal or hepatic dysfunction
- ischemic heart dz
Dinoprostone: dosage
- 10 mg in a time release vaginal insert left in place for up to 12 hours
- remove w/ onset of active labor, membrane rupture, or uterine hyperstimulation
Dinoprostone: ADRs
- hypertonic contractions (uterine hypertonicity)
- amniotic fluid embolism
- uterine rupture
Dinoprostone: nursing implications
- remove after 12 hours or when active labor begins
- ADRs can be reduced w/in 15 min after removal
- if hypertonic uterine activity occurs, remove insert, place woman in side lying position, provide O2 at 8-10 L/min, and administer tocolytic (terbutaline or Mg sulfate)
- may occur up to 9.5 hours after placement
- to reduce leakage, have woman lie down for 2 hours after insertion
- oxytocin induction may begin 30-60 min after removal of insert