Unit 2 (A-D) Flashcards
Define engagement, fetal lie, and station.
Engagement: occurs when the largest diameter of the presenting part reaches or passes through the pelvic inlet.
Fetal lie:relationship of the long axis (spinal column) of the fetus to the long axis of the mother.
Station: relationship of the presenting part to an imaginary line drawn between the ischial spines of the maternal pelvis. (0)
What is fetal attitude? What is the norm?
Relation of fetal body parts to one another.
General flexion: head flexed so that chin on chest w/ arms crossed over chest and legs flexed at knees.
What are the powers of labor: forces? What do these achieve?
Primary: uterine muscular contractions. complete effacement and dilation of cervix.
Secondary: abdominal muscles. Push during 2nd stage of labor.
When should bearing down (pushing) begin? What could happen if begins too soon?
When cervix is fully dilated.
Cervical edema, retarding dilatation (process of cervix opening), tearing and bruising of cervix, and maternal exhaustion.
What physiological changes occur to the females body during labor?
Progesterone (smooth muscle relaxant): decreases so contractions take place.
Estrogen (stim uterine muscle):will increase
Connective tissue loosens permitting softening, thinning and opening of cervix.
Muscles of upper uterine segment shortens and cause cervix to thin and flatten.
Fetal body straightens as uterus elongates during contractions.
Pressure of fetal head causes cervical dilation.
Rectum/vagina drawn upward and forward each contraction.
What hormonal changes cause onset of labor?
38-42 weeks inc estrogen induces oxytocin and this stims placenta to release prostaglandins stimulating more contractions. Corticotropin RH stims prostaglandins. hyaluronic acid.
Progesterone decreases.
Fetus inc cortisol.
What are impending/premonitory signs of labor?
*Warning Signs* Lightening (engagement, allowing better breathing since diaphragm lowers. Pelvic pressure, inc venous stasis/edema/vag secretions, leg cramps) Braxton hicks Cervical changes (ripening) Bloody show (mucous plug loss-labor 24-48hrs away) ROM (SROM, PROM, PPROM) Sudden burst of energy N/V, diarrhea, backache, indigestion.
Differentiate true and false labor. Contractions Intervals Duration/intensity Discomfort Walking Cervical dilation/effacement
TRUE: contractions regular Interval between contractions shorten Contractions increase in duration/intensity Discomfort begins in back and radiates to abdomen Intensity increases w/ walking Cervical dilation/efface are progressive. FALSE: Contractions irregular No change in contraction intervals No change in duration/intensity Discomfort in abdomen only No change or lessens during walking. No dilation/effacement.
How many stages are there in labor? What occurs in each?
1st: 1-10cm dilation
2nd: 10cm to birth (fetal expulsion)
3rd: after fetus born to delivery of placenta.
4th: after placenta delivered to maternal homeostasis (1-4 Hours)
What are the 3 phases of the 1st stage of labor?
Latent (early): 1-3cm dilated, mild effacement,ROM (8.6-20hrs)
Active:4-7 cm, contractions intensify, 1.2-1.5cm/hr
Transition: 8-10 cm (1-3 hr)
Epidural slows labor down by 1 hour
What characteristics are present in phase 3 (transition) of stage 1 of labor?
Inc bloody show Hyperventilation N/v Sweat Rectal pressure Irritability/restless
What occurs in the 2nd stage of labor? Duration?
10cm crowning pushing to birth
15min to 3hrs
Spontaneous birth
Cardinal movements:
Descent: 4 forces (pressure of amnio fluid/uterine fundus, abd contract, fetal straightening) head enter inlet occipit transverse/oblique (fits pelvis best).
Flexion:fetal head meet resist in pelvis, chin goes down to chest.
Internal rotation: head rotate to anteroposterior
Extension:passing under symph
Restitution:shoulders pass oblique
External rotation:head turn to side, shoulders anteroposterior
Expulsion:anterior shoulder, posterior then body
What occurs in the 3rd stage of labor?
Placental separation
Placental delivery
What occurs in the 4th stage of labor?
Vag delivery of blood (250-500ml) (section 700-1000ml) Vs q15minX1hr, qhrX4hr Uterus position Shaking Urinary retention
In the 4th stage of labor, what are important nursing considerations?
Keeping uterus firm (prevents bleeding)-keep bladder empty (bladder can press on uterus and soften)
Watch for common changes (dec bp, inc PP with tachy, then brady)
Locating uterus
What are the maternal responses to labor?
Dec pulse, inc bp/co (in 1st 24hrs post birth)
Insensible losses
Inc o2 demand, dec paco2=metab acidosis w/ resp alkalosis (hypervent)
Pushing=inc paco2 w/ blood lactate=resp acidosis
Delivery=metabolic acidosis w/ uncompensated respiratory alkalosis
Inc renin/angio, bladder edema
Dec gastric motility, absorption, emptying
Inc wbc, dec glucose levels
Pain
What are the fetal responses to labor?
HR Dec d/t intracranial pressure Dec ph, o2 sat (try not to hold breath during pushing) Dec blood flow Sleep/active states between 36-38 wks Tactile fetal sensation
What is Leopolds maneuver?
Palpation method to determine fetal position.
When and how is internal electronic fetal monitoring done?
ROM and atleast 2cm dilated. Presenting part known and is scalp.
Do not use in STIās
Inc risk of infection
Sterile process
What are 4 childbirth prep methods? Explain each.
Lamaze:dissociative relaxation, control muscle relax, specific breath pattern
Kitzinger:chest/abd breath
Bradley:12wk session, work on controlled breath, deep abdominopelvic breath, focus on natural childbirth.
Hypnobirthing:breath/relax techniques for body to work in neuromuscular harmony.
When is it appropriate for the pregnant woman to come to the hospital for the birthing process?
ROM, contractions (5min apart X1hr, multipara:6-8min apart), vaginal bleeding, dec fetal movement.
What are the maternal nursing assessments during the 1st stage of labor?
BP, RR qhr
Latent:temp q4hr (unless over99.6, ROM then qhr), uterine contractions q30min
Active:BP, P, RR qhr, uterine cont palpated q15-30min
Transition:BP, P, RR q30min, cont q15min
What are the fetal nurse assessments during the 1st stage of labor?
FHR q30min (low risk) q15 (highrisk), fetal activity, NST Baseline 110-160
What are the maternal nurse assessments during the 2nd stage of labor?
Fetal?
BP, P, RR q 5-15min
Temp q2hr
Cont palpated continuous
Fetal: FHR q15 (q5 high risk)
What are the maternal nurse assessment during the 3rd stage of labor?
Fetal?
Bp P RR q5min, cont intermittently to assess for placenta separation.
Newborn assess at time of birth, gest age assess, neuro assess w/i 1st hr. APGAR 1 and 5 min. Initial BP, AP, RR, and T. Umbilical cord 3 vessels.
What are the maternal nursing assessment for the 4th stage of labor? Fetal?
VS 5-15 min x1st hour. Fundus, lochia, perineum, laceration/episiotomy, bladder distention, rectum q15min.
Complete exam:v/s gest age assess, phys exam, neuro reflex between hour 1-4. At 8hr, v/s and assess. Skin color q4hr.