Exam 3 (module 9-11) Flashcards
Forces of labor: 5 P’s
powers, passageway, passenger, position, psyche
powers (contractions)
purpose is to dilate cervix and aid in expulsion; measured by frequency, duration, and intensity; mild = nose, moderate = chin, strong = forehead
IUPC
intrauterine pressure catheter to assess intensity of contractions; mild <40 mmHg, moderate40-70 mmHg, strong >70 mmHg
passageway
route the fetus must travel; maternal pelvis, maternal soft tissue (cervix), gynecoid it true female pelvis (~50% of women)
dilation and effacement
effacement happens first by thinning of cervix then cervix dilates
passenger
fetal attitude: relationship of fetal body parts to others (flexion or extension, you want flexion); fetal lie: relationship of infant spine to mothers spine (horizontal or longitudinal, you want longitudinal
types of cephalic presentations
~95% of the time; mentum (head extended back), brow (head extended slightly back), sinciput (head neutral, vertex/occiput (fully flexed, chin tucked)
types of breech presentations
~3-4% of the time; frank (feet by face and legs crossed, full (feet crossed low; criss-cross apple sauce), footling (one foot extended)
shoulder presentation (transverse)
~1%; not favorable for vaginal delivery; requires C-section
station
relation of presenting part of head to maternal pelvis; zero station is when presenting part engaged in pelvis at level of ischial spines; - is floating
fetal position
relation of presenting part to maternal pelvis; 3 letters; direction the presenting part faces (either mother L or R)
presenting parts of fetus
o = occiput (most common), m = mentum (chin, fetal head extended),
Sa = sacrum (breech presentation),
A = acromion process (transverse presentation)
relationship to pelvis
a = anterior, p = posterior, t = transverse
leopold maneuvers
done to determine fetal presentation and position
4 maneuvers of leopold
1st maneuver: superior side of fundus; 2nd maneuver: each side of uterus; 3rd maneuver: suprapubic area; 4th maneuver: fetal attitude and extension (only in cephalic position)
maternal assessment (antepartum)
focused assessment to determine condition of mother/baby, maternal history, maternal testing/prenatal labs
maternal history consists of
allergies, current/recent meds, pregnancy history (previous pregnancies, type of delivery, complications)
maternal testing/prenatal labs consists of
blood type/Rh, hematocrit/hemoglobin, GBS, Hep B, HIV, ultrasonography, NST
maternal physical assessment
vital signs, uterine activity, bladder status/I&O, bloody show/bleeding, membrane status, response to labor, maternal discomfort, cultural needs
fetal physical assessment
fetal presentation and station, FHR, fetal gestation and growth
external fetal heart rate monitor
toco
internal fetal heart rate monitor
requires rupture of membrane; fetal scalp electrode to measure HR and IUPC to measure contractions
Fetal heart trace
each box = 10 seconds; dark line to dark line = 1 minute
what to look for in FHR tracing
baseline FHR, variability, accelerations, periodic changes/decelerations
types of periodic changes or decelrations
early = head compression, late = placental insufficiency, variable = cord compression
FHR baseline normal
110-160
FHR tachycardia
mild: 161-180; severe: >180
FHR bradycardia
below 110bpm for >10 minutes; mild: 100-109; moderate: 70-99; severe <70
minimal variability
less than or equal to 5 bpm change
4 responses to periodic changes
accelerations, early decelerations, late decelerations, variable decelerations
marked variability
> 25 bpm
Periodic changes in FHR d/t
response to contractions and fetal movement, short term changes in rate rather than baseline, last few seconds to 1-2 minutes
FHR accelerations
increase of 15bpm and lasts 15 seconds x2; used for stress test (want accelerations), typically good reaction between SNS and PNS
Early decelerations FHR
mirror image; d/t contractions causing pressure on skull;nursing interventions do not want this to happen
late decelerations FHR
occur late in contraction, indicative of fetal hypoxia; nursing interventions: need to stop oxytocin and change pt to left lateral in order to promote perfusion
variable decelerations FHR
occur anytime during contraction, secondary to cord compression; nursing interventions: relieve compression of cord, change position, fix cord prolapse, give O2, stop pitosin
VEAL CHOP
variable = cord
early = head compression
acceleration = oxygenated fetus
late = placental problems
FHT categories
category I - normal and no intervention is required; category II - requires evaluation and continued monitoring; category III - predictive of abnormal fetus acid base status and require prompt evaluation and interventions
respiratory acidosis result of
fetal stress
initiation of labor factors
uterine stretching, oxytocin release, decreased progesterone, increased prostaglandin secretion, cortisol release, placental aging
true definition of labor
- presence of regular phasic uterine contractions increasing in frequency and intensity 2. progressive cervical effacement and dilation (blood show may or may not be present)
signs of impending labor
lightening, increased vag. d/c, increased energy (nesting), GI symptoms (N/V, diarrhea), cervical change, bloody show, ROM, lower back pain, weight loss, uterine contractions
false labor
irregular contractions, no regular pattern, discomfort in lower abd. and groin, show not present, no cervical change, contractions might stop with walking or rest; sedation will stop or decrease contractions
active labor starts at
4cm dilation; doctors want contractions 5 min apart and regular
1st stage of labor
from initiation of labor until full effacement and dilation
first stage of labor consists of
early labor, active phase, transition phase
early labor (latent phase)
0-3cm, mildly uncomfortable, every 10-30 minutes for 20-40 seconds, then every 3-7 minutes for 30-40 seconds, excited and sociable; signs of progress when contractions are longer, stronger, and closer together
active phase labor
dilation 4 to 7cm, fetal descent, contractions are stronger, last longer, closer together, every 2-5 minutes x 40-60 seconds, increase in anxiety and discomfort is normal, instinctual behavior
transition phase labor
short but intense, dilation 8 to 10cm, painful intense contractions every 1.5-2 minutes for 60-90 seconds, very irritable and may lose control, N/V is common
second stage of labor
descent and expulsion of fetus; from full dilation to birth of baby; overwhelming urge to push; increased feeling of control; pressure feeling
third stage of labor
expulsion of placenta: detaches about 5-10 minutes after birth (up to 30); signs of occurring are uterus becomes smaller, blood gushes, and cord lengthens
fourth stage of labor
immediate postpartum: first 4 hours following birth, may experience chills, afterpains, tiredness; assess for hemorrhage
psyche (emotional response)
influenced by pain, parity, age, culture, coping mech., relaxation methods, emotional factors, other discomforts, length of labor, intensity of labor, maternal positions, fetal position
pain during birth d/t
tissue anoxia, stretching of cervix (dilation), pressure on pelvic floor
non-pharmacological pain management
cutaneous stimulation strategies, sensory stimulation strategies, cognitive strategies
cutaneous stimulation strategies
counterpressure, effleurage (light massage), therapeutic touch and massage, walking, rocking, changing positions, application of heat/cold, transcutaneous electrical nerve stimulation, acupressure, hydrotherapy
sensory stimulation strategeis
aromatherapy, breathing techniques, music, imagery, use of focal points
cognitive strategies
childbirth education, hypnosis, biofeedback
pharmacological pain management
analgesia-partial or full relief of painful sensations using medication that decreases or alters pain perception; anesthesia-partial or complete loss of sensation with or without loss of consciousness
systemic analgesics
can slow down labor, can affect fetus; opioids- morphine, meperidine, fentanyl, stadol, nubain; inhaled analgesia- nitrous oxide; tranquilizers- vistaril, phenergan