Comprehensive Nursing Review: Labor, Birth, Complications, and Pain Management

Comprehensive vocabulary flashcards covering the pathophysiology, clinical assessments, diagnostics, nursing interventions, and pharmacology of labor, delivery, obstetric complications, hemorrhagic disorders, and labor pain management.

Periviable

A stage of pregnancy spanning from $20\,\text{weeks}$ to $25\,\text{weeks and 6 days}$ of gestation.

Disenfranchised Grief

Grief experienced following perinatal loss that may not be openly acknowledged, socially validated, or publicly recognized by society.

Preterm Labor

Regular uterine contractions accompanied by progressive cervical dilation and effacement occurring prior to $37\,\text{weeks}$ of gestation.

Braxton Hicks Contractions

False labor contractions that are typically irregular in frequency, do not cause progressive cervical change, and often diminish or cease with rest or ambulation.

Fetal Fibronectin (fFN)

A biochemical marker obtained via vaginal swab where a negative result indicates that delivery within $2\,\text{weeks}$ is highly unlikely; results can be invalidated by recent intercourse, vaginal bleeding, or ruptured membranes.

Terbutaline

A subcutaneous beta-2 adrenergic agonist used as a tocolytic to relax the uterus; it must be withheld if the maternal heart rate exceeds $120/\text{min}$, and clients must be monitored for tremors, hyperglycemia, and pulmonary edema.

Nifedipine

An oral calcium channel blocker used as a tocolytic; nursing considerations include monitoring blood pressure and heart rate, implementing fall precautions, avoiding grapefruit products, and withholding the dose if systolic blood pressure is below $90\,\text{mmHg}$.

Indomethacin

A nonsteroidal anti-inflammatory drug (NSAID) administered as a first-line tocolytic agent to inhibit prostaglandin synthesis and suppress preterm uterine contractions.

Magnesium Sulfate

An intravenous central nervous system depressant administered for tocolysis or fetal neuroprotection; toxicity thresholds include deep tendon reflexes of $0\text{--}1+$, respiratory rate below $12/\text{min}$, oxygen saturation below $95\%$, urine output below $30\,\text{mL/hr}$, and serum levels above $8\,\text{mEq/L}$ (normal therapeutic range $1.7\text{--}2.2\,\text{mEq/L}$).

Calcium Gluconate

The emergency intravenous antidote kept immediately accessible at the bedside to reverse magnesium sulfate toxicity and neuromuscular depression.

Betamethasone

An antenatal corticosteroid administered at $12\,\text{mg IM}$ for two doses spaced $24\,\text{hours}$ apart between $24$ and $34\,\text{weeks}$ of gestation to stimulate fetal surfactant production and accelerate lung maturation.

Cervical Insufficiency

Painless shortening (cervical length $< 25\,\text{mm}$) and dilation of the cervix during the second trimester in the absence of uterine contractions, increasing the risk of preterm birth or mid-trimester pregnancy loss.

Cerclage

A surgical purse-string suture placed around the cervix between $12$ and $16\,\text{weeks}$ (or up to $24\,\text{weeks}$ emergently) to prevent premature dilation, typically removed near term at $36\text{--}37\,\text{weeks}$.

Premature Rupture of Membranes (PROM)

The spontaneous rupture of the amniotic sac and leakage of fluid prior to the onset of labor contractions, occurring at any gestational age.

Preterm Premature Rupture of Membranes (PPROM)

The spontaneous rupture of the amniotic sac and leakage of fluid occurring before $37\,\text{weeks}$ of gestation.

Prolonged Rupture of Membranes

Amniotic membrane rupture persisting for longer than $24\,\text{hours}$ before delivery, which markedly increases the risk of chorioamnionitis and neonatal infection.

Fern Test

A qualitative diagnostic assessment in which a sample of vaginal fluid air-dries on a glass microscope slide into a characteristic arborization or palm-leaf crystalline pattern, confirming the presence of amniotic fluid.

Nitrazine Test

A chemical pH test where test paper turns blue upon contact with alkaline amniotic fluid ($\text{pH } 7.1\text{--}7.3$), distinguishing it from normally acidic vaginal secretions ($\text{pH } 4.5\text{--}6.0$).

Chorioamnionitis

Infection and inflammation of the fetal membranes and amniotic cavity, treated primarily with intravenous ampicillin every $6\,\text{hours}$ combined with gentamicin every $8$ or $24\,\text{hours}$.

Dysfunctional Labor (Dystocia)

Abnormal, difficult, or protracted labor progression resulting from ineffective uterine contractions, abnormal fetal presentation or position, cephalopelvic disproportion, or failure of cervical dilation and descent.

Tachysystole

Excessive uterine contraction activity defined as greater than $5$ contractions within a $10\text{-minute}$ window, averaged over a $30\text{-minute}$ monitoring period.

Frank Breech

The most common fetal breech presentation, characterized by flexed fetal hips and extended knees with the feet positioned up alongside the fetal head.

Complete Breech

A fetal breech presentation in which both hips and knees are fully flexed, resembling a cannonball position with the buttocks presenting first.

Footling Breech

A fetal breech presentation where one or both fetal hips are extended, resulting in one or both feet presenting first into the pelvic inlet.

External Cephalic Version (ECV)

An elective obstetric procedure in which the provider manually rotates the fetus from a breech or transverse lie to a cephalic presentation through the maternal abdominal wall, usually preceded by a tocolytic and followed by $30\text{--}60\,\text{minutes}$ of fetal monitoring.

Amnioinfusion

The infusion of room-temperature or warmed normal saline or lactated Ringer's solution into the uterine cavity via an intrauterine pressure catheter (IUPC) to relieve umbilical cord compression or dilute meconium.

Umbilical Cord Prolapse

An obstetric emergency wherein the umbilical cord descends alongside or below the fetal presenting part, leading to severe cord compression, sudden fetal bradycardia, or profound variable decelerations.

FRROMAI

An emergency mnemonic for umbilical cord prolapse interventions: Fetal presenting part elevated with a sterile-gloved hand, Rapid response team notified, Reposition client (knee-chest or Trendelenburg), Oxytocin discontinued, Monitor FHR continuously, Apply oxygen if prescribed, and Insert IV/urinary catheter.

Placental Abruption

The premature detachment of a normally implanted placenta from the uterine decidua prior to birth, presenting with sudden sharp abdominal or back pain, a board-like rigid and tender uterus, and visible or concealed dark vaginal bleeding.

Placenta Previa

An abnormal placental implantation overlying or encroaching upon the internal cervical os, classically presenting with painless, bright-red vaginal bleeding in the second half of pregnancy; digital vaginal examinations are strictly contraindicated.

Kleihauer-Betke Test

A maternal diagnostic blood assay used to detect and quantify the presence of fetal erythrocytes in the maternal circulation, guiding management in suspected abruption or maternal-fetal hemorrhage.

Uterine Rupture

A catastrophic tear through the entire thickness of the uterine wall, characterized by a sudden loss of uterine tone or contractions, severe abdominal pain, loss of fetal station, and acute fetal bradycardia.

Uterine Dehiscence

Incomplete separation or thinning of a prior uterine scar or uterine wall without complete rupture, where the overlying serosa remains intact and fetal parts are not extruded.

Shoulder Dystocia

An obstetric emergency occurring during vaginal birth when the fetal head delivers, but the anterior shoulder becomes wedged behind the maternal symphysis pubis.

Turtle Sign

The sudden retraction of the fetal head back against the maternal perineum following delivery, signaling potential shoulder dystocia.

McRoberts Maneuver

An emergency positioning intervention for shoulder dystocia involving hyperflexion and abduction of the maternal thighs and legs against the maternal abdomen to widen the pelvic outlet.

CAMPEER

An emergency mnemonic for resolving shoulder dystocia: Call for help, Apply suprapubic pressure (never fundal pressure), Movement of the fetal arm across the head by the provider, Position client on hands and knees, Episiotomy preparation, Elevate legs toward chest (McRoberts maneuver), and Rotation of the fetus manually.

Visceral Pain (Labor)

Labor discomfort prominent during the first stage of labor caused by uterine contractions, cervical effacement, and cervical dilation, typically felt in the lower abdomen, lower back, and upper legs.

Somatic Pain (Labor)

Sharp, intense, localized labor pain occurring during the second stage of labor and descent, caused by distension, traction, and stretching of the pelvic floor, vagina, and perineal tissues.

Effleurage

A nonpharmacological cutaneous pain-relief technique involving light, rhythmic, circular stroking of the maternal abdomen or lower back during contractions.

Counterpressure

A nonpharmacological comfort technique involving continuous, firm manual pressure applied to the maternal sacrum or hips using a palm, fist, or tennis ball to alleviate back labor.

Acupressure

A nonpharmacological method applying firm pressure to specific bodily acupoints using the hands or an appropriate tool without needles to promote endorphin release and relieve labor pain.

Acupuncture

A nonpharmacological pain management modality that involves inserting fine needles into specific somatic anatomical points, which must be performed exclusively by a trained, certified provider.

Hypnosis (Labor Pain Management)

A nonpharmacological cognitive technique using a focused, trance-like state to promote relaxation and pain coping; it requires practice prior to labor and is explicitly contraindicated in clients with psychosis.

Nalbuphine

An opioid agonist-antagonist analgesic used for systemic labor pain; it must be avoided in clients with opioid use disorder because it can precipitate immediate, severe opioid withdrawal.

Naloxone

A pure opioid antagonist administered intravenously to reverse opioid-induced central nervous system and respiratory depression in either the mother or the neonate.

Pudendal Block

A transvaginal local anesthetic injection around the pudendal nerve near the ischial spines, providing targeted perineal anesthesia during pushing, episiotomy, or repair without neonatal systemic effects.

Epidural Analgesia

A regional anesthetic technique placed in the lumbar epidural space that serves as the gold standard for labor pain relief; maternal hypotension (systolic BP $< 100\,\text{mmHg}$ or a $25\%$ decrease) is a major complication that can compromise uteroplacental perfusion.

Combined Spinal-Epidural (CSE)

A multimodal regional analgesic technique injecting an intrathecal opioid/anesthetic for rapid initial pain relief combined with an indwelling epidural catheter for continuous, titratable long-term analgesia.

Spontaneous Abortion

The unintended loss of a pregnancy prior to viability (occurring in up to $26\%$ of pregnancies), classified into threatened, inevitable, incomplete, complete, missed, and septic types, most commonly caused by fetal chromosomal abnormalities.

Complete Hydatidiform Mole

A gestational trophoblastic disease caused by fertilization of an empty ovum by a single sperm ($46\text{,XX}$ pattern), resulting in diffuse trophoblastic hyperplasia without an embryo, markedly elevated hCG levels ($> 100,000\,\text{mIU/mL}$), and characteristic dark 'prune-juice' vaginal bleeding.

Partial Hydatidiform Mole

A gestational trophoblastic lesion caused by fertilization of a normal ovum by two sperm ($69\text{,XXY}$ pattern), presenting with triploid chromosomal abnormal embryonic tissue and focal hydropic villi.

Ectopic Pregnancy

The extrauterine implantation of a fertilized ovum, most frequently within the ampulla of the fallopian tube, presenting with pelvic pain, delayed menses, and vaginal bleeding; rupture causes life-threatening hemoperitoneum and hypovolemic shock.

Methotrexate (Obstetric Use)

A folic acid antagonist administered to medically manage an unruptured, hemodynamically stable ectopic pregnancy; client education includes avoiding alcohol, folic acid supplements, gas-producing foods, sun exposure, vigorous exercise, and sexual activity.

Factor V Leiden

The most common inherited thrombophilia, characterized by resistance to activated protein C, predisposing pregnant clients to an increased risk of venous thromboembolism (VTE).

Antiphospholipid Syndrome (APS)

An acquired autoimmune clotting disorder defined by the presence of antiphospholipid antibodies, associated with clinical features such as recurrent pregnancy loss, preeclampsia, and placental abruption.

The 5 P's of Labor

The five essential interconnected components that determine the progression and outcome of labor: Passenger (fetus and placenta), Passage (bony pelvis and soft tissues), Powers (uterine contractions and pushing), Position (maternal posture), and Psyche (maternal emotional state and coping).

Lightening

The physiological descent and settling of the fetal presenting part into the maternal pelvic inlet before labor onset, which relieves diaphragmatic pressure but increases pelvic pressure and urinary frequency.

Bloody Show

The expulsion of blood-tinged cervical mucus resulting from the rupture of superficial cervical capillaries as the cervix softens, effaces, and dilates.

Fetal Molding

The temporary cranial adaptation wherein the fetal skull bones shift, overlap, and elongate along cranial sutures during vaginal delivery to facilitate passage through the birth canal.

Latent Phase of Labor

The early phase of the first stage of labor characterized by milder, irregular contractions and gradual cervical dilation from $0$ to $5\,\text{cm}$.

Active Phase of Labor

The progressive phase of the first stage of labor characterized by stronger, established contractions and rapid cervical dilation from $6$ to $10\,\text{cm}$.

Leopold Maneuvers

A systematic four-step abdominal palpation method used to determine fetal lie, presentation, position, and engagement, assisting in optimal placement of external fetal monitoring devices.

Tocodynamometer (TOCO)

An external electronic pressure sensor placed over the maternal uterine fundus that measures contraction frequency and duration, but cannot reliably measure actual intra-amniotic contraction intensity.

Intrauterine Pressure Catheter (IUPC)

An internal electronic catheter placed directly into the uterine cavity following membrane rupture that accurately records contraction frequency, duration, resting tone, and intensity in Montevideo units (MVUs).

Cervical Dilation

The progressive widening and opening of the external cervical os, documented in centimeters ranging from $0\,\text{cm}$ (completely closed) to $10\,\text{cm}$ (completely dilated).

Cervical Effacement

The progressive shortening, thinning, and drawing up of the cervix during labor, documented as a percentage from $0\%$ (thick/uneffaced) to $100\%$ (fully thinned/effaced).

Fetal Station

The relationship of the lowest bony portion of the fetal presenting part to an imaginary horizontal line between the maternal ischial spines, scored in centimeters from $-5$ (high above the spines), to $0$ (level with the ischial spines), to $+5$ (at the vulva/outlet with birth imminent).

Fetal Heart Rate (FHR) Baseline

The mean fetal heart rate rounded to increments of $5\,\text{bpm}$ measured over a $10\text{-minute}$ monitoring segment (excluding accelerations, decelerations, and marked variability), with a normal baseline of $110\text{--}160\,\text{bpm}$.

Moderate FHR Variability

Fluctuations in the baseline fetal heart rate with an amplitude range of $6\text{--}25\,\text{bpm}$, serving as a highly reassuring indicator of intact fetal neurologic status and adequate oxygenation.

FHR Acceleration

An abrupt, visually apparent increase in the fetal heart rate above baseline lasting at least $15\,\text{seconds}$ with a peak of at least $15\,\text{bpm}$ above baseline in pregnancies at or beyond $32\,\text{weeks}$ (the $15 \times 15$ rule).

Early Deceleration

A gradual, symmetrical decrease in fetal heart rate whose nadir coincides with the peak of a uterine contraction, caused by transient fetal head compression; it is a benign finding requiring ongoing observation.

Variable Deceleration

An abrupt drop in fetal heart rate from baseline that typically forms a V, U, or W shape, caused by umbilical cord compression; the priority nursing action is to reposition the mother.

Late Deceleration

A gradual decrease in fetal heart rate whose nadir occurs after the peak of a contraction, caused by uteroplacental insufficiency; priority interventions include lateral positioning, intravenous fluid bolus, stopping oxytocin, and provider notification.

Prolonged Deceleration

A clinically significant drop in fetal heart rate of at least $15\,\text{bpm}$ below baseline lasting at least $2\,\text{minutes}$ but less than $10\,\text{minutes}$, requiring immediate intrauterine resuscitation.

Sinusoidal FHR Pattern

An ominous, smooth, regular, undulating wave-like baseline FHR tracing occurring in a cycle over $20\,\text{minutes}$, indicative of severe fetal compromise, severe fetal anemia, or fetal acidosis.

Category I FHR Tracing

A normal, reassuring fetal heart rate tracing characterized by a baseline of $110\text{--}160\,\text{bpm}$, moderate variability, absence of late or variable decelerations, and early decelerations and accelerations that may be present or absent.

Category III FHR Tracing

An abnormal, nonreassuring fetal heart rate tracing requiring immediate evaluation and action, characterized by absent baseline variability accompanied by recurrent late decelerations, recurrent variable decelerations, bradycardia, or a sinusoidal pattern.

Primigravida

A client who is experiencing pregnancy for the very first time.

Multigravida

A client who has been pregnant more than once.