Intrapartum and Fetal Monitoring Nursing Concepts

Comprehensive vocabulary flashcards covering labor stages, maternal pelvimetry, fetal presentations, contraction assessments, Leopold maneuvers, and fetal heart rate monitoring tracings.

Dilation

The gradual widening and opening of the cervix during labor, measured from $0\text{ to }10\text{ cm}$.

Effacement

The progressive thinning and shortening of the cervix during labor, quantified as a percentage from $0\text{ to }100\%$.

Ferguson Reflex

The spontaneous maternal neuroendocrine urge to bear down and push.

Fetal Station

The relationship of the presenting fetal part to the level of the maternal ischial spines, scored from $-5\text{ to }+5$, where $0\text{ station}$ signifies engagement at the spines.

Engagement

The clinical milestone reached when the fetal presenting part descends to $0\text{ station}$, level with the maternal ischial spines.

The 5 P's of Labor

The five essential factors governing the labor process: Passage (maternal pelvis and cervix), Passenger (fetus, placenta), Position (station and engagement), Powers (contractions and pushing), and Psyche (maternal emotional state and support).

Gynecoid Pelvis

The most common maternal pelvic architecture, recognized as the optimal and ideal shape for vaginal delivery.

Android Pelvis

A maternal pelvic structure resembling a male pelvis, carrying an elevated risk of cephalopelvic disproportion.

Platypelloid Pelvis

The least common maternal pelvis shape, featuring a flattened transverse contour that frequently requires a cesarean section ($\text{c/s}$).

Posterior Fontanel

The triangular fontanel situated on the fetal skull that normally closes by $6\text{ to }8\text{ weeks}$ of age.

Anterior Fontanel

The diamond-shaped fontanel on the fetal cranium that normally closes around $18\text{ months}$ of age.

Biparietal Diameter

The largest transverse measurement of the fetal skull, situated between the two parietal bones.

Fetal Attitude

The posturing and relationship of fetal body parts to one another, ideally consisting of full flexion with the chin on the chest and extremities drawn toward the center.

Fetal Presentation Diameters

Anteroposterior diameters of the fetal head presenting to the pelvic inlet depending on flexion: suboccipitobregmatic (full flexion), occipitofrontal (moderate flexion/military), occipitomental (extension/brow), and submentobregmatic (hyperextension/face).

Frank Breech

A fetal breech presentation in which the hips are flexed and the knees are fully extended upward toward the chest.

Complete Breech

A fetal breech presentation in which both hips and knees are completely flexed.

Fetal Pelvic Positions

Orientations of the fetal landmark (such as the occiput, mentum, or sacrum) relative to the maternal pelvis (right/left, anterior/posterior/transverse), including ROA, ROT, ROP, LOA, LOT, and LOP.

Primary Powers

Involuntary uterine muscle contractions described by their frequency, duration, and intensity.

Secondary Powers

Voluntary maternal bearing-down efforts utilizing the abdominal muscles during the second stage of labor.

True Labor

Uterine contractions occurring at regular intervals that progressively shorten, increase in duration and intensity, radiate from back to abdomen, cause cervical change, and persist despite rest or warm baths.

False Labor

Irregular uterine contractions with non-progressive intervals, localized abdominal discomfort, absence of cervical dilation or effacement, and relief upon resting or taking a warm bath.

First Stage of Labor

The labor stage spanning from regular contraction onset to complete cervical dilation ($10\text{ cm}$), divided into the latent phase ($0\text{ to }5\text{ cm}$) and active phase ($6\text{ to }10\text{ cm}$).

Second Stage of Labor

The stage of labor extending from complete cervical dilation ($10\text{ cm}$) and effacement ($100\%$) to the complete delivery of the infant.

Third Stage of Labor

The period following the birth of the baby until the expulsion of the placenta, typically completed in under $30\text{ minutes}$.

Fourth Stage of Labor

The maternal physiologic recovery stage extending from placental delivery up to $4\text{ hours}$ postpartum.

Kangaroo Care

Skin-to-skin contact between mother and newborn directly following delivery to enhance emotional bonding and stimulate maternal lactation.

Uterine Contraction Waveform

The graphical representation of a contraction showing the increment (building), acme (peak), decrement (relaxation), resting tone, frequency, duration, and intensity.

Acme

The peak or highest point of intensity and pressure during a uterine contraction.

First Leopold Maneuver

Palpation of the uterine fundus using both hands to identify the fetal pole occupying the fundus (determining fetal presentation).

Third Leopold Maneuver

Palpation of the lower uterine segment directly above the symphysis pubis with the thumb and fingers of one hand to assess the presenting part and determine engagement.

Fourth Leopold Maneuver

Palpation toward the maternal pelvis while facing the patient's feet to determine the cephalic prominence, fetal attitude, and degree of head flexion.

Baseline Fetal Heart Rate

The mean fetal heart rate observed across a minimum $10\text{-minute}$ window, normally falling between $110\text{ and }160\text{ bpm}$.

FHR Decelerations

Visual decreases in fetal heart rate classified by timing and etiology: early decelerations (head compression), late decelerations (uteroplacental insufficiency), and variable decelerations (umbilical cord compression).

VEAL CHOP

A standard nursing mnemonic correlating FHR pattern changes to underlying etiologies: Variable = Cord compression, Early = Head compression, Acceleration = Okay (oxygenated), Late = Placental insufficiency.

Prolonged Deceleration

A visually apparent decrease in fetal heart rate of $\ge 15\text{ bpm}$ below baseline lasting longer than $2\text{ minutes}$ but less than $10\text{ minutes}$.

Sinusoidal FHR Pattern

A smooth, undulating, saw-tooth baseline waveform with an amplitude of $5\text{ to }15\text{ bpm}$ that indicates severe fetal anemia or fetomaternal hemorrhage.

FHR Variability Levels

Classifications of baseline FHR amplitude fluctuations: Absent (undetectable amplitude), Minimal ($< 5\text{ BPM}$), Moderate ($6\text{ to }25\text{ BPM}$), and Marked ($> 25\text{ BPM}$).

Nitrazine Test

A diagnostic pH swab test to confirm rupture of membranes that turns blue if positive for alkaline amniotic fluid and remains yellow if negative.

Terbutaline

A beta-mimetic tocolytic medication administered to inhibit uterine contractions during acute non-reassuring fetal status.