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Obstetrical Procedures | 마이메르시 MyMerci
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Obstetrical Procedures

NCLEX Review Guide: Maternal Newborn Health - Labor and Birth Obstetrical Procedures

Labor and Birth Process

Stages of Labor

  • First Stage: Onset of labor to complete cervical dilation (10cm), divided into latent (0-3cm), active (4-7cm), and transition (8-10cm) phases
  • Second Stage: Complete dilation to delivery of baby, characterized by maternal urge to push and crowning
  • Third Stage: Delivery of placenta, typically occurs within 30 minutes of birth with signs of separation
  • Fourth Stage: First 1-4 hours postpartum, critical period for monitoring maternal vital signs and uterine contraction

Memory Aid: "CLAP"

C - Cervical changes, L - Labor contractions, A - Active pushing, P - Placental delivery

Key Points

  • Monitor fetal heart rate continuously during active labor
  • Assess cervical dilation, effacement, and fetal station regularly
  • Encourage position changes and ambulation during early labor

Common Obstetrical Procedures

Cesarean Section

  • Surgical delivery through abdominal and uterine incisions, indicated for maternal or fetal complications
  • Preoperative preparation includes NPO status, IV access, Foley catheter insertion, and informed consent
  • Postoperative care focuses on incision assessment, pain management, early ambulation, and bonding facilitation
ALERT: Monitor for signs of infection, hemorrhage, and thromboembolism post-cesarean

Episiotomy

  • Surgical incision of the perineum to enlarge vaginal opening during delivery
  • Types include midline (median) and mediolateral incisions with different healing characteristics
  • Postpartum care includes ice application, sitz baths, and pain management strategies
  1. Assess perineal area for healing and signs of infection
  2. Teach proper perineal hygiene techniques
  3. Provide comfort measures and pain relief options
  4. Monitor for complications such as hematoma or dehiscence

Labor Induction and Augmentation

Oxytocin Administration

  • Oxytocin is administered IV to induce or augment labor contractions with careful monitoring protocols
  • Start at lowest dose (0.5-1 mU/min) and increase gradually every 30-60 minutes based on uterine response
  • Continuous fetal monitoring is essential to assess for uterine hyperstimulation and fetal distress

Clinical Scenario

Patient receiving oxytocin shows contractions every 2 minutes lasting 90 seconds. STOP oxytocin immediately - this indicates uterine hyperstimulation.

Cervical Ripening

  • Prostaglandins (misoprostol, dinoprostone) are used to soften and dilate the cervix before induction
  • Bishop score assessment determines cervical readiness with scores ≥6 indicating favorable conditions

Oxytocin vs Prostaglandins

AspectOxytocinProstaglandins
PurposeUterine contractionsCervical ripening
RouteIV continuousVaginal/oral
MonitoringContinuous FHRIntermittent FHR

Fetal Monitoring

Electronic Fetal Monitoring (EFM)

  • Baseline FHR normal range is 110-160 bpm with moderate variability indicating fetal well-being
  • Accelerations are reassuring signs while decelerations require immediate assessment and intervention
  • Late decelerations indicate uteroplacental insufficiency and require immediate physician notification

Memory Aid: "VEAL CHOP"

V-Variable decelerations, E-Early decelerations, A-Accelerations, L-Late decelerations
C-Cord compression, H-Head compression, O-OK/normal, P-Placental insufficiency

Key Points

  • Category I tracings are normal and reassuring
  • Category II tracings are indeterminate and require close monitoring
  • Category III tracings are abnormal and require immediate intervention

Commonly Confused Concepts

Station vs Engagement vs Presentation

TermDefinitionAssessment
StationFetal head position relative to ischial spines-3 to +3 scale
EngagementFetal head enters pelvic inletStation 0 or below
PresentationFetal part entering pelvis firstVertex, breech, shoulder
Common Pitfall: Don't confuse effacement (cervical thinning) with dilation (cervical opening)

Study Tips and Quick Checks

Quick Check: Normal Labor Values

  • □ Cervical dilation: 1.2 cm/hr (nullipara), 1.5 cm/hr (multipara)
  • □ Fetal descent: 1 cm/hr (nullipara), 2 cm/hr (multipara)
  • □ Contraction frequency: Every 2-3 minutes in active labor
  • □ Contraction duration: 45-90 seconds

Self-Assessment Checklist

  • □ Can I identify the four stages of labor and their characteristics?
  • □ Do I understand indications and contraindications for cesarean section?
  • □ Can I interpret fetal heart rate patterns and appropriate interventions?
  • □ Do I know the proper administration and monitoring of oxytocin?
  • □ Can I differentiate between types of fetal presentations and positions?

Remember: You've got this! Focus on safety, assessment, and communication. Trust your nursing knowledge and critical thinking skills. Every question you answer correctly brings you closer to becoming a registered nurse!

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