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Zorluk: KolayLabor, Delivery, and Puerperium

A 24-year-old primigravid woman at 39 weeks gestation is in the second stage of labor. The fetus is in a vertex, occiput anterior presentation. As the fetal head navigates through the maternal bony pelvis, it undergoes a series of predictable, adaptive positional changes. Arrange the following cardinal movements of labor in the correct chronological order as they typically occur.

  1. 1Engagement
  2. 2Flexion
  3. 3Internal rotation
  4. 4Extension
  5. 5External rotation (restitution)

Cevap

The correct sequence of the cardinal movements of labor is Engagement, Flexion, Internal rotation, Extension, and External rotation.
The cardinal movements of labor describe the adaptations the fetal head must make to pass through the maternal pelvis. The correct chronological sequence is: Engagement (head enters pelvic inlet), Descent (continuous throughout), Flexion (head chin-to-chest to present smallest diameter), Internal rotation (sagittal suture aligns with anteroposterior pelvic diameter), Extension (head delivers under symphysis pubis), External rotation/restitution (head untwists to align with shoulders), and Expulsion (delivery of anterior and posterior shoulders).

Adım Adım Çözüm

1
Identify the clinical scenario
The patient is in the second stage of normal labor with an occiput anterior presentation.
Understanding the normal physiologic process of a vertex vaginal delivery is required to determine the sequence of movements.
2
Determine the initial pelvic entry
Engagement is the first movement, as the biparietal diameter enters the pelvic inlet.
The fetus must enter the true pelvis before further movements can occur.
3
Sequence the subsequent fetal head adaptations
Flexion occurs as the head meets pelvic resistance, followed by internal rotation to navigate the midpelvis.
These positional changes present the smallest cephalic diameter to the birth canal and align the head optimally.
4
Sequence the delivery and realignment movements
Extension allows the head to be delivered under the pubic symphysis, followed by external rotation (restitution) to align with the shoulders.
This completes the mechanism of delivery for the fetal head and prepares the shoulders for expulsion.

Anahtar Kavram

Normal physiologic adaptations of the fetal head during vaginal delivery (cardinal movements of labor).
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Konular

Labor, Delivery, and Puerperium

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