labor (1)

Passenger: Refers to the fetus and its characteristics affecting labor.
Power: Encompasses the contractions of the uterus that facilitate the birth process.
Passageway: The birth canal through which the fetus travels.
Position: The mother's position during labor which can influence the birthing process.
Psychological Response: The emotional and psychological state of the mother that can impact labor outcomes.

Philosophy: Emphasizes a low-tech and high-touch approach to childbirth, advocating for minimal interventions unless necessary.
Partners: Importance of caregivers and supportive partners aiding in the birthing process.
Patience: Recognizes the need for natural timing and allowing labor to progress at its own pace.
Patient Preparation: Involves childbirth education for the client to empower them with knowledge.
Pain Management: Discusses comfort measures to support the mother during labor.

Definition: The relationship of the longitudinal axis of the fetus to that of the mother.
- Longitudinal Lie: The fetus is aligned with the mother’s long axis, ideal for vaginal birth.
- Transverse Lie: The fetus is positioned horizontally, indicating possible complications.
Consideration: Understanding the intended fetal lie is critical for anticipating the labor process.

A nurse palpates a woman's abdomen in labor.
  - Firm, round mass felt 8 inches left of the umbilicus indicates fetal lie.
  - Probable conclusions:
    - Longitudinal: If the mass is the presenting part.
    - Transverse: If not aligned.

Definition: The relationship of the presenting part of the fetus to the ischial spines of the mother’s pelvis.
  - Engagement: When the presenting part reaches Station 0 or lower.
  - Minus Stations: Indicate positions above the ischial spines.
  - Positive Stations: Indicate positions below the ischial spines.

Floating: The fetal presenting part is not engaged.
Ballotable: The presenting part moves when pushed.
Engaged: The presenting part is at or below the level of the ischial spines.

Definition: The part of the fetus that presents first in the birth canal.
  - Vertex Presentation: Most common (95%) where the head is the presenting part.
  - Breech Presentation: (4%) where the buttocks or feet present first.
  - Other Presentations: Such as brow, face, shoulder (1%).

Prolapsed Cord: When the umbilical cord slips ahead of the presenting part.
CPD (Cephalopelvic Disproportion): When the head is too large to fit through the pelvis.
Asphyxia: Possible oxygen deprivation for the fetus.
Cesarean Section (C/S): Increased likelihood of needing surgical intervention.
- Danger: Breech presentations carry significant risks for both mother and child.

Definition: A fetal emergency where the umbilical cord accompanies the presenting part into the birth canal.
Sign: While it cannot be visually seen, it may be palpated as a mass during a vaginal examination.

Scenario: Patient’s membranes ruptured with the vertex at -3 station.
  - Question: Can the patient ambulate?
    - A. True / B. False
    - Explanation Required: Assess the implications of fetus positioning and membrane status on safety.

Definition: A procedure to turn a fetus from a breech or transverse position to a cephalic presentation by external manipulation through the abdomen.
Candidates:
  - Gestational age 36-38 weeks, typically performed at 37 weeks.
  - Must have a reactive non-stress test indicating fetal well-being.
  - Usually indicated for breech presentations.
Contraindications:
  - Vaginal bleeding.
  - Ruptured membranes.
  - Oligohydramnios (low amniotic fluid).
  - Previous cesarean section or any uterine scar.
  - Presence of twins.
  - Placenta previa (low-lying placenta).

Prior to Procedure:
  - Ensure NPO (nothing by mouth).
  - Perform a nonstress test.
  - Establish IV access for medications.
  - Administer tocolytic medication to relax the uterus.
  - Confirm epidural availability if desired by the patient.
  - Ensure the operating room is prepared.
During Procedure:
- Continuous fetal heart rate monitoring is required.
- Intermittent ultrasound to verify fetal position.
After Procedure:
- Continuous monitoring of fetal condition and uterine activity for several hours.
- Evaluate for any pain or bleeding.

Considerations:
  - Increased risks include:
    - Preterm labor and birth.
    - Higher likelihood of cesarean delivery.
    - Increased risk of postpartum hemorrhage.

Definition: Describes the relationship of a landmark on the baby to the mother’s pelvis.
- Key landmarks are the Occiput/vertex for head presentations and Sacrum/breech for breech presentations.
Example: LOA (Left occiput anterior) indicates the occiput is facing the left front quadrant of the mother's pelvis.

Definition: Refers to the necessary movements of the fetus through the birth canal during labor.
  - Critical movements include:
    - Engagement/descent: The initial movement of the presenting part into the pelvis.
    - Flexion: The fetal chin moves closer to the chest.
    - Internal rotation: The fetus rotates into the best position for delivery.
    - Extension: The fetal head exits the birth canal.
    - External rotation/restitution: The head rotates back to its original position post-delivery.

Anterior Fontanelle: An important landmark for fetal positioning.
Posterior Fontanelle: Another key landmark.
Dimensional Measurements:
  - Supraoccipito-mental diameter: $13.5 ext{ cm}$
  - Submentobregmatic diameter: $9.5 ext{ cm}$
  - Occipito-frontal diameter: $11 ext{ cm}$
  - Suboccipito-bregmatic diameter: $9.5 ext{ cm}$