OB EXAM #2: LABOR & DELIVERY

Gestation: Refers to the number of weeks of pregnancy since the first day of the last menstrual period.
Stillborn: A baby that is born after twenty weeks of gestation without a heartbeat; the term means "expired" or "has died."
Abortion: Encompasses a range of terms in healthcare, and includes both spontaneous abortions (miscarriages) and elective abortions.
- Note: The medical community often prefers the term "spontaneous abortion" when referring to miscarriages.

Gravida (G): Any pregnancy regardless of its duration.
Para (P): Refers to a birth after twenty weeks, regardless of whether the baby is born alive or deceased.
Abortus (AB): Indicates the number of pregnancies that ended before twenty weeks, typically recognized as miscarriages.

The speaker describes their own obstetric history using the terms G, P, and A:
- G (Gravida): 4 (four pregnancies total)
- P (Para): 3 (three living children)
- A (Abortus): 1 (one miscarriage at approximately twelve weeks of gestation)

Nulla Gravida: A woman who has never been pregnant.
Prima Gravida: A woman who is pregnant for the first time.
Multi Gravida: A woman who is pregnant for the second time or more.
Nulla Para: A woman who has no births at more than twenty weeks.
Prima Para: A woman who has one birth at more than twenty weeks.
Multi Para: A woman who has had two or more births at more than twenty weeks.

Key Assessment Points: During a vaginal examination, healthcare providers look for:
- Cervical dilation (measured in centimeters from 0 to 10)
- Effacement: The thinning of the cervix, described as feeling like tissue paper when 100% effaced.
- Fetal position: The aim is for the baby to be in a vertex (head-down) position.
Cervical dilation stages:
- Complete dilation: 10 centimeters, indicates readiness to push during delivery.

Upon admission for labor and delivery, several vital signs and examinations must be completed:
- Vital signs: Heart rate, blood pressure, temperature, etc.
- Cervical dilation and effacement measurements.
- Status of membranes: Whether they are ruptured or intact. Amniotic fluid characteristics can indicate potential issues (e.g., infection if it is cloudy or foul-smelling, meconium presence if green).

Electronic Fetal Monitoring: Monitors baby's heart rate (normal range: 110-160 bpm) and uterine contractions. Can be done internally or externally.
- External Monitoring: Often uses belts with transducers placed on the mother's abdomen.
- Internal Monitoring: Involves placing a transducer onto the fetal scalp via slight cervical dilation.
Awareness of potential risks due to internal monitors, such as increased infection risk, is important.

Contractions: Their intensity can be categorized as mild, moderate, and strong based on how they feel against various body parts:
- Mild: Similar to the tip of the nose.
- Moderate: Similar to the chin.
- Strong: Similar to the forehead.

Early Phase: Contractions occur every 30-60 minutes; cervix dilates between 0 to 3 cm.
Active Phase: Contractions become stronger and more frequent, dilating the cervix from 4 to 7 cm.
Transition Phase: Extremely painful contractions occur as the cervix dilates from 8 to 10 cm.
Third Stage: Separation of the placenta from the uterine wall; may involve medication (Pitocin or oxytocin) to assist with this.

Pain management approaches include: medications, epidurals, or natural pain relief such as hot baths, back rubs, etc.
Epidurals: Common pain management intervention that numbs the lower body; complications may include hypotensive episodes.

GBS is a type of bacteria that may not affect mothers but can harm babies during labor. Testing typically occurs between 35-37 weeks of gestation.
If positive, the mother should receive IV antibiotics during labor. If unclear on the status prior to delivery, further blood cultures may be necessary post-delivery.
Common medications include Penicillin G unless allergic, in which case alternatives like Clindamycin are used.

Types of Anesthesia:
- Epidural and Spinal Anesthesia: Commonly used; contrasts involve levels of sensation and movement.
- Spinal: No movement, used often in controlled settings or emergency situations.
- General Anesthesia: Provides rapid sedation, typically used in emergency C-sections or significant maternal/fetal distress.
Considerations for Anesthesia:
- Assess maternal and fetal health before administering anesthesia. Monitor vital signs continuously.
- Maternal blood type and history of previous pregnancies are critical in assessing care needs.

Normal Variability: Expected in fetal heart rate; diminished variability may indicate fetal distress or placental insufficiency.
Deceleration Types:
- Early Deceleration: Linked to head compression, is typically benign and does not require intervention.
- Late Deceleration: Indicates potential placental insufficiency and may require immediate medical intervention.
- Variable Deceleration: Results from umbilical cord compression; may need to address maternal positioning to alleviate pressure.

Fetal bradycardia (heart rate <110 bpm) or significant deceleration requires:
- Immediate maternal repositioning, oxygen administration, and notification of physician; potential for emergency C-section evaluated.
Monitoring of uterine activity and fetal heart response is crucial to ensure timely intervention when complications arise.

Comprehensive evaluation and ongoing monitoring during labor and delivery are essential to manage patient needs and ensure optimal outcomes for both mother and baby.
Communication and understanding of terminologies, labor stages, and potential complications are crucial for healthcare providers and patients alike.
Regular review and practice of managing the labor process and responding to emergency situations are vital components of obstetric clinical training.