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Module 5 Labor and delivery, Study notes of Physiology

This module contains how they will deliver the baby

Typology: Study notes

2020/2021

Uploaded on 10/08/2021

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Module No. 5 Labor and Delivery
Learning Objectives
After successful completion of this module, the student should be able to
1. Explain the different theories of labor onset
2. Explain the steps in history taking of a woman in the first stage of a
normal labor.
3. Explain and demonstrate how to palpate the abdomen of a woman in
labor to assess the size, lie and presentation of the baby
4. Differentiate between normal and abnormal findings during the
assessment of a woman in labor.
5. Utilize the nursing process in the care of client during labor and
delivery
ENGAGEMENT
A client is in active labor. The nurse is monitoring the fetal heart rate and
notes that the heart rate is 180 beats/minute, lasting for longer than 10
minutes
Question: What should the nurse do?
Introduction
Labor will already have begun in almost all cases when you are called to a
woman’s home or when she arrives at your Health Post. One of the most
critical assessments you have to make in4Labor and Delivery Care4is at the
time when you first attend a labor. Rapid early assessment is required so
that you can decide on the care needed for the laboring mother, in case
immediate referral or emergency measures are required. If all is well, you
need to take the woman’s history in detail and conduct a physical
examination in order identify the stage of labor that she has reached, and
discover any information from her history that may affect the progress or
outcome of her labor.
I. Theory of labor
A. Oxytocin theory
B. Progesterone deprivation theory
C. Uterine stretch theory
D. Theory of aging placenta
II. Process of labor – Four P’s
A. Description
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Module No. 5 Labor and Delivery Learning Objectives After successful completion of this module, the student should be able to

  1. Explain the different theories of labor onset
  2. Explain the steps in history taking of a woman in the first stage of a normal labor.
  3. Explain and demonstrate how to palpate the abdomen of a woman in labor to assess the size, lie and presentation of the baby
  4. Differentiate between normal and abnormal findings during the assessment of a woman in labor.
  5. Utilize the nursing process in the care of client during labor and delivery ENGAGEMENT A client is in active labor. The nurse is monitoring the fetal heart rate and notes that the heart rate is 180 beats/minute, lasting for longer than 10 minutes Question: What should the nurse do? Introduction Labor will already have begun in almost all cases when you are called to a woman’s home or when she arrives at your Health Post. One of the most critical assessments you have to make in Labor and Delivery Care is at the time when you first attend a labor. Rapid early assessment is required so that you can decide on the care needed for the laboring mother, in case immediate referral or emergency measures are required. If all is well, you need to take the woman’s history in detail and conduct a physical examination in order identify the stage of labor that she has reached, and discover any information from her history that may affect the progress or outcome of her labor. I. Theory of labor A. Oxytocin theory B. Progesterone deprivation theory C. Uterine stretch theory D. Theory of aging placenta II. Process of labor – Four P’s A. Description
  1. Labor is coordinated sequence of involuntary, intermittent uterine contractions
  2. Delivery is the actual events of birth B. Powers: uterine contractions
  3. Forces acting to expel the fetus
  4. Effacement - shortening and thinning of the cervix during the first stage of labor
  5. Dilation – enlargement of cervical os and cervical canal during the first stage
  6. Pushing efforts of the mother during the second stage C. Passageway
  7. The mother’s rigid bony pelvis and the soft tissues of the cervix, pelvic floor, vagina, and introitus D. Passenger
  8. The fetus, membrane and the placenta E. Psyche
  9. A woman’s emotional structure that can determine her entire response to labor and influence physiological and psychological functioning of the mother; the mother may experience anxiety or fear. F. Attitude
  10. Is the relationship of the fetal body parts to one another
  11. Normal intrauterine attitude is flexion, in which the fetal back is rounded, the head is forward on the chest, and the arms and legs are folded in against the body. G. Lie
  12. Relationship of the spine of the fetus to the spine of the mother
  13. Longitudinal or vertical lie a. Fetal spine is parallel in the mother’s spine b. Fetus is in cephalic or breech presentation
  14. Transverse or horizontal lie a. Fetal spine is at the right angle, or perpendicular, to the mother’s spine b. Presenting part is the shoulder c. Delivery by cesarean section is necessary H. Presentation
  15. Portion of the fetus that enters the pelvic inlet first
  16. Cephalic: Head first a. Is the most common presentation b. Has 4 variations  Vertex  Brow  Military  Face

I. Presenting parts – the specific fetal structure lying nearest to the cervix J. Position – relationship f assigned area of the presenting part or landmark to the maternal pelvis K. Station

  1. The measurement of the progress of descent in cm. above or below the midplane from the presenting part to the ischial spine
  2. Station 0 – at the ischial spine
  3. Minus station – above the ischial spine
  4. Plus station – below the ischial spine
  5. Engagement – when the widest diameter of the presenting part has passed the inlet; correspond to a 0 station INTERACTIVE LINK https://www.youtube.com/watch?v=37KQoVpHc0U

III. Mechanisms of labor Mechanism of labor  The exact events leading up to the onset of labor are still not fully understood.  For the baby to arrive, two things must happen: the muscles in the womb and abdominal wall have to contract and the cervix needs to soften, or ripen, allowing passage of the baby from the womb to the outside world.  This is brought about by specific movements and hormones.  The movements during labor, also known as the cardinal movements, involve changes in the position of the fetus’s head during its passage in labor.  These are described in relation to a vertex presentation. INTERACTIVE LINK https://www.youtube.com/watch?v=2kM35XMMiPk

 Although labor and delivery occur in a continuous fashion, the cardinal movements are described as the following 7 discrete sequences:

  1. Engagement
  2. Descent
  3. Flexion
  4. Internal rotation
  5. Extension
  6. Restitution and external rotation
  7. Expulsion A. Assessment 1. Lightening or dropping is also known as engagement and occurs when the fetus descends into the pelvis about 2 weeks before delivery; lightening or dropping is most noticeable in first pregnancies 2. Braxton Hicks contractions increase 3. The vaginal mucosa is congested and vaginal discharge increases 4. Brownish or blood-tinged cervical mucus is passed 5. Cervix ripens, becomes soft and partially effaced and may begin to dilate 6. The mother has sudden burst of energy also known as “nesting” often 24 to 48 hours before onset of labor 7. Weight loss of 1 to 3 lbs. results from fluid shifts produced by the changes in progesterone and estrogen levels 24 to 48 hours before the onset of labor 8. Spontaneous rupture of membranes occurs B. True labor VS False labor https://www.youtube.com/watch?v=uey4eOb35yY

IV. Leopold’s Maneuver A. Description

  1. Methods of palpation to determine presentation and position of the fetus and aid in location of fetal heart sounds
  2. If the head is in the fundus, a hard, round, movable object is felt. The buttocks feel soft and have an irregular shape and are more difficult to move
  3. The fetus’s back, which is smooth, hard surface, should be felt on one side of the abdomen
  4. Irregular knobs and lumps which may be the hands, feet, elbows, and knees are felt on the opposite side of the abdomen INTERACTIVE LINKS https://www.youtube.com/watch?v=ImtM_DNtJ https://www.youtube.com/watch?v=6y7XKFiBpfo V. Breathing techniques A. Provide a focus during contractions, interfering with pain sensory transmission B. Promote relaxation and oxygenation C. Begin with simple breathing pattern and progress to more complex ones as needed VI. Fetal monitoring A. Description
  5. Fetal monitor displays the fetal heart rate
  6. Monitor the uterine activity
  7. Assesses the frequency, duration and intensity of contraction

c. Encourage maintenance of effective breathing d. Provide a quiet environment e. Promote comfort with back rubs, sacral pressure, pillow support, and position changes f. Instruct partner in effleurage (light stroking of abdomen) g. Offer fluids and ice chips and ointment for dry lips h. Encourage voiding every 1 to 2 hours

  1. Transition phase a. Cervical dilation is 8 to 10 cm

b. Uterine contractions occur every 2 to 3 minutes, are 45 to 90 seconds in duration, and are stronger in intensity c. Encourage rest between contractions d. Provide privacy e. Offer ice chips for dry lips f. Encourage voiding every 1 to 2 hours D. Interventions throughout stage I

  1. Monitor maternal vital signs
  2. Monitor FHR via ultrasound doppler or electronic fetal monitor
  3. Assess FHR before, during, and after a contraction, noting that a normal FHR is 110 to 160 beats/minute
  4. Monitor uterine contractions by palpation determining frequency, duration and intensity
  5. Assess status of cervical dilation and effacement
  6. Assess fetal position, station and presentation by Leopold’s maneuvers
  7. Assist for pelvic examination and prepare for fern test E. Use of partograph
  8. Tool for monitoring progress of labor
  9. Purpose a. To detect abnormal progress of labor as early as possible b. To prevent prolonged labor

 A tool for monitoring the

progress of labor

 - Guides birth attendant

to identify women whose

labor is delayed and

therefore decide

appropriate action

NURSNG ALERT! If membranes have ruptured, assess the FH because of the risk of collapsed umbilical cord and assess the color of amniotic fluid because meconium stained fluid can indicate fetal distress C. Stage II. From complete cervical dilation to the expulsion of the fetus

  1. Assessment a. Cervical dilation is complete b. Progress of labor is measured by descent of fetal head through the birth canal c. Uterine contractions occur every 2 to 3 minutes, lasting 60 to 75 seconds, and are of strong intensity d. Increase in bloody show occur e. Mother feels urge to bear down; assist in pushing efforts
  2. Intervention a. Perform assessment every 5 minutes b. Monitor maternal vital signs c. Provide mother with encouragement and praise and provide for rest between contractions d. Assist mother into position that promotes comfort and facilitates pushing efforts such s lithotomy, semi sitting, kneeling, side lying or squatting e. Monitor for signs of approaching birth, such as perineal bulging or visualization of fetal head f. Prepare for birth

B. Stage III. From the delivery of the fetus to the delivery of placenta

  1. Assessment a. Contractions occur until the placenta is expelled b. Placental separation and expulsion occur c. Signs of placental separation  C alkin’s sign Uterus rises above the umbilicus)  S udden gush of blood  U terus becomes round or globular  L engthening of the cord d. Expulsion of the placenta occurs 5 to 30 minutes after the birth of the infant e. Types of placenta separation  Schultze mechanism – center portion of the placenta separates first, and its shiny fetal surface emerges from the vagina  Duncan mechanism – margin of placenta separates and the dull, red, rough maternal surface emerges from the vagina first
  2. Interventions a. Assess maternal vital signs b. Assess uterine status c. After expulsion of the placenta, uterine fundus remains firm and is located 2 finger breadths below the umbilicus d. Examine placenta for completeness (cotyledons and membranes) e. Assess mother for shivering and provide warmth f. Promote maternal-neonatal attachment C. Stage IV1 to 4 hours after delivery (Period of vigilance)
  3. Assessment a. Blood pressure returns to pre labor levels b. Pulse is slightly lower than during labor c. Fundus remains contracted, in the middle, 1 or 2 fingerbreadths below the umbilicus NURSNG ALERT! Monitor lochia discharge. Lochia may be moderate in amount and red in color in stage 4
  4. Interventions a. Perform maternal assessment every 15 minutes to 1 hour, every 30 minutes for 1 hour, and hourly for 2 hours b. Provide warm blanket c. Apply ice packs to the perineum

The doctor gave her a pudendal block and did a midline episiotomy. At 8: p.m. Mrs. Bakidan gave birth to a 7 lbs., 5 oz. (3.317 gm.) boy in the L.O.A. position. The nurse put medicine in the baby's eyes and placed an identifying bracelet on his right wrist and ankle. A matching bracelet was placed on the mother's wrist. The baby was shown to her mother and then taken to the newborn nursery. At 8:08 p.m. the placenta was expelled.

  1. What is pudendal block? What is the purpose? When do we do pudendal block? What are the other types of anesthesia given during labor? What are your nursing interventions?
  2. What is the purpose of episiotomy? When it is done? What are the types of episiotomy?
  3. Why is the medicine put in the baby's eyes?
  4. Why is it important to put identification on the baby in the delivery room?
  5. What care should Mrs. Bakidan receives before she is transferred to the recovery room. EVALUATION
  6. Your laboring patient has transitioned to stage 2 of labor. What changes in the perineum indicate the birth of the baby is imminent? a. Increase in meconium-stained fluid and retracting perineum b. Retracting perineum and anus with an increase of bloody show c. Rapid and intense contractions d. Bulging perineum and rectum with an increase in bloody show
  7. The mother has delivered the placenta. You note that the shiny surface of the placenta was delivered first. What delivery mechanism is this known as and surface of the placenta? a. Duncan mechanism, maternal b. Schultze mechanism, maternal c. Duncan mechanism, fetal d. Schulze mechanism, fetal
  8. After birth, where do you expect to assess fundal height? a. At the xiphoid process b. 5 cm below the umbilicus c. 2 cm above the pubic symphysis d. At or near the umbilicus
  9. During stage 3 of labor, you note a gush of blood and that the uterus changes shape from an oval shape to globular shape. This indicates a. Post-partum hemorrhage b. Imminent delivery of the fetus c. Placenta has separated d. A and B
  1. When evaluating a client’s knowledge of symptoms to report during her pregnancy, which statement would indicate to the nurse in charge that the client understands the information given to her? a. I’ll report increased frequency of urination b. If I have blurred or double vision, I should call the clinic immediately c. I feel tired after resting, I should report it immediately d. Nausea and vomiting should be reported immediately
  2. The nurse is caring for a client in labor. Which assessment finding indicates to the nurse that the client is beginning the second stage of labor? a. The contractions are regular. b. The membranes have rupture c. The cervix is completely dilated d. The client starts to expel clear vaginal fluid
  3. The client is found to be at +4 station. Which action is most appropriate for the nurse to take? a. Prepare for delivery b. Chart the finding c. Administer pain medication d. Increase the Pitocin (oxytocin)
  4. What is the correct order of the cardinal movements? a. Engagement, internal rotation, extension, external rotation, expulsion b. Engagement, extension, internal rotation, external rotation, expulsion c. Internal rotation, engagement, extension, expulsion, external rotation d. Engagement, internal rotation, extension, expulsion, external rotation
  5. When assessing a woman in labor, the nurse is aware that the relationship of the fetal body parts to one another is called fetal: a. Lie b. Position c. Presentation d. Attitude
  6. Which position would the nurse suggest for second-stage labor if the pelvic outlet needs to be increased? a. Sitting b. Squatting c. Side-lying d. Semi-recumbent