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EMS OBGYN OVERVIEWLYSTRA WILSON-CELESTINE, FACOGMay 21th 2015
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OBJECTIVES
Review female anatomy and reproductive system
Normal pregnancy, labor and delivery
Assessing a pregnant patient
Common complications and emergencies of pregnancy
Newborn care
Review of case scenarios
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Definition of Terms
Gravity: # of pregnancies
Parity: # of pregnancies >20wk
Nulliparous: never pregnant
Primagravid: first pregnancy
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Definition of Terms
Presentation: leading part in birth canal-crown, rump, face, arm.
Term : 37 to 42wks.
Preterm : <37wks
Post term:>42wks
Abortus: Fetus /embryo delivered <20wk/500gm
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External Genitalia
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Pelvic Anatomy
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Reproductive Organs
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Physiology of Pregnancy
Genital Tract Vagina, perineum:
Increased vascularity, hyperemia, edema Increased secretions (thick white discharge) Acidic pH( 3.5-6) Increased vaginal wall length Chadwick’s sign- violet color of vagina/vulva
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Normal cervix
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Chadwick’s sign and leucorrhea
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Chadwick sign- pregnant
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Physiology of PregnancyUterus
500-1000 fold increase in size
Wt. at term +/- 1100gm
Out of pelvis by end of 12th wk.
Dextrorotated
Blood flow increases from 100 to 650ml/min
Limited auto regulation
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Physiology of PregnancyUterus
Limited Auto regulation Maximum uterine vessel dilation leave little auto regulation
to improve flow during perfusion pressure changes Decreased maternal cardiac output blood flow shift away
from placenta to maternal brain, kidney and heart.
Uterine Hypertrophy Venous compression fall in venous return, fall in cardiac
output Compensation: Supine hypotension syndrome, nausea,
dizziness, syncope, relief by position change
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Physiology of PregnancyCervix
Thickened mucus
Chadwick sign
Eversion of columnar cervical glands
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Physiology of PregnancyOvaries
Suspended follicular maturation
Enlarged ovarian veins
Single corpus luteum Functional 4-5wks post ovulation Produces progesterone, relaxin
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Physiology of PregnancySkin
Vascular Spider angiomas Palmar erythema- also seen thyroid disease,
lung CA or inherited
Striae gravidarum Genetic disposition
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Palmar erythema
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Spider Angioma
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Striae gravidarum
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Physiology of PregnancySkin
Increased pigmentations due to estrogen, progesterone, melanocytes simulating hormones Linea negra Chloasma/Melasma gravidarum
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Linear Negra
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Molasma Gravidarum
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Physiology of PregnancyBreast
Tender/tingling sensation in early preg
Nipple enlarges, broader areolae with increased pigmentation
Increase size from ductal growth and alveolar hyperplasia
Colostrum production
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Physiology of PregnancyMusculoskeletal
Lumbra lordosis low back pain
Relaxation of pubic symphysis and sacroiliac joints
Relaxed muscles leading to hernia and easily strained muscles
All compounded by weight gain.
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Lordosis of pregnancy
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Physiology of PregnancyHematologic
50% increases in blood volumePlasma volume increases 50-70%; starts at
6wksRBC mass increase 20-35%: starts at 12wk
Physiologic anemiaHemodilutionalAnemia nadirs at 30-34wks
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Physiology of PregnancyHematology
Iron Deficiency Anemia Increased iron requirements, supplements
recommended term Hgb <10mg/dL due to deficiency rather
than hemodilution
Immune changes WBC increases to 6000-16000 in 3rd TM Plt decrease slightly
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Physiology of PregnancyHematology
Coagulation Fibrinogen increases 50% Changes in clotting factors and regulatory
protein
Cardiac output Begins to increase by 5th wk Peaks at 20-24wks Rises by 40% by 20-24wks Overall 50% increase
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Physiology of PregnancyHematology
Initially increase in heart rate
Reduced systemic vascular resistance
CXR: displaced heart to left upward and pericardial effusion
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Physiology of PregnancyTest Interpretation
BP: SBP increases by 5-10mmHg; DBP by 10-15mmHg (before 24wks). Each contraction pushes 300-500ml from
uterus to circulation Rise in arterial BP 10mmHg during Ctx.
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Physiology of PregnancyRespiratory
Estrogen hyperemic, edematous nasopharynx and increased mucous secretions. Symptoms: stuffiness, epistaxis, chronic cold.
chest circum. and transverse diameter; Diaphragm pushed up 4cm Changes in lung volumes and pulmonary function test.
Oxygen consumption increases 15-20%
BOTTOM LINE
State of hyperventilation with chronic respiratory alkalosis
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Physiology of PregnancyUrinary
• Mechanical Ureteric obstruction from uterus Incomplete bladder empting Vesicoureteral reflux
• Physiology 75% renal blood flow with increase in GFR 50% Multiple trips to bathroom Glucosuria, Proteinuria
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Physiology of PregnancyGastrointestinal
Increased appetite (300kcal/d)
Ptyalism (1-2L/d) spitting
Gingivitis
Lower tone of Gastroesophageal sphincterreflux
Delay gastric emptying (60% of meal emptied in 90mins for non-pregnant; doubled time for pregnant)
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Physiology of PregnancyGastrointestinal
Increased small bowel transit time 58 vs 52hrs
Stomach and intestinal displacement appendix at right flank
Constipation/Hemorrhoids
Gallbladder changes increased risk of stones
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Normal Pregnancy Events
1st Trimester (LMP to 13wks) Nausea/Vomiting, fatigue, Food aversion or
cravings, spotting, breast tenderness, increased sex drive
Gain about 5-8lbs Complications- Miscarriage, Ectopic, blighted
ovum
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Normal Pregnancy Events
• 2nd Trimester (13-26wks) Feeling of well being, less fatigue. Round ligament pain, bladder pressure, round
ligament pain, Braxton hicks Complications- fetal loss is minimal but can seen
with labor, incompetent cervix, intrauterine death.
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Normal Pregnancy Events
• 3rd Trimester (26wks to delivery) Feeling uncomfortable; pelvic/back pain and
pressure Lower extremities swelling, varicosities,
engagement, contractions,. Wt gain 1lbs/wk Complications: Rupture membranes, preterm
labor, pregnancy induced hypertension, Urinary tract infection, Gestational diabetes
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Complications of Pregnancy
Vaginal bleeding
Spontaneous Miscarriage
Ectopic Pregnancy
Premature rupture of membranes with cord prolapse
Pre eclampsia/Eclampsia
Placental Previa
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Complications of Pregnancy
Medical/surgical eg diabetes, ruptured appendix
Abruptio Placenta
Breech presentation and delivery
Meconium Stained fluid
Abnormal labor pattern
Stressed Newborn
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Labor
Clinical diagnosis
Onset of regular rhythmic contractions
Progressive cervical dilation and effacement
3 stages
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Stages of Labor
Stage 1 Interval between labor onset and full cervical
dilation Latent phase- period btw labor onset to start of
rapid change of cervical dilation Active phase- period from 6cm to 10cm
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Stages of Labor
Stage 2 Interval btw full dilation (10cm) to delivery of
infant Nulliparous- push for max of 2hr without regional
anesthesia(3hr with) Multiparous- push for max 1hr without anesthesia
(2hr with)
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Stages of Labor
Stage 3 Refers to delivery of placenta and fetal
membranes Make take up to 30mins What are the active interventions if >30mins?
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Cardinal Movementof Labor
Engagement- passage to widest diameter of presenting part below plan of pelvic inlet
Descent- downward passage of presenting part through pelvis
Flexion- passive flexion of head on to chest
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Cardinal Movements of Labor
Internal Rotation- vertex moves from transverse to anteroposterior position
Extension – fetus head is at level of introitus; base of occiput is at inferior margin of pubic symphysis
External Rotation- or restitution- return of head to correct anatomical position- LOA or ROA
Explusion- delivery of rest of fetus
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Demonstration of Delivery Method.
https://www.youtube.com/watch?v=ZDP_ewMDxCo
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Field Obstetric Assessment
Determine if delivery is imminent
Remain calm
Ask few questions Closed ended Simple answers
Perform visual exam (with permission)
Evaluate vitals
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Obstetrics Assessment
Things you want to know Due date Number of pregnancies delivered in past Length of labor in past Is there vaginal bleeding or did she break her
water Is there a feelings to have a bowel movement
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Obstetrics Assessment
If delivery is imminent- What are the signs? Crowning or bulging She screams “I need to take a dump “or “its
coming” or “I have to push”
What to do! Remain calm, place patient supine in safe location. Disrobe undergarment – have pt/husband/ SO do it. Visual check of perineum- blood loss, fetal parts,
bag Abdominal palpation for contractions-duration,
interval
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Obstetrics AssessmentField Delivery
Anticipate exposure of large amount of blood and body fluids
Full personal protection is recommended
Don’t assume absence or presence of disease by appearance of patient or situation.
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Sterile OB Kit Content
Sterile exam gloves
Disposable scalpel
Maternity pad
Plastic lined under pad
Receiving blanket
Disposable towels
Gauze sponges
Disposable bulb syringe
Disposable plastic apron
Plastic bag to hold placenta
Twist ties
O.B. towelettes
Umbilical cord clamp
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Obstetrics AssessmentField Delivery
You are ready for a delivery!!!
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Crowning/Extension
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External Rotation
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External Rotation
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Delivery of Anterior Shoulder
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Delivery of Posterior Shoulder
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Double cord clamping and cutting
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Case Scenario #1
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Case Scenario #1
Post partum hemorrhage risk factors: Grand multiparous, rapid labor, prolonged
labor, augmented labor History of postpartum hemorrhage,
episiotomy, especially mediolateral, preeclampsia,
Overdistended uterus (macrosomia, twins, hydramnios), operative delivery, Asian or Hispanic ethnicity, chorioamnionitis
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Case Scenario #2
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Case Scenario #2
Cord Prolapse True emergency Need to release pressure of head against cord Sterile vaginal exam check for cord pulsation
and push up on vertex. Keep hand in vagina until OB team takes over. Emergency cesarean section with general
anesthesia is fastest way to deliver.
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Case Scenario #2
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Case Scenario #3
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Case Scenario #3
Abruptio Placenta Premature separation of normal placenta from
uterine wall secondary to decidual bleeding. 1/86 to 1/206 cases. Risks factors:
Hypertensive disease, Advanced maternal age and parity Drug use (eg smoking, cocaine) Trauma Uterine anomalies eg fibroids Sudden decompression eg ROM
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Placental Abruption
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Case Scenario #3
Abruptio Placenta Classic Signs: vaginal bleeding, abdominal pain,
uterine contractions and tenderness Abruption can be concealed with no evidence of
vaginal bleeding (10-20%) Size of hemorrhage predictive of fetal survival
>60ml associated with >50% fetal mortality.
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Case Scenario #4
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Case Scenario #4
Neonatal Resuscitation Assessing a Newborn- 3 questions!!
Is the baby term? Is the baby breathing or crying? Is the baby moving with good tone or is it flaccid?
If YES to all, then Clamp and cut cord 7-8 inches from insertion site Place baby with mom Provide warmth, dry baby’s skin Record APGAR
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Case Scenario #4
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Case Scenario #4
Neonatal Resuscitation If NO to any of the 3 questions, then
Provide warmth Clear airways if necessary Stimulate baby
Check HR: if <100- assist ventilation with bag valve mask
Check breathing: if labored or cyanotic- clear airway
Re evaluate HR and breathing after intervention
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Case Scenario #4
Neonatal Resuscitation If HR <60 start compression Revaluate HR and breathing. If no change
consider intubation (hopefully you are in the ER dept)
Establish access: umbilical vessels, IV, IO Medication use if condition deteriorates Consider possible narcotic use in mom- narcan
for reversal. Pneumothorax, anomalies, cardiac or
respiratory defects, blood sugar etc.
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Case Scenario #5
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Case Scenario #5
Ectopic pregnancy Implantation of fertilized ovum outside uterine
cavity 2% of all pregnancies in USA Most common cause of maternal mortality in 1st
trimester
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Case Scenario #5
Ectopic Pregnancy- Risk Factors Prior ectopic (15-5%) Tubal surgery (15-20%) Tubal pathology (90%) PID history (6-9%) Infertility (5%) Sterilization (33%)
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Case Scenario #5
Ectopic pregnancy Locations:
Tubal 96% Ovarian <1% Cervical<1% Abdominal 1.3%
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Case Scenario #5
Ectopic Pregnancy Signs
Abdominal tenderness 91% 1st TM bleeding 79% Tachycardia, low grade fever Cervical motion tenderness Tender pelvic or adnexal mass Chadwick sign Hypoactive bowel sound
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Case Scenario #5
Ectopic Pregnancy- Symptoms Onset about 6-7wks after LMP Pelvic pain Vaginal bleeding N/V/D and dizziness
Differential Diagnosis Appendicitis Threatened abortion Ruptured ovarian cyst
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Case Scenario #5
Ectopic pregnancy- Differential Diagnosis PID Endometritis Kidney stones Normal pregnancy UTI
Diagnosis Beta HCG levels Ultrasound
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Case Scenario #5
Ectopic Pregnancy Treatment
Expectant management Medical- Methotrexate( anti metabolite) Surgical
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Case Scenario #6
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Case Scenario #6
Preeclampsia- eclampsia Form of hypertensive pregnancy specific
disorder that occurs after 20wks Characterized by vasospasm, coagulation
system activation, hyperreflexia Multitude of Symptoms Categorized: mild vs. severe preeclampsia
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Case Scenario #6
Preeclampsia-eclampsia Mild pre eclampsia
BP >140/90 +1 urine dip protein or >300mg on 24hrs
Severe Preeclampsia BP >160/110 Proteinuria >5g or 3-4+ urine dip Cerebral and visual disturbance Epigastric pain Pulmonary Edema
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Case Scenario #6
Preeclampsia-eclampsia Eclampsia Elevated liver enzymes HELLP
Cause unknown; possible abnormal placentation or endothelial activation
Prevention – no proven therapy Low ASA Calcium Antioxidant eg Vit A
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Case Scenario #6
Preeclampsia-eclampsia Delivery is ONLY known treatment Vaginal delivery unless otherwise indicated Delivery based on gestational age and severity
of disease.
Treatment Eclamptic Seizure prophylaxis/treatment-
Magnesium sulfate IV Antihypertensive therapy SBP >160-180 DBP
>110
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Case Scenario #6
Preeclampsia-eclampsia
Treatment Monitor coagulation factors and LFTs Aggressive fluid management, risk of
pulmonary edema Monitor urine output
Postpartum Continue Mg SO4 for 24hrs BP control, 40% recurrence rate.