postpartum hemorrhage lecture notes
TRANSCRIPT
1
THE MEDICAL MANAGEMENT OF THE MEDICAL MANAGEMENT OF
POSTPARTUM HEMORRHAGEPOSTPARTUM HEMORRHAGE
Chukwuma I. Onyeije, M.D.,Chukwuma I. Onyeije, M.D.,
Atlanta Perinatal AssociatesAtlanta Perinatal Associates
2
•Provide a
definition of PPH
•Review the risk
factors for PPH
•Understand the
nature and
importance of
rapid diagnosis
and treatment
OBJECTIVES
3
For your convenience,A digital copy of this
lecture is also located at:
http://onyeije.net/present
4
Mary
24 year old G2P2
Underwent a routine cesarean section at 7.30 pm
Pre-operativeHb was 13 g/dl.
Blood loss of 500cc.
5
Mary
4 hours post-partum
Pulse at 100-120 otherwise stable.
BP: 70-90 / 50-60
Analgesia and Hydration provided.
5 hours postpartum: Seizure with obtundation.
Hemoglobin: 7 g/dl, 6
6 Hours post partum: Elevated cardiac enzymesDIC Myocardial Infarction & Liver failure
9 Hours postpartum: Failed arterial embolization
10 Hours postpartum Uterine packing done.
11 Hours Postpartum: Hysterectomy
2 Days Postpartum: Flatline EKG
7
‘‘‘‘She died in She died in
childbirth’’childbirth’’
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Hemorrhage has probably killed
more women than
any other complication
of pregnancy in the
history of mankind.
9
An estimated
150,000 maternal
deaths worldwide result from obstetric
hemorrhage each year
10
90% of deaths fromPostpartum
hemorrhage are preventable.
11
WE HAVE
THE
TOOLS
GOOD NEWS
12
Those caring for pregnant women must be
prepared to aggressively treat
this complication when it occurs.
13
What What
can be can be
done?done?
14
THE STEPS TO PPH:
POSTPARTUM HEMORRHAGE:
PREDICT
HANDLE
PREPARE
15
THE STEPS TO PPH:
POSTPARTUM HEMORRHAGE:
PREDICT HANDLEPREPARE
Identify patients at risk
Use a multi-
disciplinary Approach
Optimize clinical
management
17
Large am
ounts
of blood
can
be lost
rapidly
followin
g
delivery
.
18
Uterine co
ntraction
is more
important
than clot
formation
or platel
et aggreg
ation as
a mechanis
m of hemos
tasis
19
1. PREDICT:
THE STEPS TO PPH:
POSTPARTUM HEMORRHAGE:
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Can we Predict
PPH?
Who is
at risk?
21
Risk Factors for Postpartum
Hemorrhage What Should we do with a list like this?
Prior postpartum hemorrhage
Advanced maternal age
Multifetal gestations
Prolonged labor
Polyhydramnios
Instrumental delivery
Fetal demise
Placental abruption
Anticoagulation therapy
Multiparity
Fibroids
Prolonged use of oxytocin
Macrosomia
Cesarean delivery
Placenta previa and accreta
Chorioamnionitis
General anesthesia
22
Clinically Important Risk Factors for Postpartum
Hemorrhage
Prior postpartum hemorrhage
Abnormal placentation
Operative delivery
23
Risk Factors for Postpartum
Hemorrhage under Clinical
Control
Prolonged labor
Instrumental
delivery
Anticoagulation
therapy
Prolonged use of
oxytocin
Cesarean delivery
General anesthesia
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Causes of Postpartum Hemorrhage
(another busy slide)Primary causes
Uterine atony
Genital tract lacerations
Retained products
Abnormal placentation
Coagulopathies and anticoagulation
Uterine inversion
Amniotic fluid embolism
Secondary causes
Retained products
Uterine infection
Subinvolution
Anticoagulation
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80% OF CASES OF POSTPARTUM HEMORRHAGE
ARE DUE TO UTERINE ATONY
(a less busy slide)
26
What about DIC?
Coagulopathy is a relatively uncommon
cause of primary PPH
Coagulopathy most commonly occurs
when another cause of PPH already
has produced significant blood
loss.
27
RDFSRDFS is retained dead fetus syndrome
Well described in most obstetrics
texts
Clinically manifested at about 6
weeks after fetal death
Rarely seen in modern obstetrics.
28
Congenital coagulation
disorders
Uncommon individually
As a class are present more
frequently than commonly thought
Examples:
VonWillebrand’s disease
Specific factor deficiencies (factors II,
VII, VIII, IX, X, and XI)
29
80% OF CASES OF
POSTPARTUM HEMORRHAGE
ARE DUE TO UTERINE
ATONY
(Did I mention that…)
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Question: What causes
uterine atony and is there
anything we can do to prevent
uterine atony induced
postpartum hemorrhage?
31
•
Causes of Uterine Atony:
Overdistension of the uterus
Myometrial laxity as seen in:
Multiparity,
Prolonged labor,
Use of large quantities of oxytocin,
Tocolytic therapy,
General anesthesia.
32
Trends in postpartum hemorrhage: United States, 1994–2006
Source: American Journal of Obstetrics & Gynecology 2010; 202:353.e1-353.e6 (DOI:10.1016/j.ajog.2010.01.011 )
Copyright © 2010 Terms and Conditions
William M. Callaghan, MD, MPH, Elena V. Kuklina, MD, PhD and Cynthia J. Berg, MD, MPH
American Journal of Obstetrics & GynecologyVolume 202, Issue 4, Pages 353.e1-353.e6 (April 2010)
DOI: 10.1016/j.ajog.2010.01.011
33
Upper Genital Tract Trauma
Most often is the result of
uterine rupture
Bleeding from direct uterine injury during cesarean
Injury of associated vascular structures (uterine, artery or broad ligament varicosities) during cesarean
34
Lower Genital Tract Trauma
May occur spontaneously or result from episiotomy, obstetric maneuvers, or operative instrumented deliveries.
Involve perineum, cervix and vagina.
35
2. PREPARE:
THE STEPS TO PPH:
POSTPARTUM HEMORRHAGE:
36
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1.- Prepare for PPH
2.- Optimize patient’s hemodynamic status
3.- Timing of Delivery
4.- Surgical planning
5.- Anesthesia /I.V. access/ invasive monitoring
6.- Modify obsterical management
7.- Increased postpartum/postop surveillance
Patients
at risk
Pre-delivery
management
38
Preparation for Postpartum Hemorrhage
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“Perhaps the most important aspect in the management of PPH
is the attitude of the
attendant in charge. It is
critical to maintain equanimity
in what can be a chaotic and
stressful environment”.
Yinka Oyelese, MD, Obstet Gynecol Clin N Am 34
(2007) 421–441
40
Analysis Paralysis
An excessive number of well-meaning
individuals increases the ambient
noise, adds to confusion, and opens
the door to communication errors.
Yinka Oyelese, MD, Obstet Gynecol
Clin N Am 34 (2007) 421–441
41 42
1.- Prepare for PPH
-Nursing
-Anesthesia
- Surgical assistance
- Others (I.R.)
Drugs/Equipment
-Methergine
-Hemabate
-Cytotec
-Colloids
-Blood/Bl.products
-Surg. Instruments
-Hemostatic ballons
Personnel
43
Anesthesia / I.V. Access Obtain
Anesthesia consultation
•Type of anesthesia
•Need for invasive monitoring
• (A line, Swan-Ganz,
etc)
44
• Physicians underestimate blood loss by 50%
• Slow steady bleeding can be fatal
• Most deaths from hemorrhage seen after 5h
• Abdominal or pelvic bleeding can be hidden
Postpartum Hemorrhage is
Easy to miss
45
• Estimate blood loss accurately.
• Evaluate all bleeding, including slow bleeds.
• If mother develops hypotension, tachycardia or pain…rule out
intra-abdominal blood loss.
Always look for signs of bleeding
46
Identify possible post partum hemorrhage.
Simultaneous evaluation and treatment.
Remember ABCs.
Use O2 4L/min.
If bleeding does not readily resolve, call
for help.
Start two 16g or 18g IVs.
Initial Assessment
47
Initial Steps for PPHInitial Steps for PPH
Bimanual compression
Manual exploration of the uterus
Empty the bladder
Administer uterotonic agents
Examine lower genital tract for
lacerations.
49
1. Tone (Uterine tone)
2. Tissue (Retained tissue--placenta)
3. Trauma (Lacerations and uterine rupture)
4. Thrombin (Bleeding disorders)
The 4 Ts
50
�Uterine atony causes 80% of
hemorrhage
�Assess and treat with uterine
massage
�Use medication early
�Consider prophylactic medication...
T # 1:
Tone: Think of Uterine Atony
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• Confirms
diagnosis of
uterine atony.
• Massage is
often adequate
for
stimulating
uterine
involution.
Bimanual
Uterine
Exam
52
Medical Treatment of Medical Treatment of
Postpartum HemorrhagePostpartum Hemorrhage
Medications that cause
uterine contractions
Medications that
promote coagulation
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OXYTOCIN• The common medication used to achieve uterine
contraction
• First-line agent to prevent and treat PPH
• Given IV or IM.
• May cause hypotension.
OXYTOCIN“The Champ”
57
1. OXYTOCIN: promotes rhythmic contractions.• Give 10 mg IM or IV, not IU.
1. METHERGINE: promotes rapid tetanic contractions
• 0.2mg (1 amp) IM
1. HEMABATE: promotes long lasting contractions
• 0.25 mg IM q 15min (max X8).
1. CYTOTEC: less effective than methergine
• 400 to 1000 µµµµg (oral, vaginal or rectal)
Summary of Medications Summary of Medications
for Uterine Atonyfor Uterine Atony
58
Fluid Management of Postpartum Hemorrhage
59
-Balanced *(0.9% NaCl, lactated
Ringers-Hypertonic (3.5,5, 7.5% NaCl)
-Hypotonic (0.45% NaCl)
* Same electrolyte concentration as the extracellular
compartnt
-Albumin (5%, 25%)
-Dextran, glucose polymers (40,
70)
-Hydroxyethyl starch (Hespan)
Crystalloid
Colloid
Blood/Blood Products
Fluid Management of Postpartum Hemorrhage
60
Acute Postpartum Blood Loss
PROBLEMS:
Loss of circulatory Volume
Loss of O2 carrying capacity
Restore
volume
1 - Crystalloid
2 - Colloid
�� SaO2
�� O2
carrying
capacity
Supplemental O2 Transfusion
6161
25-30%(15-1800cc) Healthy ? � Crystalloid/Colloid
Medical complications ? � Consider transfusion
30-50%(18-3000cc) Crystalloid/Colloid
Consider transfusion
> 50% ( > 3000cc) Crystalloid/Colloid
Blood transfusion
Clotting factors (FFP, Cryo)
Blood Loss
Hemorrhagic Shock- Fluid Management -
62
Class Blood LossVolume Deficit
Spx Rx
I < 1000 cc 15%Orthostatic tachycardia
Crystalloid
II 1001-1500 15-25%
Incr. HR, orthostasis, mental
Decr cap refill
Crystalloid,
III 1501-2500 25-40%
Incr HR, RR Decr BP,
Oliguria
Crystalloid
Colloid, RBCs
IV > 2500> 40%
Obtunded
Oliguria/anuria
CV collapse
RBC, Crystalloid, Colloid
Managing blood loss by hemorrhage classification
63
Ways to Optimize
hemodynamic status
1.Acute isovolemic hemodilution
2.Acute hypervolemic hemodilution
3.Autologous donation
4.Preoperative transfusion
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Acute isovolemic hemodilution
Withdraw 2-4 u. of Blood ����Replace the volume with crystalloid ����Lower the pre-op Hct ����Replace the blood at end of surgery
Acute hypervolemic hemodilution
Admin 1500-2000cc Crystalloid ����Hemodilution (Lowers pre-op Hct)
Ways to optimize hemodynamic status
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• Delay of placental delivery > 30 minutes
seen in ~ 6% of deliveries.
• Prior retained placenta increases risk.
• Risk increased with: prior C/S,
curettage p-pregnancy, uterine
infection, AMA or increased parity.
• Prior C/S scar & previa increases risk
(25%)
• Most patients have no risk factors.
• Occasionally succenturiate lobe left behind.
T # 2: TISSUE
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Oxytocin 10U in 20cc of NS placed in clamped
umbilical vein.
If this fails, get OB assistance.
Check Hct, type & cross 2-4 u.
Two large bore IVs.
Anesthesia and OR support.
Removal of Abnormal
Placenta
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• Relax uterus with halothane general
anesthetic and subcutaneous
terbutaline.
• Bleeding will increase dramatically.
• With fingertips, identify cleavage
plane between placenta and uterus.
• Keep placenta intact.
• Remove all of the placenta.
Removal of Abnormal Placenta
69 70
• If successful, reverse uterine atony
with oxytocin, Methergine, Hemabate.
• Consider surgical set-up prior to
separation.
• If manual removal not successful, large
blunt curettage or suction catheter,
with high risk of perforation.
• Consider prophylactic antibiotics.
Removal of Abnormal
Placenta
71 72
Episiotomy
Hematoma
Uterine inversion
Uterine rupture
T # 3: Trauma
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Rare: ~1/2000 deliveries.
Causes include:
Excessive traction on cord.
Fundal pressure.
Uterine atony.
Uterine Inversion
74
• Blue-gray mass protruding from vagina.
• Copious bleeding.
• Hypotension worsened by vaso-vagal reaction. Consider atropine 0.5mg
IV if bradycardia is severe.
• High morbidity and some mortality seen: get help and act rapidly.
Uterine Inversion
75
• Push center of uterus with three fingers into abdominal cavity.
• Need to replace the uterus before cervical contraction ring develops.
• Otherwise, will need to use MgSO4, tocolytics, anesthesia, and
treatment of massive hemorrhage.
• When completed, treat uterine atony.
Uterine Inversion
76
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• Rare: 0.04% of deliveries.
• Risk factors include:
• Prior C/S: up to 1.7% of these
deliveries.
• Prior uterine surgery.
• Hyperstimulation with oxytocin.
• Trauma.
• Parity > 4.
Uterine Rupture
78
• Risk factors include:
• Epidural.
• Placental abruption.
• Forceps delivery (especially mid forceps).
• Breech version or extraction.
Uterine Rupture
79
Sometimes found incidentally.
During routine exam of uterus.
Small dehiscence, less than 2cm.
Not bleeding.
Not painful.
Can be followed expectantly.
Uterine Rupture
80
Vaginal bleeding.
Abdominal tenderness.
Maternal tachycardia.
Abnormal fetal heart rate tracing.
Cessation of uterine contractions.
Uterine Rupture before
delivery
81
May be found on routine exam.
Hypotension more than expected with
apparent blood loss.
Increased abdominal girth.
Uterine Rupture after
delivery
82
Risk factors include:
Instrumented deliveries.
Primiparity.
Pre-eclampsia.
Multiple gestation.
Vulvovaginal varicosities.
Prolonged second stage.
Clotting abnormalities.
Birth Trauma
83
Repair of cervical laceration
84
• Hematomas less than 3cm in diameter can
be observed expectantly.
• If larger, incision and evacuation of
clot is necessary.
• Irrigate and ligate bleeding vessels.
• With diffuse oozing, perform layered
closure to eliminate dead space.
• Consider prophylactic antibiotics.
Birth Trauma: Hematomas
85Pelvic Hematoma