sepsis and septic shock in pregnancy · pdf file–mental status, uop, capillary refill...
TRANSCRIPT
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Sepsis and Septic Shock
in Pregnancy
John R. Barton, M.D.
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Disclosure of Relevant
Financial Relationships
Research support
• Alere, San Diego (BIOSITE)
• Beckman Coulter
(Biomarkers for preeclampsia)
Consultation
• GTC Biotherapeutics
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Comparison of Sepsis With
Other Major Diseases
†National Center for Health Statistics, 2001. §American Cancer Society, 2001. *American Heart Association.
2000. ‡Angus DC et al. Crit Care Med. 2001;29(7):1303-1310.
AIDS* Colon Breast
Cancer§
CHF† Severe
Sepsis‡
Cases / 1
00,0
00
Incidence of Severe Sepsis Mortality of Severe Sepsis
AIDS* Severe
Sepsis‡
AMI† Breast
Cancer§
0
50
100
150
200
250
300
0
50,000
100,000
150,000
200,000
250,000
Dea
ths
/Ye
ar
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“Hectic fever (sepsis) at its inception is difficult to
recognize but easy to treat.
Left untended, it becomes easy to recognize but difficult to
treat.”
Niccolo Machiavelli
The Prince, Book III
- Circa 1498
The fundamental clinical problem of sepsis was readily
apparent even to the casual observer over 500 years ago
Steven M. Opal, MD
International Sepsis
Forum Symposium
Sept. 27, 2007
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Ignaz Semmelweis (1818-1865)
1840’s:Lying-in Hospital Vienna
Divided into two clinics- alternating admissions every 24 hours:
1. First Clinic: Doctors and medical students-did autopsies between deliveries
2. Second Clinic: Midwives-came in off the street to deliver-wore gloves outside
0
2
4
6
8
10
12
14
16
Mate
rnal m
ort
alit
y,
1842
First Clinic Second
Clinic
Observed: Doctors’ hands smelled like corpses
(putrefied) but not midwifes; death rate went down
when students on vacation- no autopsies
“It is not by chance that a single obstetrician has 16
fatal cases in a single month - I can only dispel the
sadness which falls upon me by gazing into that
happy future when the infection will be banished”
- Circa 1858
16%
7%
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Hand antisepsis reduces the frequency of postpartum sepsis
(Hosp Epidemiol Infect Control, 2nd Edition, 1999)
2nd clinic
0
2
4
6
8
10
12
14
16
18
1841 1842 1843 1844 1845 1846 1847 1848 1849 1850
Ma
tern
al
Mo
rtality
(%
)
MDs Midwives
Maternal Mortality due to Postpartum“purtrefaction”
Lying-in Hospital, Vienna, Austria,
1841 - 1850
Semmelweis’ Hand
Hygiene Intervention
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The Intervention: Hand scrub with chlorinated lime solution.
Removed the putrefying smell from the hands of students and doctors.
Hand hygiene basin Vienna, 1847
What was Semmelweis’s reward in 1848 for this major contribution?
- Fired by the hospital board for enforcing hand washing requirement for doctors
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Systemic Inflammatory Response
Syndrome (SIRS or SSI)
• Inflammatory process
– Infection
– Noninfectious (burns, trauma)
• Requires 2 or more of following:
– Temp > 380 C or < 360 C
– HR > 90 bpm
– RR > 20/min or PaCO2 < 32 mmHg
– WBC > 12,000, < 4,000 or > 10% bands
• Criteria may differ with physiology of pregnancy
– HR >110 bpm, RR >24/min, Temp > 390 C
– WBC > 15,000
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Definitions
• Sepsis
– SIRS due to infection
• Severe Sepsis
– Sepsis associated with: • Organ dysfunction
• Hypotension
• Hypoperfusion
– Hypoperfusion abnormalities include: • Lactic acidosis
• Oliguria
• Acute alteration in mental status
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Definitions
• Septic Shock
– A subset of severe sepsis
– Sepsis-induced hypotension
persisting despite adequate fluid
resuscitation
– Requirement for vasoactive
medications
Bone et al. Chest 1992
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Case History
• 31 wks, sore throat, refuses antibiotics
– “It might hurt the baby”
• Presents 24 hours later
– Tachypnea (RR 70 / min)
– Tachycardia (HR 140 / min)
– Hypotension (SBP 70 mmHg)
– Hypoxic (02 sat 82%)
– Anuria
– Febrile (101.2 F)
– Ammonia level 98 micro mol / L
– IUFD
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Case History
• Organ dysfunctions
– Cardiac Hepatic
– Respiratory Hematologic
– Gastroenterologic Renal
– Neurologic
• Intubation, Swan-Ganz, Pacemaker
• Dopamine, Dobutamine, Levophed
• CPR
• Death 8 hrs from admission
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Group A Streptococcus
The Etiology, Concept and Prophylaxis of Childbed Fever
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• Class B IDDM at 37 wks gestation
• Previous cesarean section x 1
• Maternal weight 200 kg (BMI 65)
• TOLAC: 7 cm cx dilatation for 5 hrs – “we wanted to avoid c/s with obesity”
• Necrotizing fasciitis post op day 5
• Organ dysfunction – Cardiac
– Respiratory
– Hematologic
– Gastroenterologic
– Hepatic
– Renal
Case History
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Microabscess
Fascia
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Mortality %
Mortality By Number of Organ Dysfunctions
Angus DC,et al, Crit Care Med 2001
80
70
60
50
40
30
20
10
0
One Two Three Four
76%
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Early Goal Directed Therapy
• Early provision of time sensitive
therapies (within 6 hrs)
• Aggressive hydration
• Initiation of antibiotics
• If indicated
• Vasoactives
• Transfusion
• Inotropes
For flow diagram see
Rivers E et al, N Eng J Med 2001
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Later Goal Directed Therapy
• Complete within 24 hours
• Initially recommended
– Administer “physiologic” steroids
– Administer drotrecogin alpha
• WRONG per PROWESS-SHOCK Trial 2011
– Tight glucose control (80-110 mg/dl)
• WRONG per NICE-SUGAR study 2009
and VISEP Trial 2008
Rivers E et al, N Eng J Med 2001
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The Importance of Early Goal-Directed Therapy (EGDT) for Sepsis Induced Hypoperfusion
Adapted from Rivers E, Nguyen B, Havstad S, et al. N Engl J Med 2001;
345:1368-1377 Table 3, page 1374
In-hospital mortality
(all patients)
0
10
20
30
40
50
60 Standard therapy
EGDT
28-day mortality
60-day mortality
NNT to prevent 1 event (death) = 6 to 8
Mo
rtality
(%
)
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Septic Shock Standard Orders
• Your hospital should have them
– But do you know where they are?
• Central hemodynamic monitoring
– CVP, Arterial line
• Involvement of
– Pharmacy
– Infectious disease specialists
– Critical care specialists
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Algorithm for Septic Shock in Pregnancy
Intubation if needed
Administer oxygen Assess breathing
Initiate IV fluid bolus
Obtain central venous access
(CVP, ScvO2)
Assess airway
Activate Septic Shock Standard Orders Stat cultures, labs and antibiotics (within 1st hour)
Identify source of infection
Assess volume
status
20 ml NS/kg over 1 hour
Barton, Sibai. Obstet Gynecol 2012
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Fluid Resuscitation
• Central line placement
• Bolus fluids early in resuscitation
– Substantial volumes needed (6-10 L NS)
• Colloids are not superior to crystalloids
• Warm IV fluids
• CVP and PCWP “normal” do not exist
• Physiologic perfusion endpoints
– MAP > 65 mmHg
– UOP > 25 ml/hr
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Antimicrobial Therapy
• Infection prevention
• Prompt cultures
– Don’t delay therapy
– Often (1/3) blood cultures negative
• Prompt empiric antibiotic therapy
– Survival differences seen in delay of therapy of
only 1 hr
• Source control
– Debridement of infected tissue
– Search for surgically correctable origin infection
(abscess, appendicitis, etc.)
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Vulvar necrotizing fasciitis
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Post-op C/S
Multilocular
abscess
Displaced uterus
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Lap sponge count correct?
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Postpartum
necrotizing
fasciitis
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Cultures
• Urine
• Endometrium
• Wound or episiotomy site
• Blood
– Minimum 2 blood cultures
• 1 percutaneous
• 1 from each vascular access (>48 hr)
• Amniotic fluid
• Other (e.g., sputum, drains)
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Empiric Antimicrobial Therapy
• Gentamycin 1.5 mg/kg IV, then 1 mg/kg IV every 8 hours
• Clindamycin 900 mg IV every 8 hours
• Penicillin 3,000,000 units IV every 4 hours or
• Vancomycin 15 mg/kg IV then dosing by pharmacy
• Zosyn 4.5 gm IV STAT, then every 6 hrs or
• Your hospital’s septic protocol
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Vasoactive Therapy
• “Fill the tank before you
squeeze the pipes” – William C. Mabie, M.D. 1990
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Vasoactive Therapy
• Indication
– Hypoperfusion despite fluid resuscitation
– Initial treatment of profound hypotension
• Administration and monitoring
– Central venous access
– Invasive arterial blood pressure
– Pulmonary artery catheter (rarely)
• GOAL: Evidence of increased perfusion
– Mental status, UOP, Capillary refill
• Drug of choice
– Not what you might think
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Norepinepherine
• First line therapy
• Increases MAP
– Significant α-mediated vasoconstriction
– Mild β-mediated increase in stroke volume
• Successfully improved hemodynamics and O2 delivery in 93% pts (Dopamine 31% pts)
• Effectively decreases lactate
• Improves UOP
• Dopamine renal enhancing effects a myth
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Corticosteroids
• Treat patients who still require
vasopressors despite fluid
replacement.
– Hydrocortisone 200-300 mg/day, for 7
days in three or four divided doses or by
continuous infusion.
• Wean steroid dose if septic shock
resolves.
• ACTH stimulation test not required
Bone, et al. NEJM 1987; 317-658
VA Systemic Sepsis Cooperative Study Group. NEJM 1987; 317:659-65
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MAP 50-65 mmHg or CVP below 8 mmHg?
NS 500 mL over 30 minutes
Repeat bolus until 30 mL/kg NS IV over 3 hours
MAP > 65 mmHg; urine output > 25 mL/hr?
MAP > 65 mmHg?
Evaluate need for delivery
MAP < 50 mmHg? Consider vasopressors
Norepinephrine
Vasopressin
Steroids for refractory shock
MAP > 65 mmHg?
Observe need for further IV fluid
bolus
Yes
No
Yes
Yes
No
No
No
Barton,
Sibai
2012
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Presentation: Temp 103.5, severe flank pain, N and V
Diagnosis: Pyelonephritis
Treatment: IV Fluids, Acetaminophen, IV Antibiotics
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3 hrs post therapy: Note resolution of tachycardia and tachysystole
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Stress ulcer
prophylaxis
DVT
prophylaxis
Maintenance Phase Anticipation of complications
Consider
inotropic
agent
Reassess
antibiotics,
narrow
spectrum
Fetal heart rate,
uterine activity
monitoring
Glucose
>180
mg/dl,
initiate
insulin
Lung
protective
ventilation
for pts with
ARDS
Transfuse
PRBC
Hgb < 7.0
gm/dl
Barton, Sibai
Obstet Gynecol 2012
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Herpes Simplex Hepatitis
Viral Etiologies for Sepsis in Pregnancy
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H1N1 influenza-associated ARDS: Bilateral infiltrates
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Your Text
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Indications for surgical intervention in
Severe sepsis / Septic shock
• Cholecystitis with bile duct obstruction
• Necrotizing pancreatitis
• Perinephric abscess
• Acute appendicitis
• Obstructing renal stone
• Retained products of conception
• Uterine microabscess / gas gangrene
• Bowel infarction
• Pelvic abscess
• Necrotizing fasciitis
• Infected episiotomy site
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Indications for Delivery
• Maternal
– Intrauterine infection
– Development of DIC
– Compromised cardiopulmonary function by uterine
size and/or peritoneal fluid
• Compartment syndrome
• Multifetal gestation
– Severe ARDS/ barotrauma
– Cardiopulmonary arrest
• Fetal
– Fetal demise
– Gestational age associated with low neonatal
morbidity / mortality
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Prevention of Surgical Site Infection
• Treat infections remote to surgical site before elective surgery
• Shower with antiseptic agent the night prior to surgery
• Abstain from smoking (30 d)
• Glycemic control in diabetics
• Hair removal around incision by electric clippers not razor
• Antiseptic skin prep
www.cdc.gov/ncidod/dhqp/gl_surgicalsite.htmL.
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Obesity Trends*Among U.S. Adults
*BMI >30 BRFSS, 1991, 1996, 2004
Don’t
mess
with
Texas!
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Prevention of Surgical Site Infection
• Preoperative antibiotics
– 1-2 gm cefazolin
– 1-2 gm cefotetan
• Higher dose for obese patients
– BMI > 30
– Weight >100 kg
• Up to 60 min before skin incision
– Compared to Ab at cord clamping
– 48% reduction in surgical site infection*
*Kitter et al Obstet Gynecol 2012
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Outcome
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References
• Rivers E, Nguyen B, Havstad S, et al. Early goal-directed therapy in the treatment of severe sepsis and septic shock. N Engl J Med 2001;345:1368-77.
• Dellinger RP et al. Surviving Sepsis Campaign guidelines for management of severe sepsis and septic shock. Crit Care Med 2004;32:858-873.
• Dellinger RP et al. Surviving Sepsis Campaign: International guidelines for management of severe sepsis and septic shock: 2008. Crit Care Med 2008;36:296-327.
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References
• Mabie WC, Barton JR, Sibai BM. Septic shock in pregnancy. Obstet Gynecol 1997;90:553-61.
• Barton JR, Sibai BM. Severe sepsis and septic shock in pregnancy. Obstet Gynecol 2012:120
• Opal SM. A brief history of sepsis: Landmarks in the understanding of severe infection and sepsis. International Sepsis Forum Symposium, Paris France. Sept 27, 2007
• Guinn DA, Abel DE, Tomlinson MW. Early goal directed therapy for sepsis during pregnancy. Obstet Gynecol Clin North Am 2007;34:459–79.
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References
• NICE-SUGAR Study Investigators, Finfer S, Chittock DR, Su SY, et al. Intensive versus conventional glucose control in critically ill patients. N Engl J Med 2009;360:1283-1297.
• Critical care in pregnancy. ACOG Practice Bulletin # 100. Obstet Gynecol 2009;113:443-50.
• Bernard GR. Drotrecogin alfa (activated) (recombinant human activated protein C) for the treatment of severe sepsis. Crit Care Med 2003; 31[Suppl.]:S85-S90.
• Dellinger RP. Cardiovascular management of septic shock. Crit Care Med 2003:946-955.
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References
• Walsh C, Scaife C, Hopf H. Prevention and
management of surgical site infections in
morbidly obese women. Obstet Gynecol
2009;113:411-5.
• Bone RC, Balk RA, Cerra FB, et al.
Definitions for sepsis and organ failure and
guidelines for the use of innovative therapies
in sepsis. Chest 1992;101:1644-55.
• Brunkhorst FM, Engel C, Bloos F, et al.
Intensive insulin therapy and pentastarch
resuscitation in severe sepsis. N Engl J Med
2008;358:125-39.
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References
• DeBacker D, Biston P, Devriendt J, et al.
Comparison of dopamine and norepinephrine
in the treatment of shock. N Engl J Med
2010;362:779-89.
• Perner A, Haase N, Guttormsen AB, et al.
Hydroxyethyl starch 130/0.42 versus Ringer’s
acetate in severe sepsis. N Engl J Med
2012;367:124-134.
• Sprung CL, Annane D, Keh D, et al.
Hydrocortisone therapy for patients with
septic shock. N Engl J Med 2008;358:111-24.
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References
• Kitter ND, McMullen KM, Russo AJ, et al. Long-
term effect of infection prevention practices
and case mix on cesarean surgical site
infections. Obstet Gynecol 2012:120:246-51.
• Antimicrobial prophylaxis for cesarean
delivery: timing of administration. Committee
Opinion No. 465. ACOG Obstet Gynecol
2010:116:791-2.
• Use of prophylactic antibiotics in labor and
delivery. Practice Bulletin No. 120. ACOG
Obstet Gynecol 2011:117:1472-83.
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Learning Objectives
• Discuss the causes and pathophysiology
of sepsis
• Discuss goal-directed therapy in the
treatment of severe sepsis and septic
shock
• Review indications for surgery or
delivery in the setting of severe sepsis
• Review prevention strategies of surgical
site infection and sepsis
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Historical Guidelines for Sepsis Therapy
• Society of Critical Care Medicine (1991)
– Definitions of sepsis/septic shock
• Society of Critical Care Medicine (1999)
– Practice parameters for hemodynamic support of
sepsis in adult patients
• The Surviving Sepsis Campaign
– Phase I (2001) : Goal directed therapy in the
treatment of severe sepsis to reduce mortality
– Phase II (2004) : Guidelines published for
management
– Phase III (2008): Guidelines translated into
clinical practice
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Compensatory Anti-
Inflammatory Response
Pro-Inflammatory
Response
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Perner, et al
NEJM 2012
HES 130 / 0.4
Ringer’s
acetate
Death rate
at 90 days
43% Ringer’s
51% HES 130
Days since randomization
Pro
babili
ty o
f S
urv
ival
Fluid Resuscitation
Severe Sepsis
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"Except on few occasions,
the patient appears to die from
the body's response to infection rather than
from it."
Sir William Osler-
in
“The Evolution of Modern Medicine”-1904
Circa 1904
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Drotrecogin Alfa (Xigris)
• Decreases microvascular thrombosis
• Decreases duration of hypotension
• BUT
– Increases risk of fatal bleeding (1.5-5%)
– Very expensive
• * FDA market withdrawal (10/25/2011)
– PROWESS-SHOCK trial
– Failure to show survival benefit
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Septic Shock in Pregnancy
• Case series of 18 patients
– 13 survivors
– 5 non-survivors
• Causes of shock
– Pyelonephritis (n = 6)
– Chorioamnionitis (n = 3)
– Postpartum endometritis (n = 2)
– Toxic shock (n = 2)
Mabie W, Barton J, Sibai B. Obstet Gynecol 1997
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Ventricular
Function
Group I
Normal
Group II
Mildly
Depressed
Group III
Markedly
Depressed
Mabie et al
1997
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Dopamine
• Renal enhancing effects are a myth
• 1st line use in sepsis increases death
– Tachyarrythmias
– CNS effect
• Use in sepsis increases cost
– Increased sedation requirements
– Increase ventilator duration
– Increased ICU and hospital LOS
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Varicella-Zoster
in Pregnancy
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Predisposing Factors for Surgical
Site Infection in Obese Women
• Tissue hypoxia
– Decreased vascularity of SQ fat
– Higher risk of hypoxemia
• Increased risk of hematoma / seroma
• Persistent skin moisture
• Decreased tissue antibiotic levels
• Increased prevalence of diabetes
• Difficult exposure
– Longer operative time
– Trauma from retractors Walsh et al, Obstet Gynecol 2009
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BACKGROUND
Global
• Puerperal sepsis
– 75,000 maternal deaths / year
• Puerperal infections
– 16 % of maternal deaths
– 5-10 % of maternal morbidity