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ECMO/ECCO2R in Acute Respiratory Failure
Alain Combes, MD, PhDCardiology Institute, Hôpital Pitié-Salpêtrière, AP-HP
Inserm UMRS 1166, iCAN, Institute of Cardiometabolism and Nutrition
Sorbonne Pierre et Marie Curie University, Paris, [email protected]
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Conflict of interest
• Principal Investigator: EOLIA trial• VV ECMO in ARDS• NCT01470703 • Sponsored by MAQUET, Getinge Group
• Received honoraria for lectures from • MAQUET, XENIOS, BAXTER
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ECMO and ECCO2R…To decrease the intensity of MV?
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LUNG SAFEEpidemiology of ARDS
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Probability of hospital survival by driving
pressure
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The evolving paradigm…• ARDSnet strategy might not protect against tidal hyperinflation
• When Pplat remains >28-30 cm H2O • Further decrease of Vt to reduce VILI
• From 6 to <2 ml/kg IBW• To decrease Pplat <25 cm H2O• To decrease ∆P < 12-14 cm H2O• With sufficient PEEP to prevent lung derecruitment
• Extracorporeal gas exchange for• Blood Oxygenation/Decarboxylation• Decrease the intensity of MV
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What areECMO and ECCO2R?Same Technology
Different Objectives…
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Membrane lung O2/CO2 transfer
O2 transferCO2 transfer
ECMO for oxygenation
ECCO2R for Decarboxylation
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Influence of ECMO flow
Schmidt et al, Intensive Care Med, 2013
Adequate Oxygenation
Qecmo > 60% Qco
PaO2 mmHg
SaO2, %
PaCO2 mmHg
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Influence of Sweep Gas Flow
Schmidt et al, Intensive Care Med, 2013
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ECMO and ECCO2R
ECMO• Large cannulas
• High extracorporeal flow• >5000 ml/min
• Large membrane oxygenator
• Full blood oxygenation
• Full blood decarboxylation
• High technicity, ECMO center
ECCO2R• Double lumen catheter• Low flow, respiratory dialysis
• 250-1000 ml/min
• Medium size oxygenator• No blood oxygenation• Partial blood
decarboxylation• Regular ICU
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ECMO and ECCO2R…What is the Evidence?
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Results of series of VV-ECMO in ARDS patients
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The CESAR trial
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• UK, 2001-2006
• ECMO provided only at the Glenfield Hospital, Leicester
• Entry criteria:
• Adult patients (18-65 years) • Severe, but potentially reversible ARDS• Murray score ≥3.0, or • Uncompensated hypercapnia: pH <7.20
• Primary outcome measure
• Death or severe disability 6 months
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Time from randomization to death
Log rank p = 0.03
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17 (25%)
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Et al…
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Et al…
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Et al…
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• The French REVA Registry collected data of patients hospitalized in ICUs
• For H1N1-associated ARDS
• Analysis of factors associated • With death among 123 patients who received ECMO
• Case-control study with • Matching on a propensity score to receive ECMO
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Why early ECMO?
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0
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MV <7 days before ECMO
MV >7 days before ECMO
P <0.005, log-rank
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10
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Results ECCO2R seriesin ARDS patients
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Morris AH, et al. Am J Respir Crit Care 1994;349:295−305.
Randomised clinical trial of pressure-controlled inverse ratio ventilation and ECCO2R for ARDS
Study design
• Randomised controlled clinical trial
• 40 patients with severe ARDS
• ECCO2R versus MV
– Low-flow veno-venous ECCOR2 device
Results
• No significant difference in survival at 30 days (p = 0.08):
– 42% in the MV group (n = 19)
– 33% in the ECCO2R patients (n = 21)
– All deaths occurred within 30 days of randomization
• Study stopped for futility
• >30% patients with severe haemorrhage
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Techniques of the 2000’s…
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Novalung, ILA, Pumpless AV shunt
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Novalung, ILA pumpless AV shunt
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Frequency of complications and adverse effects
Complication / side effect Patients (n)
Ischemia of lower limb after cannulation 9
Cannula thrombosis 4
Compartmental syndrome in a lower limb 4
Haematoma / aneurysm at cannulation site 2
Haemolysis 1
Intracerebral haemorrhage 1
Diffuse bleeding / shock syndrome during cannulation 1
All 22 (24.4%)
Limb ischemia
due to arterial
cannulation +
need for IV
norepinephrineOverall frequency
of complications
and side effects
was 24%
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Hemodec DECAP
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Individual and average (horizontal bar) respiratory variables
before and after initiating CO2 removal
VT (mL/kg PBW) Pplat (cm H2O) PEEP (cm H2O) PaO2 / FiO2)
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Techniques of the 2010’s…
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NOVALUNG
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• iLA activve, Novalung, ILA membrane • 22 French double lumen cannula• Ten patients hypercapnic respiratory failure• Step 1:
• Sweep gas flow increased from 1 to 14 L/min• At constant blood flow
• Step 2: • Blood flow gradually increased at constant sweep gas flow
• At each step measurement of • Arterial blood gas AND • Membrane gas transfer
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Hemolung, Alung Technologies
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Feasibility and safety of low-flow extracorporeal carbon dioxide
removal to facilitate ultra-protective ventilation in patients with
moderate ARDS
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Time course of CRS Time course of driving pressure
Feasibility and safety of low-flow extracorporeal carbon dioxide
removal to facilitate ultra-protective ventilation in patients with
moderate ARDS
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PALP, MAQUET®
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PrismaLung (Baxter)
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Anesth Crit Care Pain Med 2014
Mean CO2 removal rates at FsO2 1
Preclinical study in 5 adult hypercapnic pigs to investigate the performance of thePrismaLung system with different flow rates (blood flow/ sweep gas flow)
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More to come…
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A new paradigm…
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Mild ARDS Severe ARDSModerate ARDS
Incre
asin
g I
nte
nsit
y o
f In
terv
en
tio
n
300 200250 0100150 50
PaO2/FiO2
Low Tidal Volume Ventilation
Higher PEEP
Low-Moderate PEEP
Prone Positioning
NIV
Neuromuscular Blockade
Inhaled NO
ECCO2R
ECMO
HFOV
The ARDS Definition Taskforce. JAMA 2012;307:2526-2533.
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“In God we (may) trust; all others
must bring data…”W. Edwards Deming
(1900-1993)
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We need EOLIA… A new trial of
ECMO for severe pneumonia/ARDS241 patients randomized so far…
YESWECAN
YESWECAN
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A Strategy of UltraProtective lung ventilation
With Extracorporeal CO2 Removal for
New-Onset moderate to seVere ARDS
The SUPERNOVA trial
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Conclusion
• ECMO/ECCO2R: Potential for use in moderate to severe ARDS patients
• To allow further reduction of Vt/Pplat/∆P, to limit VILI…
• ExtraCorporeal CO2 Removal
• “Respiratory dialysis” for moderate ARDS
• VV-ECMO
• For refractory hypoxemia
• For severe ARDS?
• Before large diffusion, (re)test the concept in large randomized clinical trials…
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