weaning failure of cardiac origin prof. jean-louis teboul medical icu bicetre hospital university...
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WeaningWeaning failure of cardiac origin failure of cardiac origin
Prof. Jean-Louis TEBOULProf. Jean-Louis TEBOUL
Medical ICU
Bicetre Hospital
University Paris-South
France
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TREATMENT OF SEVERE CARDIOGENIC PULMONARY EDEMA WITH CONTINUOUSPOSITIVE AIRWAY PRESSURE DELIVERED BY FACE MASK
Invasive or non invasive positive pressure ventilation positive pressure ventilation is an established treatmenttreatment
of severe cardiogenic pulmonary edema cardiogenic pulmonary edema
Weaning-induced pulmonary edemaWeaning-induced pulmonary edema
may develop
and may be a cause of weaning failurecause of weaning failure
in predisposed patients
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PAOPtm
mmHg
SBSBMVMV
6060
5050
4040
3030
2020
00
1010
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Weaning-induced increase in PAOPWeaning-induced increase in PAOP
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LV end diastolic volume
LV end diastolic pressure
AB
C
D
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Radionuclide Radionuclide
angiocardiographyangiocardiography
during weaningduring weaning
in COPD patientsin COPD patients
without CADwithout CAD
Left ventricular function during weaning of patients with COPD Richard C, Teboul JL, Archambaud F et al.
Intensive Care Med 1994; 20 : 181-6
LVEF (%)
MV1 SV MV2
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LV end diastolic volume
LV end diastolic pressure
normal compliance
reduced compliance
A
C
B
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Who are the patients at risk of weaning failure Who are the patients at risk of weaning failure
from from cardiac origin cardiac origin ??
Patients with LV disease (CAD) and associated COPD
• biventricular interdependence
Deep inspiratory fall in intrathoracic pressure and elevated WOB
• airway obstruction
Increased Increased RVRV and LV preloadLV preload
and increased increased LV afterloadLV afterload
Increased cardiac work Increased cardiac work
and thus, increasedincreased
riskrisk of myocardial ischemia myocardial ischemia
Decreased LV compliance Decreased LV compliance
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When should cardiac-related weaning failure When should cardiac-related weaning failure be suspected?be suspected?
. . whenwhen CHF CHF andand COPD COPD coexistcoexist
. when other. when other obvious causes obvious causes of weaning failure of weaning failure have beenhave been discarded discarded
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How to diagnose weaning-induced pulmonary edema?How to diagnose weaning-induced pulmonary edema?
Weaning trialWeaning trial: T-piece T-piece or low levellow level of Pressure supportPressure support
• PA catheter ?
increase in PAOP
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How to diagnose weaning-induced pulmonary edema?How to diagnose weaning-induced pulmonary edema?
• Transpulmonary thermodilution?
Weaning trial: T-piece or low level of Pressure support
• PA catheter ?
Elevation of EVLW
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Cut-off: 6%
Crit Care Med 2014
AUC = 0.89
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How to diagnose weaning-induced pulmonary edema?How to diagnose weaning-induced pulmonary edema?
• Doppler-echo ?
E/A and E/E’ assumed to reflect PAOP
Weaning trial: T-piece or low level of Pressure support
• PA catheter ?• Transpulmonary thermodilution?
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Pulsed waveDoppler
Tissue Doppler
Apical 4-chamber view
or
E
A
E’A’
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or
E
A
E’ A’
determinantsLV relaxation
LV filling pressure
determinant LV relaxation reflects
LV filling pressure
E
E’
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Can E/A and E/E’ at the end of a
Spontaneous Breathing Trial
identify weaning failure from cardiac origin
defined as a weaning-induced increase
in PAOP > 18 mmHg?
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4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
PE - PE +
E/A at the end of the SBT
20
18
16
14
12
10
8
6
4
2
PE - PE +
E/E’ at the end of the SBT
0.95
8.5
The predictive value
of each of these variables
was not sufficiently acceptable
to diagnose weaning-induced
pulmonary edema
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-1 0 1 2 3 4
20
18
16
14
12
10
8
6
4
2
E/A at the end of the SBT
E/E’
at
the
end
of th
e SB
T
8.5
0.95
-1 0 1 2 3 4
20
18
16
14
12
10
8
6
4
2
E/A at-1 0 1 2 3 4
20
18
16
14
12
10
8
6
4
2
PE +
PE - Se = 82%
Sp = 91%
PPV = 88%
NPV = 87%
Combination ofCombination of E/A > 0.95 E/A > 0.95 and and E/E’ > 8.5 E/E’ > 8.5
at the end of a SBT
predicted weaning-induced pulmonary edemapredicted weaning-induced pulmonary edema
with a high accuracy
defined as a PAOP > 18 mmHg at the end of a SBT
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How to diagnose weaning-induced pulmonary edema?How to diagnose weaning-induced pulmonary edema?
• Doppler-echo ?
Weaning trial: T-piece or low level of Pressure support
• PA catheter ?• Transpulmonary thermodilution ?
• BNP or NT-proBNP ?
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Crit Care Med 2014
*
weaning-induced pulmonary edema
no weaning-induced pulmonary edema
MV MVSB SB
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Crit Care Med 2014
BNP
AUC = 0.76
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How to diagnose weaning-induced pulmonary edema?How to diagnose weaning-induced pulmonary edema?
• Doppler-echo ?
Weaning trial: T-piece or low level of Pressure support
• PA catheter ?• Transpulmonary thermodilution ?
• BNP or NT-proBNP ?
• Hemoconcentration ?
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Hydrostatic pulmonary edema
Hemoconcentration
Increase in plasma protein concentration
during weaning could detect
weaning-induced pulmonary edema
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52
59Weaning-induced PO defined as intolerance to SB and a PAOP > 18 mmHg
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-2
0
2
4
6
8
10
12
14
16
18
20
Weaning-induced PO No weaning-induced P0
SBT-induced change in plasma protein concentration (%)
Se = 85 %Sp= 100 %
Anguel et al Intensive Care Med 2008 Anguel et al Intensive Care Med 2008
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Crit Care Med 2014
BNP
Plasma Protein Hb
EVLW
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. Diuretics: if pulmonary edema is assumed to be related to increased preload secondary to increased venous return
Which therapy? Which therapy? Phamacological agentsPhamacological agents
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Am J Respir Crit Care Med 2012; 186:1256-63Am J Respir Crit Care Med 2012; 186:1256-63
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Am J Respir Crit Care Med 2012; 186:1256-63Am J Respir Crit Care Med 2012; 186:1256-63
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Time (hrs) to successful weaning
Am J Respir Crit Care Med 2012; 186:1256-63Am J Respir Crit Care Med 2012; 186:1256-63
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. Diuretics: if pulmonary edema is assumed to be related to increased preload secondary to increased venous return
Which therapy? Which therapy? Phamacological agentsPhamacological agents
. Nitrates: if suspicion of myocardial ischemia
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PAOPSystolic Arterial PressuremmHg
SBTstartMV SBTend SBTstartMV SBTend
Control day
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PAOPSystolic Arterial PressuremmHg
SBTstartMV SBTend SBTstartMV SBTend
PAOP mmHg
SBTstartMV SBTend SBTstartMV SBTend
mmHg PAOPSystolic Arterial Pressure
Control day
Study day
IV nitrates starting at the beginning
of the SBT
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. Diuretics: if pulmonary edema is assumed to be related to increased preload secondary to increased venous return
Which therapy? Which therapy? Phamacological agentsPhamacological agents
. Vasodilators: if suspicion of increased LV afterload
. Nitrates: if suspicion of myocardial ischemia
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. Diuretics: if pulmonary edema is assumed to be related to increased preload secondary to increased venous return
Which therapy? Which therapy? Phamacological agentsPhamacological agents
. Inotropes: not logical!
. Vasodilators: if suspicion of increased LV afterload
. Nitrates: if suspicion of myocardial ischemia
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PS + PEEP
. Decremental levels of PS
and keeping 5 to 8 cmH2O of PEEP
. Continue after extubation (facial mask)
Which therapy? Which therapy? Ventilatory modalitiesVentilatory modalities
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ConclusionConclusion
. In case of preexisting cardiac disease, weaning failure from cardiac origin is not uncommon
. Its recognition is important since a specific therapy (after individualized evaluation) can result in successful weaning
. Complex and intricate mechanisms (vicious circle) generated by marked increased respiratory muscles activity
Thank you