adjunctive supportive care proactive primary therapy nutrition therapy that modulates the underlying...
TRANSCRIPT
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Adjunctive Supportive Care
ProactivePrimaryTherapy
Nutrition therapy that modulates the underlying disease process
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Adjunctive Supportive Care
ProactivePrimaryTherapy
Nutrition therapy impacts clinical outcomes
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Adjunctive Supportive Care
ProactivePrimaryTherapy
Timeliness of administration of nutritional therapy matters!
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• infection• trauma• I/R• hypoxemic/ hypotensive
= oxidative stress
Death
organ = failure
mitochondrial dysfunction
Key nutrient deficiencies(e.g. glutamine, selenium)
activation of coagulation
generation of OFR (ROS + RNOS)
endothelial dysfunction
elaboration of cytokines, NO, and other mediators
cellular = energetic failure
Microcirculatory Dysfunction
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Fish Oil supplemented diets?
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Copyright ©2007 The American Society for Nutrition
Mechanisms by which fatty acids can affect immune cell function
Wanten, G. J. et al. Am J Clin Nutr 2007;85:1171-1184
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• 21 patients with sepsis requiring TPN
• Randomized to recieve PN with an n-3 or n-6 lipid emulsion for 5 days
• Dose: 350 ml og s 10% n-3 lipid emulsion (Omegevan)
Am J Respir Crit Care Med 2003; 167: 1321
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TPN with N-3 vs n-6 FAs in severe sepsis. Monocyte membrane FA composition:
arachidonic, EPA, DHA
Mayer K, Am J Respir Crit Care med 2003; 167: 1321
N- 3 group
N- 6 group
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TPN with N-3 vs n-6 FAs in severe sepsis. Ex vivo monocyte cytokine release in response to LPS
Mayer AJRCCM 2003; 167: 1321
N- 3 group
N- 6 group
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• 25 Patients with SIRS or sepsis receiving PN
• Randomized to 50:50 MCT/soybean emulsion or lipid emulsion with 50% MCT, 40% soy, and 10% Fish oil x 5 days
• Dose of fish oils: – rec’d 6.4 gms/day– .09 g/kg/d
Barbosa Critical Care 2010;14:R5
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Barbosa Critical Care 2010;14:R5
• Fish oil group resulted in:
• Greater attenuation of IL-1B, IL-6, and TNF
• Improved Pa02/FiO2 ration by day 6
• No difference in vent days, ICU stay
• Tendency to reduced hospital stay (22 vs 55 days, p=0.08) and fewer deaths 31% vs 40% (p=ns).
Greater treatment effect with higher dose?? treatment effect if control group not
receiving any lipids?
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• Retrospective study of 194 patients with intraabdominal infection leading to sepsis
• Control group rec’d standard PN with soybean/olive oil (80%/20%).
• Treatment group had 10% FO (omegaven) infused on top of standard PN over 30-60 mins
• No effect with fish oils on CRP, organ failure or any clinical outcomes
• Dose of fish oils: rec’d 0.12 g/kg/d over 1 hr! (infusion >0.05 g/kg/hr may be harmful!)
Wohlmuth JPEN 2010
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There appears to be a dose-response curve with IV FO
Pittet Intensive Care Med 2010;36:289-295
However, in this small study of healthy volunteers, no correlation with biological effect
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Fish Oil optimal Dose Determination Study
The FOILED Study• Phase 2 dose finding study
• Mechanically ven’t patients with sepsis with high IL-6 level receiving EN (NO PN lipids)
• Open label use 10% Fish Oil (Omegaven) to 3 groups:
– Group 1: standard care only, no FO
– Group 2: 0.20 kg/day of IBW
– Group 3: 0.50 kg/day of IBW
• Outcomes:
– Safety- SOFA scores, complications, bleeding
– Systemic inflammation: IL-6 and IL-10
– Immunity: LPS ex-vivo stimulation of TNF and IL-6
– Clinical outcomes
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What about enteral fish oils?
(Product enhanced with fish oils +borage oils
+ antioxidants)
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Borage Oil
GLA
DGLA
PGE1 and eicosanoidsthat are lessinflammatory
Replacing AA with DGLA results in
Fish Oil
EPA
Eicosanoidsthat are lessinflammatory
(TXA3, PGE3, LTB5)
Replacing AA with EPA results in
CyclooxygenaseLipoxygenase
Arachidonic Acid
Decreased proinflammatory
eicosanoids(LTB4, TXA2, PGE2)
EPA + GLA Modulate InflammationEPA + GLA Modulate Inflammation
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Effect of Enteral Fish Oils/Borage Oils and antioxidants in Critically Ill with ALI
• RCT of 146 critically ill patients with ALI and BAL+ for WBCs
• Double-blinded; ITT
• Experimental: Oxepa®
• Control: high fat diet
• Groups well matched at baseline
Gadek Crit Care Med 1999;27:1409
After 3-4 days
• Reduction in AA and increase in EPA in lung and alveolar macrophage
• Decrease in neutrophils recovered in BAL fluid
• Improved oxygenation
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Effect of Enteral Fish Oils/Borage Oils and antioxidants in Critically Ill with ALI
• RCT of 146 critically ill patients with ALI and BAL+ for WBCs
• Double-blinded; ITT
• Experimental: Oxepa®
• Control: high fat diet
• Groups well matched at baseline
0
5
10
15
20
25
VentDays
ICUDays
ICUDeaths
Oxepa
control
Gadek Crit Care Med 1999;27:1409
P=0.03 P=0.17P=0.02
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Overall Effect on Mortality
www.criticalcarenutrition.com
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Diets Supplemented with fish oils, borage oils, and
antioxidants
• Recommendation:Based on 1 level 1 studies and 4 level 2 studies, we recommend the use of enteral formula with fish oils, borage oils, and antioxidants in patients with ALI/ARDS.
Canadian Clinical Practice Guidelines JPEN 2003;27:355-373
Updated 2009; www.criticalcarenutrition.com
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Multicenter, Randomized, Double-blinded trial (14 Clinical Sites – Brazil)
200 Patients in the early stages of sepsis (no organ failures; within 36 hrs from onset of sepsis)
Fish oil/borage oil/antioxidant vs standard polymeric
Primary Outcome: Evolution to more severe forms of sepsis (severe sepsis or septic shock)
Secondary Outcome: 28 day all-cause mortality, organ failure development, hyper/hypoglycemic events, insulin use, hospital stay, ICU stay
Investigating Nutritional Therapy with EPA, GLA and Antioxidants Role in SEPsis
Treatment (INTERSEPT)
Pontes-Arruda Crit Care 2011;15:R144
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Pontes-Arruda Crit Care 2011;15:R144
Mostly due to reduced Cardio-
resp failures
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Variable Study (n=53)
Control (n=53)
P Value
Use of mechanical ventilation, n (%)
Invasive 10 (18.9%) 18 (34%) .03984
Non-invasive 5 (9.4%) 6 (11.3%) NS
Number of days using mechanical ventilation*
7 (4-12) 15 (9-21) .0033
Number of ICU days* 7 (4-12) 13 (9-18) <.0001
Number of hospital days* 9 (6-14) 19 (13-24) <.0001
SECONDARY OUTCOMES
No Difference in survival between the groups?
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Timing of FeedingTiming of Feeding
SSUUPPPPLLEEMMEENNTT
““Early Early Full”Full”
Fast ramp upFast ramp up
““Early Early Trophic”Trophic”
(10 ml/hr)(10 ml/hr)N-3 +N-3 +AntioxidantsAntioxidants
(Module delivered (Module delivered as bolus bid)as bolus bid)
ControlControlStandard ENStandard EN
(480 cal/ 20 g pro)(480 cal/ 20 g pro)
n = 250 n = 250
n = 250 n = 250
EDEN-OMEGA: EDEN-OMEGA: Factorial Trial DesignFactorial Trial Design
NIH NHLBI
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OMEGA: 60-Day MortalityOMEGA: 60-Day Mortality
P=0.05
26.6% 16.3%
0
5
10
15
20
25
30
OMEGAObserved
OMEGAAdjusted
ControlObserved
ControlAdjusted
FACTTConservative
%
17.9%16.3%24.6%26.6%
0
5
10
15
20
25
30
OMEGAObserved
OMEGAAdjusted
ControlObserved
ControlAdjusted
FACTTConservative
%
P=0.14
25.5%17.9%16.3%24.6%26.6%
0
5
10
15
20
25
30
OMEGAObserved
OMEGAAdjusted
ControlObserved
ControlAdjusted
FACTTConservative
%
P=0.14
JAMA on line Oct 2011
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OMEGA: Plasma OMEGA: Plasma Eicosapentaenoic Acid (EPA) Eicosapentaenoic Acid (EPA)
Levels (%)Levels (%)
0
5
10
0 3 or 4 6 or 7Day
Pla
sma
Fatt
y A
cids
(%
) OmegaControlGadek-EPA/GLAGadek-Control
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Problems with OMEGA• Hard to attribute excess mortality to FO when the EPA levels
were half of what Gadek achieved, what would the biological mechanism for harm be?
• Multpile tests of significance and baseline imbalances in patients disadvantaging FO group.
• More likely, problem with delivery and utilization in the context of bolus fed patients who were semi starved (fat used for fuel!)
• Improved outcomes in control group may be due to 20 grams extra/day of protein
• Because of different study design, difficult to combine with other studies of continuous administration in moderately well fed patients
Bottom Line:Continue with FO/AOX continuously
administered in optimally fed ICU patients
Cook, Heyland JAMA Oct 2011
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Glutamine supplementation?
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Glutamine levels drop:- following extreme physical exercice- after major surgery- during critical illness
Low glutamine levels are associated with:- immune dysfunction- higer mortality in critically ill patients
Novak F, Heyland DK, A Avenell et al., Crit Care Med 2002 Oudemans-van Straaten HM, Bosman RJ, Treskes Met al., Intensive Car Med 2001
Glutamine: A conditionally essential amino acid
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=> Low plasma glutamine at ICU admission is related to mortality.
The “Oudemans-van Straaten-Study”
“high”
“low”
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Potential Beneficial Effects of Glutamine
Fuel forFuel forEnterocytesEnterocytes
Fuel forFuel forLymphocytesLymphocytes
Nuclotide Nuclotide SynthesisSynthesis
Maintenance ofMaintenance ofIntestinalIntestinalMucosal BarrierMucosal Barrier
Maintenance ofMaintenance ofLymphocyteLymphocyteFunctionFunction
Preservation Preservation of TCA Functionof TCA Function
Decreased FreeRadical availability (Anti-inflammatory action)
GlutathioneGlutathioneSynthesisSynthesis
GLNGLNpoolpool
GlutamineTherapy
Enhanced HeatEnhanced Heat Shock ProteinShock Protein
Anti-cataboliceffect
Preservation of Muscle mass
Reduced Reduced TranslocationTranslocationEnteric BacteriaEnteric Bacteriaor Endotoxinsor Endotoxins
Reduction ofReduction ofInfectious Infectious complicationscomplications
Increased AutophagyIncreased Autophagy
Preserved CellularEnergetics- ATP content
GLNGLNPoolPool
Critical IllnessCritical Illness
Enhanced insulin sensitivity
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Effect of Glutamine:A Systematic Review of the Literature
Infectious Complications
Updated Jan 2009, see www.criticalcarenutrition.com
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Effect of Glutamine:A Systematic Review of the Literature
Hospital Length of Stay
Updated Jan 2009, see www.criticalcarenutrition.com
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Effect of Glutamine:A Systematic Review of the Literature
Updated Jan 2009, see www.criticalcarenutrition.com
Mortality
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1 10 1000.1.01
High Dose
Low Dose
Effect on Mortality
Novak CCM 2002;30:2022
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Results of Phase I Dosing Study
• High dose appears safe • High dose associated with
– no worsening of SOFA Scores
– greater resolution of oxidative stress
– greater preservation of glutathione
– Improved mitochondrial function
Heyland JPEN Mar 2007
Parenterally Enterally
Glutamine/day 0.35 gms/kg 30 gms
Antioxidantsper day
500 mcg Selenium
Vit C 1500 mgVit E 500 mg
B carotene 10 mgZinc 20 mgSe 300 ug
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RCT 368 heterogeneous critically ill patients
Double-blind Enteral nutrition supplemented
glutamine: 20 grams/L Control: Glycine 20g/L Well matched groups Glutamine group rec’d average
19 g/day of glutamine
Hall Intensive Care Med 2003;29:1710
Inadequate Dose and Wrong Patient Population?
0
5
10
15
20
Mortality
Glutamine
Control
No differences noted
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CCM 2002;30:2032
No difference in outcome for patients who stayed <9 days
but significant survival advantage for those who
stayed >9 days
The longer you stay, the greater duration of exposure, the greater the benefit
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Canadian Critical Care Nutrition Clinical Practice
Guidelines• “If using parental nutrition, we strongly
recommend supplementing with parenteral glutamine.”
• “Enteral Glutamine should be considered for Burns and Trauma Patients.”
• “There are insufficient data to support the routine use of enteral glutamine in other critically ill patients.”
• Benefit of Parenteral Glutamine in Patients on EN?
JPEN 2003;27:355 see www.criticalcarenutrition.com for current version
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Admitted to ICU
? PN
Glu Se Glu + Se None
Andrews BMJ 2011:342
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• 10 centres in Scotland • 502 Patients expected to be in ICU for at least
48h and required PN meet at least half their requirements
• Randomized 2.6 days after admission to ICU• Trial PN isocaloric and isonitrogenous, given for
up to 7 days unless died or stopped PN» Glutamine 20g/d» Selenium 500μg/d» Both» Neither
• Main Outcomes:– New infections – Mortality (ICU/HDU and at 6 months)
• Prespecifed analysis of people having ≥ 5• Median duration of study PN was 4-5 days
The SIGNET Trial - DesignThe SIGNET Trial - Design
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The SIGNET Trial – RESULTSThe SIGNET Trial – RESULTS
Effect of GlutamineEffect of Glutamine
No significant differences
Confirmed infections within 14 daysMortality
No significant differences
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The SIGNET Trial – RESULTSThe SIGNET Trial – RESULTS
Effect of SeleniumEffect of Selenium
No significant differences
Confirmed infections within 14 days
P=0.12 P=0.02
Mortality
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• Right patient population?– Only about half getting PN at time of
randomization
• Timing of intervention?– Started too late (2.6 days plus time
to get PN running)
• Inadequate exposure to intervention?– Too small of dose– Too short of duration (4-5 days)
The SIGNET Trial – The SIGNET Trial – QuestionsQuestions!!
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• Multicenter trial in Spain• 127 patients with APACHE II score >12 and
requiring PN for 5–9 days• Standard PN vs. Supplemented with 0.5
g/kg/d of Ala-Gln dipeptide• Enrolled patients rec’d only 5-6 days of PN
Grau CCM 2011; 39
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P=0.10 P=0.03
Grau CCM 2011; 39
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Scandinavian Glutamine Trial: a Pragmatic Clinical Multi-Centre RCT of ICU patients
• 413 Patients given nutrition by EN and/or PN route • Within 72 hrs of ICU admission• supplemented as IV L-Ala-Glutamine, 0.283 g/kg/day administered
separate from PN (Placebo was saline in identical bottles.)• Primary endpoint SOFA; infections not recorded• All included patients were considered as intention-to-treat (ITT) patients.• Patients given supplementation for > 3 days (68%) were considered as
predetermined per protocol (PP) patients.
No effect on SOFA
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ICU 28d 6m
0
10
20
30
40
mo
rtal
ity, %
ITT GLN (n=205)
PP GLN (n=145)
ITT CON (n=208)
PP CON (n=139)
P < 0.05
NS
NS
jw -10
Scandinavian Glutamine Trial (prel results)
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Updated Meta-AnalysisEffect on Mortality
According to control group mortality highest to lowest
April 2011
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Updated Meta-AnalysisEffect on Infection
April 2011
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Updated Meta-AnalysisEffect on Hospital LOS
April 2011
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Antioxidant supplementation?
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Death
MetabolicShutdown
Survivors
•↓mt DNA•↓ ATP, ADP, NADPH•↓ Resp chain activity•Ultra structural changes
↓ mitochondrial activityProlonged
inflammationNO
Endocrineeffects
cytokine effect
Genetic down regulation
Tissue hypoxia
• preserved ATP•Recovery of mt DNA•Regeneration of mito proteins
Underlying Pathophysiology of Critical Illness (2)
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mtDna/nDNA Ratio by Day 28 Survival
0 5 10 15 20 250.0
0.5
1.0
1.5
2.0
Alive IndividualsExpired IndividualsAlive Reg lineExpired Reg Line
P=0.04
Day
mtD
na
/nD
NA
Ra
tio
Heyland JPEN 2007;31:109
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Effect of Antioxidants on Mitochondrial Function
Heyland JPEN 2007;31:109
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mitochondria
Cell
Respiratorychain
nucleus
nDNA mtDNA
Mitochondrial Damage
ROS
RNS
LPS exposure leads to GSH depletion and oxidation of mtDNA within 6-24 hours
Levy Shock 2004;21:110 Suliman CV research 2004;279
Potentially Irreversible by 48 hours
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N-Acetylcysteine Treatment to Prevent the Progression of Multisystem Organ Failure:
A prospective, randomized, placebo-controlled study
• 100 patients admitted to ICU with MODS
• Randomized to NAC (150 mg/kg bolus followed by 12 mg/hr) vs placebo
• No difference in clinical outcomes
• Median time to treatment 24 hrs
P=0.05
% mortality
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What do the clinical studies show?
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Influence of early antioxidant supplements on clinical evolution and organ function in critically ill cardiac surgery, major trauma and subarachnoid
hemorrhage patients.
0
50
100
150
200
250
0 1 2 3 4 5
CardiacTraumaSAH
CRP levels daily in the Control groups
Significant reduction with AOX in Cardiac and Trauma but not SAH
Berger Crit Care 2008
RCT 200 patients IV supplements for 5 days
after admission (Se 270 mcg, Zn 30 mg, Vit C 1.1 g, Vit B1 100 mg) with a double loading dose on days 1 and 2 (AOX group), or placebo.
No affect on clinical outcomes
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Randomized, Prospective Trial of AntioxidantSupplementation in Critically Ill Surgical
Patients
Nathens Ann Surg 2002;236:814
Surgical ICU patients, mostly trauma
770 randomized; 595 analysed
alpha-tocopherol 1,000 IU (20 mL) q8h per naso- or orogastric tube and 1,000 mg ascorbic acid IV q8h or placebo
Tendency to less pulmonary morbidity and shorter duration of vent days
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Treatment Stratgy For Sepsis?
Multicenter RCT in Germany double-blinded non-ITT analysis
249 patients with severe sepsis
standard nutrition plus 1000 ug bolus followed by 1000 ug/day or placebo x14 days
0102030405060708090
100
28 day Mortality
SeleniumPlacebo
Greater treatment effect observed in those
patients with: •supra normal levels vs normal levels of selenium
•Higher APACHE III
•More than 3 organ failures Crit Care Med 2007;135:1
p=0.11
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• Phase II study building on previous dosing work• 35 Patients with SIRS and APACHE II >15• Randomized within 24 hrs of admission • Received either placebo or IV Se as a bolus-loading dose of
2,000 ug followed by continuous infusion of 1,600 ug/ day for 10 days.
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•Confirms observation of SIGNET trial and Berger study in burns•Mechanism related to:• increase neutrophil and macrophage function?• reversible inhibition of NF-kB binding to DNA• induction of apoptosis and cytotoxicity in activated pro-inflammatory cells• a direct virucidal or bactericidal effect
No serous adverse events noted
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• Randomized, open-label, single-centre clinical trial
• 150 patients with SIRS/sepsis and a SOFA score of >5.
• Patients in the Se group received 1,000 ug on day followed by 500 ug/day on days 2–14.
• Administered daily over 30 mins.
• Patients in both groups received a standard Se dose (75 ug/day).
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Greater treatment effect in sicker patients!
P=0.10
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o 16 RCTso Single nutrients (selenium) and combination
strategies (selenium, copper, zinc, Vit A, C, & E, and NAC)
o Administered various routes (IV/parenteral, enteral and oral)
o Patients:o Critically ill surgical, trauma, head injuredo SIRS, Pancreatitis, Pancreatic necrosiso Burnso Medical o Sepsis, Septic Shock
Supplementation with Antioxidants in the Critically Ill: A meta-analysis
Heyland Int Care Med 2005:31;327;updated 2011
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Effect of Combined Antioxidant
Strategies in the Critically IllEffect on Mortality
Updated April 2011
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Effect of Combined Antioxidant
Strategies in the Critically IllEffect on Infection
Updated April 2011
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Biological Plausibility!
Inflammation/oxidative stress
Mitochondrial + Microvascular dysfunction
Organ dysfunction
Antioxidants
Antioxidants
Antioxidants
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Supplemental Antioxidant Nutrients
• Recommendation:Based on 3 level 1 studies and 13 level 2 studies, the use of supplemental vitamins and trace elements should be considered.
Canadian Clinical Practice Guidelines JPEN 2003;27:355-373
Updated 2009; www.criticalcarenutrition.com
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Pharmaconutrients Impact Outcomes!
www.criticalcarenutrition.com
1 10 1000.1.01
Glutamine
Antioxidants
Fish/Borage OilsPlus AOX
Effect on Mortality
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enteral / parenteralsupply
L-Arginine L-CitrullineL-Ornithine
Polyamine Synthesis • Putrescine• Spermidine• Spermine
Hormone release
• GH• IGF• Insulin• Glucagon• Prolactin• catecholamines
Urea
Nitrogenous compounds
• Nitric oxide• Nitrite• Nitrate
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Figert… Ochoa Surg Forum 1998
Arginine Metabolism after Trauma in Mice
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cNOS
cNOS + iNOS
Eff
ect o
f A
rgin
i ne
ind u
ced
NO
for
mat
ion
Har
mfu
lB
enef
itia
l
Arginine / NO availability
Optimal NO-Balance
- Hemodynamic instability- Immune Suppression- Cytotoxicity- Organe dysfunction
- Microcirculation - Immune augmentation
Suchner Brit J Nutrition 2001
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Overall Effect on Mortality (2009)
www.criticalcarenutrition.com
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Overall Effect on Infection (2009)
www.criticalcarenutrition.com
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Diets Supplemented with arginine
and select other nutrients
• Recommendation:Based on 4 level 1 studies and 18 level 2 studies, we recommend that diets supplemented with arginine and other select nutrients not be
used for critically ill pts.
Canadian Clinical Practice Guidelines JPEN 2003;27:355-373
Updated 2009; www.criticalcarenutrition.com
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=
Critically Ill patient not the same as Elective Surgery
patient!
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Heyland JAMA 2001;286:944
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Elective Surgical Patient
• cellular immune dysfunction – T-cell
• decrease cytokine activation – IL-2, IFN
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Elective Surgical Patient
arginase
arginine
expression of zeta chain
Taheri Clin Cancer Res 2001 ;7:958
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Summary
• Nutrients/Nutritional strategies– Modulate underlying pathphysiological processes– Improve clinical outcomes, particularly in sickest
patients– Disease processes and treatment effects are time
dependent
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ICU length of stay
Nutrition Therapy for Critically ill Patients of the Future
Pare n t e r a l Pharmaconutrition
Enteral Pharmaconutrition
Assement of nutritional risk
Measurement of biomarker to determine which pharmaconutrient
1. enteral nutrition
? parenteral nutrition
Set of tools to monitor response to nutrition/nutrient therapy
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Questions?