dengue management in icu dwayne
TRANSCRIPT
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Denguemanagement in
ICU- Dr. Dwayne M
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2WHO Handbook for clinical management of Dengue, 2012
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Warning signs
Clinical-• Abdominal pain or tenderness• Persistent vomiting• Clinical fluid accumulation• Mucosal bleed• Lethargy, restlessness• Liver enlargment >2 cm, tender hepatomegalyLaboratory:-• Increase in HCT concurrent with rapid decrease in platelet count
3
Clinical fluid accumulation
LAbdominal tendernessMucosal bleedsPersistant Vomiting
ethargyiver enlargement >2cmsabs (increase Hct/ decrease Platelets)
CLAMP down on Dengue
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4WHO Handbook for clinical management of Dengue, 2012
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Group C: Require emergency treatment
• Severe plasma leakage leading todengue shock
• Severe haemorrhage
• Severe organ impairment
• Loss of plasma
• Loss of blood
• Loss of organ function
5WHO Handbook for clinical management of Dengue, 2012
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Predictors of Severe Dengue• Young age (esp infants)• Caucasian race• AB blood group• Warning Signs• Abdominal Tenderness• Hepatomegaly• Lethargy• Cold extremities• Bleeding• PC <75000/cu mm• Hct value >50 or rise >22% from
baseline
• Viral load assessment• Viral serotype testing• NS1 level semi-quantitive
measurement• Measurement of plasma/serum
cytokine, elastase, hyaluronan,soluble thrombomodulin, NO level• Detection of circulating endothelial
cells
Jeanne A. Pawitan; Dengue Virus Infection: Predictors for Severe Dengue; Acta Med Indones-Indones J Intern Med
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DIAGNOSIS
1. Is it dengue?
2. Which phase?
3. Warning signs?
4. Hydration/ Hemodynamic status?
5. Admission?
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Airway
• Usually clear
• No further intervention needed
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Breathing
• Respiratory rate• Respiratory effort
• B/L Air entry• B/L Chest movements
• Noisy breathing• Noisy Machines
• Cyanosis
• Mental status
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Circulation – Assessment of shock• Heart rate• Peripheral pulses• Central pulses• Colour• Temperature• CFT• BP• Mental Status• Urine Output
PALS Guidelines – American Heart association
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COLD SHOCK WARM SHOCKHeart rate ↑ ↑
Peripheral pulses Feeble Bounding
Central pulses Well felt/↓ Well felt
Colour Pale, mottled Pink
Temperature Cold Warm
CFT >3 seconds Flash
PP Narrow Wide
Mental Status Normal altered Toxic sick child
Urine Output ↓ ↓
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Dengue Shock (VS Septic shock)
• Less likely to have SIRS• Less likely to have tachycardia• Narrow pulse pressure• Mental status better• Higher Hct• Thrombocytopenia more common• Spontaneous clinical bleeding more common• Required less fluid bolus
S. Ranjit et al; Early differentiation between Dengue and Septic Shock; Pediatric Emergency Care, Vol 23, Number 6, June 2007
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AsymptommaticCapillary leak
Cardiac Arrest HypotensiveShock
CompensatedShock
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Severe dengue
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Goals of fluid resuscitation
Improving central and peripheral perfusion• Decreasing tachycardia• Improving BP and pulse volume• Warm and pink extremities• CFT<2 sec.
Improving end organ perfusion• Stable conscious level• Urine output more than 0.5 ml /kg /hr• Decreasing metabolic acidosis
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REASSESS
Examn
UO PCV
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17
WHO Handbook forclinical management ofDengue, 2012
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Bolus – Slow and steady!!
Compensated shock• 1st: over 1hr• 2nd: over 1hr• 3rd: over 1hr
Hypotensive shock• 1st: over 15mins• 2nd: over 30-60mins• 3rd: over 30-60mins
WHO Handbook for clinical management of Dengue, 2012
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Aggressive fluid resuscitation??
• Patients in the W group received less fluids in the 1st hour comparedwith the P group (median 20ml/kg vs 30ml/kg)
• Incidence of acute respiratory distress syndrome significantly greaterin the W group• Duration of ventilation and length of ICU stay longer in P group• Mortality higher in W group
S. Ranjit et al; Aggressive management of dengue shock syndrome may decrease mortality rate. Pediatr Crit Care Med2005; 6: 412-419
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Monitoring
• Mental status• Vital signs every 15-30mins till pt is out of shock• Peripheral perfusion then 1-2 hourly
• BP monitoring – Arterial line• Urine output - hourly till patient is out of shock, then 1-2 hourly
21WHO Handbook for clinical management of Dengue, 2012
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Role of early colloids• Colloids may be the preferred choice if the BP has to be restored
urgently. Colloids have been shown to restore the cardiac index andreduce the level of haematocrit faster than crystalloids in patientswith intractable shock• After two to three boluses of crystalloid without haemodynamic
stability and particularly if the haematocrit is still elevated, it isessential to consider the switch to colloid resuscitation which is moreeffective in lowering the haematocrit
• Dung NM, Day NP, Tam DT. Fluid replacement in dengue shock syndrome: a randomized, double-blindcomparison of four intravenous fluid regimens. Clinical Infectious Diseases, 1999, 29:787-794.
• Ngo NT, Cao XT, Kneen R. Acute management of dengue shock syndrome: a randomized double-blind comparisonof 4 intravenous fluid regimens in the first hour. Clinical Infectious Diseases, 2001, 32:204-213.
• Wills BA et al., Comparison of three fluid solutions for resuscitation in dengue shock syndrome. New EnglandJournal of Medicine, 2005, 353:877-889.
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No advantage of colloids over crystalloids
• No difference in mortality between groups who received crystalloidsand colloids” - Colloids versus crystalloids for fluid resuscitation in Dengue fever patients – a reviewby Dr Pablo Perel
• “Resuscitation of patients with DSS who already have third space fluidaccumulation with crystalloid boluses on priority basis may contributeto recovery phase pulmonary oedema” - Premaratna et al.: Should colloid boluses beprioritized over crystalloid boluses for the management of dengue shock syndrome in the presence ofascites and pleural effusions? BMC Infectious Diseases 2011 11:52
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Ionotropes
• As a temporary measure to prevent life-threatening hypotension indengue shock and during induction for intubation, while correction ofintravascular volume is being vigorously carried out DOPAMINE
(Vasopressors – maintain the central BP but without improving endorgan perfusion. May exacerbate tissue hypoxia and lactic acidosis)
• For myocarditis or ischemic heart disease DOBUTAMINE
• In concomitant septic shock DOPAMINE / NORADRENALINE
WHO Handbook for clinical management of Dengue, 2012
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Role of steroids
• Dengue shock is a hypovolemic state due to plasma leakage (unlikeSeptic shock which is a catecholamine depleted state )• Serum cortisol levels are high in children with dengue shock.
• “There is no good-quality evidence that corticosteroids are helpful forDSS”
Panpanich R, Sornchai P, Kanjanaratanakorn K: Corticosteroids for treating dengue shock syndrome. CochraneDatabase Syst Rev. 2006; 3:CD00348
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Role of IVIg
• The immunological basis of the life-threatening manifestations ofsevere dengue together with the potentially beneficialimmunomodulatory effects of intravenous immunoglobulins (IVIG)suggest a possible place for treatment with this expensive therapy.
• Trials so far have not shown significant benefit in terms of survival orimprovement in clinical parameters with IVIG
Senaka Rajapakse; Intravenous immunoglobulins in the treatment of dengue illness. Transactions of the Royal Society ofTropical Medicine and Hygiene (2009) 103, 867—870
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• Child day 4 of fever• on IVF 7ml/kg/hr• PCV 39% 32%• What will you do?
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Hemorrhagic manifestations• Persistent acidosis Coagulopathy DIC• Thrombocytopenia
• Only minor prolongations in PT, APTT but moderate to severe depression ofplasma fibrinogen concentrations• Levels of the anticoagulant proteins were normal or depleted at the time of
admission to the hospital and decreased significantly during the subsequent24 h. Levels of all of the remaining proteins, except TFPI, were elevatedsignificantly at admission and also decreased during the next 24 h
Briget A Wills et al; Coagulation Abnormalities in Dengue Hemorrhagic Fever in 167 Vietnamese children with dengue shock
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Patients at risk of severe bleeding
• Prolonged/refractory shock• Persistent metabolic acidosis• Renal or liver failure• Non-steroidal anti-inflammatory agents• Any form of trauma, including intramuscular injection.• Haemolytic conditions are at risk of acute haemolysis with
haemoglobinuria
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Treatment of hemorrhagic complications
• Epistaxis – pressure, nasal adrenaline packing• NO role of platelet/FFP transfusion – “transfusion of platelet
concentrates and fresh frozen plasma in dengue were not able to sustainthe platelet counts and coagulation profile”• GI bleed – H2 blockers and PPI used, but efficacy not been studied• Care when inserting NG tube or bladder catheters• Central venous line – under USG guidance
• 5–10ml/kg of fresh-packed red cells or 10–20 ml/kg of fresh whole blood30WHO Handbook for clinical management of Dengue, 2012
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• Blood transfusions only when PCV has fallen to low levels• Do not wait!! PCV will drop to low levels after several boluses of fluid
resuscitation, or if the bleeding is very severe• Change from crystalloid/colloid infusion to blood transfusion
• DIC regime for severe bleeding• Target for multiple transfusions of FFP, Platelets and Cryo• Plasma leakage and bleeding go on unabated!!• “unless transfusion with fresh whole blood is given urgently, the patient will
succumb to H’agic shock with massive third space fluid accumulation”
• Blood transfusion in a shocked patient with ↑PCV• Give colloid bolus 10-20ml/kg – over 1hr if compensated, over 15mins if not
• Blood transfusion in a stable patient with ↓PCV• Not needed – possibly due to hemodilution
WHO Handbook for clinical management of Dengue, 2012
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REASSESS
Examn
UO PCV
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SHOCK FLUIDOVERLOAD
DENGUE
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•Fluids have to be given at justthe right time, in the just theright volume, of just the righttype and for just the rightduration
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Fluid Overload
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• Child with dengue develops fast breathing on day 4 of illness….? Fluid overload? Pleural effusion? pneumonia
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• Shortness of breath misinterpreted as fluid overload or due to pleuraleffusion or pneumonia
• Metab acidosis – quiet tachypnea
• Look for shock
• PCV• ABG ± Lactate
WHO Handbook for clinical management of Dengue, 2012
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• Prophylactic IVF in febrile phase because NS1 Ag Positive• No role – leads to fluid overload• Maintain on oral fluids• If unable to take, IVF for least possible time, switch to oral
• Step up fluid therapy in a well perfused patient with persistently highPCV• Continue same fluids; Step up monitoring
• IVF in recovery phase because patient is not drinking• Huge positive balance• Lets patient’s thirst mechanism kick in after the diuresis
WHO Handbook for clinical management of Dengue, 2012
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Management of fluid overload
• Furosemide bolus 0.5-1mg/kg two to three times daily
• Furosemide Infusion 0.05-0.4mg/kg/hr
• Peritoneal dialysis, CVVH
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Acute respiratory distress and failure
• Severe metabolic acidosis from severe shock
• Fluid overload – large pleural effusions and acites
• Acute pulmonary oedema
• Acute respiratory Distress Syndrome
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Role of Non invasive ventilation
Premaratna et al.: Should colloid boluses be prioritized over crystalloid boluses for the management of dengue shocksyndrome in the presence of ascites and pleural effusions? BMC Infectious Diseases 2011 11:52
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Role of diuretics in ARDS
• The efficacy of furosemide infusion with respect to changes in thearterial blood gas demonstrates its role in respiratory function.
• In patients with ARDS, diuretics should be tried, which could improveoxygenation and avoid the need for mechanical ventilation.
KR Bharath Kumar Reddy et al; Furosemide Infusion in Children with Dengue Fever and Hypoxemia. Indian pediatrics Vol 51APRIL 15, 2014
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Glucose control
Hyperglycemia• Neuroendocrine stress response• Osmotic diuresis• Increased morbidity and
mortality• IV insulin (not s/c)
Hypoglycemia• Starvation, severe liver
involvement• Seizures, mental confusion,
unexplained tachycardia• Treat as emergency with 0.1-
0.5g/kg• Maintain with fixed rate of
glucose-isotonic solution
WHO Handbook for clinical management of Dengue, 2012
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Electrolyte imbalance• Hyponatremia – GI losses, hypotonic solution
• Hyperkalemia – severe acidosis, AKI
• Hypokalemia – GI losses, Stress induced hypercortisol state
• Calcium – repeated blood transfusions, bicarbonate infusions
• Hyperchloremia – large volume of 0.9% NaCl
WHO Handbook for clinical management of Dengue, 2012
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Metabolic acidosis
• Compensated MA – early sign of hypovolemia and shock
• Lactic acidosis
• Sodium bicarbonate – ph<7.1(W/F sodium and fluid overload, increase lactate, decreased Ca)
WHO Handbook for clinical management of Dengue, 2012
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Abdominal compartment syndrome
• Worsening of ventilator parameters• Oliguria• Unexplained metabolic acidosis• Tense ascites• Reduced cardiac output
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• Sedatives, head end elevation, Neuromuscular blockade• NG Decompression, enema• Lasix• Paracentesis• Decompressive Laparotomy
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Myocarditis
• Optimize Hb• Optimize preload with fluids if indicated (slow bolus – 10ml/kg)• Decrease WOB by supplemental O2• Consider early intubation• Consider early ionotropes Dobutamine
• Role for ECHO – for EF, Contractility and IVC status• Lesser role for CVP now-a-days
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Myocarditis
• EF <50% was found in 6.7%, 13.8%, and 36% of patients with DF, DHF,and DSS during the toxic stage, respectively (p <.01)• DSS patients with poor ventricular function had significantly more
tachycardia and hepatomegaly.• While end-diastolic volumes were similarly reduced, patients with
lower EF tended to have lower cardiac output, developed largerpleural effusion, and had higher incidence of respiratoryembarrassment
Apichai Khongphatthanayothin et alk; Myocardial depression in dengue hemorrhagic fever: Prevalence and clinicaldescription. Pediatr Crit Care Med 2007; 8:524 –529
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CNS Involvement
Rajesh Verma et al; Neurological complications of dengue fever: Experience from a tertiary center of north India.Ann Indian Acad Neurol. 2011 Oct-Dec; 14(4): 272-278
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CNS Involvement
Rajesh Verma et al; Neurological complications of dengue fever: Experience from a tertiary center of north India.Ann Indian Acad Neurol. 2011 Oct-Dec; 14(4): 272-278
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• Seizures and altered sensorium – diagnosed as neuroinfection
Febrile phase – febrile seizureTreat as febrile seizure, WATCH FOR WARNING SIGNS
Critical phase – Acute cerebral ischemiaFLUID FLUID FLUID FLUID FLUID FLUIDAny delay (CT scan) Cardiorespiratory collapse and irreversible shock
WHO Handbook for clinical management of Dengue, 2012
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Acute Kidney injury
• Renal hypoperfusion
• RRT of choice – Continuous veno-venous hemodialysis• Alternatives- peritoneal dialysis
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• During critical phase, target UO of 1ml/kg/hr as criterion of adequacyof IVF• Expectation should be scaled down to 0.5ml/kg/hr to avoid fluid overload
• Use of Furosemide for oliguria in critical phase• May worsen hypovolemia while keeping you happy with UO
• “Fluid bolus challenge furosemide” for reduced urine output• Averted oliguric renal failure?!?!• NO!!!! Fluid gone into extravascular space, fluid removed from intravascular
space worsening of hypovolemia
• RRT in critical phase for severe metabolic acidosis and oliguria• RRT only reserved for recovery phase – Haemodynamically stable child• Fluid in critical phase will take care of acidosis and oliguria
WHO Handbook for clinical management of Dengue, 2012
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When to stop IV fluids
• signs of cessation of plasma leakage• stable BP, pulse and peripheral perfusion• haematocrit decreases in the presence of a good pulse volume• apyrexia (without the use of antipyretics) for more than 24–48 hours• resolving bowel/abdominal symptoms• improving urine output.
WHO Handbook for clinical management of Dengue, 2012
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THANK YOU