“Its been called names…..

When Midnight Strikes: Managing the First 24 hours of Septic Shock

Chito C. Permejo, MD, FPCP, FPCC, FPSCCM

Objectives:

• Are there new criteria for establishing the diagnosis of septic shock?

• What is the survival rate of these patients?

• How do we tide over patients in septic shock especially in the first 24 hours?

Introduction

• Sepsis – presence (probable or documented) of infection

together with systemic manifestations of infection.

– EPIC II: 40-60% of patients admitted to ICU have infection, mortality rate of 25% (Canada)

– In the US, 50% mortality rate– Limited data in the developing countries – 25%

mortalityVascular Responses to Pathogen, 2003

Introduction

• Sepsis – 7-fold increase in hospital stay– Therapeutic priorities:

• Early initiation of supportive care• Distinguish sepsis from SIRS

– The early administration of fluids and antibiotics is the cornerstone of management

– RECOGNIZE, RESUSCITATE AND REFER

RECOGNIZE!Diagnostic Criteria for Sepsis, Severe Sepsis and Septic Shock

Adapted from Levy MM, Fink MP, Marshall JC, et al: 2001 SCCM/ESICM/ACCP/ATS/SIS Interna tional Sepsis Definitions Conference. Crit Care Med 2003; 31:1250–1256

Clinical Manifestations

Diagnostic Criteria for Sepsis, Severe Sepsis and Septic Shock

Adapted from Levy MM, Fink MP, Marshall JC, et al: 2001 SCCM/ESICM/ACCP/ATS/SIS Interna tional Sepsis Definitions Conference. Crit Care Med 2003; 31:1250–1256

Pathophysiology

Organ Failure

Redefining Sepsis and Septic Shock

• Sepsis is defined as life-threatening organ dysfunction caused by:

• dysregulated host response to infection.– the primacy of the non-homeostatic host

response to infection, – the potential lethality that is considerably in

excess of a straightforward infection, and– the need for urgent recognition.

Redefining Sepsis and Septic Shock

Redefining Sepsis and Septic Shock

Sequential (Sepsis-Related) Organ Failure Assessment Score

• Patients with a SOFA score of 2 or more had an overall mortality risk of approximately 10%

• This is greater than the overall mortality rate of 8.1% for ST-segment elevation myocardial infarction.

Redefining Sepsis and Septic Shock

• Depending on a patient’s baseline level of risk, a SOFA score of 2 or greater identified a 2- to 25-fold increased risk of dying compared with patients with a SOFA score less than 2.

Redefining Sepsis and Septic Shock

Seymour CW, Liu V, Iwashyna TJ ,etal. Assessment of clinical criteria for sepsis. JAMA. Doi: 10.1001/jama.2016.0288.

Redefining Sepsis and Septic Shock

• Not a tool for clinical management

• Requires laboratory testing – crea and bilirubin

• Clinically characterize a patient

• Widespread familiarity in the medical community

• Well-validated relationship to mortality risk

Redefining Sepsis and Septic Shock

• Similar predictive validity in out-of-the-hospital, ED, and ward settings

• Provides simple bedside criteria to identify adult patients with suspected infection who are likely to have poor outcomes

• No lab tests

qSOFA (Quick SOFA) CriteriaRespiratory rate > 22/min

Altered mentationSystolic blood pressure < 100 mmHg

Redefining Sepsis and Septic Shock

• The task force suggests that qSOFA criteria be used to:– prompt clinicians to further investigate for organ dysfunction,– to initiate or escalate therapy as appropriate, and to – Consider referral to critical care or increase the frequency of

monitoring, if such actions have not already been undertaken.

qSOFA (Quick SOFA) CriteriaRespiratory rate > 22/min

Altered mentationSystolic blood pressure < 100 mmHg

Redefining Sepsis and Septic Shock

• The 2001 task force definitions described septic shock as:

“a state of acute circulatory failure.”

• subset of sepsis in which underlying circulatory and cellular metabolism abnormalities are profound enough to substantially increase mortality

• Hypotension, lactate levels >4 mmol/L, (vs >2 mmol/L)

Redefining Sepsis and Septic ShockTerminology and International Classification of Disease Coding

Redefining Sepsis and Septic ShockOperationalization of Clinical Criteria Identifying Patients With Sepsis and Septic Shock

• Advantages:– reflects an up-to-date view of pathobiology– offers consistency of terminology to clinical

practitioners, researchers, administrators, and funders.

– The physiologic and biochemical tests required to score SOFA are often included in routine patient care, and scoring can be performed retrospectively.

Redefining Sepsis and Septic Shock

RESUSCITATE!

A. Initial Resuscitation 1. Protocolized, quantitative resuscitation of patients with sepsis-

induced tissue hypoperfusion (defined in this document as hypotension persisting after initial fluid challenge or blood lactate concentration ≥ 4 mmol/L).

2. Goals during the first 6 hrs of resuscitation: a. Central venous pressure 8–12 mm Hg b. Mean arterial pressure (MAP) ≥ 65 mm Hg c. Urine output ≥ 0.5 mL/kg/hr d. Central venous (superior vena cava) or mixed venous oxygen saturation 70%

or 65%, respectively (grade 1C).

3. In patients with elevated lactate levels targeting resuscitation to normalize lactate (grade 2C).

Treatment

B. Screening for Sepsis and Performance Improvement 1. Routine screening of potentially infected

seriously ill patients for severe sepsis to allow earlier implementation of therapy (grade 1C).

2. Hospital–based performance improvement efforts in severe sepsis (UG).

Treatment

C. Diagnosis 1. Cultures as clinically appropriate before antimicrobial therapy if no

significant delay (> 45 mins) in the start of antimicrobial(s) (grade 1C). At least 2 sets of blood cultures (both aerobic and anaerobic bottles) be obtained before antimicrobial therapy with at least 1 drawn percutaneously and 1 drawn through each vascular access device, unless the device was recently (<48 hrs) inserted (grade 1C).

2. Use of the 1,3 beta-D-glucan assay (grade 2B), mannan and anti-mannan antibody assays (2C), if available and invasive candidiasis is in differential diagnosis of cause of infection.

3. Imaging studies performed promptly to confirm a potential source of infection (UG).

Treatment

D. Antimicrobial Therapy1. Administration of effective intravenous antimicrobials within

the first hour of recognition of septic shock (grade 1B) and severe sepsis without septic shock (grade 1C) as the goal of therapy.

2. Initial empiric anti-infective therapy of one or more drugs that have activity against all likely pathogens (bacterial and/or fungal or viral) and that penetrate in adequate concentrations into tissues presumed to be the source of sepsis (grade 1B). Antimicrobial regimen should be reassessed daily for potential de-escalation (grade 1B).

3. Use of low procalcitonin levels or similar biomarkers to assist the clinician in the discontinuation of empiric antibiotics in patients who initially appeared septic, but have no subsequent evidence of infection (grade 2C).

Treatment

D. Antimicrobial Therapy4. Combination empirical therapy for neutropenic patients with

severe sepsis (grade 2B) and for patients with difficult-to-treat, multidrug- resistant bacterial pathogens such as Acinetobacter and Pseudomonas spp. (grade 2B).

For patients with severe infections associated with respiratory failure and septic shock, combination therapy with an extended spectrum beta-lactam and either an aminoglycoside or a fluoroquinolone is for P. aeruginosa bacteremia (grade 2B).

A combination of beta-lactam and macrolide for patients with septic shock from bacteremic Streptococcus pneumoniae infections (grade 2B).

Empiric combination therapy should not be administered for more than 3–5 days. De-escalation to the most appropriate single therapy should be performed as soon as the susceptibility profile is known (grade 2B).

Treatment

D. Antimicrobial Therapy5. Duration of therapy typically 7–10 days; longer

courses may be appropriate in patients who have a slow clinical response, undrainable foci of infection, bacteremia with S. aureus; some fungal and viral infections or immunologic deficiencies, including neutropenia (grade 2C).

6. Antiviral therapy initiated as early as possible in patients with severe sepsis or septic shock of viral origin (grade 2C).

7. Antimicrobial agents should not be used in patients with severe inflammatory states determined to be of noninfectious cause (UG).

Treatment

E. Source Control 1. A specific anatomical diagnosis of infection requiring

consideration for emergent source control be sought and diagnosed or excluded as rapidly as possible, and intervention be undertaken for source control within the first 12 hrs after the diagnosis is made, if feasible (grade 1C).

2. When infected peripancreatic necrosis is identified as a potential source of infection, definitive intervention is best delayed until adequate demarcation of viable and nonviable tissues has occurred (grade 2B).

3. If intravascular access devices are a possible source of severe sepsis or septic shock, they should be removed promptly after other vascular access has been established (UG).

Treatment

F. Infection Prevention – Selective oral decontamination and selective

digestive decontamination should be introduced and investigated as a method to reduce the incidence of ventilator-associated pneumonia(grade 2B).

– Oral chlorhexidine gluconate be used as a form of oropharyngeal decontamination to reduce the risk of ventilator-associated pneumonia in ICU patients with severe sepsis (grade 2B).

Treatment

Treatment: Hemodynamic Support and Adjunctive Therapy

G. Fluid Therapy of Severe Sepsis 1. Crystalloids as the initial fluid of choice in the resuscitation of

severe sepsis and septic shock (grade 1B). 2. Against the use of hydroxyethyl starches for fluid resuscitation of

severe sepsis and septic shock (grade 1B). 3. Albumin in the fluid resuscitation of severe sepsis and septic shock

when patients require substantial amounts of crystalloids (grade2C). 4. Initial fluid challenge in patients with sepsis-induced tissue

hypoperfusion with suspicion of hypovolemia to achieve a minimum of 30 mL/kg of crystalloids (a portion of this may be albumin equivalent). More rapid administration and greater amounts of fluid may be needed in some patients (grade 1C).

5. Fluid challenge technique be applied wherein fluid administration is continued as long as there is hemodynamic improvement either based on dynamic (eg, change in pulse pressure, stroke volume variation) or static (eg, arterial pressure, heart rate) variables (UG).

Treatment

H. Vasopressor Therapy1. Vasopressor therapy initially to target a mean arterial pressure

(MAP) of 65 mm Hg (grade 1C). 2. Norepinephrine as the first choice vasopressor (grade 1B). 3. Epinephrine (added to and potentially substituted for

norepinephrine) when an additional agent is needed to maintain adequate blood pressure (grade 2B).

4. Vasopressin 0.03 units/minute can be added to norepinephrine (NE) with intent of either raising MAP or decreasing NE dosage (UG).

5. Low dose vasopressin is not recommended as the single initial vasopressor for treatment of sepsis-induced hypotension and vasopressin doses higher than 0.03-0.04 units/minute should be reserved for salvage therapy (failure to achieve adequate MAP with other vasopressor agents) (UG).

Treatment

H. Vasopressor Therapy6. Dopamine as an alternative vasopressor agent to norepinephrine

only in highly selected patients (eg, patients with low risk of tachyarrhythmias and absolute or relative bradycardia) (grade 2C).

7. Phenylephrine is not recommended in the treatment of septic shock except in circumstances where (a) norepinephrine is associated with serious arrhythmias, (b) cardiac output is known to be high and blood pressure persistently low or (c) as salvage therapy when combined inotrope/vasopressor drugs and low dose vasopressin have failed to achieve MAP target (grade 1C).

8. Low-dose dopamine should not be used for renal protection (grade 1A).

9. All patients requiring vasopressors have an arterial catheter placed as soon as practical if resources are available (UG).

Treatment

I. Inotropic Therapy 1. A trial of dobutamine infusion up to 20

micrograms/kg/min be administered or added to vasopressor (if in use) in the presence of:

(a) myocardial dysfunction as suggested by elevated cardiac filling pressures and low cardiac output, or (b) ongoing signs of hypoperfusion, despite achieving adequate intravascular volume and adequate MAP (grade 1C).

2. Not using a strategy to increase cardiac index to predetermined supranormal levels (grade 1B).

Treatment

J. Corticosteroids 1. Not using intravenous hydrocortisone to treat adult septic shock

patients if adequate fluid resuscitation and vasopressor therapy are able to restore hemodynamic stability. In case this is not achievable, we suggest intravenous hydrocortisone alone at a dose of 200 mg per day (grade 2C).

2. Not using the ACTH stimulation test to identify adults with septic shock who should receive hydrocortisone (grade 2B).

3. In treated patients hydrocortisone tapered when vasopressors are no longer required (grade 2D).

4. Corticosteroids not be administered for the treatment of sepsis in the absence of shock (grade 1D).

5. When hydrocortisone is given, use continuous flow (grade 2D).

Treatment

Treatment

“Let’s review the ABCs of resuscitation……”

ISSUES

Early Management•Stabilize respiration

– Supplemental oxygen– Pulse oximetry– Intubation and mechanical ventilation may be

required• Airway protection – encephalopathy and decreased

levels of consciousness

Treatment/Issues

Treatment/Issues

• Pic of ABG

• Assess perfusion– Hypotension - most common indicator

• SBP <90, MAP <70, decrease in SBP >40• Arterial line (Crit Care Med. 2004;32(9):1928)

– Signs of poor end-organ perfusion• Warm, flushed skin – early phase• Cool, tachycardia, obtundation and restlessness• Oliguria and anuria

Treatment/Issues

• Assess perfusion– Elevated lactate:

• >2 mmol/L, with or without hypotension• Good prognostic indicator; >4 mmol/L – poor• Low platelet count, >INR, creatinine and bilirubin

(Crit Care Med. 2015;43(3):567)

Treatment/Issues

• Establish venous access– Central venous access – majority

• Infuse IV fluids, medications and blood products• Laboratory examinations• Hemodynamic monitoring – value is conflicting

– CVP– ScVO2

• PCW – shown not to improve outcome– Helpful guide in fluid resuscitation

(Crit Care Med. 2015;43(3):567)

Treatment/Issues

• Interventions to restore perfusion– Intravenous fluids

• Volume– Optimum is unknown– EGDT – 3-5 liters, later trials showed 2-3 liters– 6 hours – targeted to MAP– WOF: clinical and radiographic evidence of heart failure– Fluid therapy – well-defined boluses eg. 500 ml– Monitoring: volume status, tissue perfusion, blood pressure,

presence or absence of pulmonary edema

(Crit Care Med. 2015;43(3):567)

Treatment/Issues

• Interventions to restore perfusion– Choice of fluids

• Crystalloid vs albumin– SAFE trial – no difference in endpoints– Addition of albumin did not improve survival

• Crystalloid vs hydroxyethyl starch (HES)– 6S trial – HES vs Ringer’s lactate– HES – increased mortality and renal replacement

• Crystalloid vs pentastarch– VISEP – NO difference in 28-day mortality

Treatment/Issues

Thoughts to ponder:

“In our practice, we generally use a crystalloid solution instead of albumin because of lack of

clear benefit and higher cost.”

Treatment/Issues

Thoughts to ponder:

“Giving a sufficient quantity of IV fluids rapidly and targeting the appropriate goal is

more important than the type of fluid chosen”.

Treatment/Issues

Treatment/Issues

• Vasopressors– 2nd-line– IV fluid is preferred for

as long as they improve perfusion with no compromise in gas exchange

– Norepinephrine – agent of choice

Treatment

• Additional therapies – improve CO refractory shock– Inotropic support

• Dobutamine – at high doses can improve contractility on a setting of a decreased peripheral resistance

– Red blood cell • EGDT (<10, 30% hct) vs protocol-based therapy

– conflicting

• Restrictive (<7) vs liberal (<9) – no difference in 28-day mortality

Treatment/ Issues

Crit Care Med. 2008;36(1):296.

Issues

Treatment Goals

• Early goal-directed

• IV fluids within 6 hours• Physiologic targets

– MAP >65, or higher for some subset of patients– Urine output >/= 0.5 ml/kg/hour– Static vs dynamic predictors of fluid responsiveness

– Dynamic parameters being more predictive and consistent– ScvO2 >/= 70– SvO2 >/= 65

• Evidence that supports EGDT

– CVP, ScvO2 – conflicting results• Commonly used in clinical practice• Problem in generalizability to both resource-poor and

resource-rich facilities.

– MAP and urine output– Alternative universal targets

JAMA. 2010;303(8):739

Treatment Goals

• Evidence that supports EGDT

– Lactate clearance• Initial lactate-lactate >2hours/initial lactate x 100• Potential marker for effective resuscitation • Alternative to ScvO2• Others: dynamic parameters

JAMA. 2010;303(8):739

Treatment Goals

• Protocol-directed therapy• Trials:

– ProCESS – no mortality benefit with PDT– ARISE – similar 90-day mortality with traditional

strategy– proMIse – similar 90-day mortality with usual care

• CVP insertion was common in all these trials• Overall better outcomes in all these studies.

Treatment Goals

• Timing and duration– Early administration of fluids is more important;

within 6 hours– 2008 meta-analysis (Crit Care Med. 2008;36(10):2734.)

• mortality benefit (39 versus 57 percent) vs usual care• therapy more than 24 hours after the onset of sepsis found no

difference in mortality (64 versus 58 percent for standard resuscitation, odds ratio 1.16, 95% CI 0.60-2.22).

Treatment Goals

• Control of the septic focus– Identification of the septic focus

– Eradication of infection• Antimicrobial regimen

Treatment Goals

• Additional therapies– Glucocorticoids –

• French trial: Hydrocortisone vs fludrocortisone• Corticus: Hydrocortisone vs placebo• Meta-analysis: low dose(50 mg intravenously every six hours

or 100 mg every eight hours)

– Nutrition – no immune specific– VTE prophylaxis – Intensive insulin therapy - <180, >110– External cooling and antipyretics

Treatment Goals

• Investigational therapies:

– cytokine and toxin inactivation,– hemofiltration– statins– beta blockade

Treatment Goals

• Make sure you did the following:

• RECOGNIZE• qSOFA and SOFA

• RESUSCITATE• ABCs of resuscitation

• Airway, Fluids, Vasopressor, and antibiotics

• REFER• Intensivist/Critical Care Specialist

So when midnight strikes…..