31 Severe Sepsis and Septic Shock Minejima Flashcards
What is the definition of Sepsis?
Systemic Inflammatory Response Syndrome (SIRS) associated with a proven clinically suspected infection
What is Systemic Inflammatory Response Syndrome (SIRS)?
The systemic response to a wide range of stresses. Two or more of the following: 1) Temp > 38 or < 36. 2) HR > 90. 3) RR > 20, or PaCO2 < 32. 4) WBC > 12,000 or < 4,000, or >10% immature bands
What is the definition of “Infection”?
Inflammatory response to microorganisms. Invasion of microorganisms in a normally sterile site. Bacteremia = bacteria in blood
What is the definition of Severe Sepsis?
Severe Sepsis = Sepsis (SIRS + Infection) + Organ dysfunction, hypoperfusion, or hypotension
What is the definition of Septic Shock?
Sepsis with persistent hypotension despite fluid resuscitation; requires vasopressor therapy
What is the definition of Multiple-Organ Dysfunction Syndrome (MODS)?
Presence of altered organ function requiring intervention to maintain homeostasis
What is the etiology of Septic Shock?
Bacteria is the most common cause of septic shock. More Gram (+) cases of septic shock –> increased incidence in pneumonia and in the use of intravascular devices. More Gram (-) cases of death due to sepsis. Bacteremia is not necessary for the development of septic shock
What is the Pathophysiology of Septic Shock?
Inflammation is essential to host response against infection. SIRS results from a dysregulation of the normal responses between proinflammatory and anti-inflammatory mediators. Pro-Inflammatory (TNF-a, IL-1, IL-6, IL-8) > Anti-Inflammatory (IL-1RA, IL-4, IL-10)
What is the cascade of events that occur from infection?
Cytokine release –> inflammatory response (causes both a thrombotic response (coagulopathy) and inhibits fibrinolytic response (fibrin clots form))
What are the signs and symptoms associated with Early Sepsis?
Fever or hypothermia. Rigors, chills. Tachycardia. Tachypnea. Nausea/vomiting. Hyperglycemia. Myalgias. Lethargy, malaise. Proteinuria. Hypoxemia. Leukocytosis. Hyperbilirubinemia
What are the signs and symptoms associated with Late Sepsis?
Lactic acidosis. Oliguria. Leukopenia. DIC. Myocardial depression. Pulmonary edema. Hypotension (shock). Hypoglycemia. Azotemia. Thrombocytopenia. ARDS. GI hemorrhage. Coma
What is Disseminated Intravascular Coagulation (DIC)?
Inappropriate activation of the clotting cascade (increased coagulation, decreased fibrinolysis) –> microvascular thrombi
What is Acute Respiratory Distress Syndrome (ARDS)?
Loss of functional alveolar volume, impaired pulmonary compliance, profound hypoxemia
What are the results of Multiple Organ Failure?
As the number of failing organs rise from 2 to 5, mortality increased from 54% to 100%
What are the markers of Organ Dysfunction?
CNS (altered consciouness, confusion, psychosis). Respiratory (tachypnea, PaO2 < 70, SaO2 < 90%, PaO2/FiO2 < 250). Renal (oliguria ( 2)). Hepatic (jaundice, high bilirubin (> 2), high LFTs, low albumin). GI (ileus, GI bleed, acute pancreatitis, high amylase). Cardiovascular (tachycardia, hypotension, high CVP, high PAOP). Metabolic (Hyperglycemia, acidosis, high lactate, decreased lactate clearance). Hematological (low platelets ( 1.5, High aPTT, high D-dimer, low protein C)
What is the Goal in the management of Sepsis?
Routine screening of seriously ill patients for severe sepsis to allow earlier implementation of therapy and improve outcomes. Hospital based performance improvement efforts in severe sepsis
What should be done for the identification of causative infection?
Obtain blood cultures BEFORE antimicrobial therapy is initiated. Blood cultures (at least 2 sets, from different sites). Culture other sites as indicated. Perform 1,3 beta-D-glucan assay, mannan, and anti-mannan Ab assay if available and fungal infection is in differential. Perform necessary imaging studies to determine site of infection
What is the outline for the initiation of empiric antibiotics?
Initiate antibiotics within the first hour of recognition of severe sepsis or septic shock. Include one or more drugs with activity against all likely pathogens (broad coverage). Should penetrate in adequate concentrations into the presumed source of sepsis. Reassess antimicrobial regimen on daily basis. Recently used antibiotics should be avoided. Suggest combination therapy. Combination therapy should not be administered for more than 3-5 days when used empirically (de-escalate to most appropriate single therapy as soon as susceptibility profile is known)
What is Source Control like for Septic Shock?
Specific anatomic diagnosis of infection should be diagnosed or excluded within the first 6 hours. Evaluate for the presence of a focus of infection (drainage of abscess, debridement of necrotic tissue, removal of infected device)