Presentation on theme: "Pediatric Septic Shock PICU Resident Talk Stanford School of Medicine Pediatric Critical Care Medicine June 2010."— Presentation transcript:
Pediatric Septic Shock PICU Resident Talk Stanford School of Medicine Pediatric Critical Care Medicine June 2010
Learning Objectives After this lesson, the participant will be able to: Distinguish the terms SIRS, sepsis & septic shock. List physiologic changes that occur in sepsis and explain how each factor affects O 2 demand/ delivery. Understand the rationale for goal directed therapy in septic shock
Septic Shock Systemic inflammatory response syndrome (SIRS) - The presence of at least two of the following one of which must be abnormal temperature or leukocyte count. - Temperature. >38 or <36. - Tachycardia - Tachypnea - Leukocyte count increased or decreased or > 10% bands. Sepsis - SIRS in the presence of infection. Severe sepsis - Sepsis plus end organ dysfunction i.e. ARDS, renal dysfunction, coagulopathy. Septic shock - Sepsis plush cardiovascular organ dysfunction. Goldstein et al. Pediatr Crit Care Med 2005
Brierley, Carcillo et al. Pediatr Crit Care Med 2009 American College of Critical Care Medicine Hemodynamic Definitions of Shock
Cohen, Nature 2002 Sepsis leads to micro- vascular occlusion, vascular instability, and organ failure through complex interactions between pathogens, immune cells, and the endothelium.
The predominant cause of mortality in adult sepsis is vasomotor paralysis. Parker, et al. Crit Care Med. 1987
Pollack et al. Crit Care Med 1984, 1985 Contrary to adults low cardiac output not low SVR is associated with mortality in septic shock in children.
Maintain and restore airway, oxygenation, and ventilaton Therapeutic endpoints Monitoring Early Intervention in the treatment of septic shock is vital: The first hour in the ED
Therapeutic Endpoints Fluid Resuscitation & Hemodynamic Support Threshold heart-rates Age appropriate perfusion pressure UOP > 1 cc/kg/hr CI> 3.3 and less than 6 L/min/m 2 Scvo 2 >70% Normal perfusion CRT< 2 seconds Normal INR, anion gap, lactate
Hemodynamic Support In the fluid refractory patient begin a peripheral inotrope while establishing central access. If dopamine refractory start epinephrine in cold shock. If dopamine refractory start norepinephrine in warm shock. Goal is normal perfusion and blood pressure.
Consider CI, BP, and SVR when implementing CV support. Low CI Normal blood pressure High SVR Afterload reduction may improve blood flow by increasing ventricular emptying. Nitroprusside (Beware of Cyanide toxicity) Milrinone. Low CI, Low blood pressure Low SVR Norepinephrine can be added to epinephrine to increase DBP and SVR. Once adequate BP is reached dobutamine, or Milrinone can be added to improve CI and Scvo2. High CI Low or normal Blood Pressure Low SVR Norepinephrine, fluid If shock persists consider Vasopressin
Pediatric Septic Shock Algorithm Brierley, Carcillo et al. Pediatr Crit Care Med 2009