MINNEAPOLIS — Clinicians often hesitate to call a case of pediatric septic shock, even though they may treat the patient appropriately, according to one critical care physician.
Dr. Jerry McLaughlin presented the case of an alert but ill-appearing 1-year-old with 2 days of fever and vomiting, negative chest x-ray, abnormal urine analysis, capillary refill time of 3 seconds, cool extremities, and a normal respiratory rate, blood pressure, and urine output.
When he asked who would call this case septic shock, only one hand rose up among roughly 75 physicians attending the session at the Pediatric Hospital Medicine 2010 meeting.
“We see patients who look like this all the time, and you don't want to say shock – shock is somebody who's clearly obtunded and needs the ICU and is falling apart – that is not this patient, but she meets criteria and she needs to be treated accordingly,” Dr. McLaughlin said. “The thing is that many of you would treat her appropriately in the first hour and her symptoms would reverse, but you just would never call it. I say this because we need to be speaking the same language.”
Recognition Gap
Although the term “shock” carries with it a certain amount of baggage for medical professionals and families, part of the problem lies in recognition, said Dr. McLaughlin of the department of critical care medicine at Seattle Children's Hospital. He cited a study of 91 infants and children who presented to local community hospitals with septic shock that found community physicians achieved shock reversal in just 26% of patients, and used resuscitation practices consistent with American College of Critical Care Medicine–Pediatric Advanced Life Support (ACCM-PALS) septic shock guidelines in 30% (Pediatrics 2003;112:793–9).
A quick quiz about pediatric sepsis facts at the meeting also suggested some knowledge gaps, with Dr. McLaughlin eliciting an audible gasp when he said that 10 times as many infants develop sepsis compared with older children, and that 10% of the 47,000 pediatric sepsis cases reported each year end in death.
Timing, Timing, Timing
International definitions for sepsis and organ dysfunction have been developed by an expert panel, but many attendees seemed unaware of the specific criteria for each diagnosis on the sepsis continuum (Pediatr. Crit. Care Med. 2005;6:2–8). Still others suggested that the panel's broad definition of sepsis – systemic inflammatory response syndrome (SIRS) plus infection – would encompass a disproportionate number of infants and children in the emergency department.
Just as there are “golden hours” in the treatment of stroke and acute MI, early recognition of septic shock and formulation of a goal-directed therapeutic plan is critical, Dr. McLaughlin stressed at the meeting sponsored by the Society of Hospital Medicine, American Academy of Pediatrics, and Academic Pediatric Association. In the community hospital study, each additional hour of persistent shock from the time of diagnosis was associated with a doubling of the risk of death.
The good news is that physicians don't have to come up with their own plan, but have the 2007 ACCM guidelines, published last year (Crit. Care Med. 2009;37:666–88) to direct their therapies. The five elements central to early management are oxygen, vascular access, fluids, inotropes, and antibiotics.
“If a patient comes in with septic shock and it's clear, don't delay getting labs to do this stuff,” he said. “You all know how long it can take to get a CBC and blood work. Suddenly 40 minutes has passed and the nurses are saying they can't get blood, and that's 40 minutes lost.”
Oxygen delivery is pretty straightforward, with the method typically dependent on patient preference. Access can be achieved intravenously or via an intraosseous line, which is often quicker to achieve.
Fluid therapy is an entirely different matter, with the optimal amount of fluid debated because of concerns that excess fluid can induce pulmonary edema or heart failure in children with septic shock.
“Some people say 20 mL/kg, some say 60 [mL/kg] because that is what the guidelines say, but I can tell you that by the time some of these kids leave me they've already had 200 mL/kg or more,” he said. “You give as much as the patient needs and don't hold back because of fear. If you hold back on fluid, you push up mortality.”
Tackling the Fluid Therapy Question
An audience member said there may be an exception, as research suggests that pushing fluids may actually increase mortality in children who are severely malnourished. Dr. McLaughlin responded that some of the best literature on fluid resuscitation has been published by Dr. Cláudio Oliveira's group in Brazil, a country that has a significant amount of malnutrition and reports higher survival rates in patients receiving early, adequate fluid therapy (Pediatr. Emerg. Care 2008;24:810–5).