Sepsis Definition Update Needed: Expert Opinion
- A revised operational definition for sepsis could lead to improved patient outcomes by allowing health care providers to concentrate on severely ill individuals, according to experts.
- Michael Klompas and Chau Rhee noted that sepsis is generally defined in two ways: as "life-threatening organ dysfunction caused by a dysregulated host response to infection" and as...
- Klompas and Rhee suggest modifying operational definitions of sepsis to identify patients where short antibiotic delays correlate with increased mortality.This, they argue, will focus sepsis...
Experts Call for Modification to Sepsis Definition for Better Patient Outcomes
Updated June 04, 2025
A revised operational definition for sepsis
could lead to improved patient outcomes by allowing health care providers to concentrate on severely ill
individuals, according to experts. Such a change could also aid in antibiotic stewardship efforts.
Drs. Michael Klompas and Chau Rhee noted that sepsis is generally defined in two ways: as “life-threatening organ
dysfunction caused by a dysregulated host response to infection” and as “suspected infection, at least two
systemic inflammatory response signs, and acute organ dysfunction.”

Sepsis is “a life-threatening organ dysfunction caused by a dysregulated host response to infection,” but experts
say that some patients don’t actually have sepsis — they have symptoms that mimic sepsis.
Image: Adobe Stock
Klompas and Rhee suggest modifying operational definitions of sepsis
to identify patients where short antibiotic delays correlate with increased mortality.This, they argue, will
focus sepsis care “where it is needed” and enhance the validity of sepsis quality measures.
Klompas,an infectious disease physician at Brigham and Women’s Hospital,discussed sepsis guidance and proposed
changes.
“Clinicians have been trained to treat all patients with possible sepsis immediately, aggressively and uniformly
with broad-spectrum antibiotics,” Klompas and Rhee wrote. “Evidence continues to mount, however, that
immediate antibiotics are only critical for patients with septic shock or multiorgan dysfunction, while patients
with single organ dysfunction without shock can safely tolerate short delays until antibiotics. This allows time
to clarify whether these patients are infected or not.”
“Our concern is that in practice these operational criteria identify patients with a very wide spectrum of
illness, some of whom are indeed critically ill and really need immediate care, but also many patients with
milder illness who do not need antibiotics immediately,” klompas said.
Klompas added that about one-third of patients treated for possible sepsis have nonbacterial infections or
noninfectious conditions mimicking sepsis, exposing them to antibiotic risks without potential benefits. He
believes overtreatment stems from pressure to treat all possible sepsis cases rapidly, leaving insufficient time
to determine the presence and nature of infection.
“The term sepsis should be reserved for patients with infections in whom delays in antibiotics are associated
with increased mortality. Other patients should not be labeled as having sepsis,” Klompas said.
What’s next
While infectious disease, emergency medicine, hospitalist, pharmacy, and infection control professional societies
largely agree that current sepsis recommendations are too broad, critical care and pulmonary societies favor a
more inclusive approach. Further consensus-building is needed among all stakeholders.
