From the Guidelines
Sepsis is a life-threatening condition characterized by organ dysfunction caused by a dysregulated host response to infection.
Definition and Causes
- Sepsis is defined as life-threatening organ dysfunction caused by a dysregulated host response to infection 1.
- The condition is caused by an overwhelming immune response to an infection, which can lead to organ failure and death if left untreated.
- Intra-abdominal infections (IAIs) are a common cause of sepsis, and can be particularly challenging to manage due to the complex anatomy of the abdomen and the presence of a large microbial population 1.
Epidemiology and Risk Factors
- Sepsis is a major global health problem, with an estimated 48.9 million cases and 11 million deaths annually 1.
- Risk factors for sepsis include immune compromise, chronic diseases such as malignancy, and certain patient demographics (e.g. infants, elderly persons, males, Black race) 1.
- The incidence of sepsis is rising due to an aging population and the increasing prevalence of chronic diseases 1.
Clinical Management
- Early recognition and treatment of sepsis are crucial to improving outcomes, and typically involve the use of broad-spectrum antibiotics, supportive care (e.g. vasoactive drugs, mechanical ventilation), and careful monitoring of clinical signs and laboratory data 1.
- The Surviving Sepsis Campaign (SSC) guidelines provide a framework for the management of sepsis, but may not be entirely applicable in low-income settings where resources are limited 1.
From the Research
Definition of Sepsis
- Sepsis is a life-threatening condition that arises from a systemic blood infection, causing one or more organ damage due to the dysregulation of the immune response 2, 3, 4, 5.
- It is a clinical syndrome that results from the dysregulated inflammatory response to infection, leading to organ dysfunction 3.
- Sepsis is defined not only by the presence of an infection but also by organ dysfunction from a dysregulated host response to that infection 4.
Pathophysiology of Sepsis
- The dysregulated inflammatory response to infection leads to organ dysfunction, which can result in morbidity and mortality 3.
- The molecular and cellular pathways involved in sepsis pathogenesis include cytokines, the coagulation cascade, apoptosis, and mitochondrial dysfunction 4.
- Numerous pathways, including proinflammatory and antiinflammatory cytokines, the coagulation cascade, apoptosis, and mitochondrial dysfunction, help determine if a bloodstream infection progresses to sepsis 4.
Diagnosis and Management of Sepsis
- Current established treatments for sepsis include appropriate antimicrobial agents, optimization of intravascular volume, vasopressors, and high-quality supportive care 3.
- Laboratory tests, such as C-reactive protein, procalcitonin, and lactic acid, have been evaluated for their utility in sepsis diagnosis, although none are routinely recommended for that purpose in current clinical practice 4.
- Timely diagnosis is crucial for the outcomes of patients with sepsis and septic shock, and emergency physicians play a critical role in recognizing and beginning emergency treatment of septic patients 5.
Impact of Sepsis
- Sepsis is a major cause of morbidity and mortality in hospitalized patients, with significant financial burden and impact on society 2, 3, 6.
- The incidence of sepsis has increased since the first consensus definitions were established in 1991, and it remains one of the leading causes of mortality worldwide 5.
- Patients who survive severe sepsis are more likely to have permanent organ damage, cognitive impairment, and physical disability 6.