Tuesday, 16 June 2015

Sepsis

Sepsis (/ˈsɛpsɨs/) is whole-body inflammation caused by an infection.[1] Common signs and symptoms include fever, increased heart rate, increased breathing rate, and confusion.[2] There may also be symptoms related to a specific infection such as a cough with pneumonia or painful urination, with a kidney infection. In the very young, old, and people with a weakened immune system, there may be no symptoms of a specific infection and the body temperature may be low or normal rather than high.[3] Severe sepsis is sepsis causing poor organ function or insufficient blood flow. Insufficient blood flow may be evident by low blood pressure, high blood lactate, or low urine output. Septic shock is low blood pressure due to sepsis that does not improve after reasonable amounts of intravenous fluids are given.[1]
Sepsis is caused by an immune response triggered by an infection.[3][4] The infection is most commonly by bacteria, but can also be by fungi, viruses, or parasites.[3] Common locations for the primary infection include: lungs, brain, urinary tract, skin, and abdominal organs. Risk factors include young or old age, a weakened immune system from conditions such as cancer or diabetes, and major trauma or burns.[2] Diagnosis is based on meeting at least two systemic inflammatory response syndrome (SIRS) criteria due to a presumed infection. Blood cultures are recommended preferably before antibiotics are started; however, infection of the blood is not required for the diagnosis.[3] Medical imaging should be done looking for the possible location of infection.[1] Other potential causes of similar signs and symptoms include: anaphylaxis, adrenal insufficiency, low blood volume, heart failure, and pulmonary embolism among others.[3]
Sepsis is usually treated with intravenous fluids and antibiotics. This is often done in an intensive care unit. If fluid replacement is not enough to maintain blood pressure, medications that raise blood pressure can be used. Mechanical ventilation and dialysis may be needed to support the function of the lungs and kidneys, respectively.[2] To guide treatment, a central venous catheter and an arterial catheter may be placed. Other measurements such as cardiac output and superior vena cava oxygen saturation may also be used. People with sepsis need preventive measures for deep vein thrombosis, stress ulcers and pressure ulcers, unless other conditions prevent such interventions. Some might benefit from tight control of blood sugar levels with insulin.[1] The use of corticosteroids is controversial.[5] Activated drotrecogin alfa, originally marketed for severe sepsis, has not been found to be helpful, and was withdrawn from sale in 2011.[6]
Disease severity partly determines the outcome with the risk of death from sepsis being as high as 30%, severe sepsis as high as 50%, and septic shock as high as 80%.[7] The total number of cases worldwide is unknown as there is little data from the developing world.[7] Estimates suggest sepsis affects millions of people a year.[1] In the developed world about 0.2 to 3 per 1000 people gets sepsis yearly or about a million cases per year in the United States.[7][8] Rates of disease have been increasing.[1] Sepsis is more common among males than females.[3] The terms septicemia and blood poisoning referred to the microorganisms or their toxins in the blood and are no longer commonly used.[9][10] The condition has been described at least since the time of Hippocrates.[10]


Signs and symptoms[edit]

Charlotte Cleverley-Bisman, with sepsis from a meningococcal bloodstream infection.
In addition to symptoms related to the provoking cause, sepsis is frequently associated with either fever or low body temperature, rapid breathing, elevated heart rate, confusion, and edema.[11] Early signs are a fast heart rate, decreased urination, and high blood sugar, while signs of established sepsis are confusion, metabolic acidosis, which may be accompanied by faster breathing leading to a respiratory alkalosis, low blood pressure, decreased systemic vascular resistance, higher cardiac output, and dysfunctions of blood coagulation (where clotting can lead to organ failure).[12]
Sepsis may also lead to a drop in blood pressure, resulting in shock. This may result in light-headedness. Bruising or intense bleeding may also occur.[13]

Cause[edit]

The most common primary sources of infection resulting in sepsis are the lungs, the abdomen, and the urinary tract.[14] Typically, 50% of all sepsis cases start as an infection in the lungs. No definitive source is found in one third to one half of cases.[14]
The infectious agents are usually bacteria but can also be fungi or viruses.[14] While gram-negative bacteria were previously the most common cause of sepsis, in the last decade gram-positive bacteria, most commonly staphylococci, are thought to cause more than 50% of cases of sepsis.[15] Other commonly implicated bacteria include Streptococcus pyogenes, Escherichia coli, Pseudomonas aeruginosa, and Klebsiella species.[16] Fungal sepsis accounts for approximately 5% of severe sepsis and septic shock cases; the most common cause of fungal sepsis is infection by Candida species of yeast.[17]

Diagnosis[edit]

Systemic inflammatory response syndrome[18]
FindingValue
Temperature<36 °C (96.8 °F) or >38 °C (100.4 °F)
Heart rate>90/min
Respiratory rate>20/min or PaCO2<32 mmHg (4.3 kPa)
WBC<4x109/L (<4000/mm³), >12x109/L (>12,000/mm³), or 10% bands
Early diagnosis is necessary to properly manage sepsis, as initiation of early goal directed therapy is key to reducing mortality from severe sepsis.[1]
Within the first three hours of suspected sepsis, diagnostic studies should include WBCs, measuring serum lactate and obtaining appropriate cultures before starting antibiotics, so long as this does not delay their use by more than 45 minutes.[1] To identify the causative organism(s), at least two sets of blood cultures using bottles with media for aerobic and anaerobic organisms should be obtained, with at least one drawn through the skin and one drawn through each vascular access device (such as an IV catheter) in place more than 48 hours.[1] However, bacteria are present in the blood in only about 30% of cases.[19] Another possible method of detection is by polymerase chain reaction. If other sources of infection are suspected, cultures of these sources, such as urine, cerebrospinal fluid, wounds, or respiratory secretions, should also be obtained, as long as this does not delay the use of antibiotics.[1]
Within six hours, if blood pressure remains low despite initial fluid resuscitation of 30 ml/kg, or if initial lactate is ≥ 4 mmol/L (36 mg/dL), central venous pressure and central venous oxygen saturation should be measured.[1] Lactate should be re-measured if the initial lactate was elevated.[1] Within twelve hours, it is essential to diagnose or exclude any source of infection that would require emergent source control, such as necrotizing soft tissue infection, infection causing inflammation of the abdominal cavity lining, infection of the bile duct, or intestinal infarction.[1] A pierced internal organ (free air on abdominal x-ray or CT scan; an abnormal chest x-ray consistent with pneumonia (with focal opacification); or petechiae, purpura, or purpura fulminans can also be evident of infection.

Definitions[edit]

According to the American College of Chest Physicians and the Society of Critical Care Medicine, there are different levels of sepsis:[9]

End-organ dysfunction[edit]

Examples of end-organ dysfunction include the following:[21]
More specific definitions of end-organ dysfunction exist for SIRS in pediatrics.[24]
Consensus definitions, however, continue to evolve, with the latest expanding the list of signs and symptoms of sepsis to reflect clinical bedside experience.[11]

Biomarkers[edit]

A 2013 systematic review and meta-analysis concluded moderate-quality evidence exists to support use of the procalcitonin level as a method to distinguish sepsis from non-infectious causes of SIRS.[19] The same review found the test's sensitivity to be 77% and the specificity to be 79%. The authors suggested procalcitonin may serve as a helpful diagnostic marker for sepsis, but cautioned that its level alone cannot definitively make the diagnosis.[19] A 2012 systematic review found that soluble urokinase-type plasminogen activator receptor (SuPAR) is a nonspecific marker of inflammation and does not accurately diagnose sepsis.[25] However, this same review concluded that SuPAR has prognostic value as higher SuPAR levels are associated with an increased rate of death in those with sepsis.[25]

Differential diagnosis[edit]

The differential diagnosis for sepsis is broad and has to look at (to exclude) the noninfectious conditions that can cause the systemic signs of SIRS: alcohol withdrawal, acute pancreatitis, burns, pulmonary embolus, thyrotoxicosis, anaphylaxis, adrenal insufficiency, and neurogenic shock.[12][26]

Neonatal sepsis[edit]

In common clinical usage, neonatal sepsis refers to a bacterial blood stream infection in the first month of life, such as meningitis, pneumonia, pyelonephritis, or gastroenteritis,[27] but neonatal sepsis can also be due to infection with fungi, viruses, or parasites.[27] Criteria with regard to hemodynamic compromise or respiratory failure are not useful because they present too late for intervention.

Pathophysiology[edit]

Sepsis is caused by a combination of factors related to the particular invading pathogen(s) and to the status of the host's immune system.[28] The early hyperinflammatory phase of sepsis (which can sometimes result in a cytokine storm) can be followed by a prolonged period of immunosuppression.[29] Either of these phases can prove fatal.

Microbial factors[edit]

Bacterial virulence factors such as glycocalyx and various adhesins allow colonization, immune evasion, and establishment of disease in the host.[28] Sepsis caused by gram-negative bacteria is thought to be largely due to the host's response to the lipid A component of lipopolysaccharide, also called endotoxin.[30][31] Sepsis caused by gram-positive bacteria can result from an immunological response to cell wall lipoteichoic acid.[32] Bacterial exotoxins that act as superantigens can also cause sepsis.[28] Superantigens simultaneously bind major histocompatibility complex and T-cell receptors in the absence of antigen presentation. This forced receptor interaction induces the production of pro-inflammatory chemical signals (cytokines) by T-cells.[28]
There are a number of microbial factors which can cause the typical septic inflammatory cascade. An invading pathogen is recognized by its pathogen-associated molecular patterns (PAMPs). Examples of PAMPs include lipopolysaccharides and flagellin in gram-negative bacteria, muramyl dipeptide in the peptidoglycan of the gram-positive bacterial cell wall, and CpG bacterial DNA. These PAMPs are recognized by the innate immune system's pattern recognition receptors (PRRs), which can be membrane-bound or cytosolic.[33] There are four families of PRRs: the toll-like receptors, the C-type lectin receptors, the NOD-like receptors and the RIG-I-like receptors. The association of a PAMP and a PRR will invariably cause a series of intracellular signalling cascades. Consequentially, transcription factors like nuclear factor-kappa B and activator protein-1 will up-regulate the expression of pro-inflammatory and anti-inflammatory cytokines.[34]

Host factors[edit]

Cytokines such as tumor necrosis factor, interleukin 1, and interleukin 6 can activate procoagulation factors in the cells lining blood vessels, leading to endothelial damage. The damaged endothelial surface inhibits anticoagulant properties as well as increases antifibrinolysis, which can lead to intravascular clotting, the formation of blood clots in small blood vessels, and multiple organ failure.[35]
A systemic inflammatory response syndrome can also occur in patients without the presence of infection, for example in those with burns, polytrauma, or the initial state in pancreatitis and chemical pneumonitis.[9] The low blood pressure seen in those with sepsis is the result of various processes including excessive production of chemicals that dilate blood vessels such as nitric oxide, a deficiency of chemicals that constrict blood vessels such as vasopressin, and activation of ATP-sensitive potassium channels.[36] In those with severe sepsis and septic shock, this sequence of events leads to a type of circulatory shock known as distributive shock.[37]

Management[edit]

Early recognition and focused management can improve the outcomes in sepsis. Current professional recommendations include a number of actions ("bundles") to be taken as soon as possible after diagnosis. Within the first three hours someone with sepsis should have received antibiotics, and intravenous fluids if there is evidence of either low blood pressure or other evidence for inadequate blood supply to organs (as evidenced by a raised level of lactate); blood cultures should also be obtained within this time period. After six hours the blood pressure should be adequate, close monitoring of blood pressure and blood supply to organs should be in place, and the lactate should be measured again if it was initially raised.[1] A related bundle, the "sepsis six", is in widespread use in the United Kingdom; this requires the administration of antibiotics within an hour of recognition, blood cultures, lactate and hemoglobin determination, urine output monitoring, high-flow oxygen, and intravenous fluids.[38][39]
Apart from the timely administration of fluids and antibiotics, the management of sepsis also involves surgical drainage of infected fluid collections, and appropriate support for organ dysfunction. This may include hemodialysis in kidney failure, mechanical ventilation in lung dysfunction, transfusion of blood products, and drug and fluid therapy for circulatory failure. Ensuring adequate nutrition—preferably by enteral feeding, but if necessary by parenteral nutrition—is important during prolonged illness.[1] In those with high blood sugar levels, insulin to bring it down to 7.8-10 mmol/L (140–180 mg/dL) is recommended with lower levels potentially worsening outcomes.[40] Medication to prevent deep vein thrombosis and gastric ulcers may also be used.[1]

Antibiotics[edit]

In severe sepsis and septic shock, broad-spectrum antibiotics (usually two or a β-lactam antibiotic with broad coverage) are recommended within 1 hour of making the diagnosis.[1][37] For every hour delay in the administration of antibiotics, there is an associated 6% rise in mortality.[20] Several factors determine the most appropriate choice for the initial antibiotic regimen. These factors include local patterns of bacterial sensitivity to antibiotics, whether the infection is thought to be a hospital or community-acquired infection, and which organ systems are thought to be infected.[37] Antibiotic regimens should be reassessed daily and narrowed if appropriate.[1] Treatment duration is typically 7–10 days with the type of antibiotic used directed by the results of cultures.[41]

Intravenous fluids[edit]

Intravenous fluids are titrated (measured and adjusted) in response to heart rate, blood pressure, and urine output; restoring large fluid deficits can require 6 to 10 liters of crystalloids.[28] In cases of severe sepsis and septic shock where a central venous catheter is used to measure blood pressures dynamically, fluids should be administered until the central venous pressure (CVP) reaches 8–12mmHg.[36] Once these goals are met, the central venous oxygen saturation (ScvO2), i.e., the oxygen saturation of venous blood as it returns to the heart as measured at the vena cava, is optimized. If the ScvO2 is less than 70%, blood maybe given to reach a hemoglobin of 10 g/dL and then inotropes are added until the ScvO2 is optimized.[28] In those with acute respiratory distress syndrome (ARDS) and sufficient tissue blood fluid, more fluids should be given carefully.[1]
Crystalloid solutions are recommended initially.[1] Crystalloid solutions and albumin are better than other fluids (such as hydroxyethyl starch) in terms of risk of death.[42] Starches also carry an increased risk of acute kidney injury,[43][44] and need for blood transfusion.[45][46] Various colloid solutions (such as modified gelatin) carry no advantage over crystalloid.[43] Albumin also appears to be of no benefit over crystalloids.[47] Packed red blood cells are recommended to keep the hemoglobin levels between 70 and 90 g/L.[1] A 2014 trial; however, found no difference between a target hemoglobin of 70 or 90 g/L.[48]

Vasopressors[edit]

If the person has been sufficiently fluid resuscitated but the mean arterial pressure is not greater than 65 mmHg, vasopressors are recommended. Norepinephrine (noradrenaline) is recommended as the initial choice. If a single vasopressor is not enough to raise the blood pressure, epinephrine (adrenaline) or vasopressin may be added. Dopamine is typically not recommended. Dobutamine may be used if heart function is poor or blood flow is insufficient despite sufficient fluid volumes and blood pressure.[1]

Ventilation[edit]

Etomidate is often not recommended as a medication to help with intubation in this situation due to concerns it may lead to poor adrenal function and an increased risk of death.[49][50] The small amount of evidence there is, however, has not found a change in the risk of death with etomidate.[51]
It is recommended that the head of the bed be raised if possible to improve ventilation.[1] Paralytic agents should not be used unless there is ARDS if possible.[1]

Steroids[edit]

The use of steroids in sepsis is controversial.[5] The 2012 Surviving Sepsis Campaign recommends against their use in those with septic shock if intravenous fluids and vasopressors stabilize the person's cardiovascular function.[1] During critical illness, a state of adrenal insufficiency and tissue resistance to corticosteroids may occur. This has been termed critical illness–related corticosteroid insufficiency.[52] Treatment with corticosteroids might be most beneficial in those with septic shock and early severe ARDS, whereas its role in others such as those with pancreatitis or severe pneumonia is unclear.[52] However, the exact way of determining corticosteroid insufficiency remains problematic. It should be suspected in those poorly responding to resuscitation with fluids and vasopressors. ACTH stimulation testing is not recommended to confirm the diagnosis.[52] The method of stopping glucocorticoid drugs is variable, and it is unclear whether they should be slowly decreased or simply abruptly stopped.

Early goal directed therapy[edit]

Early goal directed therapy (EGDT) is an approach to the management of severe sepsis during the initial 6 hours after diagnosis.[41] A step-wise approach should be used, with the physiologic goal of optimizing cardiac preload, afterload, and contractility.[53] It has been found to reduce mortality in those with sepsis.[54]
Urine output is also monitored, with a minimum goal of 0.5 ml/kg/hour. In the original trial, mortality was cut from 46.5% to 30.5%.[53] An appropriate decrease in serum lactate however may be equivalent to SvO2 and easier to obtain.[55]

Newborns[edit]

Neonatal sepsis can be difficult to diagnose as newborns may be asymptomatic.[56] If a newborn shows signs and symptoms suggestive of sepsis, antibiotics are immediately started and are either changed to target a specific organism identified by diagnostic testing or discontinued after an infectious cause for the symptoms has been ruled out.[57]

Other[edit]

Monoclonal and polyclonal preparations of intravenous immunoglobulin (IVIG) do not lower the rate of death in newborns and adults with sepsis.[58] Evidence for the use of IgM-enriched polyclonal preparations of IVIG is inconsistent.[58] A 2012 Cochrane review concluded that N-acetylcysteine does not reduce mortality in those with SIRS or sepsis and may even be harmful.[59]
Recombinant activated protein C (drotrecogin alpha) was originally introduced for severe sepsis (as identified by a high APACHE II score), where it was thought to confer a survival benefit.[41] However, subsequent studies showed that it increased adverse events—bleeding risk in particular—and did not decrease mortality.[6] It was removed from sale in 2011.[6]

Prognosis[edit]

Approximately 20–35% of people with severe sepsis and 30–70% of people with septic shock die.[60] Lactate is a useful method of determining prognosis with those who have a level greater than 4 mmol/L having a mortality of 40% and those with a level of less than 2 mmol/L have a mortality of less than 15%.[20]
There are a number of prognostic stratification systems such as APACHE II and Mortality in Emergency Department Sepsis. APACHE II factors in the person's age, underlying condition, and various physiologic variables to yield estimates of the risk of dying of severe sepsis. Of the individual covariates, the severity of underlying disease most strongly influences the risk of death. Septic shock is also a strong predictor of short- and long-term mortality. Case-fatality rates are similar for culture-positive and culture-negative severe sepsis. The Mortality in Emergency Department Sepsis (MEDS) score is simpler and useful in the emergency department environment.[61]
Some people may experience severe long-term cognitive decline following an episode of severe sepsis, but the absence of baseline neuropsychological data in most sepsis patients makes the incidence of this difficult to quantify or to study.[62]

Epidemiology[edit]

Sepsis causes millions of deaths globally each year and is the most common cause of death in people who have been hospitalized.[4][41] The worldwide incidence of sepsis is estimated to be 18 million cases per year.[63] In the United States sepsis affects approximately 3 in 1,000 people,[20] and severe sepsis contributes to more than 200,000 deaths per year.[64]
Sepsis occurs in 1-2% of all hospitalizations and accounts for as much as 25% of ICU bed utilization. Due to it rarely being reported as a primary diagnosis (often being a complication of cancer or other illness), the incidence, mortality, and morbidity rates of sepsis are likely underestimated.[28] A study by the Agency for Healthcare Research and Quality (AHRQ) of selected States found that there were approximately 651 hospital stays per 100,000 population with a sepsis diagnosis in 2010.[65] It is the second-leading cause of death in non-coronary intensive care unit (ICU) patients, and the tenth-most-common cause of death overall (the first being heart disease).[66] Children under 12 months of age and elderly people have the highest incidence of severe sepsis.[28] Among U.S. patients who had multiple sepsis hospital admissions in 2010, those who were discharged to a skilled nursing facility or long term care following the initial hospitalization were more likely to be readmitted than those discharged to another form of care.[65] A study of 18 U.S. States found that, amongst Medicare patients in 2011, septicemia was the second most common principal reason for readmission within 30 days.[67]
Several medical conditions increase a person's susceptibility to infection and developing sepsis. Common sepsis risk factors include age (especially the very young and old); conditions that weaken the immune system such as cancer, diabetes, or the absence of a spleen; and major trauma and burns.[2][68][69]

History[edit]

The term "σeψις"[70] (sepsis) was introduced by Hippocrates in the fourth century BC, and it meant the process of decay or decomposition of organic matter.[71] In the eleventh century, Avicenna used the term "blood rot" for diseases linked to severe purulent process. Though severe systemic toxicity had already been observed, it was only in the 19th century that the specific term – sepsis – was used for this condition.
By the end of the 19th century, it was widely believed that microbes produced substances that could injure the mammalian host and that soluble toxins released during infection caused the fever and shock that were commonplace during severe infections. Pfeiffer coined the term endotoxin at the beginning of the 20th century to denote the pyrogenic principle associated with Vibrio cholerae. It was soon realised that endotoxins were expressed by most and perhaps all gram-negative bacteria. The lipopolysaccharide character of enteric endotoxins was elucidated in 1944 by Shear.[72] The molecular character of this material was determined by Luderitz et al. in 1973.[73]
It was discovered in 1965 that a strain of C3H/HeJ mice were immune to the endotoxin-induced shock.[74] The genetic locus for this effect was dubbed Lps. These mice were also found to be hypersusceptible to infection by gram-negative bacteria.[75] These observations were finally linked in 1998 by the discovery of the toll-like receptor gene 4 (TLR 4).[76] Genetic mapping work, performed over a period of five years, showed that TLR4 was the sole candidate locus within the Lps critical region; this strongly implied that a mutation within TLR4 must account for the lipopolysaccharide resistance phenotype. The defect in the TLR4 gene that led to the endotoxin resistant phenotype was discovered to be due to a mutation in the cytoplasm.[76]

Society and culture[edit]

Economics[edit]

Septicemia was the most expensive condition treated in U.S. hospital stays in 2011, at an aggregate cost of $20.3 billion for nearly 1.1 million hospitalizations.[77] Costs for septicemia stays more than quadrupled since 1997 with an 11.5 percent annual increase.[78] By payer, it was the most costly condition billed to Medicare, the second-most costly billed to Medicaid and the uninsured, and the fourth-most costly billed to private insurance.[77]

Education[edit]

A large international collaboration entitled the "Surviving Sepsis Campaign" was established in 2002[79] to educate people about sepsis and to improve patient outcomes with sepsis. The Campaign has published an evidence-based review of management strategies for severe sepsis, with the aim to publish a complete set of guidelines in subsequent years.[41]

Notes[edit]

  1. ^ "ALI" appears to be no longer used, based on the "Berlin definition"[22][23]

References[edit]

  1. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa Surviving Sepsis Campaign Guidelines Committee including The Pediatric Subgroup; Dellinger, RP; Levy, MM; Rhodes, A et al. (2013). "Surviving Sepsis Campaign: International guidelines for management of severe sepsis and septic shock: 2012". Critical Care Medicine 41 (2): 580–637. doi:10.1097/CCM.0b013e31827e83af. PMID 23353941 – via Surviving Sepsis Campaign. 
  2. ^ a b c d "Sepsis Questions and Answers". cdc.gov. Centers for Disease Control and Prevention (CDC). May 22, 2014. Retrieved 28 November 2014. 
  3. ^ a b c d e f Jui, Jonathan (2011). "Ch. 146: Septic Shock". In Tintinalli, Judith E.; Stapczynski, J. Stephan; Ma, O. John; Cline, David M. et al. Tintinalli's Emergency Medicine: A Comprehensive Study Guide (7th ed.). New York: McGraw-Hill. pp. 1003–14. Retrieved December 11, 2012 – via AccessMedicine. (subscription required (help)). 
  4. ^ a b Deutschman, CS; Tracey, KJ (April 2014). "Sepsis: Current dogma and new perspectives". Immunity 40 (4): 463–75. doi:10.1016/j.immuni.2014.04.001. PMID 24745331. 
  5. ^ a b Patel, GP; Balk, RA (January 15, 2012). "Systemic steroids in severe sepsis and septic shock". American Journal of Respiratory and Critical Care Medicine 185 (2): 133–9. doi:10.1164/rccm.201011-1897CI. PMID 21680949. 
  6. ^ a b c Martí-Carvajal, AJ; Solà, I; Lathyris, D; Cardona, AF (March 14, 2012). Martí-Carvajal, Arturo J., ed. "Human recombinant activated protein C for severe sepsis". Cochrane Database of Systematic Reviews 3: CD004388. doi:10.1002/14651858.CD004388.pub5. PMID 22419295. [needs update]
  7. ^ a b c Jawad, I; Lukšić, I; Rafnsson, SB (June 2012). "Assessing available information on the burden of sepsis: Global estimates of incidence, prevalence and mortality". Journal of Global Health 2 (1): 010404. doi:10.7189/jogh.02.010404 (inactive 2014-11-28). PMC 3484761. PMID 23198133. 
  8. ^ Martin, GS (June 2012). "Sepsis, severe sepsis and septic shock: Changes in incidence, pathogens and outcomes". Expert Review of Anti-infective Therapy 10 (6): 701–6. doi:10.1586/eri.12.50. PMC 3488423. PMID 22734959. 
  9. ^ a b c Bone, R; Balk, R; Cerra, F; Dellinger, R et al. (1992). "Definitions for sepsis and organ failure and guidelines for the use of innovative therapies in sepsis. The ACCP/SCCM Consensus Conference Committee. American College of Chest Physicians/Society of Critical Care Medicine". Chest 101 (6): 1644–55. doi:10.1378/chest.101.6.1644. PMID 1303622. 
  10. ^ a b Angus, DC; van der Poll, T (August 29, 2013). "Severe sepsis and septic shock". The New England Journal of Medicine 369 (9): 840–51. doi:10.1056/NEJMra1208623. PMID 23984731. Lay summary (August 30, 2013). 
  11. ^ a b SCCM/ESICM/ACCP/ATS/SIS; Levy, MM; Fink, MP; Marshall, JC et al. (April 2003). "2001 SCCM/ESICM/ACCP/ATS/SIS International Sepsis Definitions Conference". Critical Care Medicine 31 (4): 1250–6. doi:10.1097/01.CCM.0000050454.01978.3B. PMID 12682500 – via European Society of Intensive Care Medicine (ESICM). 
  12. ^ a b Felner, Kevin; Smith, Robert L. (2012). "Ch. 138: Sepsis". In McKean, Sylvia; Ross, John J.; Dressler, Daniel D.; Brotman, Daniel J. et al. Principles and Practice of Hospital Medicine. New York: McGraw-Hill. pp. 1099–109. ISBN 0071603891. 
  13. ^ MedlinePlus Encyclopedia Sepsis. Retrieved November 29, 2014.
  14. ^ a b c Munford, Robert S.; Suffredini, Anthony F. (2014). "Ch. 75: Sepsis, Severe Sepsis and Septic Shock". In Bennett, John E.; Dolin, Raphael; Blaser, Martin J.. Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases (8th ed.). Philadelphia: Elsevier Health Sciences. pp. 914–34. ISBN 9780323263733. 
  15. ^ Bloch, KC (2010). "Ch. 4: Infectious Diseases". In McPhee, Stephen J.; Hammer, Gary D. Pathophysiology of Disease (6th ed.). New York: McGraw-Hill. Retrieved January 10, 2013 – via AccessMedicine. (subscription required (help)). 
  16. ^ Ramachandran, G (January 2014). "Gram-positive and gram-negative bacterial toxins in sepsis: A brief review". Virulence 5 (1): 213–8. doi:10.4161/viru.27024. PMC 3916377. PMID 24193365. 
  17. ^ Delaloye, J; Calandra, T (January 2014). "Invasive candidiasis as a cause of sepsis in the critically ill patient". Virulence 5 (1): 161–9. doi:10.4161/viru.26187. PMC 3916370. PMID 24157707. 
  18. ^ "American College of Chest Physicians/Society of Critical Care Medicine Consensus Conference: Definitions for sepsis and organ failure and guidelines for the use of innovative therapies in sepsis". Critical Care Medicine 20 (6): 864–74. 1992. doi:10.1097/00003246-199206000-00025. PMID 1597042. 
  19. ^ a b c Wacker, C; Prkno, A; Brunkhorst, FM; Schlattmann, P (May 2013). "Procalcitonin as a diagnostic marker for sepsis: A systematic review and meta-analysis". The Lancet Infectious Diseases 13 (5): 426–35. doi:10.1016/S1473-3099(12)70323-7. PMID 23375419. 
  20. ^ a b c d Soong, J; Soni, N (June 2012). "Sepsis: Recognition and treatment". Clinical Medicine 12 (3): 276–80. doi:10.7861/clinmedicine.12-3-276. PMID 22783783. 
  21. ^ Abraham, E; Singer, M (2007). "Mechanisms of sepsis-induced organ dysfunction". Critical Care Medicine 35 (10): 2408–16. doi:10.1097/01.CCM.0000282072.56245.91. PMID 17948334 – via South African Society of Surgeons in Training (SASSIT). 
  22. ^ Ranieri, VM; Rubenfeld, GD; Thompson, BT; Ferguson, ND et al. (June 2012). "Acute respiratory distress syndrome: The Berlin definition". JAMA 307 (23): 2526–33. doi:10.1001/jama.2012.5669. PMID 22797452. 
  23. ^ "Meet the new ARDS: Expert panel announces new definition, severity classes". PulmCCM. Matthew Hoffman. 
  24. ^ International Consensus Conference on Pediatric Sepsis; Goldstein, B; Giroir, B; Randolph, A (2005). "International Pediatric Sepsis Consensus Conference: Definitions for sepsis and organ dysfunction in pediatrics". Pediatric Critical Care Medicine 6 (1): 2–8. doi:10.1097/01.PCC.0000149131.72248.E6. PMID 15636651. 
  25. ^ a b Backes, Y; van der Sluijs, KF; Mackie, DP; Tacke, F; Koch, A; Tenhunen, JJ; Schultz, MJ (September 2012). "Usefulness of suPAR as a biological marker in patients with systemic inflammation or infection: a systematic review". Intensive Care Medicine 38 (9): 1418–28. doi:10.1007/s00134-012-2613-1. PMC 3423568. PMID 22706919. 
  26. ^ Mayr, FB; Yende, S; Angus, DC (January 2014). "Epidemiology of severe sepsis". Virulence 5 (1): 4–11. doi:10.4161/viru.27372. PMC 3916382. PMID 24335434. 
  27. ^ a b Satar, M; Ozlu, F (September 2012). "Neonatal sepsis: A continuing disease burden". The Turkish Journal of Pediatrics 54 (5): 449–57. PMID 23427506. 
  28. ^ a b c d e f g h Ely, E. Wesley; Goyette, Richert E. (2005). "Ch. 46: Sepsis with Acute Organ Dysfunction". In Hall, Jesse B.; Schmidt, Gregory A.; Wood, Lawrence D.H. Principles of Critical Care (3rd ed.). New York: McGraw-Hill Medical. ISBN 0071416404 – via AccessMedicine. (subscription required (help)). 
  29. ^ Shukla, P; Rao, GM; Pandey, G; Sharma, S et al. (September 5, 2014). "Therapeutic interventions in sepsis: Current and anticipated pharmacological agents". British Journal of Pharmacology 171 (22): 5011–31. doi:10.1111/bph.12829. PMID 24977655. 
  30. ^ Park, BS; Lee, JO (December 2013). "Recognition of lipopolysaccharide pattern by TLR4 complexes". Experimental & Molecular Medicine 45 (12): e66. doi:10.1038/emm.2013.97. PMC 3880462. PMID 24310172. 
  31. ^ Cross, AS (January 2014). "Anti-endotoxin vaccines: Back to the future". Virulence 5 (1): 219–25. doi:10.4161/viru.25965. PMC 3916378. PMID 23974910. 
  32. ^ Fournier, B; Philpott, DJ (July 2005). "Recognition of Staphylococcus aureus by the innate immune system". Clinical Microbiology Reviews 18 (3): 521–40. doi:10.1128/CMR.18.3.521-540.2005. PMC 1195972. PMID 16020688. 
  33. ^ Leentjens, J; Kox, M; van der Hoeven, JG; Netea, MG et al. (June 15, 2013). "Immunotherapy for the adjunctive treatment of sepsis: From immunosuppression to immunostimulation. Time for a paradigm change?". American Journal of Respiratory and Critical Care Medicine 187 (12): 1287–93. doi:10.1164/rccm.201301-0036CP. PMID 23590272. 
  34. ^ Antonopoulou, A; Giamarellos-Bourboulis, EJ (January 2011). "Immunomodulation in sepsis: State of the art and future perspective". Immunotherapy 3 (1): 117–28. doi:10.2217/imt.10.82. PMID 21174562. 
  35. ^ Nimah, M; Brilli, RJ (2003). "Coagulation dysfunction in sepsis and multiple organ system failure". Critical Care Clinics 19 (3): 441–58. doi:10.1016/S0749-0704(03)00008-3 (inactive November 26, 2014). PMID 12848314 – via South African Society of Surgeons in Training (SASSIT). 
  36. ^ a b Marik, PE (June 2014). "Iatrogenic salt water drowning and the hazards of a high central venous pressure". Annals of Intensive Care 2014 (4): 21. doi:10.1186/s13613-014-0021-0. PMC 4122823. PMID 25110606. 
  37. ^ a b c Marik, PE (June 2014). "Early management of severe sepsis: concepts and controversies". Chest 145 (6): 1407–18. doi:10.1378/chest.13-2104). PMID 24889440. 
  38. ^ Daniels, R. (11 March 2011). "Surviving the first hours in sepsis: getting the basics right (an intensivist's perspective)". Journal of Antimicrobial Chemotherapy 66 (Supplement 2): ii11–ii23. doi:10.1093/jac/dkq515. PMID 21398303. 
  39. ^ Scottish Intercollegiate Guidelines Network (SIGN) (May 2014). Guideline 139: care of deteriorating patients. Edinburgh: SIGN. ISBN 978-1-909103-26-9. 
  40. ^ Hirasawa, H; Oda, S; Nakamura, M (September 7, 2009). "Blood glucose control in patients with severe sepsis and septic shock". World Journal of Gastroenterology 15 (33): 4132–6. doi:10.3748/wjg.15.4132. PMC 2738808. PMID 19725146. 
  41. ^ a b c d e Dellinger, RP; Levy, MM; Carlet, JM; Bion, J et al. (January 2008). "Surviving Sepsis Campaign: International guidelines for management of severe sepsis and septic shock: 2008". Intensive Care Medicine 34 (1): 17–60. doi:10.1007/s00134-007-0934-2. PMC 2249616. PMID 18058085. 
  42. ^ Fluids in Sepsis and Septic Shock Group; Rochwerg, B; Alhazzani, W; Sindi, A et al. (September 2014). "Fluid resuscitation in sepsis: A systematic review and network meta-analysis". Annals of Internal Medicine 161 (5): 347–55. doi:10.7326/M14-0178. PMID 25047428. 
  43. ^ a b Perel, P; Roberts, I; Ker, K (2013). "Colloids versus crystalloids for fluid resuscitation in critically ill patients". Cochrane Database of Systematic Reviews (2): CD000567. doi:10.1002/14651858.CD000567.pub6. PMID 23450531. 
  44. ^ Zarychanski, R; Abou-Setta, AM; Turgeon, AF; Houston, BL et al. (February 2013). "Association of hydroxyethyl starch administration with mortality and acute kidney injury in critically ill patients requiring volume resuscitation: A systematic review and meta-analysis". JAMA 309 (7): 678–88. doi:10.1001/jama.2013.430. PMID 23423413. 
  45. ^ Haase, N; Perner, A; Hennings, LI; Siegemund, M et al. (2013). "Hydroxyethyl starch 130/0.38-0.45 versus crystalloid or albumin in patients with sepsis: Systematic review with meta-analysis and trial sequential analysis". BMJ 346: f839. doi:10.1136/bmj.f839. PMC 3573769. PMID 23418281. 
  46. ^ Serpa Neto, A; Veelo, DP; Peireira, VG; de Assunção, MS et al. (February 2014). "Fluid resuscitation with hydroxyethyl starches in patients with sepsis is associated with an increased incidence of acute kidney injury and use of renal replacement therapy: A systematic review and meta-analysis of the literature". Journal of Critical Care 29 (1): 185.e1–7. doi:10.1016/j.jcrc.2013.09.031. PMID 24262273. 
  47. ^ Patel, A; Laffan, MA; Waheed, U; Brett, SJ (July 22, 2014). "Randomised trials of human albumin for adults with sepsis: A systematic review and meta-analysis with trial sequential analysis of all-cause mortality". BMJ 349: g4561. doi:10.1136/bmj.g4561. PMID 25099709. 
  48. ^ TRISS Trial Group; Scandinavian Critical Care Trials Group; Holst, LB; Haase, N et al. (October 9, 2014). "Lower versus higher hemoglobin threshold for transfusion in septic shock". The New England Journal of Medicine 371 (15): 1381–91. doi:10.1056/NEJMoa1406617. PMID 25270275. 
  49. ^ Cherfan, AJ; Arabi, YM; Al-Dorzi, HM; Kenny, LP (May 2012). "Advantages and disadvantages of etomidate use for intubation of patients with sepsis". Pharmacotherapy 32 (5): 475–82. doi:10.1002/j.1875-9114.2012.01027.x. PMID 22488264. 
  50. ^ Chan, CM; Mitchell, AL; Shorr, AF (November 2012). "Etomidate is associated with mortality and adrenal insufficiency in sepsis: A meta-analysis". Critical Care Medicine 40 (11): 2945–53. doi:10.1097/CCM.0b013e31825fec26. PMID 22971586. 
  51. ^ Gu, WJ; Wang, F; Tang, L; Liu, JC (September 25, 2014). "Single-dose etomidate does not increase mortality in patients with sepsis: A systematic review and meta-analysis of randomized controlled trials and observational studies". Chest. doi:10.1378/chest.14-1012. PMID 25255427. 
  52. ^ a b c American College of Critical Care Medicine; Marik, PE; Pastores, SM; Annane, D et al. (2008). "Recommendations for the diagnosis and management of corticosteroid insufficiency in critically ill adult patients: Consensus statements from an international task force by the American College of Critical Care Medicine". Critical Care Medicine 36 (6): 1937–49. doi:10.1097/CCM.0b013e31817603ba. PMID 18496365 – via University of Chicago. 
  53. ^ a b Early Goal-Directed Therapy Collaborative Group; Rivers, E; Nguyen, B; Havstad, S et al. (2001). "Early goal-directed therapy in the treatment of severe sepsis and septic shock". The New England Journal of Medicine 345 (19): 1368–77. doi:10.1056/NEJMoa010307. PMID 11794169. 
  54. ^ Emergency Medicine Shock Research Network (EMShockNet), investigators; Jones, AE; Brown, MD; Trzeciak, S et al. (2008). "The effect of a quantitative resuscitation strategy on mortality in patients with sepsis: A meta-analysis". Critical Care Medicine 36 (10): 2734–9. doi:10.1097/CCM.0b013e318186f839. PMC 2737059. PMID 18766093. 
  55. ^ Emergency Medicine Shock Research Network (EMShockNet), investigators; Jones, AE; Shapiro, NI; Trzeciak, S et al. (February 24, 2010). "Lactate clearance vs central venous oxygen saturation as goals of early sepsis therapy: A randomized clinical trial". JAMA 303 (8): 739–46. doi:10.1001/jama.2010.158. PMC 2918907. PMID 20179283. 
  56. ^ Shane, AL; Stoll, BJ (January 2014). "Neonatal sepsis: progress towards improved outcomes". Journal of Infection 68 (Supplement 1): S24–32. doi:10.1016/j.jinf.2013.09.011. PMID 24140138. 
  57. ^ Camacho-Gonzalez, A; Spearman, PW; Stoll, BJ (April 2013). "Neonatal infectious diseases: evaluation of neonatal sepsis". Pediatric Clinics of North America 60 (2): 367–89. doi:10.1016/j.pcl.2012.12.003. PMID 23481106. 
  58. ^ a b Alejandria, MM; Lansang, MA; Dans, LF; Mantaring, JB 3rd (September 2013). "Intravenous immunoglobulin for treating sepsis, severe sepsis and septic shock". Cochrane Database of Systematic Reviews 9 (CD001090). doi:10.1002/14651858.CD001090.pub2. PMID 24043371. 
  59. ^ Szakmany, T; Hauser, B; Radermacher, P (September 2012). "N-acetylcysteine for sepsis and systemic inflammatory response in adults". Cochrane Database of Systematic Reviews 9 (CD006616). doi:10.1002/14651858.CD006616.pub2. PMID 22972094. 
  60. ^ Russel, JA (October 2008). "The current management of septic shock". Minerva Medica 99 (5): 431–58. PMID 18971911. 
  61. ^ Best Evidence in Emergency Medicine Investigator, Group; Carpenter, CR; Keim, SM; Upadhye, S et al. (October 2009). "Risk stratification of the potentially septic patient in the emergency department: The mortality in the emergency department sepsis (MEDS) score". The Journal of Emergency Medicine 37 (3): 319–27. doi:10.1016/j.jemermed.2009.03.016. PMID 19427752. 
  62. ^ Jackson, JC; Hopkins, RO; Miller, RR; Gordon, SM et al. (November 2009). "Acute respiratory distress syndrome, sepsis, and cognitive decline: A review and case study". Southern Medical Journal 102 (11): 1150–7. doi:10.1097/SMJ.0b013e3181b6a592. PMC 3776422. PMID 19864995. 
  63. ^ Lyle, NH; Pena, OM; Boyd, JH; Hancock, RE (September 2014). "Barriers to the effective treatment of sepsis: antimicrobial agents, sepsis definitions, and host-directed therapies". Annals of the New York Academy of Sciences 1323 (2014): 101–14. doi:10.1111/nyas. PMID 24797961. 
  64. ^ Munford, Robert S. (2011). "Ch. 271: Severe Sepsis and Septic Shock". In Longo, Dan L.; Fauci, Anthony S.; Kasper, Dennis L.; Hauser, Stephen L. et al. Harrison's Principles of Internal Medicine (18th ed.). New York: McGraw-Hill. pp. 2223–231. ISBN 9780071748896. 
  65. ^ a b Sutton, JP; Friedman, B (September 2013). "Trends in Septicemia Hospitalizations and Readmissions in Selected HCUP States, 2005 and 2010". Healthcare Cost and Utilization Project (Statistical Brief #161). Rockville, MD: Agency for Healthcare Research and Quality. PMID 24228290. 
  66. ^ Martin, GS; Mannino, DM; Eaton, S; Moss, M (2003). "The epidemiology of sepsis in the United States from 1979 through 2000". The New England Journal of Medicine 348 (16): 1546–54. doi:10.1056/NEJMoa022139. PMID 12700374. 
  67. ^ Hines, AL; Barrett, ML; Jiang, HJ; Steiner, CA (April 2014). "Conditions with the Largest Number of Adult Hospital Readmissions by Payer, 2011.". Healthcare Cost and Utilization Project (Statistical Brief #172). Rockville, MD: Agency for Healthcare Research and Quality. PMID 24901179. 
  68. ^ Koh, GC; Peacock, SJ; van der Poll, T; Wiersinga, WJ (April 2012). "The impact of diabetes on the pathogenesis of sepsis". European Journal of Clinical Microbiology & Infectious Diseases 31 (4): 379–88. doi:10.1007/s10096-011-1337-4. PMC 3303037. PMID 21805196. 
  69. ^ Rubin, LG; Schaffner, W (July 2014). "Clinical practice. Care of the asplenic patient". The New England Journal of Medicine 371 (4): 349–56. doi:10.1056/NEJMcp1314291. PMID 25054718. 
  70. ^ Vincent, Jean-Louis (2008). "Ch. 1: Definition of Sepsis and Non-infectious SIRS". In Cavaillon, Jean-Marc; Adrie, Christophe. Sepsis and Non-infectious Systemic Inflammation: From Biology to Critical Care. John Wiley & Sons. p. 3. ISBN 9783527319350. 
  71. ^ Marshall, JC (July 2013). "Sepsis: Rethinking the approach to clinical research". Journal of Leukocyte Biology 94 (1): 471–82. doi:10.1189/jlb.0607380. PMID 18171697. 
  72. ^ Shear, MJ (1944). "Chemical treatment of tumors, IX: Reactions of mice with primary subcutaneous tumors to injection of a hemorrhage-producing bacterial polysaccharide". Journal of the National Cancer Institute 4 (5): 461–76. doi:10.1093/jnci/4.5.461. 
  73. ^ Luderitz, O; Galanos, C; Lehmann, V; Nurminen, M et al. (1973). "Lipid A: Chemical structure and biologic activity". The Journal of Infectious Diseases 128: 29. doi:10.1093/infdis/128.Supplement_1.S17. JSTOR 30106029. 
  74. ^ Heppner, G; Weiss, DW (1965). "High susceptibility of strain A mice to endotoxin and endotoxin-red blood cell mixtures". Journal of Bacteriology 90 (3): 696–703. PMC 315712. PMID 16562068. 
  75. ^ O'Brien, AD; Rosenstreich, DL; Scher, I; Campbell, GH et al. (1980). "Genetic control of susceptibility to Salmonella typhimurium in mice: Role of the LPS gene". Journal of Immunology 124 (1): 20–4. PMID 6985638. 
  76. ^ a b Poltorak, A; Smirnova, I; He, X; Liu, M-Y et al. (1998). "Genetic and physical mapping of the Lps locus: Identification of the toll-4 receptor as a candidate gene in the critical region". Blood Cells, Molecules and Diseases 24 (3): 340–55. doi:10.1006/bcmd.1998.0201. PMID 10087992. 
  77. ^ a b Torio, CM; Andrews, RM (August 2013). "National Inpatient Hospital Costs: The Most Expensive Conditions by Payer, 2011". Healthcare Cost and Utilization Project (Statistical Brief #160). Rockville, MD: Agency for Healthcare Research and Quality. PMID 24199255. 
  78. ^ Pfuntner, A; Wier, LM; Steiner, C (December 2013). "Costs for Hospital Stays in the United States, 2011". Healthcare Cost and Utilization Project (Statistical Brief #168). Rockville, MD: Agency for Healthcare Research and Quality. PMID 24455786. 
  79. ^ "History". Surviving Sepsis Campaign. Society of Critical Care Medicine. Retrieved February 24, 2014. 

External links[edit]

General terms
Conditions
Organ system failure
Complications
Diagnosis
Life supporting treatments
Drugs
ICU scoring systems
Physiology
Organisations
Related specialties
Abnormal clinical and laboratory findings for blood tests (R70–R79, 790)
Red blood cells
Size
Shape
Other
Lymphocytes
Small molecules
Nitrogenous
Proteins
Other
Minerals
Pathogens/sepsis
Description
Disease
Treatment
Index of the urinary system
Description
Disease
Treatment

Retrieved from "http://en.wikipedia.org/wiki?title=Sepsis&oldid=158400"
The content on this page originates from Wikipedia and is licensed under the GNU Free Document License or the Creative Commons CC-BY-SA license.

Ads
Beat High Blood Pressure And Reduce Your Risk Of Stroke Or Heart Attack. Urgent New Findings
Sports Supplements High Quality, 100% UK Made & Tested Free UK Delivery. Buy Now
Advertisement
Expand Your Search
Septic Shock
Septicemia
MRSA
Other People Are Asking
What Are The Causes Of Sepsis In Dogs?
What Are All The Causes Of Sepsis?
What Are The Causes And Symptoms Of Sepsis?
How Do Doctors Deal With Sepsis Blood Poisoning?
What Does Sepsis Mean?
Popular Q&A
Q: 
What Are the Causes of Sepsis in Do...
A: 
Identification When a dog has an injury or infection, the immune system releases cells to sterilize the wound or combat infection. This can damage healthy tissu... Read More »
Source: www.ehow.co.uk
Q: 
How to Test for Sepsis
A: 
Test for Sepsis Take inventory of any unusual symptoms and report them to the physician conducting the diagnosis. Obtain a blood test and get counts of red and ... Read More »
Source: www.ehow.co.uk
Q: 
What are all the Causes of sepsis?
A: 
Sorry, we don't yet have an answer to that question. Read More »
Source: www.trueknowledge.com
Related Images
More Related Images »
Advertisement
Posted by at

No comments:

Post a Comment

Subscribe to: Post Comments (Atom)