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Home / Clinical Laboratory Diagnostic Products and Solutions / Hematology / Monocyte Distribution Width

Monocyte Distribution Width

Severity of infection biomarker

Monocyte Distribution Width (MDW),  proprietary to Beckman Coulter analyzers, is the only regulatory-cleared hematological biomarker that helps to establish severity of infection and risk of sepsis in adult patients in the emergency department. MDW is a measure of increased morphological variability of monocytes in response to bacterial, viral or fungal infections.

MDW is reported automatically as part of a routine CBC with Differential test on the DxH 900 and DxH 690T hematology analyzers using the Early Sepsis Indicator (ESId) application*, which enables automatic reporting with no workflow changes or need to order an additional test.

This product may not be available in your country or region at this time. Please contact your Beckman Coulter sales representative or distributor for more information.
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Regulatory-Cleared

MDW, proprietary to Beckman Coulter analyzers, is the only regulatory-cleared hematological biomarker that helps to establish severity of infection and risk of sepsis in adult patients in the ED.

Available Early

MDW helps reduce diagnostic uncertainty. It is available early to help clinicians escalate or de-escalate care in patients with suspected infectious etiology.

CBC Diff

MDW is available early in patient assessments as part of CBC with Differential tests—no need to order additional tests.

By including MDW in our thought process, we can potentially uncover an underlying sepsis that could have been otherwise missed, especially when other causes can explain a patient’s symptoms.
Nima Sarani, M.D.
University of Kansas Medical Center
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Diagnostic Uncertainty

Clinicians are faced with time pressures to make early risk stratification decisions for patient disposition and treatment initiation. Clinicians must triage patients and quickly determine where they need to go. In many cases, the patients may be discharged home or, perhaps, missed to taken ICU, but rather to the general ward – and both scenarios are associated with increased mortality - higher mortality in patients discharged to the general ward (42.7%) or home (61.6%) vs. ICU (29.5%).2-3 Initial disposition home of emergency department patients with potential sepsis results in twice the mortality and 4x healthcare costs per patient.1 

Diagnostic uncertainty is a major challenge for patients presenting to the emergency department with a low number of signs and symptoms. Over 30% of septic shock patients that present with vague symptoms may be missed by the EMR alerts, encounter longer time to antibiotics, and experience worse outcomes.4

Mitigate Diagnostic Uncertainty

MDW is available early in-patient assessment to help determine patient acuity and risk of sepsis.

Monocyte Distribution Width npv-ppv-graph 

What Makes MDW Unique?

  • Monocyte Activation is a common physiological signal in severe infection and sepsis
  • MDW is backed by rigorously designed patient trials and several rounds of in-depth review to meet the standards required for FDA-clearance and CE mark
  • MDW has been studied for the past decade with more than 15 peer-review publications and over 11,000 patients6-15, confirming the robustness and reproducibility of MDW performance in different patient populations
  • MDW helps reduce diagnostic uncertainty. It is available early to enhance the initial risk assessment and potentially shift your clinical decision point helping clinicians escalate or de-escalate care
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Navigating the uncertainties of sepsis and severe infection is challenging. In this short training video, Dr. Tobin Efferen shares the fundamentals of MDW and explains the clinical utility of incorporating the MDW biomarker as part of the CBC-diff early in ED screening to aid in identifying severity of infection and risk of sepsis.

MDW Patient Case Studies

MDW has been studied for the past decade with more than 16 peer-review publications and over 21,000+ patients6-16, confirming the robustness and reproducibility of MDW performance in different patient populations. Learn more about MDW by reviewing the patient case studies below.
Avoiding Unnecessary Administration of Antibiotics

Avoiding Unnecessary Administration of Antibiotics

See how the inclusion of MDW in patient assessment helped clinician avoid unnecessary of antibiotics.

View case study
Decreased Probability of Sepsis Diagnosis

Identifying a Decreased Probability of Sepsis Diagnosis

Inclusion of MDW in the patient assessment helped clinicians understand the decreased probability of sepsis, which avoided administration of a broad-spectrum antibiotic and its adverse effects.

View case study
MDW-Spotlight-600x300

T-47 Minutes to Antibiotics Administration

MDW biomarker identified a risk of severe infection and reclassified the patient into higher acuity category in conjunction with current standard of care.

View case study
MDW-patient-case-study-600x300

Abnormal MDW 27.3 Changed Patient’s Trajectory

The inclusion of MDW in the clinical thought process helped physicians to uncover an underlying infection which could have otherwise been missed leading to inappropriate therapeutic interventions.

View case study

Sepsis Diagnosis: Saving 85 Minutes to Start Abx

Learn how elevated MDW along with clinical correlation prompted a sepsis diagnosis and helped eliminate 85 minutes of source control, allowing for prompt antibiotic administration.

View case study

 

Additional Resources

BLOG What is Monocyte Distribution Width?

A large unmet clinical need for the early detection of sepsis exists. MDW is a novel, FDA-cleared biomarker intended to meet this need.

Sepsis detection in the emergency department

Peer-Reviewed Clinical Study MDW Improves SIRS and qSOFA Early Sepsis Detection in the Emergency Department

New analysis from a pivotal study shows that patients with abnormal MDW values at presentation have increased odds of sepsis.

Emergency department physician

Early Sepsis Indicator Application Available on These Analyzers

DxH 900 hematology analyzer

DxH 900 Hematology Analyzer

Obtain the right results the first time, while also streamlining processes to maximize staff time.

Learn more
DxH 690T hematology analyzer

DxH 690T Hematology Analyzer

Enhance workflow and walkaway time with a benchtop unit with capabilities to reduce routine manual tasks.

Learn more

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  1. S. Fernando et al., Emergency Department Disposition Decisions and Associated Mortality and Costs in ICU Patients with Suspected Infection, Crit Care 2018; 22,172. https://doi.org/10.1186/s13054-018-2096-8
  2. E. Rivers et al., Early and Innovative Interventions for Severe Sepsis and Septic Shock: Taking Advantage of a Window of Opportunity, CMAJ 2005; 173(9):1054-65. https://doi.org/10.1503/cmaj.050632 
  3. A. Vijayan et al., Procalcitonin: A Promising Diagnostic Marker for Sepsis and Antibiotic Therapy, Journal of Intensive Care 2017; 5:51. https://doi.org/10.1186/s40560-017-0246-8
  4. M. Filbin et al., Presenting Symptoms Independently Predict Mortality in Septic Shock: Importance of a Previously Unmeasured Confounder, Critical Care Medicine 2018; 46(10), 1592-1599. https://doi.org/10.1097/ccm.0000000000003260 
  5. UniCel DxH 900 Coulter Cellular Analysis System Early Sepsis Indicator (ESId) Application Addendum PN C42014AC April 2020
  6. E. Piva et al., Monocyte Distribution Width (MDW) Parameter as a Sepsis Indicator in Intensive Care Units, Clin Chem Lab Med 2021. https://doi.org/10.1515/cclm-2021-0192 
  7. P. Hausfater et al., Monocyte Distribution Width (MDW) Performance as an Early Sepsis Indicator in the Emergency Department: Comparison with CRP and Procalcitonin in a Multicenter International European Prospective Study, Crit Care 2021; 25, 227. https://doi.org/10.1186/s13054-021-03622-5 
  8. A. Woo et al., Monocyte Distribution Width Compared with C-Reactive Protein and Procalcitonin for Early Sepsis Detection in the Emergency Department, PLoS ONE 2021; 16(4): e0250101. https://doi.org/10.1371/journal.pone.0250101 
  9. H. Lin et al., Clinical Impact of Monocyte Distribution Width and Neutrophil-to-Lymphocyte Ratio for Distinguishing COVID-19 and Influenza from Other Upper Respiratory Tract Infections: A Pilot Study, PLoS ONE 2020 15(11): e0241262. https://doi.org/10.1371/journal.pone.0241262
  10. L. Agnello et al., Monocyte Distribution Width (MDW) as a Screening Tool for Sepsis in the Emergency Department, Clin Chem Lab Med 2020; 58(11):1951-1957. https://doi:10.1515/cclm-2020-0417
  11.  G. Riva et al., Monocyte Distribution Width (MDW) as Novel Inflammatory Marker with Prognostic Significance in COVID‑19 Patients, Scientific Report 2021; 11:12716. https://doi.org/10.1038/s41598-021-92236-6 
  12. Marcos-Morales, A et al., Elevated monocyte distribution width in trauma: An early cellular biomarker of organ dysfunction, Injury 2021; S0020-1383(21):00933-00935. https://doi.org/10.1016/j.injury.2021.11.026 
  13. E. Crouser et al., Monocyte Distribution Width: A Novel Indicator of Sepsis-2 and Sepsis-3 in High-Risk Emergency Department Patients, Critical Care Med 2019; 47:1018-1025. https://doi.org/10.1097/CCM.0000000000003799
  14. E. Crouser et al., Improved Early Detection of Sepsis in the ED with a Novel Monocyte Distribution Width Biomarker, CHEST 2017; 152(3):518-526. https://doi.org/10.1016/j.chest.2017.05.039
  15. A. Ognibene et al., Elevated Monocyte Distribution Width in COVID-19 Patients: The Contribution of the Novel Sepsis Indicator, Clinica Chimica Acta 2020; 509: 22-24. https://doi.org/10.1016/j.cca.2020.06.002
  16. Malinovska, A et al., Monocyte distribution width as part of a broad pragmatic sepsis screen in the emergency department. JACEP Open. 2022; 3:e12679. https://doi.org/10.1002/emp2.12679
 
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