Skip to main content
MedVellum
QuestionsVideosPricing

MedVellum

Fellowship exam preparation across every specialty: source-verified topics, questions in every format, and videos.

Product

  • Specialties
  • Questions
  • Videos
  • Exam tools
  • Pricing

Verification & policy

  • Verified register
  • Editorial policy
  • Privacy
  • Terms

Account

  • Sign in
  • Create account
  • Dashboard
  • Account & billing

© 2026 MedVellum. For education only — not a substitute for clinical judgement.

llms.txtPsychiatry LLM catalogSitemap

ICU TopicsResuscitation

ICU · Resuscitation

Disseminated intravascular coagulation (DIC)

Also known as DIC · Consumptive coagulopathy · ISTH DIC score

DIC in the resuscitation setting — the 2025 ISTH definition and overt-DIC score, SIC for sepsis, thrombotic vs haemorrhagic phenotypes, cytokine-driven pathophysiology, transfusion for bleeding (BCSH/ISTH), heparin when thrombosis predominates, antifibrinolytics only for hyperfibrinolytic bleeding (CRASH-2 in trauma), the failed anticoagulant trials, APL and purpura fulminans, and the TTP differential.

medium21 referencesUpdated 8 Oct 202611 min readSource-verified · Oct 2026

Checked against its sources on 8 Oct 2026

Your progress

Saved on this device.

Target exams

CICMFFICMEDIC

Red flags

  • Treatment of the underlying condition is the cornerstone of DIC therapy
  • Transfuse platelets or plasma for bleeding (or before an invasive procedure), not on laboratory results alone
  • In general no antifibrinolytics in DIC — the exception is severe bleeding with a hyperfibrinolytic state (leukaemia, trauma)
  • In bleeding trauma, tranexamic acid works only early — given after 3 h it seemed to increase death due to bleeding (CRASH-2)
  • Suspected TTP needs prompt plasma exchange — ADAMTS13 results may take days
On this page
Study tools

Your progress

Saved on this device.

Target exams

CICMFFICMEDIC

Red flags

  • Treatment of the underlying condition is the cornerstone of DIC therapy
  • Transfuse platelets or plasma for bleeding (or before an invasive procedure), not on laboratory results alone
  • In general no antifibrinolytics in DIC — the exception is severe bleeding with a hyperfibrinolytic state (leukaemia, trauma)
  • In bleeding trauma, tranexamic acid works only early — given after 3 h it seemed to increase death due to bleeding (CRASH-2)
  • Suspected TTP needs prompt plasma exchange — ADAMTS13 results may take days
The one-paragraph exam answer

The 2025 ISTH definition: DIC is "an acquired, life-threatening intravascular disorder characterized by systemic coagulation activation, dysregulated fibrinolysis, and endothelial injury, resulting in microthrombosis", progressing from an early, possibly asymptomatic phase to an advanced phase with haemorrhage and/or organ dysfunction. Diagnose overt DIC with the ISTH score (5 or more, only with an underlying cause) and early sepsis-related DIC with the SIC score (4 or more). Treat the underlying condition — the cornerstone. Transfuse platelets and plasma for bleeding, not numbers; give fibrinogen or cryoprecipitate for persistent fibrinogen under 1 g/L; use therapeutic heparin when thrombosis predominates; avoid antifibrinolytics except for severe bleeding with a hyperfibrinolytic state. Antithrombin, tifacogin, activated protein C and thrombomodulin all missed their mortality endpoints.[1][3][4][11]

Meet the patient

A 60-year-old man with perforated diverticulitis reaches the unit in septic shock — purpura across his shins, blood oozing from cannula sites, a platelet count that has fallen from 288 to 42 overnight, fibrinogen 0.9 g/L and a D-dimer far above the upper normal limit. He is bleeding from puncture sites while his kidneys fail — the two faces of DIC at once.[1]

The two questions that decide his next hour: what is the underlying condition? (treating it is the cornerstone) and is this thrombotic or haemorrhagic DIC? (it decides between heparin and products).[3][1]

ICU Fellowship (CICM) Pro

Continue reading

You have read the opening of this topic. The complete unit — every section and its primary-source references — is part of the ICU Fellowship (CICM) fellowship library.

Sign in to continueSee pricing
References21ShowHide
  1. [1]Iba T, Levy JH, Maier CL, et al. Updated definition and scoring of disseminated intravascular coagulation in 2025: communication from the ISTH SSC Subcommittee on Disseminated Intravascular Coagulation. Journal of thrombosis and haemostasis : JTH, 2025.PMID 40216223
  2. [2]Bakhtiari K, Meijers JC, de Jonge E, et al. Prospective validation of the International Society of Thrombosis and Haemostasis scoring system for disseminated intravascular coagulation. Critical care medicine, 2004.PMID 15599145
  3. [3]Wada H, Thachil J, Di Nisio M, et al. Guidance for diagnosis and treatment of DIC from harmonization of the recommendations from three guidelines. Journal of thrombosis and haemostasis : JTH, 2013.PMID 23379279
  4. [4]Levi M, Toh CH, Thachil J, et al. Guidelines for the diagnosis and management of disseminated intravascular coagulation. British Committee for Standards in Haematology. British journal of haematology, 2009.PMID 19222477
  5. [5]Adelborg K, Larsen JB, Hvas AM Disseminated intravascular coagulation: epidemiology, biomarkers, and management. British journal of haematology, 2021.PMID 33555051
  6. [6]Levy JH, Welsby I, Goodnough LT Fibrinogen as a therapeutic target for bleeding: a review of critical levels and replacement therapy. Transfusion, 2014.PMID 24117955
  7. [7]Rubin RN, Colman RW Disseminated intravascular coagulation. Approach to treatment. Drugs, 1992.PMID 1282866
  8. [8]Warren BL, Eid A, Singer P, et al. Caring for the critically ill patient. High-dose antithrombin III in severe sepsis: a randomized controlled trial. JAMA, 2001.PMID 11597289
  9. [9]Abraham E, Reinhart K, Opal S, et al. Efficacy and safety of tifacogin (recombinant tissue factor pathway inhibitor) in severe sepsis: a randomized controlled trial. JAMA, 2003.PMID 12851279
  10. [10]Ranieri VM, Thompson BT, Barie PS, et al. Drotrecogin alfa (activated) in adults with septic shock. The New England journal of medicine, 2012.PMID 22616830
  11. [11]Vincent JL, Francois B, Zabolotskikh I, et al. Effect of a Recombinant Human Soluble Thrombomodulin on Mortality in Patients With Sepsis-Associated Coagulopathy: The SCARLET Randomized Clinical Trial. JAMA, 2019.PMID 31104069
  12. [12]Sanz MA, Fenaux P, Tallman MS, et al. Management of acute promyelocytic leukemia: updated recommendations from an expert panel of the European LeukemiaNet. Blood, 2019.PMID 30803991
  13. [13]Smith OP, White B, Vaughan D, et al. Use of protein-C concentrate, heparin, and haemodiafiltration in meningococcus-induced purpura fulminans. Lancet (London, England), 1997.PMID 9393338
  14. [14]Rintala E, Kauppila M, Seppälä OP, et al. Protein C substitution in sepsis-associated purpura fulminans. Critical care medicine, 2000.PMID 10921567
  15. [15]Iba T, Nisio MD, Levy JH, et al. New criteria for sepsis-induced coagulopathy (SIC) following the revised sepsis definition: a retrospective analysis of a nationwide survey. BMJ open, 2017.PMID 28963294
  16. [16]Nwagha TU, Hajjaj OI, Levy JH, et al. Global practice and challenges in the diagnosis and management of disseminated intravascular coagulation: communication from the ISTH SSC Subcommittee on Disseminated Intravascular Coagulation. Journal of thrombosis and haemostasis : JTH, 2026.PMID 41655787
  17. [17]CRASH-2 trial collaborators, Shakur H, Roberts I, et al. Effects of tranexamic acid on death, vascular occlusive events, and blood transfusion in trauma patients with significant haemorrhage (CRASH-2): a randomised, placebo-controlled trial. Lancet (London, England), 2010.PMID 20554319
  18. [18]CRASH-2 collaborators, Roberts I, Shakur H, et al. The importance of early treatment with tranexamic acid in bleeding trauma patients: an exploratory analysis of the CRASH-2 randomised controlled trial. Lancet (London, England), 2011.PMID 21439633
  19. [19]Chiasakul T, Cuker A Clinical and laboratory diagnosis of TTP: an integrated approach. Hematology. American Society of Hematology. Education Program, 2018.PMID 30504354
  20. [20]Gando S, Levi M, Toh CH Disseminated intravascular coagulation. Nature reviews. Disease primers, 2016.PMID 27250996
  21. [21]Sun Y, Sun H, Feng J, et al. IMMUNOSUPPRESSION CORRELATES WITH THE DETERIORATION OF SEPSIS-INDUCED DISSEMINATED INTRAVASCULAR COAGULATION. Shock (Augusta, Ga.), 2024.PMID 36735379
ICU Fellowship (CICM) Pro

$29/ monthor $279 / year

The complete ICU Fellowship (CICM) library, every exam format, one subscription.

  • Complete library for one chosen specialty
  • Timed MCQ mock exams and spaced review
  • Clinical cases & cross-table vivas
See pricingSign in
PreviousCritical care ultrasound (POCUS) in ICUResuscitationNextExtracorporeal Cardiopulmonary Resuscitation (ECPR)resuscitation