Disseminated intravascular coagulation: Difference between revisions
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==Background== | ==Background== | ||
*Abbreviation = DIC | |||
*Widespread and inappropriate activation of the coagulation and fibrinolytic systems | |||
**Exposure of blood to procoagulants such as tissue factor and cancer procoagulant | |||
**Formation of fibrin within the circulation | |||
**Fibrinolysis | |||
**Depletion of clotting factors | |||
**End-organ damage | |||
*Chronic DIC occurs when hepatic/bone marrow production balances coag factor consumption | |||
==Causes== | ===Causes=== | ||
*[[Sepsis]](most common cause) | |||
*Carcinoma | |||
*[[Leukemia]] | |||
*[[Trauma]] | |||
*[[Pancreatitis]] | |||
**Brain injury, [[crush injury]], [[burns]], [[rhabdomyolysis]], [[fat embolism]] | |||
*[[hepatic failure|Liver disease]] | |||
*[[Pregnancy]]-related | |||
**[[Placental Abruption]], [[Amniotic Fluid Embolus]], [[septic abortion]], [[HELLP Syndrome]], [[acute fatty liver of pregnancy]] | |||
*[[Snake bite]] | |||
*[[ARDS]] | |||
*[[Transfusion reaction]] | |||
*[[Transplant complications|Transplant rejection]] | |||
==Clinical Features== | ==Clinical Features== | ||
''[[hemorrhage|Bleeding]] or [[thromboembolism|thrombosis]] can predominate (bleeding is more common ~65%)'' | |||
*[[Shoc]]k (15%) | |||
* | *[[Acute renal failure]] (25-40%) | ||
*[[hepatic failure|Hepatic dysfunction]] (19%) | |||
* | *Respiratory dysfunction (16%) | ||
* | *[[Thromboembolism]] (7%) | ||
*CNS involvement (2%) | |||
* | *[[Purpura fulminans]] (widespread arterial and venous thromboses) | ||
**Associated with significant [[bacteremia]] | |||
* | |||
==Diagnosis== | ==Differential Diagnosis== | ||
{{Hemolytic anemia DDX}} | |||
{{Thrombocytopenia}} | |||
{{Increased bleeding DDX}} | |||
{{Bullous rashes DDX}} | |||
==Evaluation== | |||
===Acute=== | |||
*Platelets<ref>Spero JA, Lewis JH, Hasiba U. Disseminated intravascular coagulation. Findings in 346 patients. Thromb Haemost. 1980 Feb 29. 43(1):28-33.</ref> | |||
**[[thrombocytopenia|Low]] (or dropping) in 98% of DIC patients | |||
**Sn, not Sp | |||
**Repeat platelets may be necessary if first level normal or if need to trend | |||
*PT and PTT | |||
**[[coagulopathy|Prolonged]] | |||
**May be normal in as many as 50% of DIC patients<ref>Olson JD, Kaufman HH, Moake J, O'Gorman TW, Hoots K, Wagner K, et al. The incidence and significance of hemostatic abnormalities in patients with head injuries. Neurosurgery. 1989 Jun. 24(6):825-32.</ref> | |||
**Serial coagulation testing may be necessary | |||
**PT, not INR, is used for monitoring<ref>Levi M, Toh CH, Thachil J, Watson HG. Guidelines for the diagnosis and management of disseminated intravascular coagulation. British Committee for Standards in Haematology. Br J Haematol. 2009 Apr. 145(1):24-33.</ref> | |||
*Fibrinogen | |||
**Low | |||
**<100 correlates with severe DIC | |||
**May be normal (acute phase reactant), up to 57% in DIC patients<ref>Spero JA, Lewis JH, Hasiba U. Disseminated intravascular coagulation. Findings in 346 patients. Thromb Haemost. 1980 Feb 29. 43(1):28-33.</ref> | |||
*FDP | |||
**Elevated | |||
*[[D-dimer]] | |||
**Elevated | |||
**Sn but not Sp: may also see in patients with chronic liver or renal disease | |||
**Combination of elevated FDP and d-dimer may increase sensitivity and specificity | |||
*RBCs | |||
**Fragmented (not specific) | |||
== | ===Chronic=== | ||
*FDP: Elevated | |||
*[[D-dimer]]: Elevated | |||
*Platelet: Variable | |||
*Fibrinogen: Normal-elevated | |||
*PT: Normal | |||
*PTT: Normal | |||
*RBCs | |||
**Fragmented | |||
==Management== | |||
*Treat underlying illness | |||
*Replacement treatment | |||
**Only indicated in with documented DIC + bleeding or impending procedure | |||
***Fibrinogen | |||
****Consider repletion with [[cryoprecipitate]] to raise level to 100-150 | |||
***[[Platelets]] | |||
****Consider repletion if <50K with bleeding or <20K without bleeding | |||
***[[FFP]] | |||
****Consider repletion to goal of PT and PTT < 1.5 times the normal limit | |||
***[[Vitamin K]] | |||
***[[Folate]] | |||
**[[Heparin]] | |||
***Consider only if thromboembolic are predominant symptoms from chronic DIC | |||
== | ==Disposition== | ||
*Admit | |||
==See Also== | ==See Also== | ||
*[[Coagulopathy (Main)]] | *[[Coagulopathy (Main)]] | ||
== | ==References== | ||
<references/> | |||
[[Category:Heme/Onc]] | [[Category:Heme/Onc]] |
Latest revision as of 00:24, 1 October 2019
Background
- Abbreviation = DIC
- Widespread and inappropriate activation of the coagulation and fibrinolytic systems
- Exposure of blood to procoagulants such as tissue factor and cancer procoagulant
- Formation of fibrin within the circulation
- Fibrinolysis
- Depletion of clotting factors
- End-organ damage
- Chronic DIC occurs when hepatic/bone marrow production balances coag factor consumption
Causes
- Sepsis(most common cause)
- Carcinoma
- Leukemia
- Trauma
- Pancreatitis
- Brain injury, crush injury, burns, rhabdomyolysis, fat embolism
- Liver disease
- Pregnancy-related
- Snake bite
- ARDS
- Transfusion reaction
- Transplant rejection
Clinical Features
Bleeding or thrombosis can predominate (bleeding is more common ~65%)
- Shock (15%)
- Acute renal failure (25-40%)
- Hepatic dysfunction (19%)
- Respiratory dysfunction (16%)
- Thromboembolism (7%)
- CNS involvement (2%)
- Purpura fulminans (widespread arterial and venous thromboses)
- Associated with significant bacteremia
Differential Diagnosis
Microangiopathic Hemolytic Anemia (MAHA)
- Disseminated Intravascular Coagulation (DIC)
- Thrombotic Thrombocytopenic Purpura (TTP)
- Hemolytic Uremic Syndrome (HUS)
- HELLP syndrome
- Heparin-Induced Thrombocytopenia (HIT)
- Hereditary spherocytosis
- Paroxysmal nocturnal hemoglobinuria (PNH)
- Malignant hypertension
- Scleroderma
- Antiphospholipid Syndrome (APS)
- Other medical causes: malignancy, renal allograft rejection, vasculitides like polyarteritis nodosa and Wegener's granulomatosis
- Drugs: chemotherapy; Clopidogrel (Plavix) associated with TTP
- Nonvascular causes: prosthetic valve (more common with mechanical, more common at aortic valve), LVAD, TIPS, coil embolization, patched AV shunt, AVM
Thrombocytopenia
Decreased production
- Marrow infiltration (tumor or infection)
- Viral infections (rubella, HIV)
- Marrow suppression (commonly chemotherapy or radiation)
- Congenital thrombocytopenia
- Fanconi anemia
- Alport syndrome
- Bernand Soulier
- Vitamin B12 and/or folate deficiency
Increased platelet destruction or use
- Idiopathic thrombocytopenic purpura
- Thrombotic Thrombocytopenic Purpura (TTP)
- Hemolytic Uremic Syndrome (HUS)
- Disseminated Intravascular Coagulation (DIC)
- Viral infections (HIV, mumps, varicella, EBV)
- Drugs (heparin, protamine)
- Postransfusion or Posttransplantation
- Autoimmune destruction (SLE or Sarcoidosis)
- Mechanical destruction
- Artificial valves
- ECMO
- HELLP syndrome
- Excessive hemorrhage
- Hemodialysis, extracorporeal circulation
- Splenic Sequestration
- Occurs in Sickle cell disease and Cirrhosis
Drug Induced
- sulfa antibiotics, ETOH, ASA, thiazide diuretics/furosemide
Comparison by Etiology
ITP | TTP | HUS | HIT | DIC | |
---|---|---|---|---|---|
↓ PLT | Yes | Yes | Yes | Yes | Yes |
↑PT/INR | No | No | No | +/- | Yes |
MAHA | No | Yes | Yes | No | Yes |
↓ Fibrinogen | No | No | No | No | Yes |
Ok to give PLT | Yes | No | No | No | Yes |
Coagulopathy
Platelet Related
- Too few
- Nonfunctional
Factor Related
- Acquired (Drug Related)
- Warfarin (Coumadin)
- Unfractionated heparin
- Low molecular weight heparin (i.e. enoxaparin (Lovenox), dalteparin)
- Factor Xa Inhibitors (e.g. rivaroxaban, apixaban, fondaparinux, edoxaban)
- Direct thrombin inhibitors (e.g. dabigatran, argatroban, bivalirudin)
- Illness induced
- Genetic
Vesiculobullous rashes
Febrile
- Diffuse distribution
- Varicella (chickenpox)
- Smallpox
- Monkeypox
- Disseminated gonococcal disease
- DIC
- Purpural fulminans
- Localized distribution
Afebrile
- Diffuse distribution
- Bullous pemphigoid
- Drug-Induced bullous disorders
- Pemphigus vulgaris
- Phytophotodermatitis
- Erythema multiforme major
- Bullous impetigo
- Localized distribution
- Contact dermatitis
- Herpes zoster (shingles)
- Dyshidrotic eczema
- Burn
- Dermatitis herpetiformis
- Erythema multiforme minor
- Poison Oak, Ivy, Sumac dermatitis
- Bullosis diabeticorum
- Bullous impetigo
- Folliculitis
Evaluation
Acute
- Platelets[1]
- Low (or dropping) in 98% of DIC patients
- Sn, not Sp
- Repeat platelets may be necessary if first level normal or if need to trend
- PT and PTT
- Fibrinogen
- Low
- <100 correlates with severe DIC
- May be normal (acute phase reactant), up to 57% in DIC patients[4]
- FDP
- Elevated
- D-dimer
- Elevated
- Sn but not Sp: may also see in patients with chronic liver or renal disease
- Combination of elevated FDP and d-dimer may increase sensitivity and specificity
- RBCs
- Fragmented (not specific)
Chronic
- FDP: Elevated
- D-dimer: Elevated
- Platelet: Variable
- Fibrinogen: Normal-elevated
- PT: Normal
- PTT: Normal
- RBCs
- Fragmented
Management
- Treat underlying illness
- Replacement treatment
- Only indicated in with documented DIC + bleeding or impending procedure
- Fibrinogen
- Consider repletion with cryoprecipitate to raise level to 100-150
- Platelets
- Consider repletion if <50K with bleeding or <20K without bleeding
- FFP
- Consider repletion to goal of PT and PTT < 1.5 times the normal limit
- Vitamin K
- Folate
- Fibrinogen
- Heparin
- Consider only if thromboembolic are predominant symptoms from chronic DIC
- Only indicated in with documented DIC + bleeding or impending procedure
Disposition
- Admit
See Also
References
- ↑ Spero JA, Lewis JH, Hasiba U. Disseminated intravascular coagulation. Findings in 346 patients. Thromb Haemost. 1980 Feb 29. 43(1):28-33.
- ↑ Olson JD, Kaufman HH, Moake J, O'Gorman TW, Hoots K, Wagner K, et al. The incidence and significance of hemostatic abnormalities in patients with head injuries. Neurosurgery. 1989 Jun. 24(6):825-32.
- ↑ Levi M, Toh CH, Thachil J, Watson HG. Guidelines for the diagnosis and management of disseminated intravascular coagulation. British Committee for Standards in Haematology. Br J Haematol. 2009 Apr. 145(1):24-33.
- ↑ Spero JA, Lewis JH, Hasiba U. Disseminated intravascular coagulation. Findings in 346 patients. Thromb Haemost. 1980 Feb 29. 43(1):28-33.