Disseminated Intravascular Coagualation
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SUBMITTED TO
MRS. MEENAL SHARMA
ASSISTANT PROFESSOR
PRESENTED BY
MS.NISHA KAUSHIK
MSC NURSING Ist YEAR
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DIC is not a kind of independent disease, but a middle process or
complication of some diseases.
It is essentially an imbalance between the coagulation process and
anticoagulation process.
It is a syndrome characterized by massive activation and consumption
of coagulation proteins, fibrinolytic proteins and platelets.
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Coagulation is usually confined to a localized area by the combination
of blood flow and circulating inhibitors of coagulation ,especially
antithrombin III.
If the stimulus to coagulation is too great ,these control mechanisms
can be overwhelmed , leading to the syndrome of DIC .
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Disseminated intravascular coagulation also known as disseminated
intravascular coagulopathy or less commonly known as consumptive
coagulopathy , is a pathological activation of coagulation (blood
clotting) mechanisms that happens in response to a variety of diseases.
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ACUTE DIC
It happened rapidly .The coagulopathy is dominant
and major symptoms are bleeding and shock, mainly seen in severe
infection ,amniotic fluid embolism.
CHRONIC DIC- It happened slowly and last several weeks
,thrombosis and clotting may predominate mainly seen in cancer.
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DIC is not a primary disease, but a disorder secondary to numerous
triggering events such as serious illnesses.
Infectious disease 31%-43%
Cancer 24%-34%
Obstetric complications 4%-12%
Severe tissue injury 1%-5%
Systemic disease
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Bacterial , viral ,rickettsia ,parasitic diseases and so on).Bacterial
infection , in particular septicemia , is commonly associated with DIC.
However, systemic infectious with other microorganisms ,such as
viruses and parasites ,also may lead to DIC.
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Acute promyelocytic leukemia ,acute myelomonocytic or monocytic
leukemia, disseminated prostatic carcinoma ,lung,breast
,gastrointestinal malignancy.
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Amniotic fluid embolism, septic abortion ,retained fetus and so on.
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Burn, heart shock ,fracture and so on.
Head trauma in particular is strongly associated with DIC ;both local
and systemic activation of coagulation may be detected after such an
event.
The increased risk of DIC ,after head trauma is understandable in
view of the relatively large amount of tissue factor in the cerebral.
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Malignant hypertension, acute respiratory distress
syndrome(ARDS),hemolytic transfusion reaction.
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DIC occurs when monocytes and endothelial cells are activated or
injured by toxic substances elaborated in the course of certain diseases.
The response of monocytes and endothelial cells to injury is to
generate tissue factor on coagulation cascade.
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AN EXPLOSIVE GENERATION OF THROMBIN DEPLETESCLOTTING FACTORS AND PLATELETS
ACTIVATES FIBRINOLYTIC SYSTEM
BLEEDING INTO THE SUBCUTANEOUS TISSUES SKIN ANDMUCOUS MEMBRANES OCCURS ALONG WITH OCCLUSION OF
BLOOD VESSELS CAUSED BY FIBRIN IN THE MICROCIRCULATION
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LESS EXPLOSIVE GENERATION OF THROMBIN DEPLETES
CLOTTING FACTOR
TIME FOR COMPENSATORY RESPONSES &DIMINISH
BLEEDING
HYPERCOAGULABLE STATE
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INTRAVASCULAR
THROMBOSIS
HYPOPERFUSION TO
TISSUE S AND
ORGANS
ISCHEMIC
DAMAGEBLEEDING
INABILITY TO FORM A
STABLE CLOT
CONSUMPTIOTN OF
COAGULATION FACORS
SECONDARY
ACTIVATION OF
THROMBOLYSIS
RELEASE OF
ANTICOAGULANTS
BLEEDING
STIMULATION OF COAGULATION
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Bleeding
Thrombosis
Hypotension or shock
Organ dysfunction
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It may occur at any site , but spontaneous bleeding and oozing at
venipuncture sites or wounds are important clues to the diagnosis.
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It is commonly manifested by digital ischemia and gangrene , renal cortical
necrosis and hemorrhagic adrenal infarction may occur.
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CLINICAL FINDINGS
Multiple bleeding sites
Ecchymoses of skin , mucous membranes
Visceral hemorrhage
Ischemic tissue
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CLINICAL FINDINGS
Signs of deep venous or arterial thrombosis or embolism
Superficial venous thrombosis, especially without varicose veins
Multiple thrombotic sites at the same time
Serial thrombotic episodes
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Platelet count
Prothrombin time(PT)
Activated partial thromboplastin
time (APTT)
Fibrin degradation products (FDP)
Fibrinogen
Antithrombin III(AT III)Protein C
Markedly decreased
Increased
Increased
Markedly increased
Normal or decreasedMarkedly decreased
Markedly decreased
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Liver diseases
Vitamin K deficiency
Sepsis
TTP(Thrombotic thrombocytopenic purpura)
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Liver disease may prolong both the PT and PTT, but fibrinogen levels
are usually normal, and the platelet count is usually normal or only
slightly reduced.
Severe liver disease may be difficult to distinguish from DIC.
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Vitamin K deficiency will not affect the fibrinogen level or platelet
count and will be completely corrected by vitamin K replacement.
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Sepsis may produce thrombocytopenia and coagulopathy may be
present because of vitamin K deficiency .However in these cases , the
fibrinogen level should be normal.
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TTP may produce fever and MAHA(Microangiopathic hemolytic
anemia).However , fibrinogen levels and other coagulation studies should
be normal.
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Treatment of the underlying disorder
Replacement therapy
Heparin therapy
Other treatment
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The primary focus should be the diagnosis and treatment of the
underlying disorder that has given rise to DIC.
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Coagulation factor deficiency require replacement with FFP(fresh
frozen plasma).
Platelet transfusion should be used to maintain a platelet count greater
than 30000/ul, and 50000/ul.
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Fibrinogen is replaced with cryoprecipitate.
One unit of cryoprecipitate usually raises the fibrinogen level by 6-8mg/dl
, so that 15 units of cryoprecipitate will raise the level from 50 to 150mg/dl.
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In some cases heparin therapy is contraindicated , but when DIC is
producing serious clinical consequences and the underlying cause is
not rapidly reversible, heparin may be necessary.
Dose : 500-750 u/h is necessary.
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Aminocaproic acid ,1 g/h iv
Tranexamic acid ,10 mg/kg, iv ,q8h,
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Those two drugs should be added to decrease the rate of fibrinolysis , raise the fibrinogen
level and control bleeding.
ATTENTION :Aminocaproic acid can never be used without heparin in DIC because of
the risk of thrombosis.
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Without bleeding or evidence of ischemia No treatment
With bleeding
Blood component as needed
Fresh frozen plasma
Cryoprecipitate
Platelet transfusions
With ischemia
Anticoagulants after bleeding risk is corrected with blood products.
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Without thromboembolism No specific therapy needed but prophylactic drugs (eg low dose heparin
, low molecular weight heparin) may be used for patients at high risk of
thrombosis.
With thromboembolism
Heparin or low-molecular weight heparin ,trial of warfarin sodium
(Coumadin).
If warfarin is unsuccessful, long term use of low molecular weight
heparin may be helpful.
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Severe bleeding
Stroke
Ischemia of extremities or organs
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ASSESSMENT
Decrease urine output
Increase bleeding
Oozing from wound Hematuria
Hematemesis
NURSING DIAGNOSIS
Risk for deficient fluid volume related to bleeding.
GOAL-Hemodynamic status maintained ;urine output >30ml/h
NURSING INTERVENTIONS
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NURSING INTERVENTIONS
Avoid procedures that can increases intracranial pressure(eg-coughing, straining
to have a bowel movement)
Monitor vital signs closely ,including neurologic checks;
a) Monitor hemodynamics
b) Monitor abdominal girth
c) Monitor urine output
Avoid rectal probes ,rectal medications.
Avoid IM injections.
Monitor amount of external bleeding carefully:
a) Assess suction output.
b) Monitor pad counts in women with vaginal bleeding.
c) Females may receive progesterone to prevent menses.
Use low pressure with any suctioning needed.
ASSESSMENT
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Decrease sensation
Cyanosis in extremities , nose ,earlobes ;focal ischemia ,superficial gangrene.
NURSING DIAGNOSIS
Risk for impaired skin integrity related to ischemia or bleeding.
GOALS-Skin integrity remains intact ;oral mucosa remains intact.
NURSING INTERVENTIONS
Assess skin with particular attention to bony prominences ,skin folds.
Reposition carefully ;use pressure reducing mattress.
Perform careful skin care every 2 hours ,emphasizing dependent areas ,all bony
prominences, perineum.
Use prolonged pressure after injection or procedure when such measures must be
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performed
(at least 5 minutes).
Perform oral hygiene carefully.
ASSESSMENT
Distended abdomen
Increased abdominal girth
NURSING DIAGNOSIS
Risk for imbalanced fluid volume related to excessive blood or factor componentreplacement.
GOALS-Absence of edema ;absence of rales ;intake not greater than output.
NURSING INTERVENTIONS
Auscultate breath sounds every 2-4 hour. Monitor extent of edema.
Monitor volume of IVs, blood products ;decreased volume of IV medications if
indicated.
ASSESSMENT
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Hypoxia
Decrease breath sounds
NURSING DIAGNOSIS
Ineffective tissue perfusion related to micro thrombi.
GOALS-Neurologic status remains intact ;absence of hypoxemia ;peripheral
pulses remain intact ;skin integrity remains intact ;urine output >30 ml/h
NURSING INTERVENTIONS
Assess neurologic ,pulmonary ,integumentary systems.
Monitor response to heparin therapy.
Assess extent of bleeding. Monitor fibrinogen levels.
ASSESSMENT
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Restlessness
Anxiety
NURSING DIAGNOSIS
Anxiety related to uncertainty or possible death.
GOALS-Fears verbalized ;realistic hope maintained.
NURSING INTERVENTION
Identify previous coping mechanism, if possible ;encourage patient to use them
as appropriate.
Explain all procedures and rationale for these in terms patient and family can
understand.
Assist family in supporting patient.
Use services from behavioral medicine ,chaplain as needed.
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