Coagulation Disorders Overview

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Questions and Answers

What is the primary cause of coagulopathy?

  • Increased levels of vitamin K
  • Excessive hydration leading to dilutional coagulopathy
  • Genetic mutations affecting hemoglobin
  • Alterations in platelets, clotting factors, or both (correct)

Which condition is characterized by a normal platelet production but a decreased lifespan due to antiplatelet antibodies?

  • Heparin-induced thrombocytopenia (HIT)
  • Thrombotic thrombocytopenic purpura (TTP)
  • Idiopathic or immune thrombocytopenic purpura (ITP) (correct)
  • Disseminated intravascular coagulation (DIC)

What happens in thrombotic thrombocytopenic purpura (TTP)?

  • Platelets form microclots disrupting organ function (correct)
  • Platelet production is significantly increased
  • There is a complete absence of clotting factors
  • Platelets abnormally aggregate, leading to excessive bleeding

What is the mortality rate for untreated thrombotic thrombocytopenic purpura (TTP)?

<p>10-20% (A)</p> Signup and view all the answers

Which coagulopathy is caused by heparin treatment resulting in an unexplained low platelet count?

<p>Heparin-induced thrombocytopenia (HIT) (B)</p> Signup and view all the answers

What is the risk for a client diagnosed with disseminated intravascular coagulation (DIC)?

<p>Risk for internal and external bleeding and organ damage (D)</p> Signup and view all the answers

In hemophilia, what factor deficiencies are primarily involved?

<p>Factor VIII or Factor IX (C)</p> Signup and view all the answers

What characterizes an autoimmune disorder as a cause of coagulopathy?

<p>Normal production of platelets and clotting factors but immune system attacks (A)</p> Signup and view all the answers

Which risk factor is specifically associated with Immune Thrombocytopenic Purpura (ITP)?

<p>Recent viral infection in children (B)</p> Signup and view all the answers

What underlying condition is commonly associated with Heparin-Induced Thrombocytopenia (HIT)?

<p>Receiving heparin for longer than 1 week (B)</p> Signup and view all the answers

Which of the following conditions is NOT a risk factor for Thrombotic Thrombocytopenic Purpura (TTP)?

<p>Family history of clotting disorders (A)</p> Signup and view all the answers

Which of these conditions is one of the risk factors for developing disseminated intravascular coagulation (DIC)?

<p>Septicemia (D)</p> Signup and view all the answers

Among the following, which factor significantly increases the risk of HIT in patients?

<p>Administration of heparin for more than one week (A)</p> Signup and view all the answers

What is a common symptom of microvascular thrombosis?

<p>Petechiae and ecchymoses (D)</p> Signup and view all the answers

What vital sign changes may indicate excessive bleeding?

<p>Tachycardia and hypotension (C)</p> Signup and view all the answers

Which finding is associated with organ failure due to microemboli?

<p>Cyanosis of nail beds (A)</p> Signup and view all the answers

Which of the following is least likely to be observed with spontaneous bleeding disorders?

<p>Recurrent infections (C)</p> Signup and view all the answers

What physical symptom may indicate heparin-induced thrombocytopenia (HIT)?

<p>Warmth and redness in lower extremities (C)</p> Signup and view all the answers

What is the expected reference range for hemoglobin in females?

<p>12 to 16 g/dL (B)</p> Signup and view all the answers

Which laboratory test shows an increased level in patients with DIC?

<p>D-dimer (A), Prothrombin time (B), Thrombin time (C)</p> Signup and view all the answers

What is the expected reference range for platelet levels?

<p>150,000 to 400,000 mm3 (C)</p> Signup and view all the answers

Which of the following represents an increased laboratory finding in DIC?

<p>Fibrin split product levels (B), Prothrombin time (D)</p> Signup and view all the answers

What is the expected reference range for prothrombin time?

<p>11.0 to 12.5 seconds (C)</p> Signup and view all the answers

What is the primary focus of nursing interventions for a patient with disseminated intravascular coagulation (DIC)?

<p>Assessing and correcting the underlying cause (A)</p> Signup and view all the answers

Which manifestation should a nurse monitor for as a sign of microemboli in a patient with DIC?

<p>Cyanotic nail beds (B)</p> Signup and view all the answers

What should be prioritized in the nursing care of a patient experiencing complications from blood transfusions?

<p>Regularly assessing vital signs (A)</p> Signup and view all the answers

Which nursing intervention should be avoided to prevent the risk of cerebral hemorrhage in a patient with DIC?

<p>Instructing to avoid Valsalva maneuver (A)</p> Signup and view all the answers

What laboratory values should be monitored closely in a patient diagnosed with disseminated intravascular coagulation (DIC)?

<p>Clotting factors (A)</p> Signup and view all the answers

Which medication is commonly used in the treatment of Thrombotic Thrombocytopenic Purpura (TTP)?

<p>Aspirin (A)</p> Signup and view all the answers

What is the role of anticoagulants in Disseminated Intravascular Coagulation (DIC)?

<p>To decrease the formation of microclots (B)</p> Signup and view all the answers

In the management of Heparin-Induced Thrombocytopenia (HIT), which type of medication is utilized?

<p>Direct thrombin inhibitors (A)</p> Signup and view all the answers

Which class of medications is used in treating Immune Thrombocytopenic Purpura (ITP)?

<p>Corticosteroids (A)</p> Signup and view all the answers

How do immunosuppressive therapies impact Thrombotic Thrombocytopenic Purpura (TTP)?

<p>They decrease the intensity of complications (D)</p> Signup and view all the answers

What therapeutic procedure can be used for treating Thrombotic Thrombocytopenic Purpura (TTP)?

<p>Plasma exchange (B)</p> Signup and view all the answers

In which situation is a splenectomy indicated for a patient with Immune Thrombocytopenic Purpura (ITP)?

<p>After initial medical management failure (C)</p> Signup and view all the answers

What is a potential outcome if a patient with TTP does not receive timely treatment?

<p>Progression to acute kidney failure (B)</p> Signup and view all the answers

Which of the following is a common medical management option for Immune Thrombocytopenic Purpura (ITP) before considering a splenectomy?

<p>Corticosteroids (C)</p> Signup and view all the answers

What is the primary treatment goal in patients undergoing plasma exchange for TTP?

<p>Remove antibodies and toxins from blood (D)</p> Signup and view all the answers

Flashcards

Coagulation Disorders

Conditions affecting the body's ability to clot blood, often due to issues with platelets or clotting factors.

Coagulopathy

A condition affecting blood clotting ability.

Immune Thrombocytopenic Purpura (ITP)

Autoimmune disorder decreasing platelet lifespan due to antibodies, leading to bleeding.

Thrombotic Thrombocytopenic Purpura (TTP)

Coagulopathy causing platelet clumping, reduced circulation, and inappropriate clotting, increasing risk of organ damage.

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Heparin-induced Thrombocytopenia (HIT)

An immune-mediated clotting disorder caused by heparin treatment, resulting in low platelet count.

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Disseminated Intravascular Coagulation (DIC)

Life-threatening condition with simultaneous clotting and bleeding due to microclots.

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Hemophilia

Inherited bleeding disorder caused by a deficiency in clotting factors VIII or IX, often triggered by minor trauma.

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Mortality Rate (ITP)

5% for adults with ITP.

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Risk Factors for ITP

Conditions that increase the likelihood of developing Immune Thrombocytopenic Purpura (ITP).

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Secondary Conditions for ITP

Other medical conditions that can contribute to ITP, often by affecting the immune system or platelet function.

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Risk Factors for HIT

Conditions that increase the chances of developing Heparin-Induced Thrombocytopenia (HIT).

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TTP and Autoimmunity

Thrombotic Thrombocytopenic Purpura (TTP) is often a consequence of other autoimmune disorders.

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Why TTP Is Serious

TTP leads to platelet clumps, reduced circulation, and inappropriate clotting, increasing the risk of organ damage.

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Bleeding Gums and Nose

Unusual spontaneous bleeding from the gums and nose (epistaxis) is a sign of a potential clotting disorder. This can indicate a lack of platelets or clotting factors, making it difficult for the body to form clots.

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Petechiae & Ecchymoses

Tiny red or purple spots (petechiae) and larger bruises (ecchymoses) appearing on the skin, especially on the extremities, upper chest, and neck, can signify a problem with platelet function. This means the body is having trouble forming blood clots to stop bleeding.

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Hematuria

Blood in the urine (hematuria) can also be a sign of a clotting disorder, particularly if it appears without a clear cause. The presence of blood in the urine suggests that clotting isn't happening properly in the kidneys or the urinary tract.

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Excessive Bleeding

Excessive bleeding from common procedures like venipuncture or injections, or even minor traumas, can indicate a clotting disorder. This implies that the body isn't forming clots efficiently to stop the bleeding.

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Microemboli

Organ failure can occur due to tiny clots (microemboli) blocking blood flow to vital organs. These clots can be a result of widespread clotting disorders, affecting the entire body and preventing proper circulation.

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Hemoglobin (Hgb) in DIC

Decreased hemoglobin levels are a sign of Disseminated Intravascular Coagulation (DIC). This is because DIC causes widespread clotting, consuming clotting factors and platelets, leading to anemia.

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Platelet Count in ITP

Low platelet count (thrombocytopenia) is a key feature of Immune Thrombocytopenic Purpura (ITP). The immune system mistakenly attacks platelets, causing their destruction and leading to bleeding.

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Prothrombin Time (PT) in DIC

Prolonged prothrombin time (PT) indicates a clotting disorder like DIC. This is because DIC consumes clotting factors which are essential for clot formation, making the blood take longer to clot.

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Partial Thromboplastin Time (PTT) in DIC

Increased PTT implies a clotting disorder like DIC. DIC involves the activation of the intrinsic clotting pathway, which the PTT measures. This leads to prolonged coagulation time.

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D-dimer in DIC

Elevated D-dimer is a strong indicator of DIC. It is a fragment of fibrin, the protein that forms blood clots. DIC produces many microclots, leading to high D-dimer levels.

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DIC: Underlying Cause

Disseminated Intravascular Coagulation (DIC) is often triggered by an underlying condition, such as sepsis, malignancy, or hemorrhage. Addressing this primary cause is crucial for successful treatment.

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DIC: Organ Damage

DIC can damage organs by forming small blood clots (microemboli) that obstruct blood flow. This can lead to organ dysfunction or failure.

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DIC: Monitoring

Regularly assess vital signs, hemodynamics, and lab values to monitor for DIC complications. Watch for signs of organ failure, intracranial bleeding, and clotting factor deficiencies.

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DIC: Management

Treatment for DIC typically involves fluid replacement, blood transfusions (including platelets and clotting factors), and managing complications from blood product administration.

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DIC: Preventing Injury

Protect the patient from injuries to minimize bleeding risks, especially in the presence of DIC.

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ITP Treatment

ITP is treated with corticosteroids and immunosuppressants to suppress the immune system's attack on platelets.

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TTP Treatment

TTP is treated with antiplatelet medications to prevent further platelet clumping and immunosuppressants to reduce complications.

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HIT Treatment

HIT is treated with anticoagulants that are direct thrombin inhibitors, like argatroban, lepirudin, or bivalirudin, to prevent further clotting.

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DIC Treatment

DIC is treated with anticoagulants like heparin to reduce microclot formation and conserve clotting factors.

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What does DIC treatment aim to achieve?

The main goal of DIC treatment is to decrease microclot formation and conserve clotting factors by using anticoagulants like heparin.

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Plasma Exchange (TTP)

A procedure used to remove antibodies and other harmful substances from the blood, particularly for patients with Thrombotic Thrombocytopenic Purpura (TTP).

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Splenectomy (ITP)

Surgical removal of the spleen, an organ that filters blood and can sometimes contribute to the destruction of platelets in patients with Immune Thrombocytopenic Purpura (ITP).

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What is TTP?

A rare and serious blood disorder that occurs when small blood clots form in the tiny blood vessels throughout the body, leading to a decrease in the number of platelets and potentially causing organ damage.

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What is ITP?

An autoimmune disorder where the body's immune system mistakenly attacks and destroys platelets, leading to a low platelet count and increased risk of bleeding.

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When is a Splenectomy Performed?

Splenectomy for ITP is considered when medical management, such as medications, fails to control the platelet count and bleeding, or when the disease is severe and doesn't respond to treatment.

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Study Notes

Coagulation Disorders

  • Coagulation disorders arise from problems with platelets, clotting factors, or both.
  • Coagulopathy is any condition affecting blood clotting ability.
  • Suspected when standard bleeding-control methods fail.
  • Can develop secondary to autoimmune conditions or significant blood loss.
  • Microemboli paradoxically deplete clotting factors, leading to hemorrhages alongside intravascular clotting.

Idiopathic (Immune) Thrombocytopenic Purpura (ITP)

  • An autoimmune disorder impacting platelet lifespan.
  • Antiplatelet antibodies shorten platelet life, despite normal production.
  • Can cause severe bleeding after procedures like C-sections or lacerations.
  • Mortality rate for adults with ITP is 5%.

Thrombotic Thrombocytopenic Purpura (TTP)

  • Characterized by abnormal platelet clumping in capillaries due to autoimmune reaction.
  • Leads to low platelet count and inadequate clotting response to injury.
  • Can result in kidney failure, heart attack, stroke, and is deadly within three months if untreated.
  • Mortality rate is 10-20%.

Heparin-Induced Thrombocytopenia (HIT)

  • An immunity-mediated clotting disorder triggered by heparin therapy.
  • Causes unexplained low platelet count.
  • Mortality rate is 30%.

Disseminated Intravascular Coagulation (DIC)

  • A life-threatening condition with simultaneous clotting and anti-clotting mechanisms.
  • Patients risk both internal and external bleeding, organ damage due to micro-clots.

Hemophilia

  • An inherited bleeding disorder due to deficiencies in factor VIII or factor IX.
  • Often triggered by minor trauma.
  • Relatively common, typically diagnosed in early childhood.
  • Affects over one million individuals.

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