Deep Vein Thrombosis (DVT) and Pulmonary Embolism (PE)

This set of flashcards covers key concepts, definitions, and clinical practices about Deep Vein Thrombosis (DVT) and Pulmonary Embolism (PE) as discussed in the lecture notes.

Deep Vein Thrombosis (DVT)

A blood clot that forms in a vein deep within the body, often occurring in the legs.

Pulmonary Embolism (PE)

A blockage in one of the pulmonary arteries in the lungs, usually caused by blood clots that travel to the lungs from the legs.

Venous Thromboembolism (VTE)

A term that describes a spectrum of disorders related to the formation of blood clots in the venous system.

Virchow’s Triad

Three factors that contribute to venous thrombosis: venous stasis, endothelial damage, and hypercoagulability.

Venous stasis

Reduced blood flow in the veins, often caused by immobility or other factors.

Endothelial damage

Injury or alteration of the inner lining of the blood vessels, which can lead to clot formation.

Hypercoagulability

An increased tendency for blood to clot, which can be due to genetic factors, medications, or other health conditions.

Clinical manifestations of DVT

Unilateral edema, pain, tenderness, dilated superficial veins, and warmth in the affected limb.

Superficial Vein Thrombosis

Formation of a thrombus in superficial veins, commonly in the legs, often presenting with redness and pain.

Diagnosis of Deep Vein Thrombosis

Can be confirmed by noninvasive methods like venous ultrasound or invasive methods such as CT venography.

Anticoagulant therapy

A treatment used to prevent blood clots from forming or growing.

Vitamin K antagonists

A class of anticoagulants that inhibit Vitamin K-dependent clotting factors, e.g., Warfarin.

Thrombin inhibitors

Anticoagulants that inhibit the activity of thrombin, preventing the conversion of fibrinogen to fibrin.

Factor Xa inhibitors

A class of anticoagulants that target Factor Xa in the clotting cascade, e.g., Apixaban and Rivaroxaban.

Intermittent pneumatic compression devices (IPCs)

Devices that apply pressure to the legs to promote circulation and prevent clot formation.

D-Dimer test

A blood test used to help diagnose thrombosis by measuring the presence of fibrin degradation products.

Pulmonary hypertension

High blood pressure in the pulmonary arteries, often as a complication of severe PE.

Thrombolytic therapy

Treatment that dissolves blood clots using medications such as tissue plasminogen activator (tPA).

Antidote for Warfarin

Vitamin K, which is administered to reverse the effects of anticoagulation.

Heparin-induced thrombocytopenia (HIT)

A complication of heparin therapy characterized by a decrease in platelets.

Inherited clotting disorders

Genetic conditions that increase the risk of developing abnormal blood clots.

Mechanisms of PE

PE can occur due to thrombus, fat or air embolus, or tumor tissue blocking pulmonary arteries.

Clinical manifestations of PE

Symptoms like dyspnea, chest pain, hemoptysis, and signs of low oxygen saturation.

Complications of DVT and PE

Can include post-thrombotic syndrome and chronic thromboembolic pulmonary hypertension.

Prevention of VTE in hospitalized patients

Core measures include early mobilization and the use of graduated compression stockings.

Normal INR range in VKA therapy

2.0 to 3.0, which indicates effective anticoagulation.

Acute treatment for PE

Immediate anticoagulation and support of cardiorespiratory status.

Symptoms of Superficial Vein Thrombosis

Palpable, firm vein, itchy, warm, painful, and may involve varicose veins.

Long-term complications of DVT

Can lead to chronic pain, swelling, and venous ulcers.

D-dimer levels in PE

May be elevated in the presence of a thrombus but is not definitive for diagnosis.

Risk factors for DVT

Include obesity, prolonged immobility, advanced age, pregnancy, and history of VTE.

Risk factors for PE

Include previous DVT, surgery, cancer, immobilization, and use of contraceptives.

Management of PE

Includes oxygen therapy, anticoagulation, and possible surgical intervention.

Proximal DVT location

Commonly occurs in the iliac and femoral veins.

DVT clinical assessment tools

Includes the Wells score, which assesses the probability of DVT.

Non-invasive methods to assess DVT

Venous compression ultrasound and duplex ultrasound.

Differences between VTE prophylaxis and therapeutic anticoagulation

Prophylaxis uses a lower dose than therapeutic anticoagulation's management of existing VTE.

Major side effect of anticoagulants

Increased risk of bleeding.

Patient education for anticoagulant therapy

Importance of adherence, potential drug interactions, and dietary restrictions.

Thrombus

A blood clot that forms in a blood vessel and remains attached to its place of origin.

Embolus

A thrombus or other substance that travels through the bloodstream and can cause blockage.

Mechanical thrombectomy

A surgical procedure to remove a thrombus from a blood vessel.

Inferior Vena Cava (IVC) filter

A device placed in the IVC to prevent clots from reaching the lungs.

Monitoring anticoagulation effectiveness

Regular tests of INR levels are crucial for patients on warfarin.

Anticoagulants for outpatient management

Low molecular weight heparin (LMWH) may be used for at-home treatment.

Nursing interventions for DVT

Includes promoting mobility, educating about signs of DVT, and monitoring for complications.

Signs of pulmonary embolism

Can include sudden shortness of breath and chest pain that worsens with deep breaths.

Symptoms requiring immediate medical attention

Severe headache, chest pain, and signs of bleeding.

Diagnostic imaging for PE

CT pulmonary angiography is considered the gold standard for diagnosis.

Chronic venous insufficiency

Condition resulting from prolonged venous obstruction that can lead to varicose veins.

Post-thrombotic syndrome (PTS)

A condition that can occur after DVT characterized by chronic pain and swelling.

Preoperative assessment for VTE risk

Involves evaluating patient history, mobility, and comorbid conditions.

Patient education on signs of bleeding

Patients should be informed to report unusual bleeding or bruising.

Symptoms of left-sided heart failure

Can contribute to the development of pulmonary embolism due to venous congestion.

Interprofessional care team for VTE

Includes physicians, nurses, pharmacists, and palliative care specialists.

Nursing management for PE

Focuses on ensuring patient safety, monitoring symptoms, and providing education.

Impact of obesity on VTE risk

Increased body weight is associated with higher venous stasis and risk of clot formation.

Emerging therapies for anticoagulation

Includes new direct oral anticoagulants (DOACs) with fewer monitoring requirements.

Patient support during recovery

Addressing anxiety and providing education on recovery and follow-up care.

Follow-up appointments post VTE treatment

Essential for monitoring patient progress and adjustment of anticoagulation therapy.

Healthcare provider communication

Important for managing anticoagulation and ensuring a unified care strategy.

Importance of hydration in VTE prevention

Proper hydration helps maintain healthy blood viscosity and circulation.