9 Deep Vein Thrombosis Nursing Care Plans

A DVT is dangerous because of what it does next. The clot sitting in the calf or thigh is rarely the emergency. The emergency is the piece that breaks loose, travels to the lung, and drops the patient in front of you with sudden dyspnea and a falling pressure. Your job is to keep that clot where it is, keep it from growing, and catch a pulmonary embolism the moment it declares itself.

What is Deep Vein Thrombosis?

Thrombophlebitis is inflammation of the vein wall that produces a thrombosis (blood clot) and interferes with normal flow through the vessel. Venous thrombophlebitis usually occurs in the lower extremities. In superficial veins (cephalic, basilic, greater saphenous) it is rarely life-threatening and seldom requires hospitalization. In a deep vein it is life-threatening, because the clot can travel and cause a pulmonary embolism.

Three factors drive clot formation, known as Virchow's triad: venous stasis, hypercoagulability, and vessel wall injury. Stasis comes from immobility, certain drug therapies, and heart failure. Hypercoagulability is most common in patients with deficient fluid volume, pregnancy, oral contraceptive use, smoking, and some blood dyscrasias. Wall damage follows venipuncture, certain medications, trauma, and surgery. Treatment has two goals: keep the clot from dislodging (the PE risk) and limit postthrombotic syndrome.

DVT is a common venous thromboembolic (VTE) disorder with an incidence of 1.6 per 1000 annually. Even in patients who never throw a pulmonary embolus, recurrent thrombosis and postthrombotic syndrome are major sources of morbidity. Early diagnosis and treatment are what reduce that morbidity.

Nursing Care Plans and Management

Management runs on a few priorities: assess history and symptoms, give anticoagulants and monitor them, control pain, promote circulation with compression and activity, teach the patient self-care, and watch closely for the patient who is sliding toward a PE.

Nursing Problem Priorities

1. Prevent pulmonary embolism.
2. Manage pain.
3. Promote circulation and prevent complications.
4. Teach the patient.
5. Anticoagulant therapy.

Nursing Assessment

Assess for the following subjective and objective data:

• Apprehension
• Cyanosis
• Dyspnea
• Hypercapnia
• Hypoxemia
• Restlessness
• Somnolence
• Changes in the femoral, popliteal, or small calf veins:
  • Asymptomatic
  • Increased leg warmth
  • Unilateral edema
  • Pain on palpation of the calf muscle
  • Tenderness

Nursing Diagnosis

After assessment, the nurse formulates a diagnosis that fits the individual patient. The label matters less than the clinical judgment behind it. Prioritize the patient's actual health concerns over the diagnostic wording.

Nursing Goals

• The patient will demonstrate adequate ventilation and oxygenation, with ABGs in normal range.
• The patient will report or show resolution or absence of respiratory distress.
• The patient will maintain peripheral tissue perfusion in the affected extremity, shown by strong palpable pulses, reduced or absent pain, a warm and dry extremity, and adequate capillary refill.
• The patient will not develop pulmonary embolism, shown by normal breathing, normal heart rate, and no dyspnea or chest pain.
• The patient will report pain is controlled and name methods that relieve it.
• The patient will appear relaxed, sleep or rest, and engage in desired activities.

Nursing Interventions and Actions

1. Promoting Effective Gas Exchange

A DVT impairs gas exchange when it embolizes. Clot lodged in the pulmonary circulation cuts blood flow to alveoli, and the inflammatory response thickens the alveolar-capillary membrane, so oxygen and carbon dioxide move across it poorly. Watch respiratory status closely; this is where a PE shows itself first.

1. Assess level of consciousness and changes in mentation. Restlessness and irritability are early signs of systemic hypoxemia, followed by declining mentation. Hypoxia raises thrombosis risk on its own, and it develops when demand outruns supply, as when immobility or trauma cuts blood flow.

2. Auscultate the lungs for decreased or absent breath sounds and adventitious sounds (crackles). Absent sounds mark nonventilated areas. Crackles point to fluid-filled tissue or cardiac decompensation. A developing PE often presents with dyspnea, acute and severe in central PE, mild and transient in a small peripheral one.

3. Monitor vital signs and watch for changes in cardiac rhythm. Tachycardia, tachypnea, and BP changes track with worsening hypoxemia and acidosis. New rhythm changes or extra heart sounds suggest rising cardiac workload. A PE may announce itself with hypotension: systolic BP less than 90 mm Hg, or a drop of 40 mm Hg or more from baseline.

4. Assess respiratory rate and rhythm; note accessory muscle use, nasal flaring, and pursed-lip breathing. Tachypnea and dyspnea signal pulmonary obstruction and may be the only signs of a subacute PE. Severe distress means a large loss of functional lung. Shock and right ventricular dysfunction predict mortality, and a patient with both PE and DVT is at higher risk of death.

5. Look for duskiness and cyanosis in the earlobes, lips, tongue, and buccal membranes. This is systemic hypoxemia. Cyanosis is a late sign, easiest to see around the lips and oral mucosa. Never read the absence of cyanosis as adequate oxygenation.

6. Assess activity tolerance (weakness, fatigue, vital sign changes, dyspnea on exertion). Build in rest periods and limit activity to tolerance. This shows how the patient responds to activity and self-care. A 6-minute walk test gauges oxyhemoglobin saturation against exertion and the distance covered.

7. Monitor ABGs or pulse oximetry. Hypoxemia varies with the degree of obstruction, cardiopulmonary status, and shock. Respiratory alkalosis and metabolic acidosis may coexist. ABGs both confirm hypoxia and help explain its cause.

8. Evaluate sleep, noting whether the patient feels rested. Dyspnea disrupts sleep. Overnight trend oximetry shows oxyhemoglobin saturation across the night and flags a need for nighttime oxygen, though a formal sleep study is preferred when available.

9. Check the patient frequently and arrange for someone to stay, as needed. This ensures changes get caught and help is at hand. Moderate hypoxia brings restlessness, headache, and confusion, so frequent checks catch deterioration early.

10. Reposition frequently and encourage ambulation as tolerated. Turning and ambulation aerate different lung segments and improve oxygenation. Early ambulation on day 2 after starting outpatient anticoagulation, paired with effective compression, is strongly recommended. Early ambulation without elastic compression stockings is not.

11. Encourage coughing, deep breathing, and suctioning as indicated. Mobilizing secretions improves ventilation and oxygen delivery and lowers the rate of pneumonia, atelectasis, and hypoxemia. Coach a slow deep breath in, slow breath out, 3 to 5 times every 1 to 2 hours.

12. Keep the head of the bed elevated. This allows maximal chest expansion and eases breathing. Avoid the prone position; in DVT it can alter lower-extremity blood flow.

13. Assist with chest physiotherapy (postural drainage and percussion of the unaffected area) and an incentive spirometer. This deepens respiratory effort and drains secretions into the bronchi for clearance. Pulmonary rehabilitation improves dyspnea, exercise endurance, and quality of life after a PE.

14. Provide supplemental humidification, such as ultrasonic nebulizers. Moisture loosens secretions and protects mucous membranes. Flow at 4 L/minute or higher dries the nasal mucosa, so humidify low-flow oxygen.

15. Give oxygen by the ordered method. Oxygen raises tissue perfusion and lowers hypoxia risk. It is indicated for a PaO2 below 60 or SaO2 below 90.

16. Provide adequate hydration, oral or IV, as indicated. Fluids cut blood hyperviscosity, which drives thrombus formation, and support circulating volume. A low-volume state causes hemoconcentration and sluggish venous flow; VTE patients carry elevated biochemical markers of dehydration.

17. Administer medications as indicated. See the pharmacologic section.

18. Prepare the patient for a lung scan. A ventilation/perfusion scan shows perfusion defects in ventilated areas, confirming PE and the degree of obstruction. It is used mainly when CT pulmonary angiography is contraindicated, inconclusive, or insufficient.

19. Prepare for and assist with bronchoscopy. Flexible bronchoscopy removes clot piecemeal with biopsy forceps, a Fogarty catheter, suction, or a cryoprobe, clearing the airway.

20. Prepare for surgical intervention if indicated. Vena caval ligation or an intracaval umbrella is for recurrent emboli despite adequate anticoagulation, when anticoagulation is contraindicated, or with septic emboli below the renal veins. Pulmonary embolectomy is a last resort. During thrombectomy, avoid dislodging or fragmenting the clot, which causes pulmonary embolus.

21. Help the patient manage fear and anxiety. Air hunger drives fear, which raises oxygen demand. Let the patient voice it, and give brief, plain explanations of what is happening and what to expect; this restores some sense of control and eases fears about safety.

2. Enhancing Peripheral Tissue Perfusion

The same three forces that form the clot also wreck perfusion: raised coagulability seeds the clot, stasis lets it grow, and wall injury inflames the vessel. Together they choke flow through the affected limb.

1. Assess contributing factors: family or inherited clotting disorders, prolonged immobility, vein trauma from surgery or injury or infection, hormonal contraception or hormone replacement, obesity, a sedentary lifestyle, smoking, and alcohol. Most DVT is asymptomatic, so risk awareness drives early detection. Genetic thrombophilia turns up in 30% of patients with idiopathic venous thrombosis. Immobility can be as brief as a long flight or a procedure under general anesthesia.

2. Assess for signs and symptoms of DVT. In the affected leg: swelling, pain or tenderness, increased warmth, and redness. Edema is the most specific sign. A thrombus at the iliac bifurcation, pelvic veins, or vena cava produces bilateral edema rather than unilateral. Superficial thrombophlebitis presents as a palpable, indurated, cordlike, tender subcutaneous segment.

3. Measure the circumference of the affected leg. Measure 10 cm below the tibial tuberosity and 10 cm to 15 cm above the upper edge of the patella. Suspect DVT when the difference exceeds 3 cm between legs. Mild bilateral edema from high partial obstruction is easily mistaken for the dependent edema of right-sided heart failure, fluid overload, or hepatic or renal insufficiency.

4. Monitor diagnostic test results. See the laboratory and diagnostic section.

5. Monitor the coagulation profile: INR, PT, and PTT. These track anticoagulant effect. PT/INR is used for patients on warfarin. Draw a baseline before the first dose, then repeat at set intervals to adjust dosing. A prolonged PT or aPTT does not guarantee a lower risk of new clot; DVT and PE can progress despite full therapeutic anticoagulation in 13% of patients.

6. Assess pain. Leg pain occurs in 50% of patients but is entirely nonspecific. Pain on dorsiflexion of the foot is the Homan sign. Tenderness occurs in 75% of patients but also appears in 50% of patients without confirmed DVT, usually over the calf or along the deep veins of the medial thigh.

7. Maintain hydration. Adequate fluid prevents the increased viscosity that drives stasis and clotting. Dehydration was an independent predictor of VTE in patients with prior acute ischemic stroke.

8. Encourage bed rest and elevate the affected leg above heart level, depending on clot size and location. Patients usually need bed rest until symptoms ease. Elevation improves venous drainage and reduces swelling and stasis.

9. Apply warm, moist heat to the affected site. Heat eases pain and reduces inflammation. A vascular (Rooke) boot vasodilates the distal arterial bed, raises tissue pressure, and increases venous return, and it sits more comfortably than intermittent compression because it spares the heel and bony areas.

10. Apply below-knee compression stockings as prescribed; confirm correct size and fit. Graduated pressure pushes venous blood back toward the heart. A poorly fitted stocking acts as a tourniquet and promotes clotting. Below-knee elastic compression stockings assist the calf muscle pump and reduce venous hypertension and valvular reflux. Stockings with ankle pressures of 30 to 40 mm Hg cut the rate of postthrombotic syndrome by 50%.

11. Administer analgesics as prescribed. Acetaminophen is the safest choice with an anticoagulant, but do not exceed the daily limit. Avoid NSAIDs in anticoagulated patients; they raise bleeding risk.

12. Administer anticoagulants (heparin, warfarin) as prescribed. Anticoagulation prevents new clot by reducing clotting activity. Start IV heparin or subcutaneous low-molecular-weight heparin first. Begin oral warfarin while heparin continues, because warfarin's onset can take up to 72 hours; stop heparin once warfarin is therapeutic.

13. For a massive DVT severely compromising perfusion, anticipate thrombolytic therapy. Thrombolytics are reserved for severe clot burden because they cause sudden bleeding. They work best started within 5 days of symptom onset. Weigh the indication for lysis against the bleeding risk before giving it.

14. For patients unresponsive to anticoagulation, anticipate surgery. See the perioperative section.

15. Encourage ambulation as tolerated. Bed rest itself promotes stasis, a major DVT risk factor, and may worsen thrombus propagation and PE risk. With adequate anticoagulation, early ambulation and compression are the safer course.

3. Managing Acute Pain

Pain in DVT comes from two directions: the clot drops arterial circulation and oxygenation, so lactic acid builds and fires pain receptors, and the inflamed vein sensitizes those receptors and damages tissue.

1. Assess the degree and character of pain. Severity tracks with the circulatory deficit, inflammation, tissue ischemia, and edema. A change in the character of pain can mark a new complication. Leg pain occurs in 50% of patients and can be nonspecific; pain on dorsiflexion is the Homan sign.

2. Investigate sudden sharp chest pain with dyspnea, tachycardia, and apprehension, or new pain at another vascular site. This suggests PE or peripheral arterial occlusion from heparin-induced thrombocytopenia with thrombosis (HITT). Both demand immediate treatment. Pleuritic chest pain is especially worrisome and suggests a more peripheral, possibly smaller, embolus.

3. Monitor vital signs, noting rising temperature. A rising heart rate may reflect pain, fever, or inflammation, and fever itself adds to discomfort. A fever below 39°C (102.2°F) appears in 14% of patients; a temperature above 39.5°C (103.1°F) is not from the PE.

4. Maintain bed rest in the acute phase, then start early ambulation as tolerated. This reduces pain from muscle contraction and movement. Immobilizing DVT patients is outdated; early mobilization does not raise embolization risk, and outpatient treatment is safe for most patients. Inpatients can mobilize safely once adequate anticoagulation is running.

5. Encourage frequent position changes. This reduces muscle fatigue and spasm and keeps blood from pooling in the affected area, which lowers further clotting risk.

6. Provide a foot cradle. It lifts bedclothes off the affected leg and supports the foot and ankle neutrally, reducing pressure discomfort and improving flow. Pair it with position changes and compression.

7. Elevate the affected extremity. Elevation aids venous return and reduces stasis and edema. Stasis is the predisposing factor in Virchow's triad, and elevation is a simple way to improve lower-extremity drainage.

8. Apply a warm compress on a 2-hour-on, 2-hour-off schedule around the clock. Moist heat relieves pain and improves circulation through vasodilation. Heat increases blood flow and collagen extensibility, lowers joint stiffness and muscle spasm, and raises the pain threshold.

9. Teach nonpharmacologic pain techniques: deep breathing, guided imagery, relaxation. These cut the need for opioids and their side effects, give the patient more control, and improve adherence.

10. Administer medications as indicated. See the pharmacologic section.

11. Recommend a vascular warming (Rooke) boot. Boot warming reduces pain and swelling faster than standard care without raising bleeding risk, and pain and swelling are what most affect quality of life.

12. Encourage therapeutic exercise as tolerated. As pain eases, rebuild mobility gradually with combined stretching and strengthening, plus passive, active-assistive, and active movements. Teach a home regimen for after therapy ends.

13. Confirm correct wearing of compression stockings. Patients with more pain and swelling benefit most from compression, but only with correct fit. Teach proper use and the risk of pressure injury, and inspect the skin daily.

4. Preventing Bleeding Risk and Injury

Anticoagulation is the treatment and the hazard. A low platelet count or coagulopathy raises bleeding risk on its own, and the anticoagulants that stop new clots also blunt the patient's ability to clot, more so when aspirin or NSAIDs are on board.

1. Assess for signs of bleeding. Bruises, epistaxis, and gum bleeding are early signs. Investigate significant bleeding (hematemesis, hematuria, GI hemorrhage) thoroughly, because anticoagulation can unmask cancer, peptic ulcer disease, or an arteriovenous malformation.

2. Monitor platelet counts and coagulation results (INR, PT, PTT). Close monitoring keeps bleeding risk down. PT/INR is the first test for defects in secondary hemostasis; a delay in PT or aPTT points to a clotting factor deficiency or inhibitor.

3. Monitor platelets and heparin-induced platelet aggregation (HIPA) status. A sudden platelet drop with heparin is heparin-induced thrombocytopenia (HIT), less common with low-molecular-weight heparin. HIT shows a steady platelet drop while hemoglobin and hematocrit stay stable, and its most common sign is a growing or new clot. On IV heparin, patients may have chills, fever, hypertension, tachycardia, dyspnea, and chest pain.

4. Administer anticoagulant therapy as prescribed (continuous IV heparin or subcutaneous low-molecular-weight heparin; oral warfarin). Anticoagulants prevent further clot. First-line therapy for non-high-risk VTE or PE is a direct oral anticoagulant over a vitamin K antagonist.

5. If bleeding occurs on IV heparin, stop the infusion, recheck the PTT stat, and re-dose heparin based on the result. The PTT target is 1.5 to 2 times normal. Anticoagulation-related major bleeding raises the risk of death and thrombotic events regardless of agent, and reversal needs are rising with newer oral anticoagulants.

6. Avoid invasive procedures (injections, venipuncture) when possible, and use caution when they are necessary. Use a smaller-gauge needle and apply pressure to puncture sites. Interrupting anticoagulation for a procedure raises thromboembolism risk, while the procedure itself raises bleeding risk; balance the two for each patient.

7. Teach adherence and reporting. Have the patient report unusual bruising, nosebleeds, or blood in stool or urine. Anticoagulants must be taken exactly as prescribed to keep clotting parameters therapeutic. Stopping anticoagulation within the first 12 weeks carries a 25% rate of recurrent thrombosis.

8. Convert IV to oral anticoagulation after the appropriate length of therapy; monitor INR, PT, PTT. PT or INR must be therapeutic before stopping heparin. Vitamin K antagonists remain the preferred long-term oral option. The ACCP recommends stopping anticoagulation after 3 months for surgery-associated acute proximal DVT, an acute proximal DVT or PE from a nonsurgical transient risk factor, and a first unprovoked VTE with high bleeding risk.

9. If HIPA is positive, stop all heparin products and anticipate a hematology consult. Continuing heparin worsens the picture, and confirming HIT is difficult. Functional assays using washed platelets include the serotonin release assay (the gold standard) and HIPA.

10. Keep reversal agents within easy reach. First, stop the anticoagulant. Protamine sulfate counters unfractionated heparin and, less effectively, low-molecular-weight heparin. Idarucizumab reverses dabigatran in life-threatening bleeding. Andexanet alfa reverses apixaban, betrixaban, edoxaban, and rivaroxaban.

11. Do not transfuse platelets in confirmed HIT during the acute phase. Transfused platelets bind IgG, activate, and release PF4, worsening the hypercoagulable state. The cycle breaks only when heparin is stopped and proper treatment begins.

5. Initiating Health Teaching and Patient Education

Patients often do not understand why adherence and lifestyle changes matter, which is what drives recurrence. Teach the disease, its risk factors, its warning signs, and the reason behind every medication, including side effects and the need for monitoring and followup.

1. Assess the patient's understanding of causes, treatment, and prevention. This sets the starting point. DVT has an annual incidence of 80 cases per 100,000, and early recognition saves lives.

2. Teach the signs of pulmonary embolus: shortness of breath, chest pain that worsens with deep breathing or coughing, palpitations, clammy skin, lightheadedness, and cough. A clot that breaks off the leg and reaches the lung causes these. PE rarely shows the classic abrupt pleuritic pain, dyspnea, and hypoxia; it can range from sudden collapse to slowly progressive dyspnea.

3. Instruct the patient on medications, including actions, doses, and side effects. Analgesics and anti-inflammatory drugs are for short-term symptom relief. Anticoagulation may run weeks or long term depending on risk. Anticoagulation alone usually resolves immediate symptoms, and the point of further intervention is reducing the 75% long-term risk of postthrombotic syndrome. Systemic IV thrombolysis is no longer recommended because of bleeding, a slightly higher death risk, and little PTS benefit.

4. Explain the need for regular lab testing on oral anticoagulation. Routine monitoring confirms a therapeutic response and prevents recurrent clots. For inpatients on unfractionated heparin, check the aPTT or heparin activity level every 6 hours until the dose stabilizes. Patients on low-molecular-weight heparin or fondaparinux do not need aPTT monitoring.

5. Give the patient a list of signs of excessive anticoagulation. Patients need to self-manage, and early recognition speeds treatment. Bleeding is the most common adverse effect; investigate hematemesis, hematuria, or GI hemorrhage thoroughly, because anticoagulation can unmask preexisting disease.

6. Teach safety measures: an electric razor and a soft toothbrush. These cut bleeding risk. A soft-bristled brush spares the gums and oral mucosa; avoid toothpicks and dental floss, which can injure the gums.

7. Tell the patient not to rub or massage the calf. Massage can dislodge an established clot, send it into the circulation as an embolus, cause a PE, and trigger sudden death.

8. Teach correct application of compression stockings. A poorly applied stocking acts as a tourniquet and promotes clotting. Thigh-length stockings that roll down create a tourniquet effect that damages skin and reduces venous outflow. Knee-length stockings may cause wound complications after knee replacement, where the elastic sits over the incision.

9. Teach measures to prevent recurrence:

• Avoid constricting garters or socks with tight bands. Constricting clothing slows normal flow and promotes clotting; pressure that is too high restricts flow and raises clot risk.
• Do not stay in one position for long periods; get up and move every hour or so on a long flight. This prevents venous stasis. Early mobilization is safe and does not raise embolization risk.
• Maintain adequate hydration. Sufficient fluid prevents hypercoagulability; a low-volume state causes hemoconcentration and sluggish venous flow.
• Maintain a healthy body weight. Obesity drives venous insufficiency and hypertension by compressing the pelvic veins, and VTE risk climbs with rising BMI, especially alongside other risk factors.
• Do not sit with the legs crossed. Crossing the legs compresses leg veins, slows flow, and lets blood pool, raising clot risk.
• Exercise regularly. Walking, swimming, and cycling drive venous return as the calf and thigh muscles pump blood back to the heart. Sessions targeting 70% peak heart rate improve cardiorespiratory fitness, leg strength, flexibility, and calf pump function.
• Quit smoking. Nicotine is a vasoconstrictor that disrupts clotting and circulation, and smoking activates platelets in a way that predisposes to clots.
• Wear properly sized, correctly applied compression stockings as indicated. DVT patients are at high risk of recurrence and may need stockings long term. Graduated elastic compression cuts the rate of postthrombotic syndrome by 50%.

10. Explain activity restrictions and the balance between activity and rest. Rest lowers the oxygen and nutrient demands of compromised tissue and reduces the chance of fragmenting the thrombus, while balancing it with activity prevents exhaustion. In acute DVT, early walking is safe and may ease symptoms; in prior DVT, exercise training does not worsen leg symptoms and may help prevent or improve postthrombotic syndrome.

11. Teach women about hormonal contraceptives and DVT risk. Users of hormonal contraceptives carry a significantly higher DVT risk than nonusers. Inform women of this and offer education in comparably effective fertility-awareness methods.

12. Teach meticulous lower-extremity skin care. Have the patient prevent or promptly treat skin breaks and report ulcers or skin color changes. Chronic venous congestion and postphlebitis syndrome raise the risk of stasis ulcers, especially with severe or recurrent disease.

13. Review the patient's usual medications and foods on oral anticoagulation. Warfarin interacts with many foods and drugs. Salicylates and excess alcohol lower prothrombin activity, while vitamin K (multivitamins, bananas, leafy green vegetables) raises it and can push the INR outside range. Barbiturates speed warfarin metabolism, and antibiotics alter intestinal flora and can interfere with vitamin K synthesis.

6. Assessing and Monitoring for Potential Complications

Vigilant monitoring is what catches a PE or postthrombotic syndrome in time. Track vital signs, coagulation profiles, and the limb itself for any change that needs immediate attention.

1. Assess vital signs frequently. They give baseline data and flag change. Elevated temperature, rising heart rate, and falling blood pressure may signal infection or another complication.

2. Assess and document the thrombus location, size, and characteristics. This gauges severity, migration or obstruction potential, and treatment response, and gives a baseline for comparison.

3. Monitor and document peripheral pulses. Diminished or absent pulses distal to the clot suggest compromised circulation from clot extension or obstruction. Catch it early.

4. Assess for signs of pulmonary embolism. Watch for sudden dyspnea, tachypnea, chest pain, hemoptysis, anxiety, or a change in mental status. Early detection and treatment are essential.

5. Observe for compartment syndrome. A massive DVT can raise pressure within the limb. Watch for severe pain, swelling, paresthesia, pallor, and loss of distal pulse. Timely intervention prevents tissue damage.

6. Perform regular neurological assessments. Changes may point to stroke or cerebral venous thrombosis. Assess level of consciousness, motor or sensory deficits, visual changes, and sudden severe headache.

7. Monitor laboratory values. Track PT, aPTT, INR, and D-dimer. Abnormal results mark progression or resolution of DVT or the effect of anticoagulation.

8. Evaluate for bleeding or hemorrhage. Anticoagulation raises bleeding risk. Watch for tachycardia, hypotension, melena, hematemesis, hematuria, ecchymosis, or bleeding from lines or puncture sites.

9. Assess for skin changes and ulceration. Chronic DVT causes venous stasis ulcers. Watch for discoloration, edema, increased warmth, or breakdown in the affected limb, and manage ulcers early to prevent infection.

10. Teach the patient which signs to report. Reinforce reporting pain, swelling, redness, warmth, shortness of breath, chest pain, or any other concerning symptom.

7. Administering Medications and Pharmacologic Support

Drug therapy means close monitoring of effect, adverse reactions, and interactions. Coagulation studies and complete blood counts guide dosing and keep bleeding risk down, and the nurse drives administration, monitoring, and teaching.

1. Thrombolytic agents (alteplase, anistreplase, reteplase, streptokinase, tenecteplase, urokinase) bring about clot lysis and immediate normalization of venous flow. They can cause intracranial bleeding, rarely fatal or disabling, so reserve them for compelling indications and weigh known contraindications.

2. Morphine sulfate and antianxiety agents reduce pain or anxiety and ease the work of breathing. Use morphine cautiously: morphine use within the past 30 days is associated with PE in DVT patients, and the risk rose with higher doses.

3. Anticoagulants are the mainstay, beginning with heparin and now including vitamin K antagonists and low-molecular-weight heparin. Long-term anticoagulation prevents the high rate of recurrent venous thrombosis and thromboembolic events.

4. Opioid and nonopioid analgesics relieve pain and reduce muscle tension. Opioids act at opioid receptors in the brain, spinal cord, and peripheral sites, and share side effects: respiratory depression, sedation, nausea and vomiting, and constipation.

5. Antipyretics (acetaminophen) reduce fever and inflammation. With NSAIDs off the table in DVT, acetaminophen suits short-term use. Monitor for hepatotoxicity in patients taking it regularly or beyond the maximum dose of 3 g daily.

8. Monitoring Laboratory and Diagnostic Procedures

These tests show clotting status, thrombus severity, and treatment response, and let the team detect complications and adjust the plan. Coordinate closely with the lab and radiology for timely, accurate results.

1. Ultrasonography is the first-line imaging test for DVT: easy to use, no radiation or contrast, with high sensitivity and specificity in experienced hands. Compression ultrasonography images the calf to the groin in the axial plane, with some protocols adding Doppler.

2. D-dimer assay marks clot lysis and tracks treatment. D-dimer stays elevated in DVT for about 7 days. A patient presenting late, after the clot has organized and adhered, may have low D-dimer. Current evidence strongly supports D-dimer in suspected DVT.

3. Impedance plethysmography (IPG) uses an inflated cuff to block venous flow and measure the rise in limb blood volume. It is sensitive and specific for proximal vein thrombosis but insensitive for calf vein thrombosis, nonoccluding proximal thrombus, and iliofemoral thrombus above the inguinal ligament.

4. Contrast venography injects radiopaque contrast through a foot vein to localize thrombi in the deep system. Venography with pedal vein cannulation, contrast injection, and serial limb radiographs remains the criterion standard.

9. Providing Perioperative Care

Surgical care is individualized to the patient's history, clot characteristics, and overall risk.

1. Placement of a vena cava filter. The filter sits inside the vena cava and catches clots before they reach the lungs, preventing PE. It is not recommended in acute VTE already on anticoagulation. The filter is a mechanical barrier to emboli larger than 4 mm.

2. Thrombectomy. The most severe cases may need surgical clot removal, traditionally for massive swelling and phlegmasia cerulea dolens. When the thrombus is extensive, fibrinolysis alone may not dissolve its volume.

3. Replacement of venous valves. Percutaneously placed bioprosthetic venous valves are in development and may offer a minimally invasive therapy for the long-term postthrombotic syndrome caused by valve destruction, reducing one of the main reasons for aggressive thrombolysis in acute DVT.