Peripheral Vascular

VASCULAR DISORDERS

PERIPHERAL VASCULAR DISEASE (PVD / PAD of lower extremities)

Definition of PAD

  • Peripheral Artery Disease (PAD):

    • Arteriosclerosis: Thickening of the arterial walls.

    • Atherosclerosis: A type of arteriosclerosis characterized by the buildup of plaques in vascular vessels.

    • Known for progressive narrowing of arteries leading to reduced blood flow.

    • Strongly related to other forms of Cardiovascular Disease (CVD) and their risk factors.

    • More prevalent in the lower extremities.

Risk Factors for PAD

  • Smoking

  • High Cholesterol

  • Hypertension (High Blood Pressure)

  • Diabetes

Manifestations of PAD

  • Intermittent Claudication: Pain during walking that goes away with rest.

  • Shiny, taut skin on the affected extremities.

  • Hair loss in the lower limbs.

  • Decreased peripheral pulses indicating reduced blood flow.

  • Numbness/tingling in toes and feet.

  • Pain associated with ischemia (insufficient blood supply).

  • May progress to Critical Limb Ischemia, a severe form of PAD.

Ulcerations & Delayed Wound Healing

  • Arterial Ulcers:

    • Commonly found on toes, heels, and lateral ankles.

    • Appearance: pale or ischemic skin, smooth edges, minimal drainage.

  • Venous Ulcers:

    • Located on medial ankles.

    • May present as yellow (slough) or red (ruddy), with irregular shape and moderate to large drainage.

Arterial Insufficiency

  • Pathophysiology:

    • Build-up of fatty plaques (atherosclerosis).

  • Pain Characteristics:

    • Location: Deep muscle pain, commonly in calf or foot.

    • Described as intermittent claudication that worsens after physical activity.

  • Aggravating Factors:

    • Activity or elevation of the legs.

  • Associated Symptoms:

    • Cool, pale skin; significantly decreased pulses and sensation; hair loss on legs.

  • At-risk Populations:

    • Predominantly men, individuals with diabetes, hypertension, smokers, and those with obesity.

  • Relief:

    • Pain alleviated by rest or standing/dangling legs.

Diagnostics for PAD

  • Doppler Ultrasound: To assess blood flow.

  • Segmental Blood Pressure Measurements: Measurements taken at the thigh, below the knee, and ankle.

    • A drop of >30 mmHg is indicative of PAD.

  • Ankle/Brachial Index (ABI): A comparison of the blood pressure in the ankle with that in the arm to diagnose PAD.

  • Invasive Digital Angiography: Provides detailed images of the arteries.

Medical Management of PAD

  • Angioplasty: This procedure involves using a balloon to widen narrowed or obstructed blood vessels.

  • Stents: Small mesh tubes that help keep arteries open.

  • Atherectomy: Surgical removal of plaque from an artery.

  • Cryoplasty: Combines balloon angioplasty with the application of cold to reduce tissue injury.

  • Peripheral Artery Bypass: Surgery to create a new path for blood to flow.

  • Thrombolysis: The breakdown of blood clots.

  • Antiplatelet Therapy: To prevent blood clots from forming.

  • Modification of Risk Factors: Encouragement to quit smoking, manage blood pressure, and control cholesterol and diabetes.

Nursing Management of PAD

  • Post-operative Management:

    • Encourage activity as per medical orders.

    • Prevent and monitor for clot formation.

    • Manage pain effectively.

    • Educate patients on lifestyle changes including quitting smoking, controlling blood pressure and cholesterol, and dieting.

    • Monitor for potential complications such as compartment syndrome, metabolic changes, kidney failure, and hemorrhage.

RAYNAUD DISEASE & BUERGER'S DISEASE

Raynaud Disease

  • Risk Factors:

    • Cold exposure.

    • Emotional stress.

    • Gender: More common in women.

    • Age: Typically occurs in younger individuals.

  • Manifestations:

    • Pallor, cyanosis, then return rubor (redness) upon warming.

    • Symptoms include numbness, tingling, or burning pain, particularly during episodes of vasospasm.

    • Usually affects fingers.

  • Diagnosis:

    • Nail-fold Capillaroscopy to examine capillaries.

    • Rule out other causes of symptoms.

  • Treatment:

    • Emphasis on lifestyle modifications.

    • Use of Calcium-channel blockers to dilate blood vessels.

    • Digital sympathectomy can be considered.

  • RN Management:

    • Providing education and support for lifestyle modifications, ensuring patients avoid cold and tobacco, and advising them to dress warmly and wear gloves.

Thromboangiitis Obliterans (Buerger’s Disease)

  • Definition:

    • An autoimmune disease characterized by recurrent inflammation of blood vessels, leading to vascular occlusion.

  • Risk Factors:

    • Gender: More common in men; predominantly younger individuals.

    • Age: Typically affects younger adults.

    • Tobacco use: Strong association with the disease.

  • Manifestations:

    • Symptoms include pain, intermittent claudication, rest pain, ischemic ulcerations, color and temperature changes in extremities, paresthesia, and cold sensitivity.

  • Diagnosis:

    • Based on clinical symptoms and exclusion of other diseases.

  • Treatment:

    • Similar to PAD, focus on stopping tobacco use and potentially using sympathetic nerve blocks.

  • RN Management:

    • Educate patients on the importance of ceasing tobacco use and referring them to cessation programs.

ANEURYSMS

Definition and Characteristics

  • Aneurysm:

    • An outpouching (ballooning) of the vessel wall, localized and permanent.

  • Common locations include:

    • Thoracic arch (25% of cases).

    • Abdominal aorta (75% of cases).

    • Larger aneurysm sizes pose a greater rupture risk.

Types of Aneurysms

  • Damage to medial layer of the vessel wall leads to different classifications:

    • True Aneurysms:

    • Fusiform Aneurysms (type A): Entire circumference of the vessel dilates.

    • Sacculated Aneurysms (type B): Outpouching on one side.

    • False Aneurysms (type C): Results from a tear in the arterial wall that leads to a hematoma.

RISK FACTORS FOR ANEURYSMS

  • Age

  • Gender: More common in men.

  • Conditions:

    • Hypertension (high blood pressure).

    • Hyperlipidemia (high lipid levels).

    • Coronary Artery Disease (CAD).

  • Peripheral Artery Disease (PAD) of lower extremities.

  • Obesity

  • History of Stroke

  • Smoking: Considered a major risk factor.

  • Family History: Genetic predispositions.

MANIFESTATIONS

  • Thoracic Aneurysm (TAA):

    • Often asymptomatic, but can cause:

    • Chest or back pain.

    • If situated in ascending or aortic arch: may induce Transient Ischemic Attacks (TIAs), angina, dysphagia, hoarseness, or cough.

    • Pressure on the superior vena cava leads to jugular venous distention and facial edema.

  • Abdominal Aneurysm (AAA):

    • Typically asymptomatic and often incidentally detected during routine examinations.

    • Presentation includes:

    • Pulsating mass in the periumbilical area.

    • Bruit heard upon auscultation.

    • Compression of adjacent structures causing back pain, epigastric pain, or altered bowel habits (constipation).

    • Intermittent claudication if blood flow is affected.

COMPLICATIONS OF ANEURYSMS

  • Rupture:

    • Can occur in the retro-peritoneal space, where bleeding may initially be controlled but leads to significant risks like Cullen's sign and Grey Turner’s Sign.

    • Rupture within thoracic or abdominal cavity may result in massive hemorrhage, shock, and high mortality rates.

    • Smokers are at the greatest risk for rupture due to weakened vascular walls.

DIAGNOSTICS FOR ANEURYSMS

  • Imaging Techniques:

    • X-rays (chest & abdomen).

    • Ultrasound: Commonly used for screening.

    • CT Scan: Considered the most accurate for measurement.

    • MRI: Useful in certain circumstances.

    • Angiography: Provides images of the blood vessels to examine their condition.

MEDICAL MANAGEMENT OF ANEURYSMS

  • Goals: Prevent the risk of rupture.

  • Conservative Treatment Options:

    • For small aneurysms (4-5.4 cm), modification of risk factors is essential.

    • Lower blood pressure.

    • Regular monitoring.

  • Surgical Interventions:

    • Recommended for asymptomatic aneurysms larger than 5.5 cm.

    • Implemented more urgently for patients with genetic disorders or rapidly expanding aneurysms.

    • Symptomatic patients represent a high rupture risk and may require earlier surgical intervention.

SURGICAL PROCEDURES FOR ANEURYSMS

  • Open Aneurysm Repair: Direct surgical method to fix the aneurysm.

  • Endovascular Graft Procedure: Less invasive; involves placing a graft within the blood vessel.

  • Complications during or after the procedure may include:

    • Endoleak: Blood leaking back into the old aneurysm.

    • Growth of the aneurysm above or below the repair graft.

    • Occlusion of the artery.

    • Bleeding.

    • Possible rupture.

    • Dissection (tearing of the vessel).

EMERGENCY REPAIR COMPLICATIONS

  • Intra-abdominal Hypertension: Pressure buildup within the abdomen that can lead to impaired blood flow to organs, potentially resulting in multiple organ failure (Abdominal Compartment Syndrome).

RN MANAGEMENT OF ANEURYSMS

  • Conduct thorough cardiovascular assessments.

  • Monitor for signs of rupture:

    • Diaphoresis, pallor, tachycardia, hypotension, severe pain, changes in level of consciousness, and presence of a pulsating umbilical mass.

  • Gather baseline vital signs for postoperative comparison.

  • Assess peripheral pulses and renal status.

  • Observe neuro status.

ACUTE CARE - PRE AND POST PROCEDURE

  • Preoperative Care:

    • Provide emotional support and education to the patient.

  • Postoperative Management:

    • Monitor graft patency and ensure adequate blood pressure.

    • Assess cardiac status and peripheral perfusion.

    • Monitor for infection, gastrointestinal status, neuro status, and renal perfusion.

    • Follow bed rest orders and watch for post-implantation syndrome.

AORTIC DISSECTION

Definition

  • Aortic dissection is NOT considered a type of aneurysm.

  • Defined as the formation of a false lumen between the intima (inner layer) and the middle layers of the arterial wall.

    • Type A: Involves the ascending aorta and aortic arch.

    • Type B: Begins in the descending aorta.

RISK FACTORS FOR AORTIC DISSECTION

  • Gender: More common in males.

  • Age: Typically occurs in individuals 60-70 years old.

  • Medical History:

    • Atherosclerosis.

    • Pre-existing aortic or congenital heart diseases.

  • Lifestyle Factors:

    • Smoking.

    • Use of cocaine or methamphetamine.

  • Hypertension: A significant contributor to risk.

MANIFESTATIONS OF AORTIC DISSECTION

  • Symptoms often include:

    • Abrupt onset of severe anterior chest pain.

    • If the arch is involved, may result in neurological deficits due to compromised blood flow.

    • Can lead to interruption of coronary artery blood flow, causing angina, myocardial infarction, or left heart failure.

    • Acute Type A Dissection: Patients often report pain radiating to the back, abdomen, or legs.

DIAGNOSTICS FOR AORTIC DISSECTION

  • Diagnostic Testing (similar to those used for aneurysm):

    • ECG: To rule out myocardial infarction (MI).

    • Chest X-ray: Initial assessment tool.

    • CT Scan: Critical for diagnosis and planning treatment.

    • MRI: Also useful in assessing the structure of the aorta.

    • Transesophageal Echocardiogram: Important for visualization of the aorta.

MEDICAL MANAGEMENT OF AORTIC DISSECTION

  • Goals: For Acute Type A Dissection:

    • Control heart rate and blood pressure to prevent extension of the dissection by reducing myocardial contractility.

    • Utilize pain management, with morphine often preferred.

    • Surgical repair is typically required.

  • Conservative Management (for Type B):

    • Focus on pain relief, heart rate and blood pressure control, cardiovascular risk reduction, and close monitoring.

    • Endovascular repair can be warranted.

NURSING MANAGEMENT OF AORTIC DISSECTION

  • Preoperative Planning:

    • Position patient in semi-Fowler’s to alleviate pressure.

    • Create a quiet environment to reduce anxiety and pain.

    • Continuous heart monitoring and administration of IV antihypertensives.

  • Postoperative Care:

    • Follow similar management protocols as for aneurysms.

    • Include routine discharge teaching regarding therapeutic regimens and follow-up.

COMPLICATIONS OF AORTIC DISSECTION

  • Cardiac Tamponade:

    • Occurs when blood from the dissection leaks into the pericardial sac, compressing the heart.

    • Common manifestations include:

    • Chest pain.

    • Anxiety and restlessness.

    • Confusion due to decreased cardiac output.

    • Muffled heart sounds.

    • Tachypnea and tachycardia.

    • Narrowed pulse pressure and pulsus paradoxus.

  • Additional Complications:

    • Hemorrhage: Blood may accumulate in mediastinal, pleural, or abdominal cavities.

    • Rupture can lead to exsanguination and death.

    • Occlusion of blood supply to vital organs, risking spinal cord, renal, and abdominal ischemia.

ACUTE & CHRONIC VENOUS DISORDERS

PHLEBITIS

  • Definition: Inflammation of a vein, often accompanied by a blood clot.

  • Medical Management:

    • Slow infusion of IV medications or a change of drugs may be necessary.

    • Discontinue IV access at this site if inflammation occurs; opt for warm, moist heat applications and NSAIDs for relief.

  • RN Management:

    • Educate on the importance of IV catheter monitoring, focusing on pain management and signs of inflammation.

  • Risk Factors:

    • Use of IV catheters, infusion of irritating drugs, and site location.

  • Manifestations:

    • Pain/tenderness, localized warmth, erythema, and swelling.

VARICOSE VEINS

  • Diagnostic Tools:

    • Duplex scan or air plethysmography to evaluate venous function.

  • Medical Management:

    • Use of veno-active drugs.

    • Consider ablation or sclerotherapy procedures.

  • Nursing Care:

    • Prevention strategies focus on avoiding increased venous hypertension.

    • Postoperative care includes managing activity, pain relief, and monitoring for bleeding or complications like superficial venous thrombosis.

  • Risk Factors:

    • Includes trauma, history of venous thromboembolism (VTE), gender, profession, and genetic predisposition.

  • Manifestations:

    • Symptoms can include heavy, aching legs, itching, burning, tingling sensations, and nocturnal leg cramps.

VENOUS THROMBOSIS

  • Definition: Formation of a blood clot characterized by vein inflammation.

  • Types:

    • Superficial Vein Thrombosis: Involves greater or lesser saphenous veins.

    • Deep Vein Thrombosis (DVT): Usually occurs in iliac or femoral veins, leading to potential complications such as Venous Thromboembolism (VTE), which includes DVT and Pulmonary Embolism (PE).

RISK FACTORS FOR VENOUS THROMBOSIS (VIRCHOW’S TRIAD)

  • Venous Stasis: Stagnation of blood flow, commonly in the elderly, during prolonged immobility, atrial fibrillation, or post-orthopedic surgery.

  • Endothelial Damage: Associated with surgical procedures in the abdomen/pelvis, fractures of the hip/leg/pelvis, irritating IV fluids, or central lines (PICC lines).

  • Hypercoagulability: Increased likelihood of blood clot formation due to tobacco use, certain cancers, oral contraceptives (especially in smokers), dehydration, malnutrition, and pregnancy.

SUPERFICIAL VEIN THROMBOSIS

  • Symptoms: Palpable, firm cord-like vein, itchy, tender, and painful; warmth and redness present; mild swelling is rare.

  • Diagnostics: Ultrasound techniques are typically utilized.

  • Treatment: Involves NSAIDs for pain management, usage of compression stockings, and elevating the affected limb along with mild exercise.

  • Complications: If left untreated, it can progress to deeper veins and subsequent VTE.

VENOUS THROMBOEMBOLISM (VTE)

  • Primarily affects deep veins in the legs (femoral), pelvis (iliac), arms, and lungs (pulmonary system).

  • Manifestations:

    • Can cause pain and tenderness in the limb.

    • Unilateral edema, warmth, erythema, and elevated body temperature.

  • Diagnostics: Utilizes ultrasound and D-Dimer blood assays for confirmation.

PREVENTION & PROPHYLAXIS

  • Early mobilization and aggressive interventions are critical.

  • Compression Stockings, sequential compression devices (SCDs), and anticoagulant therapy are commonplace.

  • Short-term options include unfractionated or low-molecular-weight heparin.

  • Long-term management includes drugs such as Warfarin or other oral anticoagulants.

ANTICOAGULANT THERAPY

  • HEPARIN:

    • Mechanism: Inhibits clotting factors including thrombin.

    • Toxicity Symptoms: Hematuria, melena, petechiae, ecchymoses, and bleeding from gum or mucous membranes.

    • Treatment: Immediate cessation of drug and administration of protamine sulfate (1 mg of protamine can neutralize 100 units of heparin).

  • WARFARIN:

    • Mechanism: Inhibits vitamin K-dependent clotting factors II, VII, IX, and X.

    • Commonly prescribed oral anticoagulant.

    • Monitoring Required: Regular testing of prothrombin time/international normalized ratio (PT/INR).

    • Dietary Considerations: Patients should avoid foods high in Vitamin K (e.g., green leafy vegetables).

    • Reversal: Vitamin K can be used in emergencies.

  • Patient Education: Patient should be informed about the risk of bleeding.

PERTINENT LAB VALUES

  • Platelet Count: Normal range 150,000 – 450,000.

  • PT (Prothrombin Time): Normal 10-12 seconds (evaluates blood's ability to clot).

  • PTT (Partial Thromboplastin Time): Normal 25-35 seconds; therapeutic range is 45-70 seconds (evaluates effectiveness of heparin).

  • INR (International Normalized Ratio): Normal 0.75-1.25; therapeutic 2-3 (important for Warfarin patients).

TREATMENT FOR VTE

  • Thrombolytic Therapy: Aimed at reducing acute symptoms and improving blood flow in deep veins.

  • Surgery: Clot removal or placement of filtration devices may be necessary.

  • Interventional Radiology Procedures may be implemented for persistent VTE.

NURSING MANAGEMENT FOR VTE

  • In acute situations, nursing goals focus on preventing emboli and minimizing inflammation.

  • Regular monitoring of vital signs for signs of bleeding.

  • Examination of urine and stools for blood presence.

  • Regular assessment of labs including platelets, PT, PTT, and INR.

  • Takes precautions during venipunctures to minimize risks.

  • Frequent repositioning of the patient but ensuring safe mobility to minimize stasis.

  • Teaching patients about risk factor modification and the significance of continual lab monitoring and medication education.

VTE COMPLICATIONS

  • Common complications include Pulmonary Embolism and Post-thrombotic syndrome, which can occur in up to 70% of patients leading to chronic inflammation and venous hypertension.

  • Clinical Signs include: persistent edema, development of spider veins, color changes in the legs, and atrophie blanche (white scar tissue formation).

LYMPHATIC DISORDERS

LYMPHANGITIS

  • Definition: Inflammation of the lymphatic vessels.

    • Symptoms may include red streaks along arms or legs and tender lymph nodes indicating acute lymphadenitis.

  • Can lead to necrosis or abscess formation (suppurative lymphadenitis).

  • Typically treated using antibiotics.

  • Recurrences may indicate progressive lymphedema; therefore, prevention through compression stockings is advocated.

LYMPHEDEMA

  • Definition: Swelling of extremities caused by excess accumulation of interstitial fluid due to obstructions in lymph channels.

    • Primary Lymphedema: Congenital malformation.

    • Secondary Lymphedema: Results from acquired obstructions.

  • Manifestations:

    • Early stages may present as soft, pitting edema.

    • Late-stage or advanced lymphedema results in thick, firm, non-pitting edema.

    • Elephantiasis: A chronic advanced condition leading to significant swelling, recurrent infections, residual edema, chronic fibrosis, thickening of skin tissue, and hypertrophy (enlargement) of the skin.

DIAGNOSTICS FOR LYMPHEDEMA

  • Clinical evaluation for presentation and exclusion of other potential causes.

  • Use of lymphangiography or lymphoscintigraphy may be included for assessment.

MEDICAL MANAGEMENT FOR LYMPHEDEMA

  • Treatment Options:

    • Use of Furosemide (Lasix); antibiotics may prevent infection.

    • Exercise: Encouraging movement can aid lymphatic flow.

    • Compression therapy: Application of compression garments is essential.

    • Surgery: Possible excision of affected tissue with skin grafts or surgical relocation of superficial lymphatic vessels.

RN MANAGEMENT FOR LYMPHEDEMA

  • Focus on skin care, monitoring for signs of infection, and promoting the use of compression wraps.

  • Monitor for complications such as flap necrosis, hematoma, abscess, and cellulitis.

CELLULITIS

  • Definition: An infection of the skin and subcutaneous tissues leading to limb swelling.

  • Manifestations:

    • Acute localized swelling, redness, pain.

    • May present with generalized fever, chills, and sweating.

  • Diagnostics: Blood or tissue samples may require culture for identifying causative organisms.

  • Medical Management:

    • Mild Infections: Treated with oral antibiotics.

    • Severe Infections: Administered IV antibiotics to mitigate systemic effects.

  • RN management:

    • Monitor for worsening infection and elevation of the affected extremity to aid lymphatic drainage.

    • Application of moist heat adjunctive to the treatment.

    • Continuous education on skin and foot care adherence is pivotal.

NURSING DIAGNOSES RELATED TO PERIPHERAL VASCULAR DISORDERS

  • Common nursing diagnoses include:

    • Ineffective peripheral tissue perfusion.

    • Activity intolerance.

    • Risk for impaired walking.

    • Risk for impaired skin/tissue integrity.

    • Acute pain/impaired comfort.

    • Risk for impaired physical mobility.

    • Deficient knowledge regarding disease management and prevention.

    • Risk for bleeding complications associated with anticoagulant therapy.

    • Chronic pain management strategies.

    • Disturbed body image due to physical changes.

Conclusion

  • Vascular disorders encompass a wide range of conditions with significant health implications requiring comprehensive understanding, diagnostic acumen, and effective management strategies across the care continuum. As nursing professionals, thorough assessment and patient education remain foundational in enhancing patient outcomes in individuals affected by these complex vascular issues.