Master Specialist Vascular Surgery (VAS5291)
for DHA Speciality

Core Concepts

Specialist Vascular Surgery (VAS5291) encompasses the diagnosis and management of diseases affecting the arteries, veins, and lymphatic system, excluding intracranial and coronary vessels. The primary goal is to preserve limb and life, prevent stroke, and improve quality of life. Core pathologies include atherosclerosis (Peripheral Artery Disease - PAD, Aortic Aneurysms, Carotid Artery Disease), venous disorders (Deep Vein Thrombosis - DVT, Chronic Venous Insufficiency - CVI, Varicose Veins), lymphatic disorders, vascular trauma, and creation/maintenance of access for dialysis (AV fistulas). Key risk factors are smoking, diabetes mellitus, hypertension, dyslipidemia, advanced age, and family history. Modern vascular surgery integrates both open surgical techniques and minimally invasive endovascular approaches (e.g., angioplasty, stenting, endovascular aneurysm repair - EVAR).

Clinical Presentation

• Peripheral Artery Disease (PAD): Intermittent claudication (cramping pain in muscles during exertion, relieved by rest), rest pain (typically nocturnal, relieved by dependency), non-healing ulcers, critical limb ischemia (CLI - rest pain, tissue loss/gangrene), trophic changes (hair loss, brittle nails, shiny skin), diminished/absent pulses.
• Abdominal Aortic Aneurysm (AAA): Often asymptomatic (discovered incidentally on imaging/screening), pulsatile abdominal mass, abdominal/back pain (suggests expansion), hypotension and syncope (rupture).
• Carotid Artery Disease: Asymptomatic (cervical bruit), Transient Ischemic Attack (TIA) - amaurosis fugax (transient monocular blindness), unilateral weakness/numbness, dysphasia, dysarthria. Completed stroke.
• Deep Vein Thrombosis (DVT): Unilateral leg swelling, pain/tenderness (calf/thigh), warmth, erythema, prominent superficial veins.
• Chronic Venous Insufficiency (CVI)/Varicose Veins: Leg heaviness, aching, swelling (worse with standing), itching, skin discoloration (hyperpigmentation), lipodermatosclerosis, venous ulcers (typically medial malleolus).
• Acute Limb Ischemia (ALI): The 6 Ps - Pain, Pallor, Pulselessness, Paresthesia, Paralysis, Poikilothermia (cold limb). Rapid onset of severe symptoms.
• Thoracic Outlet Syndrome (TOS): Neurological (most common): pain/paresthesia in hand/arm (ulnar distribution). Venous: arm swelling, cyanosis (Paget-Schroetter syndrome). Arterial: coldness, pallor, arm claudication.

Diagnosis (Gold Standard)

• PAD: Ankle-Brachial Index (ABI) for screening. Duplex Ultrasound for localization/severity. Computed Tomography Angiography (CTA) or Magnetic Resonance Angiography (MRA) for detailed anatomical mapping and intervention planning. Digital Subtraction Angiography (DSA) is the gold standard for definitive diagnosis and can be therapeutic.
• AAA: Abdominal Ultrasound for screening and size measurement. CTA is the gold standard for detailed anatomical assessment, rupture evaluation, and pre-operative planning.
• Carotid Artery Disease: Carotid Duplex Ultrasound for screening and stenosis quantification. CTA/MRA for pre-operative planning.
• DVT: Compression Ultrasonography (CUS) is the gold standard. D-dimer assay for exclusion in low-probability patients.
• CVI/Varicose Veins: Duplex Ultrasound to map reflux and incompetent perforating veins.
• ALI: Clinical diagnosis is paramount. Duplex Ultrasound or CTA can identify the cause (embolus, thrombosis) and level of occlusion.
• Renal Artery Stenosis: Duplex Ultrasound for screening. CTA/MRA for diagnosis. Renal angiography is the invasive gold standard for definitive diagnosis and intervention.

Management (First Line)

• General (all vascular patients): Aggressive risk factor modification (smoking cessation, glycemic control, HTN control, dyslipidemia management), antiplatelet therapy (aspirin, clopidogrel), statins.
• PAD: Supervised exercise therapy, cilostazol. Revascularization (endovascular [angioplasty/stenting] or open bypass) for critical limb ischemia or disabling claudication refractory to conservative measures.
• AAA:
  • Small (<5.5 cm): Surveillance with ultrasound/CTA.
  • Large (≥5.5 cm, or symptomatic/rapid expansion): Elective repair (Endovascular Aneurysm Repair - EVAR or Open Surgical Repair). EVAR is often preferred in anatomically suitable patients.
  • Ruptured: Emergency open repair or EVAR (if hemodynamically stable and anatomically feasible).
• Carotid Artery Disease:
  • Asymptomatic (≥60% stenosis): Carotid Endarterectomy (CEA) or Carotid Artery Stenting (CAS) in selected patients.
  • Symptomatic (≥50% stenosis): CEA or CAS for stroke prevention, ideally within 2 weeks of event.
• DVT: Anticoagulation (e.g., LMWH, DOACs, Warfarin) for 3-6 months (or longer depending on risk factors). Inferior Vena Cava (IVC) filter for absolute contraindication to anticoagulation. Catheter-directed thrombolysis or thrombectomy for selected limb-threatening DVT.
• CVI/Varicose Veins: Compression stockings, elevation, lifestyle changes. Endovenous thermal ablation (laser/radiofrequency), sclerotherapy, or open surgery (ligation/stripping/phlebectomy) for symptomatic disease.
• ALI: Immediate systemic anticoagulation (heparin), pain control. Prompt revascularization (catheter-directed thrombolysis, surgical embolectomy, or bypass surgery) based on etiology, duration, and limb viability.
• Renal Artery Stenosis: Medical management (aggressive BP control, statins). Revascularization (angioplasty/stenting) considered for refractory hypertension or deteriorating renal function, especially in unilateral stenosis.