Aortic Aneurysm Repair

What is Aortic Aneurysm Repair?

An aortic aneurysm is a weakened, bulging section in the aorta—the primary blood vessel conveying oxygenated blood from the heart to the rest of the body. Aneurysms can occur in the chest (Thoracic Aortic Aneurysm - TAA) or abdomen (Abdominal Aortic Aneurysm - AAA). If left untreated, progressive enlargement can cause sudden rupture, resulting in massive internal hemorrhage. Surgical repair replaces or reinforces the weakened arterial wall using a durable synthetic graft.

Who Needs Aortic Aneurysm Repair?

Repair is strongly recommended when aneurysm size or growth rate exceeds safe thresholds.

Key clinical indicators include:

• Abdominal Aortic Aneurysm (AAA) diameter measuring ≥ 5.5 cm in men or ≥ 5.0 cm in women.
• Thoracic Aortic Aneurysm (TAA) diameter measuring ≥ 5.5 cm (or ≥ 4.5-5.0 cm in connective tissue disorders like Marfan syndrome).
• Rapid aneurysm growth rate (>0.5 cm in 6 months or >1 cm in a year).
• Symptomatic aneurysms causing persistent severe back, flank, chest, or abdominal pain.
• Acute aortic dissection or impending rupture (emergency surgical indication).

Types of Repair Techniques

• Open Surgical Repair: The traditional approach involving a large abdominal or chest incision to open the bulging aorta directly and sew a Dacron or PTFE synthetic graft inside.
• EVAR (Endovascular Aneurysm Repair): A minimally invasive approach for abdominal aneurysms where a stent-graft is guided through femoral leg arteries and expanded inside the aneurysm.
• TEVAR (Thoracic Endovascular Aneurysm Repair): Endovascular stent-graft placement specifically tailored for thoracic aortic aneurysms or dissections.
• Complex Fenestrated / Branched EVAR (FEVAR): Custom-designed stent-grafts with tailored openings for renal and visceral branch arteries in complex neck anatomies.

Benefits of Aortic Aneurysm Repair

1. Elimination of the risk of sudden, fatal aortic rupture.
2. Complete resolution of back, flank, and abdominal discomfort caused by aneurysm expansion pressure.
3. Minimally invasive options (EVAR/TEVAR) offer short recovery times for high-risk patients.
4. Long-term durability and structural protection of the body's primary arterial trunk.

What to Expect Before Surgery?

Rigorous vascular mapping and anatomical planning are mandatory:

• Triple-Phase CT Angiography: Millimeter-thin slice scan to measure aneurysm neck length, angle, wall calcification, and access vessel diameter.
• Cardiopulmonary Assessment: Stress testing, echocardiogram, and pulmonary function tests to gauge anesthesia safety.
• Renal Protection Protocol: Pre-procedural hydration to mitigate contrast-induced nephropathy.
• Blood Cross-Matching: Ensuring immediate availability of matched blood products for emergency open surgery.

Complete Procedure

The surgical steps depend on the selected modality:

Open Surgical Repair:

1. General anesthesia and midline abdominal or left thoracoabdominal incision.
2. Cross-clamping the aorta above and below the aneurysm segment.
3. Incising the aneurysm sac and clearing internal thrombus/clots.
4. Sewing a synthetic tubular or bifurcated graft onto healthy native aortic walls.
5. Re-establishing blood flow, verifying arterial pulses in legs, and wrapping the aneurysm sac over the graft.

EVAR / TEVAR Procedure:

1. Local or regional anesthesia with small groin incisions over femoral arteries.
2. Threading delivery catheters containing collapsed stent-grafts under fluoroscopic X-ray.
3. Precisely positioning and deploying the main body and limb components inside the aneurysm sac.
4. Inflating molding balloons to seal graft edges against healthy vessel walls, excluding the aneurysm sac from pressurized blood flow.

What to Expect During Surgery?

EVAR/TEVAR takes approximately 1.5 to 3 hours, whereas Open Surgical Repair takes 3.5 to 6 hours. Intensive monitoring of spinal cord perfusion, renal blood flow, and blood pressure is maintained throughout.

Open Surgical Repair vs EVAR / TEVAR

Success Rate and Safety

Elective aneurysm repair carries a success rate exceeding 95-98%. Endovascular repair (EVAR) offers a 30-day procedural mortality rate under 1-2% in suitable candidates.

Aortic Aneurysm Repair Cost Estimate

Disclaimer: Endovascular stent-grafts (GORE, Medtronic, Cook) represent a significant portion of procedural costs.

Recovery Guide & Post-Operative Care

Recovery Timeline

• Day 0-2: Intensive Care monitoring; blood pressure control and hourly limb pulse checks.
• Day 3-5: Ward mobilization; transition from IV to oral pain medications (EVAR patients discharged by Day 3).
• Week 2-4: Home rest; avoiding heavy lifting or straining.
• Week 6-8: Open surgical wound healed; return to light work routines.
• Month 1 & 12: Post-EVAR CT Angiography scan to check graft placement and rule out endoleaks.

Post-Op Precautions & Care

• Strict Lifting Restrictions: Do not lift objects weighing >5 kg for 6 to 8 weeks post-open surgery to prevent incisional hernia formation.
• Blood Pressure Management: Keep systolic blood pressure under strict target limits to minimize graft stress.
• Lifelong Surveillance (EVAR/TEVAR): Mandatory annual CT angiograms or contrast ultrasound checks to ensure no blood leaks back into the excluded aneurysm sac (endoleak).
• Smoking Cessation: Smoking accelerates arterial wall degradation and must be stopped completely.