Complex Aortic Aneurysms: Why Planning Matters

Complex aortic aneurysm treatment begins with understanding the anatomy and the person, then comparing the risk of the aneurysm with the risk of treatment. The decision is more detailed than simply choosing a stent or open surgery.

In this video, Dr Andrew Choong, vascular and endovascular surgeon in Singapore, explains why early specialist assessment gives patients time to explore an appropriate strategy before an emergency develops.

What makes an aortic aneurysm complex?

An aneurysm is an abnormal enlargement of an artery. Aortic aneurysms may be complex when they lie close to important branch arteries, extend through both the chest and abdomen, have unusual anatomy, or occur after previous aortic surgery or stent-graft repair.

The branches supplying the kidneys and abdominal organs may affect where a repair can safely seal and how blood flow is maintained. Two aneurysms with similar diameters can therefore require very different plans. Our aortic disease guide provides the broader background.

What does careful planning involve?

Detailed imaging and measurements

Planning may involve CT imaging, three-dimensional reconstruction and precise measurements of the aorta and its branches. Previous scans and operation records are useful for understanding changes over time and any existing grafts.

Assessing overall health and priorities

Kidney function, heart and lung fitness, previous procedures and the patient’s goals all matter. The discussion should explain the likely benefits and risks of intervention, the alternative of surveillance, and the practical demands of recovery and follow-up.

Which treatment approaches may be considered?

The options depend on the affected part of the aorta and the individual anatomy:

• Fenestrated or branched repair: specialised stent grafts may incorporate openings or branches to maintain blood flow to important arteries. Some devices are custom manufactured for the patient’s anatomy. Read about fenestrated and branched EVAR.

• Open repair: open aortic surgery remains an important option when its balance of benefits and risks is appropriate.

• Hybrid approaches: selected cases may involve a combination of surgical reconstruction and endovascular treatment.

• Surveillance: monitoring may be appropriate when the risk of treatment outweighs the expected benefit of repair.

A more complex or custom device is not automatically the best choice. Suitability, treatment risks and the need for future review should be explained before a decision. After endovascular repair, ongoing stent-graft surveillance remains part of care.

Why seek an opinion before an emergency?

Planned review allows time to compare scans, consider different approaches and discuss the trade-offs. Seeking an early opinion does not mean that immediate surgery is necessary. It helps establish what should happen next and which changes should prompt earlier reassessment.

Sudden severe chest, back or abdominal pain, particularly with collapse or breathlessness, needs emergency assessment. Call 995 in Singapore and do not wait for a routine appointment.

Preparing for an aortic consultation in Singapore

Bring your scan images and reports, medication list and details of previous aortic procedures. For a planned assessment or second opinion, contact Andrew Choong Vascular Surgery at Mount Elizabeth Novena Specialist Centre. You can also watch this explanation in the aortic video collection.

Aortic Aneurysm vs Aortic Dissection: What’s the Difference?

An aortic aneurysm is an abnormal enlargement of the aorta. An aortic dissection is a tear in its inner lining that allows blood to separate the layers of the artery wall. They can occur separately or together. Both can be serious, but the diagnosis, urgency and treatment are different.

In this video, Dr Andrew Choong, vascular and endovascular surgeon in Singapore, explains why these terms matter when understanding an aortic diagnosis.

What is an aortic aneurysm?

The aorta is the body’s largest artery, carrying blood from the heart through the chest and abdomen. An aneurysm develops when part of it becomes abnormally enlarged, rather like a balloon.

An aneurysm in the abdomen is called an abdominal aortic aneurysm, or AAA. One in the chest is a thoracic aortic aneurysm. Some cause no symptoms and are found during imaging for another reason. The concern is that the weakened section may enlarge and eventually rupture. An aneurysm diagnosis does not, however, mean it has already burst.

What is an aortic dissection?

With a dissection, a tear in the inner lining allows blood to track between the layers of the aortic wall. This creates a second channel called a false lumen, alongside the original blood channel.

A dissection can disrupt blood flow to important organs and can lead to rupture. It requires a different assessment from simply measuring an enlarged aorta. Our aortic disease guide explains these conditions in more detail.

Can you have one without the other?

Yes. As the video explains, you can have an aneurysm without a dissection, and a dissection without an aneurysm. They can also coexist. A previously dissected aorta may enlarge over time, so follow-up remains important even after the initial event has been treated.

Rupture is another distinct term: it means blood escapes through the wall of the aorta. Neither “aneurysm” nor “dissection” automatically means rupture has occurred.

Why does the difference change treatment?

Aneurysm care

A stable aneurysm may be monitored with scans and treatment of relevant risk factors. Whether repair is appropriate depends on its location, size, growth, symptoms and the person’s overall health. Not every aneurysm needs an operation immediately.

Depending on the anatomy, options may include endovascular aneurysm repair (EVAR) for suitable abdominal aneurysms, thoracic endovascular aortic repair (TEVAR) for suitable disease in the chest, or open aortic surgery. These approaches are not interchangeable for every patient.

Dissection care

Suspected acute dissection needs urgent hospital assessment. A dissection involving the ascending aorta near the heart usually requires emergency surgery. Some uncomplicated dissections confined to the descending aorta are initially managed in hospital with medication and close monitoring; complications may require intervention. The scan findings and clinical situation determine the plan.

When should you seek emergency help?

Call 995 in Singapore for sudden severe chest, back or abdominal pain, particularly with collapse, breathlessness or sudden weakness. These symptoms may signal an aortic emergency or another life-threatening condition. Do not wait for a routine clinic appointment. Read more about aortic emergency awareness.

Who should discuss assessment or screening?

If you have a known aneurysm, previous dissection, a relevant family history or an abnormal scan, discuss an individual assessment and follow-up plan. Screening is based on risk; the video’s advice to seek assessment should not be taken to mean that everyone needs a scan.

For non-emergency concerns, contact Andrew Choong Vascular Surgery at Mount Elizabeth Novena Specialist Centre, Singapore. Bring any previous scan reports so the discussion can focus on your diagnosis and options. If you already have an aortic diagnosis, see how to arrange an aortic second opinion and prepare your existing scans. You can also watch the short explanation in the video library.

Keyhole Vascular Treatment | Endovascular Surgery

Endovascular treatment means treating a blood vessel from the inside. Through a small access point in an artery or vein, I can guide specialist instruments to the area that needs treatment. This is often described as “keyhole” or minimally invasive vascular surgery.

In this video, I introduce some of the tools used in modern vascular practice. The same small access point can support very different procedures, so it helps to understand the problem each tool is designed to address.

How do the instruments reach the blood vessel?

A small tube called a sheath provides access into the artery or vein. Guidewires and catheters can then be passed through it, with imaging used to guide their position. Depending on the condition, the treatment may involve balloons, stents, covered stent-grafts or devices designed to remove clot.

The access site and instruments are chosen for the anatomy and the intended procedure. The visible skin opening is only one part of the treatment: detailed planning and precise work take place inside the circulation.

How can a stent-graft treat an aneurysm?

An aneurysm is an abnormal enlargement of an artery. For a suitable aortic aneurysm, an endovascular stent-graft can create a channel for blood flow inside the diseased vessel. In my video, I describe this as a pipe within a pipe.

The graft is designed to seal against appropriate portions of the artery and exclude the aneurysm from the main blood flow. Whether this is possible depends on the shape, size and location of the aneurysm and the arteries used for access. You can read more in my aortic disease and aneurysm treatment guide.

Endovascular aneurysm repair also requires follow-up. Scans help check the graft and aneurysm over time, because treatment does not remove the need to monitor the remaining aorta.

What do balloons and stents do for narrowed arteries?

When an artery is narrowed or blocked, angioplasty uses a balloon to widen an appropriate segment. A stent may be used to support the treated vessel. The aim is to improve blood flow where the narrowing is causing a clinically important problem.

These techniques may be considered for selected patients with peripheral arterial disease, including some people with substantial walking limitation or threatened wound healing. Medication, risk-factor management and suitable exercise remain important; a scan showing narrowing does not automatically mean a stent is needed.

Can endovascular tools remove blood clots?

Some specialist devices can break up or remove clot through a catheter. Aspiration devices use suction; other mechanical systems work differently. The tool depends on what is blocking the vessel, where it is located and the patient's condition.

In selected cases of deep vein thrombosis or pulmonary embolism, a procedure to remove clot may be appropriate. It is not the standard answer for every blood clot. Anticoagulation and other treatments must be considered alongside the potential benefits and risks of an intervention.

Likewise, an artery blocked by longstanding plaque is not the same as a vessel containing a recent clot. Descriptions such as “drill” or “vacuum” are useful visual analogies, but they do not mean every blockage can or should be treated in the same way.

Does “keyhole” mean the procedure is minor?

No. A small access point can be used to treat a major vascular condition. Endovascular procedures can offer advantages for suitable patients, but they still carry risks and may require further treatment or ongoing surveillance. Some patients are better served by open surgery, a combined approach or medical management.

Before treatment, I consider the scans, overall health, clinical urgency and the outcome we are trying to achieve. I also discuss recovery, follow-up and alternatives so that the plan is understandable, rather than simply choosing the newest device.

Where can I discuss vascular treatment in Singapore?

For an individual opinion about vascular or endovascular treatment, contact Andrew Choong Vascular Surgery at Mount Elizabeth Novena Specialist Centre, #09-22, 38 Irrawaddy Road, Singapore 329563. Bring relevant scan reports and previous treatment information if available.

The tools are valuable when they solve the right problem. My role is to connect those options to your anatomy, symptoms and goals, and explain which approach is appropriate for you.

EVAR for Aortic Aneurysms: A Pipe Within a Pipe

EVAR treats a suitable aortic aneurysm from inside the blood vessel using a stent graft. A useful way to picture it is a pipe within a pipe: blood flows through a new lining designed to reduce pressure on the weakened aneurysm wall.

In this video, I introduce endovascular aortic repair and explain why it has become an important option for some patients. It is less invasive than open repair, but the right choice depends on the aneurysm, your overall health and the need for long-term follow-up.

What is an aortic aneurysm?

The aorta is the body’s main artery. An aneurysm is an abnormal enlargement of part of that artery, associated with weakening of its wall. Many aneurysms cause no symptoms and are discovered during a scan performed for another reason or through screening.

The concern is rupture, which can cause life-threatening internal bleeding. However, finding an aneurysm does not automatically mean an operation is needed. Smaller aneurysms may be monitored, with decisions guided by their size, growth, symptoms and the balance of treatment risks. Read more about aortic aneurysms and aortic disease.

How does EVAR work?

During EVAR, a stent graft is introduced through the arteries in the groin and positioned inside the aorta using imaging guidance. Access may be through small punctures or small incisions, depending on the vessels and the planned procedure.

The graft has a supporting framework and a fabric covering. It forms a channel through which blood can flow, with seals above and below the aneurysm in suitable anatomy. The aneurysm remains outside the graft, so the operation does not simply remove the enlarged artery.

The aim is to exclude the aneurysm from the main blood flow and reduce its risk of rupture. Whether this can be achieved safely must be assessed before treatment.

The EVAR treatment guide explains assessment, risks, alternatives and recovery in more detail.

Who may be suitable for EVAR?

A CT scan helps the vascular team evaluate the aneurysm and plan a repair. Important considerations include:

• The aneurysm’s location and shape: including its relationship to important branch arteries.

• Suitable sealing areas: where the graft can fit securely.

• Access through the groin arteries: their size, narrowing and tortuosity can matter.

• Your overall health: including kidney function, fitness and other medical conditions.

• Long-term care: including the ability to attend follow-up scans.

Some aneurysms need a more complex endovascular approach or open surgery. For others, continued surveillance is appropriate. These decisions form part of individual treatment planning.

How does EVAR compare with open repair?

For suitable patients, EVAR can offer a less demanding early recovery and lower short-term operative risk than open repair. Those early benefits do not mean it is the best option for everyone or that the aneurysm requires no further attention.

Open repair remains important. The discussion includes the expected benefits, procedural risks, durability and likelihood of needing further treatment. I would explain why an option fits your particular anatomy and circumstances rather than choose solely by the size of the incision.

Why are follow-up scans important?

After EVAR, scans check the graft’s position and whether the aneurysm remains effectively excluded. One issue they look for is an endoleak, meaning blood still reaches the aneurysm sac outside the graft. Some findings require monitoring; others may need another procedure.

Follow-up is therefore part of the treatment, even when you feel well. The schedule and type of scan depend on the repair and subsequent findings.

Should you discuss aneurysm screening?

In the video, I encourage people with a family history, and men over 55 particularly with smoking or high blood pressure, to discuss their risk. This is an invitation to an individual assessment, not a universal screening rule for everyone over 55. Screening recommendations vary by age, sex, smoking history and family history.

Ultrasound can assess the abdominal aorta when screening is appropriate. Sudden severe abdominal or back pain, especially with collapse, needs emergency care instead of a screening appointment. In Singapore, call 995 for a life-threatening emergency.

Aortic aneurysm assessment in Singapore

To discuss a known aneurysm or your screening risk, contact Andrew Choong Vascular Surgery at Mount Elizabeth Novena Specialist Centre, #09-22, 38 Irrawaddy Road, Singapore 329563.

This article provides general education and does not replace an individual medical assessment.

Aortic Aneurysm Screening: Why Men Over 55 Should Know This

An aortic aneurysm can develop quietly, without an obvious warning. Finding it before an emergency creates an opportunity to measure it, arrange appropriate surveillance and discuss treatment when the balance of risks justifies repair. For men with a smoking history, high blood pressure or a family history of aneurysms, understanding personal risk is a useful starting point.

What is an aortic aneurysm?

The aorta is the main artery carrying blood away from the heart. An aneurysm is an abnormal enlargement of part of this artery as its wall stretches and weakens. It can occur in the chest or the abdomen. An abdominal aortic aneurysm, often shortened to AAA, affects the section in the tummy.

These distinctions matter because the investigation and follow-up depend on the part of the aorta involved. An abdominal ultrasound is commonly used to look for an AAA, but it is not a complete screening test for every condition affecting the chest aorta. Read more about aortic disease and its assessment.

Why can an aneurysm be present without symptoms?

Many aneurysms do not cause pain or a noticeable change in day-to-day health. They may be discovered during an ultrasound or CT scan performed for another reason. Feeling well therefore does not reliably exclude an aneurysm, and waiting for symptoms is not a screening strategy.

The important distinction is between screening someone who feels well and investigating symptoms. New abdominal or back pain requires a clinical assessment appropriate to its severity; it should not simply be booked as a routine screening appointment.

Should every man over 55 have an ultrasound?

No single age threshold applies to everyone. The video’s invitation to men over 55 is a prompt to discuss individual risk, particularly where smoking or family history is relevant. It should not be read as a universal recommendation to screen every man at 55.

Population screening recommendations commonly focus on older men, particularly those with a smoking history. These recommendations help guide a discussion; they do not replace an assessment of your family history, other risk factors and previous scan findings.

In Singapore, a discussion with your doctor can establish whether an ultrasound is appropriate for your circumstances. Bring details of any close relative with an aneurysm, previous imaging and your smoking and blood-pressure history. A family history may justify a discussion earlier than a population screening age.

What happens if an aneurysm is found?

The next step is a plan based on its location, size, growth and any symptoms, alongside your overall health. A small aneurysm may be monitored with repeat imaging. Surveillance means scheduled reassessment, rather than ignoring the finding.

Blood-pressure management and stopping smoking are important parts of care. Your clinician can explain when the next scan is due and which symptoms require urgent attention. Keep a record of the measurements and follow-up arrangements so that changes can be interpreted over time.

Does treatment always mean open surgery?

No. Some aneurysms can be repaired from inside the arteries using a stent graft, an approach known as endovascular repair. Others are better suited to open surgery. Suitability depends on the aneurysm’s anatomy and the person’s health; an operation is not automatically needed just because an aneurysm is discovered.

Early detection does not remove all risk or guarantee a particular treatment. It gives the clinical team more information and time to consider the options. Our aortic awareness information explains why recognition and follow-up matter.

When is urgent help needed?

Sudden severe abdominal or back pain, collapse, loss of consciousness or severe breathing difficulty can signal a life-threatening emergency. Call 995 in Singapore for emergency assistance. Do not wait for a clinic appointment or drive yourself if you are seriously unwell.

Where can I discuss aneurysm screening in Singapore?

For a non-emergency discussion about risk assessment or an existing aneurysm, contact Dr Andrew Choong’s clinic at Mount Elizabeth Novena Specialist Centre, #09-22, 38 Irrawaddy Road, Singapore 329563. Bring previous scan reports and a medication list so that the consultation can focus on a suitable assessment and follow-up plan.

This article provides general education and does not replace an individual medical assessment.