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.