Will I be awake? Anaesthetic for RFA vein treatment

The short answer

Yes, usually awake — and for most people that turns out to be the part they worried about unnecessarily.

It is worth saying why this changed. Varicose vein surgery used to mean a general anaesthetic, an operating theatre and a recovery that took over a week. The techniques used now work from inside the vein through a needle puncture rather than by removing it, and they do not need you to be asleep. Using radiofrequency ablation means we can treat veins using local anaesthetic and you can walk out shortly after your procedure.

How do we perform it under local anaesthetic?

We use a combination of normal local anaesthetic where we make a small cut to introduce the RFA device and then use a tumescent fluid to surround, numb and protect the structures around the vein. The phrase sounds technical and the idea is simple. Rather than a single injection, a large volume of dilute local anaesthetic is placed in the tissue along the whole length of the vein being treated, guided by ultrasound.

It does three things at once. It numbs the full length rather than one point. It separates the vein from the skin and nerves nearby, which protects them. And it compresses the vein onto the treatment catheter, which makes radiofrequency ablation work better.

The injections themselves sting briefly — that is the honest part — and then the leg goes numb and heavy and stays that way through the procedure.

What it actually feels like

You are awake, lying down, able to talk. You feel pressure and movement rather than pain. Most people describe the oddest part as the sensation of fluid going in, and the strangest part as how unremarkable the rest of it is.

You will usually hear the ultrasound machine and the conversation in the room. There is no requirement to watch; plenty of people prefer to look at the ceiling and talk about something else entirely, and that is completely reasonable. There will always be somebody beside you to talk to you, explain things if you want or talk about something completely different.

Afterwards you get up and walk out. Walking is actively encouraged rather than discouraged.

Where spinal and general anaesthetic still fit

Local anaesthetic is the usual choice. A general anaesthetic may suit better where a great deal needs doing in one session, where both legs are being treated extensively, or where someone simply would much prefer being asleep and that preference is clear.

A spinal anaesthetic — numb from the waist down, awake but without sensation in the legs — is used for some procedures and is a middle option between the two.

None of these is a mark of a more or less serious operation. They are different ways of achieving the same comfort, and the right one depends on what the planned procedure is and on what suits you.

Why this matters more than it sounds

Avoiding a general anaesthetic is not just about convenience. It means no fasting beforehand, no anaesthetic grogginess afterwards, no need for someone to stay with you overnight, and a return to normal activity measured in days rather than weeks.

It also means the treatment is open to people for whom a general anaesthetic would carry more risk than the varicose veins do.

If the thought makes you anxious

It is well worth mentioning. Anxiety beforehand is one of the most common things patients raise afterwards, and almost always in the context of having been more worried than the experience warranted.

Knowing in advance that someone is apprehensive gives us a chance to make sure we can talk through things with you and plan for what you think will help. We have an excellent team of staff at all of our hospitals who will help make you feel relaxed, explain what to expect and be with you through the whole process.