Vaping Before Surgery: What to Tell Your Anaesthetist

If you have an operation coming up and you vape, the single most useful thing you can do is say so. Not on the form, in the room: “I vape, this is the strength, this is roughly how much a day.”

That sentence changes how your airway is managed, how your pain relief is planned, and how your surgeon reads your healing. It is clinical information, not a confession, and the team has heard it many times before.

Why does the anaesthetist ask about vaping?

Four reasons, and they are worth knowing because they are all mechanisms rather than opinions.

Airway reactivity. General anaesthesia involves instrumenting an airway that is already irritable in regular smokers and vapers. Aerosolised propylene glycol, glycerine and flavouring compounds irritate the airway lining; more reactive airways mean a higher chance of coughing, laryngospasm and oxygen desaturation around induction and waking. This is the single biggest reason the question is on the form.

Vasoconstriction and healing. Nicotine narrows small blood vessels. Healing tissue needs blood flow, and blood flow is how oxygen reaches a wound edge. The connection between smoking and poor wound healing, wound breakdown and surgical site infection is well established, and nicotine is a major part of the mechanism. Surgeons doing skin flaps, joint replacements, spinal fusions and any reconstructive work tend to be strictest about this for exactly that reason.

Cardiovascular load. Nicotine raises heart rate and blood pressure. That is manageable in a healthy person, and it is one more variable in someone whose heart is already being asked to cope with surgery.

Carbon monoxide, if you also smoke. Dual use is the most common real-world pattern, and it is the one that matters most here. Carbon monoxide from cigarettes binds haemoglobin and reduces the oxygen your blood can carry. It clears within about twelve hours of the last cigarette, which is why even a single smoke-free night before surgery is worth something.

How long before surgery should you stop?

The clearest guidance comes from tobacco research, and it is consistent: stopping at least four weeks before an operation is associated with meaningfully fewer respiratory and wound complications, and the benefit grows with longer abstinence. The WHO published a review to this effect, and national anaesthesia bodies give similar advice. Cochrane reviews of preoperative smoking cessation programmes find that structured support before surgery both increases the chance of quitting and reduces complications.

Vaping has not been studied at that scale — the products are too new for four-week preoperative outcome trials. What clinicians do is reason from mechanism: same nicotine, same vasoconstriction, plus an inhaled irritant. Most treat it accordingly.

Practically, this gives you a ladder rather than a deadline:

• Four weeks or more. The target. Airway reactivity settles, and healing tissue starts the operation with normal blood flow.
• One to two weeks. Still worthwhile. Cough and airway irritation from vaping typically settle within days to two weeks of stopping.
• The night before. Small but real. Nicotine’s vessel-narrowing effect is short-lived, so a nicotine-free morning means better perfusion during the operation itself. If you smoke as well, this is the twelve hours that clears the carbon monoxide.

If your surgery is next week, none of this is a reason to give up on the idea. Take whichever rung you can reach.

What about fasting rules and the morning of the operation?

Ask, and follow what your specific unit tells you. Fasting instructions vary, and this is genuinely not something to reason out yourself.

Many units treat vaping the way they treat smoking and ask you to stop from midnight, both for airway reasons and because nicotine can increase gastric acid secretion. Nicotine gum and pouches sit in an awkward place under nil-by-mouth rules — some teams allow a patch and not an oral product, precisely because a patch involves swallowing nothing.

If you are worried about being in withdrawal on the morning of your operation, say that at your pre-assessment appointment. A nicotine patch started in advance is a routine, unremarkable request, and it is a far better plan than a nervous puff in the car park.

What to tell them, exactly

Bring four facts. It takes fifteen seconds.

1. That you vape, and whether you also smoke or use pouches. Dual use is the detail most often left out and the one that matters most.
2. The nicotine strength in mg/mL or per cent — 20 mg/mL is 2 per cent.
3. Roughly how much per day, in pods, millilitres or puffs. Any of the three is useful; “a bit” is not.
4. When you last used it, on the day itself.

If you have already tried to stop and struggled, say that too. It is the fastest route to being offered actual support rather than advice.

Surgery is an unusually good quit window

This is worth naming, because it is a real opportunity that people tend to waste by dreading it.

The hardest part of stopping nicotine is days one to three: withdrawal peaks around day three and nicotine itself is essentially out of your system by about 72 hours. Surgery hands you that window under supervision, with a strong reason attached, in an environment where the device is not in your pocket and nobody expects you to step outside. Many hospitals will offer a patch and a conversation for free if you ask.

You also get an unusually clean motivation. Not “I should be healthier someday” but “this wound needs blood flow this fortnight.” Concrete beats abstract, and this is about as concrete as it gets.

Afterwards, the same logic runs on: nicotine slows healing for as long as it is in you, whether the tissue in question is a skin incision, a bone graft or a dental socket.

Most people who eventually quit for good tried more than once, and the attempts that stuck usually had a date and a reason rather than a mood. You have both.

Puff Counter is built for the measuring side of it: one tap per puff, an honest weekly average, then a daily ceiling that steps down from your own numbers — which is also the fastest way to arrive at a pre-op appointment able to answer the question accurately.

Your two-minute action today: count your puffs for one ordinary day and write the number down with your surgery date next to it. That single figure is what your anaesthetist actually wants, and it is the same figure any taper has to start from.