“General anaesthesia”
You'll be made fully unconscious and won't feel, hear, or remember the operation. An anaesthetist (or anaesthesiologist) stays with you the whole time, controlling your breathing, blood pressure and depth of sleep.
Your surgery & anaesthesia consent form: what you're actually signing
The form can look alarming — pages of risks and legal-sounding lines, handed to you minutes before surgery. Here's what each part really means, in plain English, so you can sign knowing what it says — and what to ask first.
Medically reviewed by
Dr. Saurabh Shukla, MBBS, DNB Anesthesiology
· Last updated June 2026
The one thing to know
Consent is a conversation, not just a signature. The form is a record that you
were told what's planned, the main risks, and the alternatives — and that you agreed. You're
allowed to ask questions, take your time, and decline parts of it. Don't sign anything you don't
understand yet.
Decode your form, line by line
Find the phrases below on your form to see what they mean. Tick “Ask about this” on anything you're unsure about — it builds a printable list of questions to take to your team. Nothing is saved or sent.
“Regional / spinal / epidural anaesthesia”
A specific part of your body is numbed (for example from the waist down) using an injection near the nerves or spine. You may be fully awake, lightly sedated, or asleep as well — they'll explain which.
“Sedation / monitored anaesthesia care (MAC)”
Medicine makes you relaxed and drowsy — sometimes lightly, sometimes deeply — but it isn't full general anaesthesia. Many people remember little or nothing.
“Risks include a sore throat / hoarse voice”
Common and temporary, usually from the breathing tube used during a general anaesthetic. It typically settles in a day or two.
“Damage to teeth, lips, crowns or dental work”
Uncommon, but the airway equipment sits near your mouth, so chips or damage to loose teeth or crowns can happen. Tell them about caps, crowns, veneers or loose teeth beforehand.
“Nausea and vomiting after surgery (PONV)”
Feeling sick after anaesthesia is common but very treatable. If you've been sick after previous anaesthetics or get travel-sick, say so — they can give extra anti-sickness medicine.
“Nerve damage, numbness or weakness”
Usually a small patch of numbness or tingling that recovers over days to weeks; lasting nerve injury is rare. The risk and what it means depend on your operation and anaesthetic.
“Awareness during anaesthesia”
The fear of waking up during surgery. Under modern general anaesthesia this is very rare — your depth of anaesthesia is monitored throughout. It is one of the most over-feared risks.
“Allergic or drug reaction”
Reactions to anaesthetic drugs are uncommon. Tell them every allergy you know about — to medicines, latex, foods, or sticky dressings — and any reaction a relative has had to anaesthesia.
“Blood clots (DVT / PE)”
Surgery and lying still raise the risk of a clot in the leg or lung. Your team lowers it with stockings, sometimes blood-thinning injections, and getting you moving early.
“In rare cases, serious harm or death”
Consent forms must list the most serious possible outcomes, even when they're extremely unlikely for a healthy person having routine surgery. Seeing it in writing is standard — it doesn't mean it's likely for you.
“I consent to any additional or unforeseen procedures that may be necessary”
This lets the surgeon deal with something they find during the operation that needs treating then and there, while you're already asleep — rather than waking you and operating again later. You can ask them to define limits, and you can cross parts out.
“Consent to blood transfusion / blood products”
Permission to give you blood if you lose enough during or after surgery. If you have beliefs or reasons to decline blood, say so before you sign — alternatives can sometimes be planned.
“Trainees / students may be involved in my care”
Teaching hospitals train doctors and nurses, supervised by senior staff. You're allowed to ask who will be doing your operation and anaesthetic, and to decline student involvement.
“Consent to photography / recording for records or teaching”
Permission to take clinical photos or recordings — for your medical record, or (separately) for teaching. Consent for teaching use is optional and you can decline it without affecting your care.
“Tissue or specimen retention / disposal”
Anything removed during surgery may be tested in a lab and then stored or disposed of according to policy. You can ask what happens to it.
“The anaesthetic technique is at the discretion of the anaesthetist”
The exact drugs and method are chosen by your anaesthetist on the day, based on your health and the operation — but they should still discuss the plan and your preferences with you.
“I have had the opportunity to ask questions”
By signing, you're confirming you were given the chance to ask and understood the answers. If you haven't — don't sign yet. Ask first. That's exactly what this line is for.
“No guarantee of a particular outcome”
Medicine can't promise a perfect result. This line sets expectations — it isn't a warning that something will go wrong.
The lines people worry about most
Two phrases cause the most anxiety. “…serious harm or death” is a required
worst-case disclosure, not a prediction — see our honest
anaesthesia risk reality-check. And
“awareness during anaesthesia” (waking up mid-surgery) is far rarer than people
fear — more in anaesthesia myths vs facts.
Your rights when you sign
- Ask anything — and have it answered in plain language before you sign.
- Take your time — you can ask for more time or to speak to the surgeon or anaesthetist first.
- Bring someone — a family member or friend can be with you, and you can ask for an interpreter.
- Decline parts — optional items like teaching photos or student involvement can be refused without affecting your care.
- Change your mind — you can withdraw consent any time before the procedure.
Good to know
Want a head start on the conversation? Our
questions to ask before surgery and the
tell-your-anaesthesiologist checklist pair
perfectly with this page.
Frequently asked questions
What am I actually signing on a surgery consent form?
You're confirming three things: that you understand what operation and anaesthetic you're having, that you've been told the main risks and alternatives, and that you agree to go ahead. It's a record of a conversation — informed consent is a process, not just a signature. If any part isn't clear, you're meant to ask before you sign.
Can I ask questions or take time before I sign?
Yes. You can ask anything, ask for more time, ask for an interpreter, and have someone with you. The line that says you 'had the opportunity to ask questions' exists precisely so you use it. If you're not ready, it's reasonable to say you'd like to talk to the surgeon or anaesthetist first.
What does 'consent to additional or unforeseen procedures' mean?
It allows the surgeon to treat something they discover during the operation that genuinely needs dealing with while you're already asleep — instead of waking you and arranging a second operation. You can ask them to explain what might come up for your specific surgery, and you can set limits or cross sections out before signing.
Can I cross things out or decline parts of the form?
Often, yes. You can decline optional items such as student involvement or use of photos for teaching, and you can ask to limit 'additional procedures', without losing your operation. Talk it through with your team and they can note your wishes — don't just strike things out silently.
Do I have to consent to a blood transfusion?
No. If you have religious or personal reasons to decline blood products, tell your team before signing. Depending on your operation, they may be able to plan blood-sparing techniques or alternatives. The key is to raise it early, not on the day.
Can I change my mind after signing?
Yes. Consent can be withdrawn at any time before the procedure, as long as you have the capacity to make the decision. Signing the form does not lock you in.