"Why aren't you aspirating?" is one of the questions we are asked most often during our lives. It comes from patients and from other practitioners. On a recent TikTok Live from our clinic in Brentwood, our nurse Bina explained what aspiration is, why it is not a complete safety check on its own, and what matters more.
Miss B is our AI treatment guide. The footage of Bina is real, filmed live in clinic. Results vary.
What is aspiration?
Aspiration means pulling back on the plunger of the syringe before injecting, to see whether any blood is drawn into it. The idea is that if you see blood, the needle may be in a blood vessel, so you move before injecting.
Why it isn't the whole safety story
In the few seconds it takes to pull back on the plunger, the needle can move, sometimes by millimetres. That means a negative result does not guarantee the needle is still in a safe place when the filler goes in. A negative aspiration does not rule out a vascular occlusion, which is when filler blocks a blood vessel.
That is why we talk so much about anatomy and depth. Knowing where the vessels run, choosing the right depth and technique, and injecting slowly and in small amounts are all part of keeping a treatment safe.
Protocols matter most
Every clinic that injects filler should have clear emergency protocols and the training and products to act quickly if something goes wrong. If you are a patient, it is completely reasonable to ask your clinic about their emergency plan before you book.
If you're starting out as a practitioner
If you were taught to aspirate, keep doing it. Aspiration is not wrong. Just don't let it give you false confidence. Make sure your anatomy knowledge and your emergency protocols are solid, and keep learning.
Should the patient always be told?
Bina is clear on this: yes. If anything unexpected happens during a treatment, the patient should be told straight away and kept informed about everything that happens next. Good practitioners are open, even when it is uncomfortable.
Frequently asked questions
Is aspiration pointless then?
No. It can add information, but it is not a complete safety check on its own. Anatomy, depth, technique and emergency protocols matter more.
What should I ask my clinic before filler?
Ask who will treat you and how they are qualified, what product will be used, and what their plan is if a complication happens.
Can filler still move or block a vessel even with good technique?
Risks can be reduced but never removed completely, which is why training and emergency protocols are so important. We will talk you through the risks at your consultation.
Are you a clinic wanting more training?
We cover safety and emergency protocols in our masterclasses. Approved clinics can open trade accounts at 65medical.co.uk.
Book a consultation
If you have questions about filler safety, book a consultation at our nurse-led, CQC-registered clinic in Brentwood.
Results vary. Treatments are for adults aged 18 and over and are subject to a consultation.
Results vary from person to person. Every treatment starts with a consultation with a registered clinician.