When chemotherapy leaks out of the vein

Call 911 or get emergency medical treatment if hives, rash or itching come with difficulty breathing or swallowing, or with swelling of the face, arms, hands, feet, ankles or lower legs. MedlinePlus names those as serious symptoms that need a doctor immediately or emergency care.

During an infusion, tell your nurse immediately if you feel burning or pain at the site. NCI's chemotherapy guide gives exactly that instruction. Do not wait for the bag to finish and do not wait for someone to walk past.

Call your care team the same day if, after treatment, you develop pain, itching, redness, swelling, blisters or sores where the medicine went in. MedlinePlus names those symptoms as things to report about vincristine, and lists swelling, pain, redness or burning at the injection site among cisplatin symptoms to report immediately.

Most infusions run without incident. This is not a common event, and the point of this article is not to make you dread the chair.

But some chemotherapy drugs are hard on tissue. MedlinePlus says of vincristine that if it leaks into surrounding tissue, it may cause severe irritation or damage.

That is the whole reason for the fuss. A drug that is doing its job inside a vein, carried away in the bloodstream, is in the wrong place if it seeps into the fat and muscle around the vein. Nurses call this extravasation.

Damage that is caught in minutes is a different situation from damage found the next morning.

An infusion nurse watches the site, checks the line and knows the drugs. What they cannot do is feel your arm.

The earliest sign of a leak is usually a sensation, not a sight. Burning. Stinging. An ache that was not there ten minutes ago. Tightness. By the time the skin visibly swells or reddens, time has passed.

So the job is yours: pay attention to the arm or the port site during the infusion, and say something the moment it changes. Not politely at the end. Not after you have decided whether it counts.

Nurses would far rather check a line twenty times for nothing than miss one real event. Nobody is annoyed by this. It is what they are there for.

The specific things MedlinePlus and NCI name are worth memorising because they are short:

• Burning
• Pain
• Itching
• Redness
• Swelling
• Blisters or sores at the injection site

Any of those during or after an infusion is worth reporting. If you are not sure whether the feeling counts, report it anyway and let a clinician decide.

Look at the site before bed and again in the morning. If something is developing, you want to notice on day one.

Take a photo if anything looks different, with the date, so you can show a change rather than describe one. If pain, redness, swelling or blistering appears in the days after treatment, that is a phone call, not a wait-and-see.

Ask your team whether the drugs you are receiving are the sort that damage tissue when they leak. Not every chemotherapy drug behaves the same way, and knowing which category yours falls into tells you how vigilant to be.

Ask too how to get attention fast in your particular infusion unit. Some places have a call button at each chair. Some rely on you catching someone's eye. Knowing the answer before you need it takes ten seconds and removes any hesitation later.