Joint aspiration

Joint aspiration can be helpful in a few situations:

• To relieve the pressure and discomfort of a tense, swollen joint
• To examine the fluid and help diagnose the cause, such as a crystal arthritis
• To help guide the right treatment based on what the fluid shows

Using ultrasound during the procedure means the joint and the needle can be seen in real time, so the fluid can be reached accurately, even where a joint is difficult to enter or the fluid is hard to feel. This makes the procedure more precise and, where an injection is also appropriate, allows it to be given accurately at the same time. You can read more on the ultrasound clinic page.

There is usually very little you need to do beforehand, and the steps are explained to you in advance.

• Tell us about your medication. It is particularly helpful to mention any blood-thinning medicine, such as warfarin or other anticoagulants, as this is sometimes relevant to how the procedure is approached. Bringing a list of what you take is useful.
• There is no need to fast. You can eat and drink as normal, and there is no special preparation of the joint required at home.
• Wear comfortable clothing that lets the affected joint be reached and examined easily.
• Getting home. A simple aspiration does not affect your ability to drive, so most people can drive themselves home, although you may prefer not to if the joint is one you rely on at the wheel.

If you have any concerns, or are unsure whether something you take is relevant, it is always best to ask beforehand. Whether aspiration is the right step is discussed with you first, as set out in the guide to your first appointment.

The skin over the joint is cleaned, and ultrasound is used to guide the needle. The procedure usually takes only a short time. Most people find it well tolerated, with a feeling of pressure rather than sharp pain, and any specific aftercare is explained to you at the time.

You can usually go straight home and carry on with your day. It is sensible to take it gently with the joint for a day or two and then build activity back up. Drawing off a tense, swollen joint often eases the pressure quite quickly.

As with any procedure involving a needle, infection is uncommon but possible. Seek advice rather than waiting if the joint becomes increasingly red, hot, swollen or painful, or if you feel feverish or generally unwell.

Where the fluid has been sent for examination, the results are discussed with you and used to guide the next step, and that step depends on what the fluid shows. Crystals may point to a condition such as gout or CPPD and pseudogout. Where a swollen joint would benefit, a steroid injection can sometimes be given at the same sitting, once infection has been considered and thought unlikely.

Because Dr Borukhson uses point-of-care ultrasound during the consultation, assessment and, where appropriate, aspiration can often take place within the same visit. This can speed up both relief and diagnosis. Whether aspiration is the right step is always discussed with you first.

Is joint aspiration painful?

Most people tolerate it well. The skin over the joint is cleaned first, and many describe a feeling of pressure rather than a sharp pain. A local anaesthetic can be used to numb the skin where helpful. Using ultrasound to guide the needle means the fluid can be reached accurately and the procedure kept brief, which tends to make it more comfortable. What to expect is explained to you beforehand.

What does the fluid tell you, and when will I get results?

Drawing off the fluid can ease a tense, swollen joint straight away, and examining it helps establish the cause. The sample can be checked for crystals, which point to conditions such as gout or pseudogout, and for signs of infection. Some findings are available quickly, while laboratory tests take a little longer. The results are discussed with you and used to guide the right treatment for your situation.

Why is ultrasound used during the procedure?

Ultrasound lets the joint and the needle be seen in real time, so the fluid can be reached precisely, even when a joint is awkward to enter or the fluid is hard to feel. This makes aspiration more accurate and, where a steroid injection is also appropriate, allows it to be placed correctly in the same sitting. Because Dr Borukhson uses point-of-care ultrasound during the consultation, assessment and aspiration can often happen in one visit.

What should I expect afterwards, and is there anything to watch for?

The procedure itself usually takes only a short time, and any specific aftercare is explained to you on the day. It is common to feel some mild soreness around the joint for a day or two, which generally settles. As with any procedure involving a needle, infection is uncommon but possible, so do seek advice if the joint becomes increasingly red, hot, swollen or painful, or if you feel feverish or unwell.

Do I always need fluid drained from a swollen joint?

Not always. Aspiration is one option, and whether it is the right step depends on what is causing the swelling and what you hope to achieve, whether relief, a diagnosis, or both. A specialist assessment, with ultrasound where helpful, can establish the cause and confirm whether drawing off fluid would add value. The plan is always discussed with you first, and aspiration is only carried out when it is genuinely useful for you.