Point-of-care ultrasound (POCUS)

Rheumatological ultrasound can reveal a great deal that an examination alone cannot, including:

• Inflammation in the lining of a joint or in a tendon, sometimes before it is visible or easily felt
• Fluid within a joint, which can sometimes be drained
• Features that help distinguish one cause of joint pain from another, such as crystals
• The structures around a joint, helping guide treatment accurately

Because the ultrasound is done there and then, it can sharpen the diagnosis during the same conversation in which your symptoms are discussed. That often means a clearer answer sooner, and fewer separate trips for scans arranged elsewhere.

It also makes treatment more precise. Where an injection is appropriate, doing it under ultrasound guidance helps place the medication exactly where it is needed. You can read more about this on the ultrasound-guided injection page.

Having a point-of-care ultrasound is straightforward, and there is nothing you need to do to prepare. There is no fasting, no injection of dye and no special arrangements beforehand. It helps to wear loose, comfortable clothing that can be moved or rolled back easily, so the area of concern can be reached, and to be ready to point to where your symptoms are.

During the scan:

• A small amount of water-based gel is applied to the skin so the probe makes good contact. The gel can feel slightly cool, and it wipes off easily afterwards.
• A smooth handheld probe is moved gently over the area while the images appear on a screen.
• You may be asked to move or bend the joint a little, as seeing it in motion can add useful information.
• The only sensation most people notice is light pressure over a tender spot, and the scan can be paused at any time.

The scan uses sound waves rather than radiation, so there is nothing harmful about it. It is painless for almost everyone, fits naturally into the consultation rather than adding a long extra appointment, and can be repeated whenever it would help, including to check how a problem is settling over time.

There is no recovery time and no aftercare needed for the scan itself. Once the gel is wiped away you can carry on with your day as normal, and there are no restrictions on driving, work or activity.

The findings are usually explained to you within the same consultation, alongside your history and examination. Where the picture is more complex, or another test such as an MRI or a blood test would add something, the next steps are agreed with you before you leave.

Sometimes the scan shows a problem that would benefit from treatment in the same visit, such as drawing off fluid or placing an injection accurately. If so, those steps have their own brief aftercare, which is explained to you at the time. You can read more on the joint aspiration and ultrasound-guided injection pages. Any treatment is always discussed and agreed with you first, never assumed.

Bringing assessment, ultrasound and, where appropriate, treatment together in a single appointment is what makes a one-stop clinic possible. For many people this means that recognising a problem and beginning to address it can happen in the same visit, rather than over several. You can read more on the ultrasound clinic page.

Ultrasound is one part of a thorough assessment, used where it adds value, alongside your history, examination and any other tests that are needed.

Is a point-of-care ultrasound scan painful or harmful?

No. Ultrasound uses sound waves rather than radiation, so there is nothing harmful about it and no injection or preparation is needed. A small amount of gel is applied to the skin and a smooth probe is moved gently over the area. Most people find it comfortable, and pressing lightly over a tender spot is the only sensation you might notice. It can be repeated as often as needed without any concern.

How is point-of-care ultrasound different from a hospital ultrasound or an MRI?

The main difference is convenience and timing. A point-of-care scan is done by the rheumatologist during your consultation, so the findings are discussed with you straight away and there is no separate appointment elsewhere. It is excellent for looking at joints, tendons and soft tissues in real time, and for guiding injections. An MRI remains better for deeper structures or certain detailed questions, and may still be arranged if it would add something.

Will I get my results during the appointment?

Usually, yes. Because the scan is performed and interpreted there and then, the findings can be explained to you within the same consultation, alongside your history and examination. This often means a clearer answer sooner and fewer separate trips. Where the picture is more complex, or another test would help, the next steps are agreed with you before you leave.

Can I be treated in the same visit as the scan?

Often you can. Bringing assessment, ultrasound and, where appropriate, treatment into one appointment is what makes a one-stop clinic possible. If the scan confirms a problem that would benefit from an injection, this can frequently be carried out under ultrasound guidance during the same visit, placing the medication precisely. Treatment is never assumed, though; the plan is always discussed and agreed with you first.

Do I need to do anything to prepare for the scan?

Very little. There is no fasting, no contrast and no special preparation. It helps to wear loose, comfortable clothing that can be moved or rolled back easily so the area of concern can be reached, and to be able to point to where the symptoms are. Otherwise you simply come as you are, and the scan fits naturally into the consultation.