Has your knee, elbow, or other joint suddenly become swollen, red, and painful? Sometimes it becomes so difficult to bend or straighten that joint. We get very worried at times like these. In fact, the main reason for this swelling and pain is the accumulation of unnecessary fluid inside the joint. So today we are talking about a simple and very useful treatment for this.
What is Arthrocentesis (Joint Aspiration)?
This name may sound like a big deal, but it's actually quite simple. Simply put, arthrocentesis involves inserting a small needle into an inflamed joint and removing excess fluid (joint fluid). This is also called ``Joint Aspiration''.
Imagine that when you fill a jar with water, it swells and becomes hard. When the liquid fills, the pressure inside the jar increases, which causes this severe pain. So when you remove that extra liquid, the jar gets a lot of relief, and both the pain and swelling decrease. Also, by testing this liquid that is removed (lab test), you can find out exactly what is causing the jar to swell.
How is this treatment done? It's very simple!
This is not a major surgery. It can be done in your doctor's office (OPD) or at a clinic. It doesn't require much advance preparation. These are the steps that are usually followed:
1. Cleaning: First, the doctor thoroughly cleans the skin where the needle will be inserted with an antiseptic solution.
2. Numbing: Next, a numbing cream is applied to the area, or a small injection is given to numb the area. This will help you not feel much pain.
3. Finding the right location: Sometimes the doctor may use a scanning device such as ultrasound or fluoroscopy to find the exact location of the junction.
4. Withdrawing the liquid: Then, a needle attached to a syringe is inserted into the junction and the priest carefully draws out almost all of the accumulated liquid. If there is a lot of liquid, the syringe can be changed and withdrawn.
5. Injection of medication (if necessary): After the fluid is drained, sometimes the doctor may inject painkillers or other medications (such as a ``cortisone shot'') into the joint through the same needle.
6. Sending for testing: The fluid sample that was taken out, if necessary, is sent to a laboratory to find the cause.
The entire process takes about 10 minutes , so there's no reason to worry about this.
What are the benefits of this?
Arthrocentesis is like killing two birds with one stone. It provides two benefits at once. One is therapeutic and the other is diagnostic.
Benefits as a treatment
- Immediate reduction in pain and swelling: As soon as the extra fluid inside the joint is removed, the pressure inside the joint decreases, giving you a great sense of relief. The pain is greatly reduced.
- Preparing the injection site: If you are giving an injection into the joint, first removing the excess fluid in this way will allow the injected medicine to penetrate better and work better. The following types of injections are usually given:
- Cortisone shots / steroid injections
- Platelet-rich plasma (PRP) injections
- Gel injections `(Viscosupplementation)`
How to help diagnose a disease
When the extracted synovial fluid is sent to the lab for testing, the exact cause of the joint swelling can be determined.
| What is tested in the liquid | Diseases that can be detected |
|---|---|
| Germs (bacteria, white blood cell count) | You can find out if there is an infection at the junction. |
| Blood (red blood cells) | You can find out if there has been any accident or injury to the joint and it is bleeding. |
| Crystals | You can tell if you have crystal deposits caused by conditions like gout or pseudogout. |
Are there any side effects or complications?
This is a very safe treatment. Complications are rare. These are the things that can happen:
- Infection: Germs can enter the piercing site, but this risk is much lower if the skin is properly cleaned.
- Bleeding: If the thorn hits and damages a small blood vessel, there may be some bleeding.
- Allergic reaction: Some people can have an allergic reaction to the numbing medicine or the injection. This is also very rare.
- Post-injection flare: There may be some increased pain and swelling in the joint for a few hours after the injection. However, this usually resolves on its own within a few days.
When will I feel relief after treatment?
After the fluid is drained, you will start to feel much better the next day, with much less pain and swelling. However, if you have a chronic condition like arthritis, the fluid may build up again over time. Your doctor will then decide if you need to have this treatment again.
After the treatment, the doctor will apply a small bandage to the area. He will also tell you to rest the joint for a day or two without putting too much pressure on it. When the report of the fluid sample sent to the lab comes back, the doctor will inform you about it.
If you experience these symptoms, call your doctor immediately!
There are usually no major problems after treatment. However, if you experience any of the unusual symptoms below, notify your doctor immediately.
| Feature to pay attention to | Description |
|---|---|
| Severe pain | If the pain does not subside even after taking painkillers, it keeps getting worse. |
| Redness, warmth, or swelling | If the area around the sting is red, feels hot to the touch, or has a rash . |
| Bleeding or discharge | If blood or other fluid continues to flow from the puncture site. |
| Fever or chills | If you feel feverish or have chills and shivers, this could be a sign of an infection. |
Take-Home Message
- Arthrocentesis is a very simple, 10-minute treatment for joint swelling and pain.
- This will remove the excess fluid that has accumulated at the junction and give you quick relief.
- This treatment not only reduces pain but also helps to pinpoint the exact cause of the swelling.
- The risk of this is very low. However, if you develop symptoms such as fever, severe pain, or redness after treatment, see your doctor immediately.
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