Have you ever had a tooth pulled and the dentist injected a solution into your gum and only numbed that area? Or, when you went to stitch up a small wound, they only numbed the area around the wound? That's what we simply call 'Local Anesthesia'. It doesn't completely numb you, it only numbs the area where you're in pain. So, today we're going to talk about this clearly, just like you would explain it to a friend.
Simply put, what is Local Anesthesia?
Local anesthesia is a type of medication that doctors use to temporarily numb a small area of your body before minor surgery or a medical test. For example, they are used to numb a small area of skin on your hand, such as a part of your gum.
Unlike 'General Anesthesia' (full anesthesia) given during a major operation, you will not lose consciousness during this. You will be wide awake. But you will stop feeling pain. Sometimes, along with this numbing medicine, the doctor may also give you a mild sedative (sedation) to relax you and reduce your fear. It depends on what is being done and your condition.
How does this medicine work?
It's very simple. Let's say you cut your finger. Then that pain goes through the nerves in your finger to your brain as pain signals . When the brain understands that signal, you feel, "Oh, that hurts."
Local Anesthesia temporarily blocks the pain signals from the nerves in the area to the brain. It's like stopping a messenger. Then, the pain message doesn't reach the brain, so you don't feel the pain. But you may feel pressure, as if someone is pressing on the area.
The most important thing is that this does not affect your central nervous system and cause you to lose consciousness. You can hear and see everything that is happening around you.
Types of Local Anesthesia and When to Use It
These painkillers come in different forms. And they are used in different situations. Let's take a look at what they are.
| How to use | Examples and use cases |
|---|---|
| Creams/Ointments/Gels | To numb the surface of the skin. Sometimes, before giving an injection, rub the area to numb it. |
| Injections | The most common method. For things like extracting a tooth, stitching a wound, or taking a small piece of skin for testing (biopsy). |
| Sprays | To numb the back of the throat, for example before an endoscopy. |
| Eye drops | Before minor eye surgeries such as cataract surgery. |
| Skin patches | To relieve some long-term nerve-related pain. |
Commonly used drugs
Some of the local anesthetic drugs used by doctors are:
- Benzocaine
- Bupivacaine
- Lidocaine
- Ropivacaine
Sometimes, to make these medications last longer and increase safety, doctors add other drugs, such as epinephrine .
Do you need to get ready? Can you eat and drink?
Usually, for something minor, where only local anesthesia is given, you don't need to prepare anything special . You can eat and drink as usual.
However, remember that if your surgery involves the digestive system, or if there is a risk that you will need to be put under general anesthesia, your doctor may ask you to fast . So always follow your doctor's instructions exactly.
Be sure to tell your doctor about any allergies you have or if you have had any problems with anesthesia in the past. It's also a good idea to tell them if you have a fear of needles (trypanophobia) so they can take steps to make you more comfortable.
How long does it take for the tingling sensation to go away? Are there any side effects?
How long the effects of local anesthesia last depends on several factors.
- Where the medicine was injected
- Dosage of medication given
- Type of medication used
- Whether other drugs, such as epinephrine, were added
The numbness can usually last anywhere from 30 minutes to 12 hours or more. The numbness from a tooth extraction can last for about 5-7 hours. Your doctor will tell you about this in advance.
Minor side effects
These are very rare and usually not serious.
- A small bruise or soreness where the injection was given.
- Vertigo (feeling like you're spinning).
- Headache.
- Slightly blurred vision.
- Feeling like a muscle twitch.
- Tingling, pins and needles, lasting longer than expected.
If this is taking longer than expected, talk to your doctor.
Serious but very rare complications
The chances of these happening are very low , but it's important to be aware of them.
1. Allergic Reaction: Some people may have an allergic reaction to this medication. If this happens, it will appear shortly after the medication is given, so the medical team can treat it right away.
2. Local Anesthetic Systemic Toxicity (LAST): This is a very rare condition. It occurs when too much local anesthetic enters the bloodstream. Symptoms can appear within 1-5 minutes of the injection.
- Feeling uneasy
- Confusion
- Dizziness
- A metallic taste in the mouth
- Difficulty speaking
- Hearing changes
If you or someone you know experiences any of these symptoms after local anesthesia, you should immediately go to the nearest hospital's Emergency Department (ETU) . Although this is a treatable condition, if not treated promptly, it can lead to more serious conditions such as seizures and heart failure.
Things to be careful about after the medicine
You need to be a little careful until the tingling goes away.
- Driving: It is usually safe to drive after a minor procedure, such as a tooth extraction. However, if you have had surgery that affects your arm, leg, or eye, or if you have been given sedation, it is safer to have someone else drive you .
- Eating and drinking: Avoid eating on the side of a tooth that is sore and swollen, as you may inadvertently bite your cheek and injure your gums.
- Pregnancy: Local anesthesia is generally considered safe during pregnancy. However, it is essential to talk to your doctor and get permission before doing anything.
Local Anesthesia is a very useful thing in medicine. Because of this, we have the opportunity to perform minor surgeries and tests without any pain and with a quick recovery. So don't be afraid of this. If you have any questions or concerns, talk to your doctor about them. They are there to help you.
Take-Home Message
- Local anesthesia is a temporary numbing of only a small area of the body. You will not lose consciousness.
- This is used for many minor medical procedures such as tooth extractions, wound suturing, and minor skin surgeries.
- Always inform your doctor about any allergies or previous anesthesia problems you have.
- Side effects are very rare and usually minor. However, if severe symptoms such as difficulty breathing or confusion occur, seek immediate emergency care (ETU).
- Be careful when eating and driving, especially after dental treatment, until the tingling sensation subsides.
💬 අදහස් (0)
තවමත් කිසිදු අදහසක් පළ කර නොමැත. ඔබේ අදහස පළමු වරට මෙහි එක් කරන්න.
ඔබේ අදහස එක් කරන්න