সংজ্ঞা
Electromyography (EMG) measures and records the electrical activity of a muscle. The test can record a muscle’s electrical activity at rest or during a muscle contraction.
An EMG is often done with nerve conduction studies. These studies can analyze the electrical activity in your nerves.
পরীক্ষার কারণ
EMG is most often done to:
- Aid in diagnosing the source of pain, cramping, or weakness in the muscles and nerves
- Differentiate between true muscle weakness and limitations due to pain
- Determine if muscles are working properly
- Distinguish between muscle and nerve disorders
সম্ভাব্য জটিলতা
এই পরীক্ষার সাথে যুক্ত কোন বড় জটিলতা নেই।
কি আশা করা যায়
পরীক্ষার আগে
Make sure you talk to your doctor about the medicines you are taking. You may be asked to adjust certain medicines up to a week before the test, such as:
- প্রদাহ বিরোধী ওষুধ, যেমন অ্যাসপিরিন
- Blood thinners, such as clopidogrel (Plavix), warfarin (Coumadin), or ticlopidine (Ticlid)
On the day before and day of the test:
- If you have myasthenia gravis, ask if you should take any medicine before the test.
- If directed to, avoid cigarettes, coffee, tea, and soft drinks for 2-3 hours before the test.
- Take a bath or shower before the test.
- On the day before, do not use lotion or oil.
- Wear comfortable clothing, but expect to change into a hospital gown.
- Tell your doctor if you have a pacemaker or other implanted device.
পরীক্ষার বর্ণনা
A small needle electrode will be inserted into a muscle at rest. You will be asked to rest or contract the muscle. The electrical activity picked up by the needle will produce a waveform. The waveform will be recorded and analyzed. The test is repeated on different muscles and limbs.
পরীক্ষার পর
You will be able to leave once the test is done. Once you are home:
- Resume any medicines you stopped before the test.
- Resume normal activities as tolerated.
কতক্ষণ এটা লাগবে?
30-90 minutes
এটা আঘাত করবে?
You may have some pain when the needle electrodes are inserted. The insertion feels like an injection into the muscle.
After the test, you may have muscle aches and discomfort for several days. Warm compresses and pain medicine may help.
ফলাফল
The doctor doing the EMG may discuss the results with you. A report will also be sent to your regular doctor. Your doctor will discuss চিকিত্সার বিকল্প based on the tests and other factors.
আপনার ডাক্তারকে কল করুন
পরীক্ষার পরে, যদি নিম্নলিখিতগুলির মধ্যে কোনটি ঘটে তবে আপনার ডাক্তারকে কল করুন:
- জ্বর এবং ঠাণ্ডা সহ সংক্রমণের লক্ষণ
- Redness, swelling, increasing pain, excessive bleeding, or discharge around the needle sites