FAQs
What is the ice bag test?
The ice bag test is a diagnostic exam for myasthenia gravis where an ice pack is applied to a weak muscle after activity to see if strength improves with cooling.
Why does ice help MG weakness?
Cold temperatures improve nerve-to-muscle signaling in myasthenia gravis, leading to transiently enhanced muscle contraction.
How long does improvement last?
In myasthenia gravis, the strength boost from icing typically lasts about 5-10 minutes before declining again.
What are limitations of the test?
The ice bag test does not confirm MG, has subjective results, cannot assess ocular weakness, and may be negative in some cases.
Is the test uncomfortable?
Proper technique avoids injury, but 1-2 minutes of icing can feel very cold on the skin. Discomfort is temporary.
Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult with a healthcare professional before starting any new treatment regimen.
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