Yes, it is valid.

I intended to fast but couldn’t wake up early to eat something till the rose. When I woke up I realized that the time to start fasting has passed. So I kept on fasting without eating anything. Is my fast permitted?

Fasting | June 1, 2017 8:39 pm
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dear sheik i need advice i have a scanthis sunday that has been requested by my gp urgently but idont know if it will break my fast its basically putting a camera through my throat to my stomach but they may give me pain killers through the vein and also tell me to gaggle Anthestic in the throat does this break my fast if yes then i will move it if no is it ok for me to have pain killers by IV.
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can we put hair oil while fasting.n can patient use eardrops while fasting.