Wa `alaykum As-Salamu wa Rahmatullahi wa Barakatuh

 

In the Name of Allah, the All-Merciful, the Mercy-Giving

 

If this is an essential part of the training which you cannot skip, then you need not worry about it.

 

It will not invalidate your fast as long as you keep your mind pure and chaste. You may do so by focusing as much as possible during the procedure on dhikr and praying to Allah to guard your heart and soul.

According to the rules of jurisprudence, in case of hardship, the rigors of law are relaxed.

 

Medical training is an essential area which Muslims can only neglect at their peril.

 

Almighty Allah knows best.