Answer

In the Name of Allah, Most Gracious, Most Merciful. 

All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.

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In this fatwa:

Hemodialysis, which involves the extraction of blood, its purification, and then its return, does not nullify Wudu.

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Answering your question, The Assembly of Muslim Jurists of America, states:

Hemodialysis, which involves the extraction of blood, its purification, and then its return, does not nullify the ablution (wudu). Peritoneal dialysis is a matter the requires further consideration, although the prevailing opinion is that it also does not nullify the ablution.

Read also:

What Nullifies Wudu?

What Does Not Invalidate Wudu

Can Kidney Patients Break the Fast?

Does Dialysis Break the Fast?

Almighty Allah knows best.

Source: AMJA Online