Is it obligatory to perform full ritual ablution (ghusl al-akbar) or only partial ritual ablution (wudu') when a Muslim nurse bathes male patients?

The default rule is that it is not permissible for a woman to be in seclusion with a man or to wash a deceased man. However, if there is an urgent necessity for a woman to wash a sick man because no one else is available, there is no harm, provided the following conditions are observed: the washing should not take place in seclusion, she should place a barrier between herself and him, and she should avoid looking at his 'awrah (private parts).

From a jurisprudential perspective, she is not required to perform ghusl (ritual bath) merely for washing the man, and she is not required to perform wudu' (ablution) if there was a barrier. However, if she directly touched him with her hand during the washing, her wudu' is invalidated according to some scholars. The more preponderant opinion is that her wudu' is not invalidated unless she intended to touch with lust or experienced lust.