Female nurses working with male patients

All hospitals have to ensure that male nurses treat men
and female nurses treat women. This is obligatory, just as it is obligatory
for male doctors to treat men and female doctors to treat women, except
in cases of extreme necessity. If the treatment for an illness is only
known by a man it is OK for him to treat a woman, because this is a
case of necessity. Similarly, if the treatment for a man’s illness is
only known by a woman, it is OK for her to treat him. Otherwise, male
doctors must treat men and female doctors must treat women. This is
obligatory. The same applies to nurses, both female and male. Male nurses
should treat men and female nurses should treat women, so as to avoid
the means that may lead to fitnah (temptation) and to prevent khulwah
(being alone with a non-mahram member of the opposite sex).