Curious but real question

Okay just curious here. A real and propet answer would be nice if anyone reading this knows. Seriously now. If a Muslim nurse has to put a catheter into a male organ, is she allowed? They are nurses after all and have to treat male patients. How about male doctors are they allowed to do similar procedures to female patients. This may sound like a stupid question but where does the religious aspect stand on this? Now I doubt any Canadian who has lived here would have problem but what about the new Canadian? Having been in the hospital recently I of course saw Muslim nurses around but I did not happen to see any treating male patients. So any sincere answers here would be appreciated. Skip the slurs or idiotic comments, just real answers or questions. Thanks