As I understand it, angels are non-physical beings that can manifest themselves in a billion places at once, and as such, they are quite capable of assisting in nearly every physical action you can think of, at any time.
This question arises after I read a book called Angels 101, by Doreen Virtue, phd. She contends that angels are more than willing to help, and in fact are more enthusiastic towards helping you, than you are towards recieving their help. She also says that archangels are just as willing as standard (if there is such a thing) angels.
If you're willing, I'd like you to attempt to invoke the archangel Michael to assist in your next healing. Supposedly all you have to do in order to test this theory, is say or strongly think "Michael, (he knows who you are talking to) Heal this person, or remove this demon" and he or an effective agent will come and do it. Alternatively, he may direct you through intuition or a more physical "voice" to guide you as to the correct actions.
If you have any success, please let me know.
-Evan, from washington state