AAs and PAs in Anesthesia are presently the two alternative, non-medical, non-nursing anesthesia specialties. AAs and PAs work in many states (Colorado has some, New Mexico, too).
AAs and PAs *must*, by law, work under the immediate and direct supervision of an anesthesiologist (they may not work independently in any jurisdiction.) CRNAs can work independently providing that hospital bylaws provide for such.
Depending upon locale and custom, AAs, PAs and CRNAs earn comparable incomes, however CRNAs in general have the ability to earn far, far more than AAs and PAs due to the lack of restrictions on their practice models.
In scenarios where AAs and PAs work, they do essentially the same work as a CRNA.
I don't know the job availability stats for AAs and PAs.
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