Currently, the US healthcare system has a blend of both permanent and temporary nurses.
Permanent nursing refers to a model of nursing employment where hospitals or clinics employ nurses as full-time employees.
In contrast, temporary nursing is a model of nursing employment where nurses pick up shifts on an ad-hoc basis, or sign short term contracts (usually no longer than a few months) via agencies to work at certain facilities.
In recent years, the proportion of temporary nurses in US hospitals has increased.