Residents work in many different types of hospital wards during their training and can switch wards every 2 to 4 weeks. They also work in shifts and have limits on the number of hours they can stay in the hospital. Therefore, each hospital ward has a constant flow of many different residents. At the end of the day, residents working the daytime shift will usually hand over the care of their patients to residents working the nighttime shift. The opposite happens at the end of the night. For example, if you are admitted to the hospital during the night, the nighttime resident takes care of you until the daytime resident arrives in the morning, then the daytime resident will take over your care. This process is known in the medical world as a patient handoff.