To assess the frequency and safety of procedures performed by advanced practice providers and medical residents in a mixed-bed ICU.Design: A prospective observational study where consecutive invasive procedures were studied over a period of 1 year and 8 months. The interventions were registered anonymously in an online database. Endpoints were success rate at first attempt, number of attempts, complications, level of supervision, and teamwork.Setting: A 33-bedded mixed ICU.Subjects: Advanced practice providers and medical residents.Interventions: Registration of the performance of tracheal intubation, central venous and arterial access, tube thoracostomies, interhospital transportation, and electrical cardioversion.Measurement and main resu...