[Impact of the COVID-19 lockdown on emergency medical service operations].

Background As a response to the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic, extensive contact restrictions were imposed by law in Germany as in other European countries. The present study intends to clarify the effect of these restrictions on emergency medical service (EMS) operations. Materials and methods Retrospective chart review of EMS operation protocols over the first 6 months of 2020 (n = 6668 rescue missions) in four rescue stations in eastern Lower Saxony (Germany). Description and statistical comparison of operations 6 weeks before the restrictions with an equally long period after the order of the restrictions ("lockdown"). Results During the 6 weeks after the lockdown the frequency of rescue operations decreased by 17.7%. In particular, there was a 40.6% (n = 91) decrease of emergency cases with respiratory diseases, mainly due to a decline of pneumonia and exacerbated chronic-obstructive pulmonary disease (COPD). At the same time, patients' mean age increased with fewer patients under 65 years. There were no changes in the frequency of psychiatric disorders, deceased or injured patients, or refusal of treatment and transport. A total of 67 patients with suspected or confirmed SARS-CoV‑2 infection (1.0%) were observed during this period. Discussion EMS experienced a reduction of operations as a result of contact restrictions, although not as pronounced as was recently described for emergency rooms. This supports the hypothesis that the reduction is particularly evident in less severe cases and in younger patients. The reduction in pneumonia and COPD cases is striking. On the one hand, this could indicate that contact restrictions reduce the incidence of other respiratory infections and their impact on chronic respiratory disorders, but it could also mean that patients try to avoid hospital treatment.