Respirators for respiration of patients are provided with interfaces 3 for input of at least one respiration parameter (PINSP, PEEP, RAM, I/E, RAT, TINSP, TEXP, TAZ) that is relevant for the respiration. A respirator includes a computation unit for calculating a respiration curve (4, 4a, 4b) from the at least one respiration parameter (PINSP, PEEP, RAM, I/E, RAT, TINSP, TEXP, TAZ), and includes a display unit 2 for displaying the calculated respiration curve (4, 4a, 4b). In addition, methods for operation of respirators are provided.
