Scope of application: The sana couch 250 L couch/semi-couch safety ergometer has been developed for use in the cardiology sector. Special safety aspects, e.g. in cases of suspcted cardiovascular disorders, stress test after a cardiac infarction or after bypass operations, and special exercise ergometry applications, such a heart catheter examinations, require the use of a couch/semi-couch safety ergometer. Its use is also recommended for the examination of elderly and disabled patients.