Inclusion Criteria:  WARD-COPD:  ≥ 18 years Patients admitted to emergency departments or pulmonary wards with AECOPD as admission diagnosis with suspected acute exacerbation of COPD The diagnosis had to be sustained in the patient record at the time of inclusion Expected admittance longer than 24 hours Possibility of an investigator to include the patient within 24 hours from admission  WARD-Surgery:  ≥ 60 years Elective major abdominal cancer surgery Estimated surgical duration ≥ 2 hours.  Exclusion Criteria:  WARD-COPD:  Patients who were not expected to cooperate to wear the monitoring equipment Unable to give informed consent Patients who were withheld active treatment Implanted cardioverter defibrillator or pacemaker Severe allergy for plaster/silicone  WARD-Surgery:  Implanted cardioverter defibrillator or pacemaker Allergy to study devices Severe cognitive impairment assessed by MMSE Inability to cooperate wearing the wireless monitoring equipment