This prospective study intends to development and validation a patient self-assessment questionnaire. The aim of the self-assessment, by questionnaire, is to estimate the risk of postoperative pulmonary complications (PPC).

PPC are common adverse events operative patients. Existing concepts of pulmonary risk evaluation are based on complex risk scores, preoperative apparatus examinations, laboratory parameters and medical findings. The significance of apparatus diagnostics for the preoperative Pulmonary risk evaluation is highly controversial and guidelines recommend a reluctant use. A large prospective study (PREDICT, unpublished to date, NCT02566343) showed that lung function assessment in patients with COPD symptoms undergoing major non-cardiac surgery did not improve the anamnestic risk assessment. In a large study it could be shown that a subjective self-assessment of physical performance by means of a structured questionnaire (DASI), in contrast to a subjective medical assessment, suitable for predicting perioperative cardiac events. Our unpublished data show that a subjective self-assessment of "limited exercise capacity" in patients with COPD is predictive of PPC is suitable.

Objectives:

• Development of a self-assessment questionnaire as part of a Delphi trial
• Validation of the self-assessment questionnaire

Methodology:

Prospective observational, case control study of 5000 patients undergoing surgery in general anesthesia (estimated enrollment of 5500 patients with a dropout rate of approximately 10%).

Inclusion Criteria:

• 18 years and older
• Operations in general anesthesia

Exclusion Criteria:

• < 18 Years
• Pregnancy
• Lack of cooperation

Patients scheduled for operations in general anesthesia, who present in the pre-assessment clinic of the University Medical Center Hamburg-Eppendorf during the study recruitment period, will be screened for eligibility.