Lung Diseases, Obstructive, Postoperative Complications
Conditions
Keywords
Spirometry, Exercise Test, Blood Gas Analysis, Respiratory Function Tests, Diagnostic Techniques, Respiratory System, Surgical Procedures, Operative
Brief summary
This prospective study intends to investigate the incidence of postoperative pulmonary complications (PPC) or in-hospital mortality in patients with COPD or at risk for COPD undergoing high-risk noncardiac major surgery and to identify relevant risk factors. This study aims to quantify and compare the diagnostic performance of preoperative functional tests, exercise capacity, clinical assessment tests and predictive scoring systems to predict PPC or in-hospital mortality in these patients.
Detailed description
COPD is associated with high perioperative morbidity and mortality and PPC frequently occur in these patients. However, concepts for preoperative pulmonary risk assessment and the predictive value of routine preoperative exercise capacity, clinical assessment and pulmonary function tests are still poorly characterized. Objectives: * To determine the incidence of the composite end point of PPC or all cause in-hospital mortality in patients with confirmed COPD (spirometry) and patients with clinical risk factors in whom spirometry disproved COPD. * To determine the predictive value of exercise capacity, clinical assessment tests, pulmonary function tests and predictive scoring systems to predict the composite end point in these patients. * To identify relevant risk factors and predictors associated with the composite end point. Methodology: Prospective single-centre observational study All patients receive a structured preoperative pulmonary risk assessment with: 1. standardized clinical questionnaire 2. COPD Assessment Test (CAT™) 3. exercise capacity (symptom-limited stair climbing) 4. spirometry 5. capillary blood gas Analysis Postoperative follow-up is planned between the 2nd and 5th day after extubation.
Interventions
None listed
Sponsors
Universitätsklinikum Hamburg-Eppendorf
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* 18 years and older * High-risk noncardiac major surgery with an anticipated operation time ≥ 120 minutes and/or planned postoperative intensive care unit admission * Typical clinical signs for COPD (dyspnea, chronic cough, chronic sputum production, exposure to risk factors) * Confirmed COPD (medical history) or clinical risk factors for COPD * Positive COPD Assessment Test (CAT™)
Exclusion criteria
* \< 18 Years * Pregnancy * Lack of cooperation * Inability to provide functional tests like spirometry or stairclimbing
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Composite end point of postoperative pulmonary complications (PPC) or all cause in-hospital mortality | until hospital discharge up to 6 months after surgery |
Secondary
| Measure | Time frame |
|---|---|
| Carbon dioxide (pCO2) and oxygen (pO2) partial pressures from blood gas analysis | within 1 week after extubation |
| Postoperative new respiratory symptoms (e.g. dyspnea or wheezing) or treatment for exacerbation (e.g. new systemic glucocorticosteroids or bronchodilators) | until hospital discharge up to 6 months after surgery |
| New pulmonary radiological findings (e.g. pneumonia or pneumothorax) | until hospital discharge up to 6 months after surgery |
| Forced expiratory volume in one second to forced vital capacity ratio (FEV1/FVC) and FEV1 % predicted | within 1 week after extubation |
| Duration of postoperative respirator support (h) | until hospital discharge up to 6 months after surgery |
| Length of stay in the intensive care unit (days) | until hospital discharge up to 6 months after surgery |
| Frequency of unplanned intensive care unit admission, prolonged oxygen requirement, reintubation, non-invasive ventilation (NIV) or extracorporeal lung assist | until hospital discharge up to 6 months after surgery |
| Duration of hospitalization (days) | until hospital discharge up to 6 months after surgery |
Countries
Germany
Outcome results
None listed