title: Preoperative risk assessment--from routine tests to individualized investigation.
abstract: BACKGROUND
  Risk assessment in adults who are about to undergo elective surgery (other than cardiac and thoracic procedures) involves history-taking, physical examination, and ancillary studies performed for individual indications. Further testing beyond the history and physical examination is often of low predictive value for perioperative complications.
  
  
  METHODS
  This review is based on pertinent articles that were retrieved by a selective search in the Medline and Cochrane Library databases and on the consensus-derived recommendations of the German specialty societies.
  
  
  RESULTS
  The history and physical examination remain the central components of preoperative risk assessment. Advanced age is not, in itself, a reason for ancillary testing. Laboratory testing should be performed only if relevant organ disease is known or suspected, or to assess the potential side effects of pharmacotherapy. Electrocardiography as a screening test seems to add little relevant information, even in patients with stable heart disease. A chest X-ray should be obtained only if a disease is suspected whose detection would have clinical consequences in the perioperative period.
  
  
  CONCLUSIONS
  In preoperative risk assessment, the history and physical examination are the strongest predictors of perioperative complications. Ancillary tests are indicated on an individual basis if the history and physical examination reveal that significant disease may be present.
authors.affiliation: University Hospital Witten/Herdecke-Cologne, Department of Anesthesiology and Intensive Care Medicine at the Hospital Cologne-Merheim, Department of Anesthesiology, Ludwig-Maximilian-Universität, Munich.
authors.forename: Andreas B
authors.initials: AB
authors.lastname: Böhmer
authors.forename: Frank
authors.initials: F
authors.lastname: Wappler
authors.forename: Bernd
authors.initials: B
authors.lastname: Zwissler
mesh_terms: D002318:Cardiovascular Diseases / Q000150:complications* / Q000175:diagnosis*; D019317:Evidence-Based Medicine; D005858:Germany; D006801:Humans; D038622:Internationality; D008487:Medical History Taking / Q000379:methods*; D010808:Physical Examination / Q000379:methods*; D011183:Postoperative Complications / Q000209:etiology* / Q000517:prevention & control*; D011300:Preoperative Care / Q000379:methods*; D011379:Prognosis; D018570:Risk Assessment / Q000379:methods