title: [Preoperative coagulation screening prior to adenoidectomy and tonsillectomy].
abstract: BACKGROUND
  Laboratory tests are widely used to screen children with planned surgery to detect unknown coagulation defects. This study investigates the predictive value of commonly used coagulation tests (thromboplastin time, partial thromboplastin time and thrombocyte count) compared with a standardized bleeding history.
  
  
  METHODS
  In 702 patients 500 adenoidectomies and 500 tonsillectomies were done, results of laboratory evaluation and individual bleeding history were evaluated.
  
  
  RESULTS
  9.4 % of all laboratory tests showed abnormal results. 30.5 % of the children awaiting adenoidectomy had a suspicious bleeding history as had 22 % of patients undergoing tonsillectomy. In the clinical course of adenoidectomy no bleeding occurred. After tonsillectomy 15 children (3 %) showed moderate, 12 patients (2.4 %) severe postoperative bleeding. The positive predictive value of coagulation screening reached 6.8 % whereas history alone predicted 9.2 % of observed post tonsillectomy bleeding.
  
  
  CONCLUSIONS
  The results of this study demonstrate the lacking effect of laboratory tests to predict postoperative bleeding complications. Taking a careful history of bleeding risks and testing only patients with suspicious history reduces the risk of bleeding more effective. Counseling about bleeding symptoms and postoperative survey of patients are additional measures which may protect the children.
authors.affiliation: Klinik für Kinder- und Jugendmedizin, Klinikum Braunschweig gGmbH. w.eberl@klinikum-braunschweig.de
authors.forename: W
authors.initials: W
authors.lastname: Eberl
authors.forename: I
authors.initials: I
authors.lastname: Wendt
authors.forename: H-G
authors.initials: HG
authors.lastname: Schroeder
mesh_terms: D000233:Adenoidectomy; D000293:Adolescent; D001780:Blood Coagulation Tests; D002648:Child; D002675:Child, Preschool; D005260:Female; D006474:Hemorrhagic Disorders; D006801:Humans; D007223:Infant; D008297:Male; D008487:Medical History Taking; D010314:Partial Thromboplastin Time; D019106:Postoperative Hemorrhage / Q000097:blood / Q000517:prevention & control*; D011237:Predictive Value of Tests; D011300:Preoperative Care; D011517:Prothrombin Time; D012307:Risk Factors; D012680:Sensitivity and Specificity; D014068:Tonsillectomy