title: [Are blood tests prior to ear operations in children necessary?--A retrospective analysis].
abstract: BACKGROUND
  Operations in children are often drastic events for patients and their parents. Most ENT operations are elective. Often blood tests are done even though there is no clinical evidence for coagulation disorders or anaemia in the medical history of the patient and their family. Since the joint statement of the German Societies of Oto-Rhino-Laryngology, Head and Neck surgery, of pediatrics and of anesthesiology regarding the necessity of coagulation tests prior to adenoidectomy or tonsillectomy in children we wanted to know whether blood tests have any effect for ear operations.
  
  
  METHODS
  Data of 81 children were analysed, undergoing an ear operation during 2006/2007 at the department of Oto-Rhino-Laryngology in Bochum, retrospectively. Information on sex, age, hemoglobin concentration, platelet count, INR, thromboplastin time, prothrombin time, count of the white blood cells, Cholinesterase (CHE), Glutamat-Oxalacetat-Transaminase (GOT), Glutamat-Pyruvat-Transaminase (GPT), gamma-Glutamyltransferase (GT), Creatinkinase (CK), creatinine, c-reactive protein (CRP) and clinical history of postoperative complications (bleeding, infections) were collected.
  
  
  RESULTS
  Out of 698 registered parameters 10,5 % were differing from the reference parameters. There were no abnormal bleedings or complications which could have been predicted by blood tests.
  
  
  CONCLUSIONS
  The preoperative blood tests have no influence on the management of an elective ear operation. A thorough medical patient's and family history should be taken and may be added by a calculated analysis of special blood tests.
authors.affiliation: Universitätsklinik für Hals-, Nasen- und Ohrenheilkunde, Kopf- und Halschirurgie, Ruhr-Universität Bochum, St. Elisabeth-Hospital, Bochum, Germany. matthiasschwaab@gmx.de
authors.forename: M
authors.initials: M
authors.lastname: Schwaab
authors.forename: S
authors.initials: S
authors.lastname: Shagdarsuren
authors.forename: S
authors.initials: S
authors.lastname: Hansen
authors.forename: S
authors.initials: S
authors.lastname: Dazert
mesh_terms: D000293:Adolescent; D001772:Blood Cell Count; D001774:Blood Chemical Analysis; D001780:Blood Coagulation Tests; D001800:Blood Specimen Collection; D002648:Child; D002675:Child, Preschool; D004427:Ear Diseases / Q000601:surgery*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D011237:Predictive Value of Tests; D011300:Preoperative Care; D012016:Reference Values; D019564:Unnecessary Procedures