title: [Metal detectors for security checks mostly insensitive for metal implants].
abstract: OBJECTIVE
  To determine whether metal implants may cause problems at security checks (e.g. at airports).
  
  
  METHODS
  Amsterdam, Schiphol.
  
  
  METHODS
  Fifty operated scoliosis patients chosen at random were asked by questionnaire whether they had ever been checked with a metal detector at an airport and whether the detector had reacted to the implant. In addition, several types of implants were tested with two types of detectors in collaboration with the airport State Police.
  
  
  RESULTS
  Forty-six questionnaires were returned. Twenty-two respondents stated having been checked with a metal detector gate at least once. In three cases the detector had sounded. During the Schiphol trial it was found that the metal detector gate did not react to various types of osteosynthesis material nor to a Harrington rod.
  
  
  CONCLUSIONS
  Metal detectors may be expected as a rule not to react to medical implants. This is due among other things to the relative insensitivity of metal detectors to the alloy used in the implant and to their being adjusted to react only to metal in quantities above a certain minimum.
authors.affiliation: Onze Lieve Vrouwe Gasthuis, afd. Orthopedie, Amsterdam.
authors.forename: L W
authors.initials: LW
authors.lastname: van Rhijn
authors.forename: B E
authors.initials: BE
authors.lastname: Veraart
mesh_terms: D006801:Humans; D008670:Metals; D019736:Prostheses and Implants; D012637:Security Measures
chemical_list: D008670:Metals
vernacular_title: Metaaldetectoren bij veiligheidscontroles doorgaans ongevoelig voor metalen implantaten.