Introduction: Anxiety is often experienced by children undergoing health care procedures, and children with autism spectrum disorders (ADS) experience more anxiety than typically developed children. A prerequisite for obtaining an optimum procedure is firstly based on the health care provider’s knowledge about children with ASD, but may also depend on the use of guidelines. Two previous national surveys showed, that none radiology or paediatric departments and a minority of anaesthesiology departments throughout Sweden use specific guidelines when seeing children with ASD. Following, the purpose was to develop guidelines to use when caring for and preparing children with ASD in those settings.

Methods: A modified Delphi method was used, including19 experts identified from the two afore mentioned surveys. The questions considered in the process, proceeded from previous research and the results from the surveys. The experts’ responses regarding the importance of each item, were analysed and scrutinized between each round.

Results: The Delphi process resulted in guidelines consisting of 15 items and a checklist with 16 aspects. The items cover the areas: planning and involving parents, features in the environment, use of time, communication, thehealth care professionals. The checklist covers the child’spattern of communication, anxiety, sensory stimuli, special interests and likes/dislikes.

Conclusions: To obtain an optimum caring encounter when a child with ASD is seen in the preoperative and radiology setting, a meticulous planning is important and the environment should be adjusted for the needs of the child. To accomplish this, guidelines need to be in place and be followed.