A support structure for fixating a patient to a treatment unit, and especially a support structure for fixating the patient to a cardiopulmonary resuscitation unit. An embodiment of the support structure comprises a back plate for positioning behind the patients back posterior to the patients heart and a front part for positioning around the patients chest anterior to the patients heart. Further, the front part can comprise two legs, each leg having a first end pivotably connected to at least one hinge and a second end removably attachable to the back plate. The front part can further be devised for comprising a compression/decompression unit arranged to automatically compress or decompress the patients chest when the front part is attached to the back plate.
