Abstract: In embodiments, a CPR chest compression system includes a retention structure that can retain the patient's body, and a compression mechanism that can perform automatically CPR compressions and releases to the patient's chest. The compression mechanism can pause the performing of the CPR compressions for a short time, so that an attendant can check the patient. The CPR system can include a user interface that can output a human-perceptible check patient prompt, to alert an attendant to check the patient during the pause. The compression mechanism can during a CPR session retreat a distance away from the patient's chest whereby the patient's chest can expand without active decompression of the patient's chest beyond the chest's natural resting position.

Abstract: Surface material for an absorbent article, wherein the material includes a surface layer which excretes lactic acid and/or an acid physiologically acceptable derivative thereof when the surface layer is immersed in a water volume, the weight ratio between surface layer and water volume being 1:100, in an amount such that the lactic acid and/or derivative excreted within a time period of at most 20 hours will impart a pH of at most 3.0 to the water volume.