In a similar pilot study, Kämäräinen et al. cooled seventeen adult patients with out-of-hospital cardiac arrest during CPR. A return of circulation was achieved in 13 patients (76%). The temperature of the patients on hospital admission was a mean of 33.8°C and the mean infused volume of cold fluid was 1571mL. The authors concluded that induction of therapeutic hypothermia during prehospital CPR was feasible and apparently well tolerated.