The study will aim to directly compare the efficiency and efficacy (ventilation rate and tidal volumes) of manual ventilation against a new device, VR-1 portable ventilator, by Smith-Medical. The device is CE approved. The RCT will compare the efficacy and efficiency during transfer of the patient from theaters to intensive care in our establishment. The endpoint will be arrival to the intensive care unit (ICU) and transfer onto the ICU ventilator. This will be measured by collecting the pCO2, taken from an already in-situ arterial blood gas (ABG), at two time points - (a) just before patient transfer from theaters to the intensive care unit and (b) upon arrival at the intensive care unit and just prior to transfer onto the ITU ventilator.