Instructions for use: Enter the body weight (range 0-50kg) and the age (0-10 years, with option to enter age in months or days). The information provided is self-explanatory. If you enter the age in days, the app will assume the baby is a neonate or a very small infant and will take this into account in certain calculations, e.g. ETT size. Additiontal functions: A body weight estimation tool is available to estimate the patient's body weight based on body length/height or age, according to loca