Final answer:
To perform CPR on a 15-month-old patient, you should follow the Infant CPR/AED guidelines and use the appropriate techniques and modifications for infants.
Step-by-step explanation:
To initiate CPR on a 15-month-old patient, you should follow the Infant CPR/AED guidelines. When performing CPR on an infant, it is important to use the correct technique and modifications specifically designed for their age group. Some key differences in infant CPR include using two fingers for chest compressions instead of the heel of your hand and covering both the infant's mouth and nose when giving rescue breaths.