Final answer:
The statement is true; blow by O₂ can be provided from the mask of a self-inflating bag to deliver supplemental oxygen in a non-invasive manner.
Step-by-step explanation:
The statement that blow by O₂ can be given from the mask of a self-inflating bag is True. Self-inflating bags are designed to provide positive pressure ventilation to individuals who are not breathing adequately on their own. These devices are capable of delivering a mixture of air and supplemental oxygen when attached to an oxygen source.
The 'blow by' method refers to the technique of delivering oxygen near the patient's face using the flow from the mask's reservoir, which is a form of non-invasive ventilation. This can be useful in cases where patients are intolerant of mask ventilation or need supplemental oxygen without the tight seal of a mask.