How should you assess for a pulse in an unresponsive infant?

In assessing for a pulse in an unresponsive infant, palpating the brachial artery is the appropriate method. The brachial artery, located in the upper arm, is the most accessible site for checking the pulse in infants due to their smaller size and the positioning of their anatomy. This method allows for a reliable assessment of circulatory status in a critical situation.

Other methods, such as checking the carotid artery, are not suitable for infants because the anatomical structure makes it difficult to palpate effectively. Using an automated blood pressure cuff is not a practical approach for pulse assessment in an emergency setting, especially in infants, as these devices are designed for measuring blood pressure rather than pulse detection. Looking for chest movements may provide some vague indication of breathing but does not effectively assess the presence of a pulse, which is essential for determining circulation and potential need for resuscitation.