Final answer:
The nurse should first use a Doppler device to assess the pedal pulse in a client with arterial occlusive disease, as it provides immediate information on blood flow when a pulse cannot be palpated.
Step-by-step explanation:
The nurse is unable to assess a pedal pulse in the client diagnosed with arterial occlusive disease. The first intervention that the nurse should implement is using a Doppler device to detect the peripheral pulse when it is not palpable. This will provide immediate, non-invasive information about the presence and quality of blood flow. While a neuromuscular assessment is also important in evaluating overall limb function, it is not the first step when a pulse cannot be detected. Instructing the client to hang the feet off the side of the bed or wrapping the legs in a blanket may help with comfort or circulation but does not address the immediate need to assess blood flow.