A client receiving heparin therapy for deep venous thrombosis (DVT)complains of severe chest pain and shortness of breath.Suspecting a pulmonary embolism,which is the priority action by the nurse?

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A) Applying oxygen and elevating the head of the bed will promote ventilation and gas exchange in those alveoli that are well perfused, helping to maintain tissue oxygenation. Increasing the rate of heparin infusion cannot be done by the nurse without an order from a healthcare provider. Reassuring the client and notifying family members are not priorities, although these measures can decrease the client's anxiety; the priority is to begin oxygen therapy and elevate the head of the bed to increase oxygenation to the tissues. Assessing pulse, respiration, and blood pressure will be performed following the initiation of oxygen therapy and bed elevation.
B) Applying oxygen and elevating the head of the bed will promote ventilation and gas exchange in those alveoli that are well perfused, helping to maintain tissue oxygenation. Increasing the rate of heparin infusion cannot be done by the nurse without an order from a healthcare provider. Reassuring the client and notifying family members are not priorities, although these measures can decrease the client's anxiety; the priority is to begin oxygen therapy and elevate the head of the bed to increase oxygenation to the tissues. Assessing pulse, respiration, and blood pressure will be performed following the initiation of oxygen therapy and bed elevation.
C) Applying oxygen and elevating the head of the bed will promote ventilation and gas exchange in those alveoli that are well perfused, helping to maintain tissue oxygenation. Increasing the rate of heparin infusion cannot be done by the nurse without an order from a healthcare provider. Reassuring the client and notifying family members are not priorities, although these measures can decrease the client's anxiety; the priority is to begin oxygen therapy and elevate the head of the bed to increase oxygenation to the tissues. Assessing pulse, respiration, and blood pressure will be performed following the initiation of oxygen therapy and bed elevation.
D) Applying oxygen and elevating the head of the bed will promote ventilation and gas exchange in those alveoli that are well perfused, helping to maintain tissue oxygenation. Increasing the rate of heparin infusion cannot be done by the nurse without an order from a healthcare provider. Reassuring the client and notifying family members are not priorities, although these measures can decrease the client's anxiety; the priority is to begin oxygen therapy and elevate the head of the bed to increase oxygenation to the tissues. Assessing pulse, respiration, and blood pressure will be performed following the initiation of oxygen therapy and bed elevation.

A Client Receiving Heparin Therapy for Deep Venous Thrombosis (DVT)complains