Final answer:
The next step in management for suspected PE is to order a diagnostic test. Oxygen should be given to patients with SOB and suspected PE.
Step-by-step explanation:
The next step in management for a patient with suspected pulmonary embolism (PE) according to the Wells criteria is to order a diagnostic test to confirm the diagnosis. The Wells criteria takes into account various clinical parameters to assess the risk of PE in a patient. These parameters include a history of cancer, recent surgery, and prolonged immobilization (lots of sitting).
As for the administration of oxygen (O2), it should be given to a patient with shortness of breath (SOB) and suspected PE as part of the initial management. Oxygen helps to stabilize the patient's condition and improve oxygenation. However, the precise method and amount of oxygen administration should be determined by a healthcare professional based on the patient's individual needs and oxygen saturation levels.