What is the first action a nurse should take when a client returns from surgery and shows signs of tachycardia and tachypnea?

In a situation where a client returns from surgery exhibiting signs of tachycardia (increased heart rate) and tachypnea (rapid breathing), the first action taken by the nurse should be to prioritize the client's immediate physiological needs. Placing the client in a modified Trendelenburg position can help enhance venous return to the heart, thereby potentially improving cardiac output and stabilizing vital signs. This position involves elevating the legs, which can assist in increasing blood flow to vital organs, and may be particularly beneficial if the tachycardia and tachypnea are indicative of a post-operative complication such as hypovolemia or shock.

It's important for nurses to act swiftly, and positioning the client helps to manage the symptoms immediately while concurrent assessments are conducted. While monitoring vital signs is crucial, and calling for a physician is necessary for further evaluation and intervention, these actions can follow the initial supportive measures taken to stabilize the client. Administering oxygen therapy can also be critical if the patient is showing signs of hypoxia, but establishing the patient's position for optimal circulation typically takes precedence in urgent situations.