Two days after surgical fixation of a fractured femur, a client suddenly reports chest pain and difficulty in breathing. The nurse suspects the client had a pulmonary embolus. Which action should the nurse take first?

Choice A: When the client has ankle edema is not the most important time for the nurse to assess DTRs, as this is a common finding in pregnancy and does not indicate a neurological or vascular problem. This is a distractor choice.

Choice B: Within the first trimester of pregnancy is not the most important time for the nurse to assess DTRs, as this is a routine assessment that can be done at any time during pregnancy and does not reflect any specific risk or complication. This is another distractor choice.

Choice C: If the client has an elevated blood pressure is the most important time for the nurse to assess DTRs, as this can indicate preeclampsia, a serious condition that can cause seizures, stroke, and organ damage. DTRs can help detect hyperreflexia, which is a sign of increased intracranial pressure and impending eclampsia. Therefore, this is the correct choice.

Choice D: During admission to labor and delivery is not the most important time for the nurse to assess DTRs, as this is a standard assessment that can be done at any stage of labor and does not signify any urgent or emergent situation. This is another distractor choice.

Choice A reason: Notifying the healthcare provider is an important action, but not the first one. The nurse should prioritize interventions that address the client's immediate needs, such as oxygenation and circulation.

Choice B reason: Preparing a continuous heparin infusion per protocol is an appropriate action for preventing further clot formation and reducing the risk of recurrent pulmonary embolism, but it is not the first action. The nurse should first stabilize the client's condition before administering anticoagulant therapy.

Choice D reason: Bringing the emergency crash cart to the bedside is a prudent action, but not the first one. The nurse should prepare for possible cardiopulmonary resuscitation (CPR) in case of cardiac arrest, but should first attempt to prevent it by providing oxygen and other supportive measures.