The nurse is assessing an adult client following a motor vehicle accident. The nurse observes that the client has an increased use of accessory muscles and is reporting chest pain and shortness of breath. The nurse should recognize the possibility of what condition?

A. The client denies nausea or anorexia: While improved appetite is beneficial, it does not directly indicate that lactulose is effective. Lactulose is primarily used to reduce ammonia levels and prevent hepatic encephalopathy. Symptom relief alone does not confirm therapeutic effect.

B. The client's bilirubin level decreases: Lactulose does not directly affect bilirubin levels. Bilirubin reflects liver excretory function, not the medication’s action on ammonia. Changes in bilirubin are not a reliable measure of lactulose effectiveness.

C. The client is alert and oriented: Lactulose reduces blood ammonia by promoting its excretion via the gastrointestinal tract. Improved mental status, such as being alert and oriented, indicates effective reduction of ammonia and prevention of hepatic encephalopathy.

D. The client has at least one stool daily: While increased bowel movements are expected with lactulose, the frequency alone does not confirm that ammonia levels are adequately reduced. Stool output is a mechanism, not the ultimate therapeutic outcome.

A. Administration of norepinephrine IV push: Norepinephrine is a vasopressor used to treat hypotension in shock, but it does not address the underlying cause of an antigen-antibody reaction. It may be used if hypotension persists after epinephrine, but it is not the first-line treatment. Immediate reversal of the allergic response is more critical.

B. Administration of phosphodiesterase inhibitors: Phosphodiesterase inhibitors improve cardiac contractility and reduce afterload but are not indicated for anaphylactic shock. They do not counteract the systemic effects of a severe antigen-antibody reaction.

C. Administration of epinephrine: Epinephrine is the first-line treatment for anaphylactic shock caused by antigen-antibody reactions. It rapidly reverses vasodilation, bronchodilates, and stabilizes mast cells. Prompt IV or intramuscular administration is essential to prevent cardiovascular collapse and respiratory compromise.

D. Administration of antibiotics: Antibiotics are not indicated unless an infection is the trigger for shock. In antigen-antibody–mediated (anaphylactic) shock, the priority is reversing the allergic reaction. Antibiotics do not address vasodilation, bronchospasm, or histamine-mediated effects.