Answer to Question 1
4
Rationale: Diabetes insipidus results from insufficient ADH production, which in this case was because of head injury. This causes the kidneys to excrete large volumes of urine. Water intoxication represents the opposite problem of that experienced with diabetes insipidus. Excess production of dopamine and excess production of angiotensin II are not associated with diabetes insipidus.
Answer to Question 2
4
Rationale: The nurse assesses the client's serum laboratory study results for hypokalemia. The client may experience PVCs in the presence of hypokalemia, because this electrolyte imbalance increases the electrical instability of the heart. The electrolyte imbalances mentioned in the other options do not have this effect.