The nurse is caring for the client with cardiac and renal disease. The client now has a serum potassium level of 6.0 mEq/L. Which medications, if prescribed, should the nurse administer? Select all that apply.

A. Increased blood pressure:
In hypovolemia, the body experiences a significant loss of blood volume, which leads to a reduction in the amount of blood available to circulate through the vessels. This causes a drop in blood pressure, known as hypotension, rather than an increase. The body tries to compensate for the lower blood volume by constricting blood vessels and increasing heart rate, but this typically isn't sufficient to increase blood pressure to normal levels.

B. Decreased heart rate:
The body's natural response to hypovolemia includes an increase in heart rate, known as tachycardia, as the heart attempts to pump the remaining blood more efficiently to vital organs. This compensatory mechanism aims to maintain cardiac output despite the decreased blood volume.

C. Dyspnea:
Dyspnea, or difficulty breathing, can occur in many medical conditions, including heart failure and respiratory issues. While it can be seen in severe cases of hypovolemia, particularly if the condition leads to shock and subsequent multi-organ failure, it is not a primary or specific sign of hypovolemia.

D. Weak pulse:
A weak pulse is a primary and direct manifestation of hypovolemia. Due to the reduced volume of circulating blood, the heart has less blood to pump with each contraction, leading to a weaker pulse. This symptom indicates a decreased perfusion pressure, which is characteristic of hypovolemia. The body's compensatory mechanisms include vasoconstriction and an increased heart rate, but these measures often result in a pulse that is rapid but weak.

A. Light-headedness when standing up:
Elevated potassium levels (hyperkalemia) can lead to muscle weakness or paralysis, cardiac dysrhythmias, and even cardiac arrest. Light-headedness when standing up is more commonly associated with orthostatic hypotension or volume depletion rather than electrolyte imbalances like hyperkalemia.

B. Weak quadriceps muscles:
Weakness in the quadriceps muscles is not typically associated with the electrolyte imbalances presented in the scenario. Hyperkalemia can cause muscle weakness, but it is not specific to the quadriceps.

C. Decreased deep tendon reflexes:
Decreased deep tendon reflexes are not typically associated with the electrolyte imbalances presented in the scenario. Hyperkalemia can lead to hyperreflexia or absent reflexes, but it is not specific to decreased deep tendon reflexes.

D. Tingling of extremities:
This is the correct answer. Hypocalcemia, indicated by the low calcium level in the scenario, can manifest with symptoms such as tingling or numbness of the extremities, muscle cramps, and tetany. Calcium plays a crucial role in nerve transmission, and low levels can lead to sensory disturbances like tingling in the extremities.