A nurse on a medical-surgical unit is caring for a client who has a history of congestive heart failure (CHF). Complete the diagram by dragging from the choices below to specify which condition the client is most likely experiencing, 2 actions the nurse should take to address that condition, and 2 parameters the nurse should monitor to assess the client's progress.

Rationale for correct choices: • Hypovolemic shock: The client exhibits signs consistent with hypovolemic shock, including a rapid decrease in urine output (from 450 mL to 30 mL), dizziness on standing, and hypotension following high-dose IV diuretics. The reduction in blood volume from aggressive diuresis has likely decreased circulating volume, causing perfusion deficits. The heart rate increase is compensatory to maintain cardiac output in the setting of volume depletion. • Administer IV fluids: Fluid replacement is essential to restore circulating volume and improve tissue perfusion in hypovolemic shock. Administering isotonic fluids counteracts the diuretic-induced volume depletion and helps normalize blood pressure and urine output. Close titration ensures perfusion is restored without causing fluid overload, particularly in a patient with a history of CHF. Early fluid resuscitation improves oxygen delivery to vital organs. • Elevate the client’s feet: Leg elevation helps increase venous return to the heart, supporting cardiac output and blood pressure in the setting of hypovolemia. This non-pharmacological intervention provides temporary stabilization while IV fluids are infused. Elevating the legs can also help relieve dizziness associated with orthostatic hypotension. • Pulse pressure: Pulse pressure (the difference between systolic and diastolic BP) narrows in hypovolemic shock due to reduced stroke volume. Monitoring this parameter helps assess the severity of shock and the effectiveness of interventions. A widening pulse pressure after fluid resuscitation indicates improved cardiac output and volume status. It provides a simple, continuous bedside measure of perfusion. • Mental status: Changes in mental status, such as confusion, restlessness, or lethargy, are early indicators of decreased cerebral perfusion in hypovolemic shock. Frequent assessment allows prompt recognition of worsening shock or response to interventions. Improvement in alertness correlates with restoration of adequate tissue perfusion. Rationale for incorrect choices • Cardiogenic shock: Cardiogenic shock is caused by primary cardiac dysfunction, such as myocardial infarction or severe heart failure, leading to poor cardiac output despite adequate volume. This client’s lungs are clear, and the hypotension follows aggressive diuresis rather than a sudden cardiac event. The primary issue is volume depletion, not pump failure, making cardiogenic shock less likely. • Septic shock: Septic shock is associated with infection, fever, tachycardia, hypotension, and warm flushed skin. The client is afebrile, with clear lung sounds, and no evidence of infection. Laboratory or culture results supporting sepsis are not present. Hypotension and oliguria are related to fluid depletion rather than systemic infection. Hence, septic shock is unlikely. • Obstructive shock: Obstructive shock results from conditions such as cardiac tamponade, pulmonary embolism, or tension pneumothorax. The client shows no evidence of these pathologies; lung sounds are clear, peripheral pulses are present, and there is no chest pain or respiratory distress beyond baseline CHF symptoms. Obstructive shock does not fit the assessment. • Administer IV antibiotics: Antibiotics are indicated for infectious causes of shock, such as septic shock. In this client, there is no evidence of infection (afebrile, clear lungs, normal white blood cell count). Administering antibiotics would not address the underlying hypovolemia. Priority interventions must focus on restoring circulating volume. • Obtain a lactate level: While lactate can help assess tissue perfusion and severity of shock, it is not an immediate intervention to treat hypovolemic shock. Early management requires fluid resuscitation and hemodynamic support rather than diagnostic measurement. Lactate monitoring may be a secondary assessment but doesn’t correct the underlying problem. • Administer 1 unit of packed RBCs: Packed RBC transfusion is indicated for significant blood loss or anemia, not for volume depletion caused by diuretics. The client’s hemoglobin is not critically low, and the primary issue is fluid, not oxygen-carrying capacity. Administering fluids is more appropriate for restoring circulating volume. Transfusion is not the first-line treatment. • Temperature: The client is afebrile, making temperature monitoring less relevant for assessing hypovolemic shock. While routine vital signs are important, changes in temperature do not provide direct information about tissue perfusion. Pulse pressure and mental status offer more specific indicators of response to treatment. • Blood culture results: Blood cultures are useful for diagnosing sepsis but are not relevant to hypovolemic shock caused by diuretic-induced fluid loss. Monitoring blood cultures would not guide immediate fluid resuscitation or hemodynamic support. They are not essential for assessing progress in this scenario. • Platelet count: Platelet monitoring is relevant for coagulopathy or bleeding disorders, which are not indicated here. The client’s hypotension and oliguria are due to fluid depletion rather than platelet abnormalities. Tracking platelet counts does not aid in assessing response to hypovolemic shock treatment.