A nurse is caring for a pregnant client diagnosed with hyperemesis gravidarum. Which nursing intervention should be the priority?

The priority intervention is IV fluid therapy with electrolyte replacement to correct dehydration and imbalances, as severe hyperemesis gravidarum can lead to maternal and fetal complications. Other options are supportive but not immediate priorities.

Understanding the Priority: Physiological Integrity and the ABC Framework

In the context of hyperemesis gravidarum (HG), the immediate threat to life is not the nausea itself, but the consequences of prolonged starvation and dehydration. The client’s history of being unable to keep any food or fluids down, combined with a significant weight loss of 8 pounds and laboratory findings of ketonuria and electrolyte imbalances, signals a state of severe volume depletion and metabolic derangement. Applying the nursing ABC (Airway, Breathing, Circulation) priority-setting framework, this client’s "Circulation" is compromised due to profound fluid volume deficit. Restoring intravascular volume and correcting electrolyte disturbances is the foundational step upon which all other interventions depend. Without hemodynamic stability, oral interventions are futile and the risk of catastrophic complications escalates.

Why Intravenous Fluid Therapy is the Priority Intervention

The correct answer is to initiate intravenous fluid therapy with electrolyte replacement. This directly addresses the critical physiological problem of hypovolemia and electrolyte depletion. The client’s ketonuria indicates that her body has shifted from using glucose to breaking down fat for energy due to starvation, a state that accelerates metabolic acidosis and worsens nausea. Intravenous administration of fluids containing dextrose and essential electrolytes like potassium and magnesium is required to break this cycle. This intervention re-establishes circulation, corrects metabolic imbalances, and provides a route for administering parenteral antiemetics if oral medications are not tolerated.

The Critical Link: Preventing Wernicke Encephalopathy

A crucial, high-acuity rationale for prioritizing intravenous therapy is the prevention of Wernicke Encephalopathy (WE), a severe and potentially irreversible neurological disorder. As highlighted in the provided case report, WE is caused by a deficiency of thiamine (vitamin B1) and can develop rapidly in pregnant women with severe HG ^[1]. The body’s thiamine stores are depleted within weeks of inadequate intake and persistent vomiting. The danger is magnified if dextrose-containing intravenous fluids are administered without first providing thiamine, as glucose metabolism consumes thiamine and can precipitate acute WE. Therefore, the priority nursing intervention involves not only initiating IV fluids but also anticipating the co-administration of high-dose intravenous thiamine before dextrose, as standard practice for this presentation. The case report describes a patient who developed neurological symptoms including nystagmus, limb ataxia, and postural instability, which were addressed with IV thiamine replacement ^[1]. This underscores that fluid and electrolyte resuscitation is the vehicle for delivering this lifesaving vitamin.

Analyzing the Other Options

- Option 1 (Provide oral nutrition with small, frequent meals and dry crackers): This is an appropriate long-term management strategy for mild nausea and vomiting of pregnancy, but it is contraindicated as a priority for a client with severe HG who is actively vomiting and unable to tolerate any oral intake. Attempting oral nutrition before stabilizing the client’s fluid and electrolyte status will likely fail and delay essential medical treatment.
- Option 3 (Administer prescribed oral antiemetic medications as needed): While antiemetics are a cornerstone of HG management, the oral route is ineffective for a client with intractable vomiting. The priority is to establish an intravenous line, which then allows for the administration of parenteral (IV) antiemetics that bypass the gastrointestinal tract and are far more likely to be effective.
- Option 4 (Offer emotional support and reassurance to the client): Emotional support is a vital, continuous nursing intervention for the psychological distress caused by HG. However, it is a psychosocial need that is secondary to the immediate physiological threat of fluid volume deficit and the risk of neurological injury from thiamine deficiency. Using Maslow’s hierarchy of needs, physiological integrity must be restored before higher-level psychosocial needs can be effectively addressed.