A nurse is caring for a 28-year-old client with acute post-streptococcal glomerulonephritis following a recent throat infection, who presents with periorbital edema, hypertension (160/95 mmHg), oliguria, and hematuria. Which nursing intervention should be the highest priority?

Hypertension is a life-threatening complication in acute glomerulonephritis, requiring immediate monitoring and antihypertensive therapy to prevent stroke or heart failure. Other options like increased fluids or high-protein diet are not priority in this acute setting.

Clinical Context and Priority Setting

This client presents with the classic nephritic syndrome triad following a throat infection: hypertension, edema, and hematuria. The blood pressure reading of 160/95 mmHg represents stage 2 hypertension and is the most immediately dangerous element in this presentation. In acute post-streptococcal glomerulonephritis (APSGN), hypertension results from sodium and water retention caused by decreased glomerular filtration, which directly increases the risk of hypertensive encephalopathy, cardiac failure, and cerebrovascular events. The immune-mediated glomerular injury, triggered by nephritogenic strains of group A beta-haemolytic streptococcus, activates the alternate complement pathway and leads to a proliferative glomerulonephritis that reduces the kidneys' ability to excrete sodium and water ^[1].

Analysis of the Correct Answer

Monitoring blood pressure and implementing prescribed antihypertensive therapy is the highest priority because uncontrolled hypertension in APSGN can rapidly progress to life-threatening complications. The pathogenesis of hypertension in this condition is primarily volume-dependent; the inflamed glomeruli cannot filter effectively, leading to oliguria and fluid overload. This expanded intravascular volume increases systemic vascular resistance and blood pressure . When blood pressure reaches 160/95 mmHg, the risk of posterior reversible encephalopathy syndrome, seizures, and intracranial hemorrhage rises substantially. Antihypertensive management, often with loop diuretics to address the volume component and vasodilators or calcium channel blockers for afterload reduction, directly mitigates these risks. The nurse must obtain frequent blood pressure readings, assess for neurological changes indicating hypertensive encephalopathy, and administer medications as prescribed without delay.

Why the Other Options Are Incorrect

Option 2: Encouraging increased fluid intake is contraindicated. The client is already oliguric due to reduced glomerular filtration, and periorbital edema signals existing fluid overload. Additional fluid would worsen hypertension, exacerbate edema, and potentially precipitate pulmonary edema or heart failure. Management of APSGN centers on fluid restriction until urine output recovers, not fluid promotion .

Option 3: Administering a high-protein diet reflects a misunderstanding of the pathophysiology. Although proteinuria can occur in APSGN, the protein loss is generally not massive enough to cause significant hypoalbuminemia as seen in nephrotic syndrome. More importantly, the injured glomeruli are already under inflammatory stress; a high protein load increases glomerular hyperfiltration and can worsen tubular injury. Standard practice is to provide a diet with moderate protein, restricted sodium, and potassium monitoring until renal function stabilizes ^[1].

Option 4: Providing frequent ambulation is inappropriate during the acute phase. The client has severe hypertension and is at risk for complications with exertion. Bed rest or limited activity is typically recommended to reduce cardiac workload and blood pressure until the acute episode resolves. Ambulation does not address the underlying volume overload or hypertension and could trigger a hypertensive crisis .

Pathophysiology-to-Practice Connection

APSGN develops when immune complexes deposit in the glomerular basement membrane following a streptococcal infection, activating complement and attracting inflammatory cells. This proliferative process narrows the capillary lumens, reducing the glomerular filtration rate ^[1]. The kidneys respond by avidly retaining sodium and water, producing the oliguria, edema, and hypertension observed in this client. Hematuria results from the damaged, inflamed capillary walls allowing red blood cells to escape into the urinary space. Understanding this mechanism clarifies why blood pressure control—through diuresis and direct vasodilation—is the cornerstone of acute management. As the glomerular inflammation subsides over days to weeks, spontaneous diuresis typically occurs, and blood pressure normalizes. The nurse's role is to protect the client from hypertensive complications during this vulnerable window by vigilant monitoring and timely medication administration .